FreeCalypso > hg > freecalypso-sw
annotate gsm-fw/nucleus/quc.c @ 431:5c75d84ffa81
rvinterf/doc: started documenting the usage of rvinterf tools
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Sat, 21 Jun 2014 23:36:13 +0000 |
parents | afceeeb2cba1 |
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rev | line source |
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1 /*************************************************************************/ |
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2 /* */ |
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3 /* Copyright Mentor Graphics Corporation 2002 */ |
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4 /* All Rights Reserved. */ |
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5 /* */ |
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6 /* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */ |
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7 /* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */ |
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8 /* SUBJECT TO LICENSE TERMS. */ |
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9 /* */ |
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10 /*************************************************************************/ |
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11 |
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12 /*************************************************************************/ |
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13 /* */ |
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14 /* FILE NAME VERSION */ |
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15 /* */ |
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16 /* quc.c Nucleus PLUS 1.14 */ |
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17 /* */ |
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18 /* COMPONENT */ |
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19 /* */ |
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20 /* QU - Queue Management */ |
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21 /* */ |
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22 /* DESCRIPTION */ |
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23 /* */ |
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24 /* This file contains the core routines for the Queue management */ |
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25 /* component. */ |
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26 /* */ |
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27 /* DATA STRUCTURES */ |
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28 /* */ |
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29 /* None */ |
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30 /* */ |
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31 /* FUNCTIONS */ |
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32 /* */ |
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33 /* QUC_Create_Queue Create a message queue */ |
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34 /* QUC_Delete_Queue Delete a message queue */ |
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35 /* QUC_Send_To_Queue Send message to a queue */ |
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36 /* QUC_Receive_From_Queue Receive a message from queue */ |
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37 /* QUC_Cleanup Cleanup on timeout or a */ |
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38 /* terminate condition */ |
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39 /* */ |
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40 /* DEPENDENCIES */ |
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41 /* */ |
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42 /* cs_extr.h Common Service functions */ |
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43 /* tc_extr.h Thread Control functions */ |
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44 /* qu_extr.h Queue functions */ |
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45 /* hi_extr.h History functions */ |
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46 /* */ |
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47 /* HISTORY */ |
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48 /* */ |
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49 /* DATE REMARKS */ |
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50 /* */ |
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51 /* 03-01-1993 Created initial version 1.0 */ |
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52 /* 04-19-1993 Verified version 1.0 */ |
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53 /* 08-09-1993 Corrected pointer retrieval */ |
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54 /* loop, resulting in version 1.0a */ |
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55 /* 08-09-1993 Verified version 1.0a */ |
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56 /* 11-01-1993 Corrected a problem with fixed- */ |
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57 /* size queues of a size equal to */ |
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58 /* one message, resulting in */ |
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59 /* version 1.0b */ |
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60 /* 11-01-1993 Verified version 1.0b */ |
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61 /* 03-01-1994 Moved non-core functions into */ |
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62 /* supplemental files, changed */ |
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63 /* function interfaces to match */ |
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64 /* those in prototype, added */ |
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65 /* register options, changed */ |
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66 /* protection logic to reduce */ |
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67 /* overhead, corrected bug in */ |
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68 /* queue reset, optimized item */ |
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69 /* copy loops, resulting in */ |
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70 /* version 1.1 */ |
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71 /* */ |
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72 /* 03-18-1994 Verified version 1.1 */ |
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73 /* 04-17-1996 updated to version 1.2 */ |
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74 /* 01-28-1998 Corrected SPR412 resulting in */ |
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75 /* version 1.2a. */ |
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76 /* 03-24-1998 Released version 1.3 */ |
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77 /* 03-26-1999 Released 1.11m (new release */ |
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78 /* numbering scheme) */ |
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79 /* 04-17-2002 Released version 1.13m */ |
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80 /* 11-07-2002 Released version 1.14 */ |
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81 /*************************************************************************/ |
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82 #define NU_SOURCE_FILE |
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83 |
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84 |
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85 #include "cs_extr.h" /* Common service functions */ |
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86 #include "tc_extr.h" /* Thread control functions */ |
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87 #include "qu_extr.h" /* Queue functions */ |
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88 #include "hi_extr.h" /* History functions */ |
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89 |
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90 |
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91 /* Define external inner-component global data references. */ |
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92 |
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93 extern CS_NODE *QUD_Created_Queues_List; |
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94 extern UNSIGNED QUD_Total_Queues; |
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95 extern TC_PROTECT QUD_List_Protect; |
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96 |
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97 |
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98 /* Define internal component function prototypes. */ |
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99 |
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100 VOID QUC_Cleanup(VOID *information); |
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101 |
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102 |
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103 /*************************************************************************/ |
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104 /* */ |
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105 /* FUNCTION */ |
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106 /* */ |
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107 /* QUC_Create_Queue */ |
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108 /* */ |
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109 /* DESCRIPTION */ |
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110 /* */ |
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111 /* This function creates a queue and then places it on the list */ |
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112 /* of created queues. */ |
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113 /* */ |
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114 /* CALLED BY */ |
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115 /* */ |
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116 /* Application */ |
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117 /* QUCE_Create_Queue Error checking shell */ |
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118 /* */ |
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119 /* CALLS */ |
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120 /* */ |
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121 /* CSC_Place_On_List Add node to linked-list */ |
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122 /* [HIC_Make_History_Entry] Make entry in history log */ |
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123 /* [TCT_Check_Stack] Stack checking function */ |
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124 /* TCT_Protect Protect created list */ |
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125 /* TCT_Unprotect Un-protect data structure */ |
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126 /* */ |
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127 /* INPUTS */ |
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128 /* */ |
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129 /* queue_ptr Queue control block pointer */ |
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130 /* name Queue name */ |
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131 /* start_address Starting address of actual */ |
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132 /* queue area */ |
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133 /* queue_size Total size of queue */ |
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134 /* message_type Type of message supported by */ |
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135 /* the queue (fixed/variable) */ |
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136 /* message_size Size of message. Variable */ |
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137 /* message-length queues, this*/ |
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138 /* represents the maximum size*/ |
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139 /* suspend_type Suspension type */ |
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140 /* */ |
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141 /* OUTPUTS */ |
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142 /* */ |
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143 /* NU_SUCCESS */ |
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144 /* */ |
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145 /* HISTORY */ |
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146 /* */ |
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147 /* DATE REMARKS */ |
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148 /* */ |
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149 /* 03-01-1993 Created initial version 1.0 */ |
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150 /* 04-19-1993 Verified version 1.0 */ |
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151 /* 03-01-1994 Changed function interfaces to */ |
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152 /* match those in prototype, */ |
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153 /* added register options, */ |
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154 /* resulting in version 1.1 */ |
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155 /* */ |
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156 /* 03-18-1994 Verified version 1.1 */ |
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157 /* */ |
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158 /*************************************************************************/ |
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159 STATUS QUC_Create_Queue(NU_QUEUE *queue_ptr, CHAR *name, |
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160 VOID *start_address, UNSIGNED queue_size, |
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161 OPTION message_type, UNSIGNED message_size, |
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162 OPTION suspend_type) |
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163 { |
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164 |
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165 R1 QU_QCB *queue; /* Queue control block ptr */ |
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166 INT i; /* Working index variable */ |
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167 NU_SUPERV_USER_VARIABLES |
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168 |
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169 /* Switch to supervisor mode */ |
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170 NU_SUPERVISOR_MODE(); |
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171 |
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172 /* Move input queue pointer into internal pointer. */ |
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173 queue = (QU_QCB *) queue_ptr; |
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174 |
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175 |
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176 #ifdef NU_ENABLE_STACK_CHECK |
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177 |
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178 /* Call stack checking function to check for an overflow condition. */ |
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179 TCT_Check_Stack(); |
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180 |
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181 #endif |
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182 |
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183 #ifdef NU_ENABLE_HISTORY |
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184 |
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185 /* Make an entry that corresponds to this function in the system history |
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186 log. */ |
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187 HIC_Make_History_Entry(NU_CREATE_QUEUE_ID, (UNSIGNED) queue, |
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188 (UNSIGNED) name, (UNSIGNED) start_address); |
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189 |
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190 #endif |
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191 |
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192 /* First, clear the queue ID just in case it is an old Queue |
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193 Control Block. */ |
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194 queue -> qu_id = 0; |
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195 |
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196 /* Fill in the queue name. */ |
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197 for (i = 0; i < NU_MAX_NAME; i++) |
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198 queue -> qu_name[i] = name[i]; |
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199 |
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200 /* Setup the queue suspension type. */ |
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201 if (suspend_type == NU_FIFO) |
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202 |
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203 /* FIFO suspension is selected, setup the flag accordingly. */ |
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204 queue -> qu_fifo_suspend = NU_TRUE; |
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205 |
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206 else |
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207 |
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208 /* Priority suspension is selected. */ |
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209 queue -> qu_fifo_suspend = NU_FALSE; |
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210 |
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211 /* Setup the queue message type. */ |
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212 if (message_type == NU_FIXED_SIZE) |
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213 |
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214 /* Fixed-size messages are required. */ |
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215 queue -> qu_fixed_size = NU_TRUE; |
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216 else |
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217 |
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218 /* Variable-size messages are required. */ |
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219 queue -> qu_fixed_size = NU_FALSE; |
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220 |
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221 /* Setup the message size. */ |
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222 queue -> qu_message_size = message_size; |
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223 |
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224 /* Clear the messages counter. */ |
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225 queue -> qu_messages = 0; |
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226 |
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227 /* Setup the actual queue parameters. */ |
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228 queue -> qu_queue_size = queue_size; |
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229 |
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230 /* If the queue supports fixed-size messages, make sure that the queue |
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231 size is an even multiple of the message size. */ |
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232 if (queue -> qu_fixed_size) |
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233 |
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234 /* Adjust the area of the queue being used. */ |
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235 queue_size = (queue_size / message_size) * message_size; |
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236 |
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237 queue -> qu_available = queue_size; |
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238 queue -> qu_start = (UNSIGNED *) start_address; |
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239 queue -> qu_end = queue -> qu_start + queue_size; |
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240 queue -> qu_read = (UNSIGNED *) start_address; |
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241 queue -> qu_write = (UNSIGNED *) start_address; |
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242 |
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243 /* Clear the suspension list pointer. */ |
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244 queue -> qu_suspension_list = NU_NULL; |
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245 |
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246 /* Clear the number of tasks waiting on the queue counter. */ |
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247 queue -> qu_tasks_waiting = 0; |
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248 |
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249 /* Clear the urgent message list pointer. */ |
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250 queue -> qu_urgent_list = NU_NULL; |
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251 |
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252 /* Initialize link pointers. */ |
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253 queue -> qu_created.cs_previous = NU_NULL; |
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254 queue -> qu_created.cs_next = NU_NULL; |
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255 |
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256 /* Protect against access to the list of created queues. */ |
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257 TCT_Protect(&QUD_List_Protect); |
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258 |
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259 /* At this point the queue is completely built. The ID can now be |
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260 set and it can be linked into the created queue list. */ |
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261 queue -> qu_id = QU_QUEUE_ID; |
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262 |
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263 /* Link the queue into the list of created queues and increment the |
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264 total number of queues in the system. */ |
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265 CSC_Place_On_List(&QUD_Created_Queues_List, &(queue -> qu_created)); |
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266 QUD_Total_Queues++; |
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267 |
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268 #ifdef INCLUDE_PROVIEW |
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269 _RTProf_DumpQueue(RT_PROF_CREATE_QUEUE,queue,RT_PROF_OK); |
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270 #endif |
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271 |
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272 /* Release protection against access to the list of created queues. */ |
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273 TCT_Unprotect(); |
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274 |
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275 /* Return to user mode */ |
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276 NU_USER_MODE(); |
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277 |
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278 /* Return successful completion. */ |
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279 return(NU_SUCCESS); |
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280 } |
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281 |
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282 |
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283 /*************************************************************************/ |
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284 /* */ |
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285 /* FUNCTION */ |
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286 /* */ |
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287 /* QUC_Delete_Queue */ |
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288 /* */ |
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289 /* DESCRIPTION */ |
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290 /* */ |
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291 /* This function deletes a queue and removes it from the list of */ |
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292 /* created queues. All tasks suspended on the queue are */ |
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293 /* resumed. Note that this function does not free the memory */ |
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294 /* associated with the queue. */ |
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295 /* */ |
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296 /* CALLED BY */ |
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297 /* */ |
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298 /* Application */ |
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299 /* QUCE_Delete_Queue Error checking shell */ |
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300 /* */ |
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301 /* CALLS */ |
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302 /* */ |
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303 /* CSC_Remove_From_List Remove node from list */ |
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304 /* [HIC_Make_History_Entry] Make entry in history log */ |
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305 /* TCC_Resume_Task Resume a suspended task */ |
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306 /* [TCT_Check_Stack] Stack checking function */ |
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307 /* TCT_Control_To_System Transfer control to system */ |
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308 /* TCT_Protect Protect created list */ |
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309 /* TCT_Set_Current_Protect Setup current protect pointer*/ |
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310 /* TCT_System_Protect Protect against system access*/ |
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311 /* TCT_System_Unprotect Release system protection */ |
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312 /* TCT_Unprotect Release protection */ |
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313 /* */ |
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314 /* INPUTS */ |
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315 /* */ |
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316 /* queue_ptr Queue control block pointer */ |
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317 /* */ |
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318 /* OUTPUTS */ |
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319 /* */ |
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320 /* NU_SUCCESS */ |
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321 /* */ |
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322 /* HISTORY */ |
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323 /* */ |
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324 /* DATE REMARKS */ |
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325 /* */ |
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326 /* 03-01-1993 Created initial version 1.0 */ |
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327 /* 04-19-1993 Verified version 1.0 */ |
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328 /* 03-01-1994 Changed function interfaces to */ |
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329 /* match those in prototype, */ |
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330 /* added register options, changed */ |
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331 /* protection logic to reduce */ |
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332 /* overhead, resulting in */ |
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333 /* version 1.1 */ |
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334 /* */ |
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335 /* 03-18-1994 Verified version 1.1 */ |
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336 /* */ |
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337 /*************************************************************************/ |
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338 STATUS QUC_Delete_Queue(NU_QUEUE *queue_ptr) |
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339 { |
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340 |
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341 R1 QU_QCB *queue; /* Queue control block ptr */ |
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342 QU_SUSPEND *suspend_ptr; /* Suspend block pointer */ |
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343 QU_SUSPEND *next_ptr; /* Next suspend block pointer*/ |
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344 STATUS preempt; /* Status for resume call */ |
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345 NU_SUPERV_USER_VARIABLES |
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346 |
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347 /* Move input queue pointer into internal pointer. */ |
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348 queue = (QU_QCB *) queue_ptr; |
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349 |
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350 /* Switch to supervisor mode */ |
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351 NU_SUPERVISOR_MODE(); |
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352 |
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353 #ifdef NU_ENABLE_STACK_CHECK |
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354 |
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355 /* Call stack checking function to check for an overflow condition. */ |
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356 TCT_Check_Stack(); |
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357 |
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358 #endif |
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359 |
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360 #ifdef NU_ENABLE_HISTORY |
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361 |
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362 /* Make an entry that corresponds to this function in the system history |
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363 log. */ |
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364 HIC_Make_History_Entry(NU_DELETE_QUEUE_ID, (UNSIGNED) queue, |
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365 (UNSIGNED) 0, (UNSIGNED) 0); |
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366 |
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367 #endif |
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368 |
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369 /* Protect against access to the queue. */ |
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370 TCT_System_Protect(); |
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371 |
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372 #ifdef INCLUDE_PROVIEW |
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373 _RTProf_DumpQueue(RT_PROF_DELETE_QUEUE,queue,RT_PROF_OK); |
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374 #endif |
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375 |
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376 /* Clear the queue ID. */ |
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377 queue -> qu_id = 0; |
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378 |
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379 /* Release protection. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
380 TCT_Unprotect(); |
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parents:
diff
changeset
|
381 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
382 /* Protect against access to the list of created queues. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
383 TCT_Protect(&QUD_List_Protect); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
384 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
385 /* Remove the queue from the list of created queues. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
386 CSC_Remove_From_List(&QUD_Created_Queues_List, &(queue -> qu_created)); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
387 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
388 /* Decrement the total number of created queues. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
389 QUD_Total_Queues--; |
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parents:
diff
changeset
|
390 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
391 /* Pickup the suspended task pointer list. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
392 suspend_ptr = queue -> qu_suspension_list; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
393 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
394 /* Walk the chain task(s) currently suspended on the queue. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
395 preempt = 0; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
396 while (suspend_ptr) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
397 { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
398 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
399 /* Protect against system access. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
400 TCT_System_Protect(); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
401 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
402 /* Resume the suspended task. Insure that the status returned is |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
403 NU_QUEUE_DELETED. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
404 suspend_ptr -> qu_return_status = NU_QUEUE_DELETED; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
405 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
406 /* Point to the next suspend structure in the link. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
407 next_ptr = (QU_SUSPEND *) (suspend_ptr -> qu_suspend_link.cs_next); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
408 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
409 /* Resume the specified task. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
410 preempt = preempt | |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
411 TCC_Resume_Task((NU_TASK *) suspend_ptr -> qu_suspended_task, |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
412 NU_QUEUE_SUSPEND); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
413 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
414 /* Determine if the next is the same as the head pointer. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
415 if (next_ptr == queue -> qu_suspension_list) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
416 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
417 /* Clear the suspension pointer to signal the end of the list |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
418 traversal. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
419 suspend_ptr = NU_NULL; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
420 else |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
421 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
422 /* Position suspend pointer to the next pointer. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
423 suspend_ptr = next_ptr; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
424 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
425 /* Modify current protection. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
426 TCT_Set_Current_Protect(&QUD_List_Protect); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
427 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
428 /* Clear the system protection. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
429 TCT_System_Unprotect(); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
430 } |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
431 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
432 /* Pickup the urgent message suspension list. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
433 suspend_ptr = queue -> qu_urgent_list; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
434 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
435 /* Walk the chain task(s) currently suspended on the queue. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
436 while (suspend_ptr) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
437 { |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
438 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
439 /* Protect against system access. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
440 TCT_System_Protect(); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
441 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
442 /* Resume the suspended task. Insure that the status returned is |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
443 NU_QUEUE_DELETED. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
444 suspend_ptr -> qu_return_status = NU_QUEUE_DELETED; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
445 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
446 /* Point to the next suspend structure in the link. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
447 next_ptr = (QU_SUSPEND *) (suspend_ptr -> qu_suspend_link.cs_next); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
448 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
449 /* Resume the specified task. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
450 preempt = preempt | |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
451 TCC_Resume_Task((NU_TASK *) suspend_ptr -> qu_suspended_task, |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
452 NU_QUEUE_SUSPEND); |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
453 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
454 /* Determine if the next is the same as the head pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
455 if (next_ptr == queue -> qu_urgent_list) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
456 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
457 /* Clear the suspension pointer to signal the end of the list |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
458 traversal. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
459 suspend_ptr = NU_NULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
460 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
461 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
462 /* Position to the next suspend block in the list. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
463 suspend_ptr = next_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
464 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
465 /* Modify current protection. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
466 TCT_Set_Current_Protect(&QUD_List_Protect); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
467 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
468 /* Clear the system protection. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
469 TCT_System_Unprotect(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
470 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
471 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
472 /* Determine if preemption needs to occur. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
473 if (preempt) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
474 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
475 /* Transfer control to system to facilitate preemption. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
476 TCT_Control_To_System(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
477 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
478 /* Release protection against access to the list of created queues. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
479 TCT_Unprotect(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
480 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
481 /* Return to user mode */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
482 NU_USER_MODE(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
483 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
484 /* Return a successful completion. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
485 return(NU_SUCCESS); |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
486 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
487 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
488 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
489 /*************************************************************************/ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
490 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
491 /* FUNCTION */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
492 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
493 /* QUC_Send_To_Queue */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
494 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
495 /* DESCRIPTION */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
496 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
497 /* This function sends a message to the specified queue. The */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
498 /* message length is determined by the caller. If there are one */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
499 /* or more tasks suspended on the queue for a message, the message */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
500 /* is copied into the message area of the first waiting task. If */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
501 /* the task's request is satisfied, it is resumed. Otherwise, if */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
502 /* the queue cannot hold the message, suspension of the calling */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
503 /* task is an option of the caller. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
504 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
505 /* CALLED BY */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
506 /* */ |
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507 /* Application */ |
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508 /* QUCE_Send_To_Queue Error checking shell */ |
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509 /* */ |
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510 /* CALLS */ |
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511 /* */ |
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512 /* CSC_Place_On_List Place on suspend list */ |
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513 /* CSC_Priority_Place_On_List Place on priority list */ |
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514 /* CSC_Remove_From_List Remove from suspend list */ |
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515 /* [HIC_Make_History_Entry] Make entry in history log */ |
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516 /* TCC_Resume_Task Resume a suspended task */ |
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517 /* TCC_Suspend_Task Suspend calling task */ |
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518 /* TCC_Task_Priority Pickup task's priority */ |
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519 /* [TCT_Check_Stack] Stack checking function */ |
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520 /* TCT_Control_To_System Transfer control to system */ |
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521 /* TCT_Current_Thread Pickup current thread pointer*/ |
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522 /* TCT_System_Protect Protect queue */ |
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523 /* TCT_Unprotect Release protection */ |
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|
524 /* */ |
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525 /* INPUTS */ |
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526 /* */ |
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527 /* queue_ptr Queue control block pointer */ |
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528 /* message Pointer to message to send */ |
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529 /* size Size of message to send */ |
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530 /* suspend Suspension option if full */ |
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|
531 /* */ |
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532 /* OUTPUTS */ |
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533 /* */ |
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534 /* NU_SUCCESS If service is successful */ |
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535 /* NU_QUEUE_FULL If queue is currently full */ |
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536 /* NU_TIMEOUT If timeout on service expires*/ |
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537 /* NU_QUEUE_DELETED If queue was deleted during */ |
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538 /* suspension */ |
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539 /* NU_QUEUE_RESET If queue was reset during */ |
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540 /* suspension */ |
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|
541 /* */ |
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542 /* HISTORY */ |
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|
543 /* */ |
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544 /* DATE REMARKS */ |
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|
545 /* */ |
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546 /* 03-01-1993 Created initial version 1.0 */ |
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547 /* 04-19-1993 Verified version 1.0 */ |
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548 /* 03-01-1994 Changed function interfaces to */ |
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|
549 /* match those in prototype, */ |
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|
550 /* added register options, changed */ |
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|
551 /* protection logic to reduce */ |
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|
552 /* overhead, optimized copy loop, */ |
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553 /* resulting in version 1.1 */ |
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|
554 /* */ |
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555 /* 03-18-1994 Verified version 1.1 */ |
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556 /* */ |
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557 /*************************************************************************/ |
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558 STATUS QUC_Send_To_Queue(NU_QUEUE *queue_ptr, VOID *message, UNSIGNED size, |
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559 UNSIGNED suspend) |
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|
560 { |
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|
561 |
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562 R1 QU_QCB *queue; /* Queue control block ptr */ |
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563 QU_SUSPEND suspend_block; /* Allocate suspension block */ |
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564 QU_SUSPEND *suspend_ptr; /* Pointer to suspend block */ |
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565 R3 UNSIGNED_PTR source; /* Pointer to source */ |
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566 R4 UNSIGNED_PTR destination; /* Pointer to destination */ |
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567 UNSIGNED copy_size; /* Partial copy size */ |
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|
568 R2 INT i; /* Working counter */ |
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diff
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|
569 TC_TCB *task; /* Task pointer */ |
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parents:
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570 STATUS preempt; /* Preempt flag */ |
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571 STATUS status; /* Completion status */ |
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572 NU_SUPERV_USER_VARIABLES |
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|
573 |
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|
574 /* Switch to supervisor mode */ |
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|
575 NU_SUPERVISOR_MODE(); |
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|
576 |
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|
577 /* Move input queue pointer into internal pointer. */ |
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578 queue = (QU_QCB *) queue_ptr; |
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|
579 |
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|
580 |
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|
581 #ifdef NU_ENABLE_STACK_CHECK |
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|
582 |
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|
583 /* Call stack checking function to check for an overflow condition. */ |
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|
584 TCT_Check_Stack(); |
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|
585 |
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|
586 #endif |
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|
587 |
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|
588 #ifdef NU_ENABLE_HISTORY |
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|
589 |
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590 /* Make an entry that corresponds to this function in the system history |
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|
591 log. */ |
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|
592 HIC_Make_History_Entry(NU_SEND_TO_QUEUE_ID, (UNSIGNED) queue, |
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|
593 (UNSIGNED) message, (UNSIGNED) size); |
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|
594 |
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|
595 #endif |
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|
596 |
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|
597 /* Initialize the status as successful. */ |
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|
598 status = NU_SUCCESS; |
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|
599 |
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|
600 /* Protect against simultaneous access to the queue. */ |
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|
601 TCT_System_Protect(); |
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|
602 |
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|
603 /* Determine if an extra word of overhead needs to be added to the |
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|
604 calculation. */ |
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|
605 if (queue -> qu_fixed_size) |
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|
606 |
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|
607 /* No overhead. */ |
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diff
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|
608 i = 0; |
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|
609 else |
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|
610 { |
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|
611 /* Variable messages have one additional word of overhead. */ |
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|
612 i = 1; |
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|
613 |
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|
614 /* Make special check to see if a suspension needs to be |
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|
615 forced for a variable length message. */ |
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|
616 if ((queue -> qu_suspension_list) && (queue -> qu_messages)) |
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|
617 { |
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|
618 |
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|
619 /* Pickup task control block pointer. */ |
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|
620 task = (TC_TCB *) TCT_Current_Thread(); |
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|
621 |
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|
622 /* Now we know that there are other task(s) are suspended trying |
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|
623 to send a variable length message. Determine whether or not |
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|
624 a suspension should be forced. */ |
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|
625 if ((queue -> qu_fifo_suspend) || |
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|
626 (suspend == NU_NO_SUSPEND) || |
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|
627 ((queue -> qu_suspension_list) -> qu_suspend_link.cs_priority <= |
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|
628 TCC_Task_Priority(task))) |
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|
629 |
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|
630 /* Bump the computed size to avoid placing the new variable |
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|
631 length message ahead of the suspended tasks. */ |
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diff
changeset
|
632 i = (INT) queue -> qu_available; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
633 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
634 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
635 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
636 /* Determine if there is enough room in the queue for the message. The |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
637 extra logic is to prevent a variable-length message from sn*/ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
638 if (queue -> qu_available < (size + i)) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
639 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
640 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
641 /* Queue does not have room for the message. Determine if |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
642 suspension is required. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
643 if (suspend) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
644 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
645 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
646 /* Suspension is requested. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
647 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
648 /* Increment the number of tasks waiting. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
649 queue -> qu_tasks_waiting++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
650 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
651 #ifdef INCLUDE_PROVIEW |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
652 _RTProf_DumpQueue(RT_PROF_SEND_TO_QUEUE,queue,RT_PROF_WAIT); |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
653 #endif |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
654 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
655 /* Setup the suspend block and suspend the calling task. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
656 suspend_ptr = &suspend_block; |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
657 suspend_ptr -> qu_queue = queue; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
658 suspend_ptr -> qu_suspend_link.cs_next = NU_NULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
659 suspend_ptr -> qu_suspend_link.cs_previous = NU_NULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
660 suspend_ptr -> qu_message_area = (UNSIGNED_PTR) message; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
661 suspend_ptr -> qu_message_size = size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
662 task = (TC_TCB *) TCT_Current_Thread(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
663 suspend_ptr -> qu_suspended_task = task; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
664 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
665 /* Determine if priority or FIFO suspension is associated with the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
666 queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
667 if (queue -> qu_fifo_suspend) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
668 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
669 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
670 /* FIFO suspension is required. Link the suspend block into |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
671 the list of suspended tasks on this queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
672 CSC_Place_On_List((CS_NODE **) &(queue -> qu_suspension_list), |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
673 &(suspend_ptr -> qu_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
674 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
675 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
676 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
677 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
678 /* Get the priority of the current thread so the suspend block |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
679 can be placed in the appropriate place. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
680 suspend_ptr -> qu_suspend_link.cs_priority = |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
681 TCC_Task_Priority(task); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
682 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
683 CSC_Priority_Place_On_List((CS_NODE **) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
684 &(queue -> qu_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
685 &(suspend_ptr -> qu_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
686 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
687 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
688 /* Finally, suspend the calling task. Note that the suspension call |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
689 automatically clears the protection on the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
690 TCC_Suspend_Task((NU_TASK *) task, NU_QUEUE_SUSPEND, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
691 QUC_Cleanup, suspend_ptr, suspend); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
692 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
693 /* Pickup the return status. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
694 status = suspend_ptr -> qu_return_status; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
695 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
696 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
697 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
698 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
699 /* Return a status of NU_QUEUE_FULL because there is no |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
700 room in the queue for the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
701 status = NU_QUEUE_FULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
702 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
703 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
704 _RTProf_DumpQueue(RT_PROF_SEND_TO_QUEUE,queue,RT_PROF_FAIL); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
705 #endif |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
706 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
707 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
708 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
709 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
710 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
711 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
712 /* Determine if a task is waiting on an empty queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
713 if ((queue -> qu_suspension_list) && (queue -> qu_messages == 0)) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
714 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
715 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
716 /* Task is waiting on an empty queue for a message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
717 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
718 /* Decrement the number of tasks waiting on queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
719 queue -> qu_tasks_waiting--; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
720 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
721 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
722 _RTProf_DumpQueue(RT_PROF_SEND_TO_QUEUE,queue,RT_PROF_OK); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
723 #endif |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
724 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
725 /* Remove the first suspended block from the list. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
726 suspend_ptr = queue -> qu_suspension_list; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
727 CSC_Remove_From_List((CS_NODE **) &(queue -> qu_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
728 &(suspend_ptr -> qu_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
729 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
730 /* Setup the source and destination pointers. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
731 source = (UNSIGNED_PTR) message; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
732 destination = suspend_ptr -> qu_message_area; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
733 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
734 /* Initialize the return status. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
735 suspend_ptr -> qu_return_status = NU_SUCCESS; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
736 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
737 /* Loop to actually copy the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
738 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
739 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
740 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
741 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
742 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
743 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
744 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
745 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
746 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
747 /* Return the size of the message copied. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
748 suspend_ptr -> qu_actual_size = size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
749 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
750 /* Wakeup the waiting task and check for preemption. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
751 preempt = |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
752 TCC_Resume_Task((NU_TASK *) suspend_ptr -> qu_suspended_task, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
753 NU_QUEUE_SUSPEND); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
754 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
755 /* Determine if preemption needs to take place. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
756 if (preempt) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
757 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
758 /* Transfer control to the system if the resumed task function |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
759 detects a preemption condition. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
760 TCT_Control_To_System(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
761 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
762 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
763 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
764 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
765 /* There is enough room in the queue and no task is waiting. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
766 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
767 /* Setup the source pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
768 source = (UNSIGNED_PTR) message; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
769 destination = queue -> qu_write; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
770 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
771 /* Process according to the type of message supported. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
772 if (queue -> qu_fixed_size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
773 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
774 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
775 /* Fixed-size messages are supported by this queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
776 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
777 /* Loop to copy the message into the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
778 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
779 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
780 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
781 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
782 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
783 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
784 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
785 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
786 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
787 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
788 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
789 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
790 /* Variable-size messages are supported. Processing must |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
791 check for queue wrap-around conditions. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
792 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
793 /* Place message size in first location. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
794 *(destination++) = size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
795 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
796 /* Check for a wrap-around condition on the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
797 if (destination >= queue -> qu_end) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
798 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
799 /* Wrap the write pointer back to the top of the queue |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
800 area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
801 destination = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
802 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
803 /* Decrement the number of words remaining by 1 for this |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
804 extra word of overhead. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
805 queue -> qu_available--; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
806 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
807 /* Calculate the number of words remaining from the write |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
808 pointer to the bottom of the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
809 copy_size = queue -> qu_end - destination; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
810 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
811 /* Determine if the message needs to be wrapped around the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
812 edge of the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
813 if (copy_size >= size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
814 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
815 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
816 /* Copy the whole message at once. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
817 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
818 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
819 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
820 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
821 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
822 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
823 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
824 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
825 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
826 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
827 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
828 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
829 /* Copy the first half of the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
830 i = (INT) copy_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
831 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
832 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
833 *(destination) = *(source++); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
834 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
835 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
836 destination++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
837 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
838 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
839 /* Copy the second half of the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
840 destination = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
841 i = (INT) (size - copy_size); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
842 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
843 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
844 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
845 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
846 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
847 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
848 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
849 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
850 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
851 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
852 /* Check again for wrap-around condition on the write pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
853 if (destination >= queue -> qu_end) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
854 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
855 /* Move the write pointer to the top of the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
856 queue -> qu_write = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
857 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
858 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
859 /* Simply copy the last position of the destination pointer |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
860 into the write pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
861 queue -> qu_write = destination; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
862 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
863 /* Decrement the number of available words. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
864 queue -> qu_available = queue -> qu_available - size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
865 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
866 /* Increment the number of messages in the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
867 queue -> qu_messages++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
868 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
869 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
870 _RTProf_DumpQueue(RT_PROF_SEND_TO_QUEUE,queue,RT_PROF_OK); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
871 #endif |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
872 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
873 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
874 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
875 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
876 /* Release protection against access to the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
877 TCT_Unprotect(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
878 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
879 /* Return to user mode */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
880 NU_USER_MODE(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
881 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
882 /* Return the completion status. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
883 return(status); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
884 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
885 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
886 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
887 /*************************************************************************/ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
888 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
889 /* FUNCTION */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
890 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
891 /* QUC_Receive_From_Queue */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
892 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
893 /* DESCRIPTION */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
894 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
895 /* This function receives a message from the specified queue. The */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
896 /* size of the message is specified by the caller. If there is a */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
897 /* message currently in the queue, the message is removed from the */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
898 /* queue and placed in the caller's area. Suspension is possible */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
899 /* if the request cannot be satisfied. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
900 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
901 /* CALLED BY */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
902 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
903 /* Application */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
904 /* QUCE_Receive_From_Queue Error checking shell */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
905 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
906 /* CALLS */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
907 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
908 /* CSC_Place_On_List Place on suspend list */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
909 /* CSC_Priority_Place_On_List Place on priority list */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
910 /* CSC_Remove_From_List Remove from suspend list */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
911 /* [HIC_Make_History_Entry] Make entry in history log */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
912 /* TCC_Resume_Task Resume a suspended task */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
913 /* TCC_Suspend_Task Suspend calling task */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
914 /* TCC_Task_Priority Pickup task's priority */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
915 /* [TCT_Check_Stack] Stack checking function */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
916 /* TCT_Control_To_System Transfer control to system */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
917 /* TCT_Current_Thread Pickup current thread pointer*/ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
918 /* TCT_System_Protect Protect queue */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
919 /* TCT_Unprotect Release protection */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
920 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
921 /* INPUTS */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
922 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
923 /* queue_ptr Queue control block pointer */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
924 /* message Pointer to message to send */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
925 /* size Size of the message */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
926 /* actual_size Size of message received */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
927 /* suspend Suspension option if empty */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
928 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
929 /* OUTPUTS */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
930 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
931 /* NU_SUCCESS If service is successful */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
932 /* NU_QUEUE_EMPTY If queue is currently empty */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
933 /* NU_TIMEOUT If timeout on service expires*/ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
934 /* NU_QUEUE_DELETED If queue was deleted during */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
935 /* suspension */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
936 /* NU_QUEUE_RESET If queue was reset during */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
937 /* suspension */ |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
938 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
939 /* HISTORY */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
940 /* */ |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
941 /* DATE REMARKS */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
942 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
943 /* 03-01-1993 Created initial version 1.0 */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
944 /* 04-19-1993 Verified version 1.0 */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
945 /* 11-01-1993 Corrected a problem resuming a */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
946 /* task suspended on a full queue */ |
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parents:
diff
changeset
|
947 /* that only has a capacity of a */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
948 /* single message, resulting in */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
949 /* version 1.0b */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
950 /* 11-01-1993 Verified version 1.0b */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
951 /* 03-01-1994 Changed function interfaces to */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
952 /* match those in prototype, */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
953 /* added register options, changed */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
954 /* protection logic to reduce */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
955 /* overhead, optimized copy loop, */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
956 /* resulting in version 1.1 */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
957 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
958 /* 03-18-1994 Verified version 1.1 */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
959 /* 01-28-1998 Corrected SPR412. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
960 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
961 /*************************************************************************/ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
962 STATUS QUC_Receive_From_Queue(NU_QUEUE *queue_ptr, VOID *message, |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
963 UNSIGNED size, UNSIGNED *actual_size, UNSIGNED suspend) |
947b1f473960
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parents:
diff
changeset
|
964 { |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
965 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
966 R1 QU_QCB *queue; /* Queue control block ptr */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
967 QU_SUSPEND suspend_block; /* Allocate suspension block */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
968 QU_SUSPEND *suspend_ptr; /* Pointer to suspend block */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
969 R3 UNSIGNED_PTR source; /* Pointer to source */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
970 R4 UNSIGNED_PTR destination; /* Pointer to destination */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
971 TC_TCB *task; /* Task pointer */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
972 UNSIGNED copy_size; /* Number of words to copy */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
973 R2 INT i; /* Working counter */ |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
974 STATUS preempt; /* Preemption flag */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
975 STATUS status; /* Completion status */ |
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parents:
diff
changeset
|
976 NU_SUPERV_USER_VARIABLES |
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parents:
diff
changeset
|
977 |
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parents:
diff
changeset
|
978 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
979 /* Move input queue pointer into internal pointer. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
980 queue = (QU_QCB *) queue_ptr; |
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parents:
diff
changeset
|
981 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
982 /* Switch to supervisor mode */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
983 NU_SUPERVISOR_MODE(); |
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parents:
diff
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|
984 |
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parents:
diff
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|
985 #ifdef NU_ENABLE_STACK_CHECK |
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parents:
diff
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|
986 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
987 /* Call stack checking function to check for an overflow condition. */ |
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parents:
diff
changeset
|
988 TCT_Check_Stack(); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
989 |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
990 #endif |
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parents:
diff
changeset
|
991 |
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parents:
diff
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|
992 #ifdef NU_ENABLE_HISTORY |
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parents:
diff
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|
993 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
994 /* Make an entry that corresponds to this function in the system history |
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parents:
diff
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|
995 log. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
996 HIC_Make_History_Entry(NU_RECEIVE_FROM_QUEUE_ID, (UNSIGNED) queue, |
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parents:
diff
changeset
|
997 (UNSIGNED) message, (UNSIGNED) size); |
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parents:
diff
changeset
|
998 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
999 #endif |
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parents:
diff
changeset
|
1000 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1001 /* Initialize the status as successful. */ |
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parents:
diff
changeset
|
1002 status = NU_SUCCESS; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1003 |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1004 /* Protect against simultaneous access to the queue. */ |
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diff
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|
1005 TCT_System_Protect(); |
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parents:
diff
changeset
|
1006 |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1007 /* Determine if an urgent message request is currently suspended. */ |
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parents:
diff
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|
1008 if (queue -> qu_urgent_list) |
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parents:
diff
changeset
|
1009 { |
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parents:
diff
changeset
|
1010 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1011 /* If so, copy the message from the suspended request block and |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1012 resume the associated task. */ |
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parents:
diff
changeset
|
1013 |
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parents:
diff
changeset
|
1014 /* Decrement the number of tasks waiting on queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1015 queue -> qu_tasks_waiting--; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1016 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1017 /* Remove the first suspended block from the list. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1018 suspend_ptr = queue -> qu_urgent_list; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1019 CSC_Remove_From_List((CS_NODE **) &(queue -> qu_urgent_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1020 &(suspend_ptr -> qu_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1021 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1022 /* Setup the source and destination pointers. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1023 destination = (UNSIGNED_PTR) message; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1024 source = suspend_ptr -> qu_message_area; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1025 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1026 /* Initialize the return status. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1027 suspend_ptr -> qu_return_status = NU_SUCCESS; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1028 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1029 /* Loop to actually copy the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1030 i = (INT) suspend_ptr -> qu_message_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1031 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1032 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1033 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1034 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1035 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1036 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1037 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1038 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1039 /* Return the size of the message copied. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1040 *actual_size = suspend_ptr -> qu_message_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1041 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1042 /* Wakeup the waiting task and check for preemption. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1043 preempt = |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1044 TCC_Resume_Task((NU_TASK *) suspend_ptr -> qu_suspended_task, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1045 NU_QUEUE_SUSPEND); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1046 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1047 /* Determine if preemption needs to take place. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1048 if (preempt) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1049 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1050 /* Transfer control to the system if the resumed task function |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1051 detects a preemption condition. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1052 TCT_Control_To_System(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1053 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1054 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1055 /* Determine if there are messages in the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1056 else if (queue -> qu_messages) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1057 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1058 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1059 /* Copy message from queue into the caller's area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1060 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1061 /* Setup the source and destination pointers. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1062 source = queue -> qu_read; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1063 destination = (UNSIGNED_PTR) message; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1064 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1065 /* Process according to the type of message supported by the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1066 if (queue -> qu_fixed_size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1067 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1068 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1069 /* Queue supports fixed-size messages. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1070 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1071 /* Copy the message from the queue area into the destination. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1072 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1073 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1074 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1075 *(destination) = *(source++); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1076 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1077 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1078 destination++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1079 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1080 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1081 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1082 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1083 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1084 /* Queue supports variable-size messages. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1085 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1086 /* Variable length message size is actually in the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1087 size = *(source++); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1088 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1089 /* Check for a wrap-around condition on the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1090 if (source >= queue -> qu_end) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1091 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1092 /* Wrap the read pointer back to the top of the queue |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1093 area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1094 source = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1095 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1096 /* Increment the number of available words in the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1097 queue -> qu_available++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1098 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1099 /* Calculate the number of words remaining from the read pointer |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1100 to the bottom of the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1101 copy_size = queue -> qu_end - source; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1102 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1103 /* Determine if the message needs to be wrapped around the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1104 edge of the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1105 if (copy_size >= size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1106 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1107 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1108 /* Copy the whole message at once. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1109 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1110 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1111 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1112 *(destination) = *(source++); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1113 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1114 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1115 destination++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1116 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1117 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1118 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1119 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1120 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1121 /* Copy the first half of the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1122 i = (INT) copy_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1123 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1124 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1125 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1126 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1127 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1128 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1129 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1130 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1131 /* Copy the second half of the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1132 source = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1133 i = (INT) (size - copy_size); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1134 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1135 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1136 *(destination) = *(source++); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1137 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1138 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1139 destination++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1140 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1141 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1142 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1143 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1144 /* Check again for wrap-around condition on the read pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1145 if (source >= queue -> qu_end) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1146 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1147 /* Move the read pointer to the top of the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1148 queue -> qu_read = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1149 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1150 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1151 /* Move the read pointer to where the copy left off. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1152 queue -> qu_read = source; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1153 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1154 /* Increment the number of available words. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1155 queue -> qu_available = queue -> qu_available + size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1156 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1157 /* Decrement the number of messages in the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1158 queue -> qu_messages--; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1159 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1160 /* Return the number of words received. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1161 *actual_size = size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1162 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1163 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1164 _RTProf_DumpQueue(RT_PROF_RECEIVE_FROM_QUEUE,queue,RT_PROF_OK); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1165 #endif |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1166 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1167 /* Determine if any tasks suspended on a full queue can be woken |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1168 up. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1169 if (queue -> qu_suspension_list) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1170 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1171 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1172 /* Overhead of each queue message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1173 if (!queue -> qu_fixed_size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1174 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1175 i = 1; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1176 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1177 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1178 i = 0; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1179 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1180 /* Pickup the suspension list and examine suspension blocks |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1181 to see if the message could now fit in the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1182 suspend_ptr = queue -> qu_suspension_list; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1183 preempt = NU_FALSE; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1184 while ((suspend_ptr) && |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1185 ((suspend_ptr -> qu_message_size + i) <= queue -> qu_available)) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1186 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1187 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1188 /* Place the suspended task's message into the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1189 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1190 /* Setup the source and destination pointers. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1191 source = suspend_ptr -> qu_message_area; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1192 destination = queue -> qu_write; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1193 size = suspend_ptr -> qu_message_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1194 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1195 /* Process according to the type of message supported. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1196 if (queue -> qu_fixed_size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1197 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1198 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1199 /* Fixed-size messages are supported by this queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1200 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1201 /* Loop to copy the message into the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1202 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1203 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1204 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1205 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1206 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1207 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1208 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1209 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1210 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1211 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1212 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1213 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1214 /* Variable-size messages are supported. Processing must |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1215 check for queue wrap-around conditions. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1216 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1217 /* Place message size in first location. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1218 *(destination++) = size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1219 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1220 /* Check for a wrap-around condition on the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1221 if (destination >= queue -> qu_end) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1222 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1223 /* Wrap the write pointer back to the top of the queue |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1224 area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1225 destination = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1226 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1227 /* Decrement the number of words remaining by 1 for this |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1228 extra word of overhead. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1229 queue -> qu_available--; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1230 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1231 /* Calculate the number of words remaining from the write |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1232 pointer to the bottom of the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1233 copy_size = queue -> qu_end - destination; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1234 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1235 /* Determine if the message needs to be wrapped around the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1236 edge of the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1237 if (copy_size >= size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1238 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1239 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1240 /* Copy the whole message at once. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1241 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1242 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1243 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1244 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1245 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1246 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1247 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1248 } while(1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1249 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1250 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1251 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1252 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1253 /* Copy the first half of the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1254 i = (INT) copy_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1255 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1256 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1257 *(destination) = *(source++); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1258 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1259 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1260 destination++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1261 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1262 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1263 /* Copy the second half of the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1264 destination = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1265 i = (INT) (size - copy_size); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1266 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1267 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1268 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1269 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1270 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1271 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1272 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1273 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1274 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1275 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1276 /* Check again for wrap-around condition on the write |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1277 pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1278 if (destination >= queue -> qu_end) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1279 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1280 /* Move the write pointer to the top of the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1281 queue -> qu_write = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1282 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1283 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1284 /* Simply copy the last position of the destination pointer |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1285 into the write pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1286 queue -> qu_write = destination; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1287 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1288 /* Decrement the number of available words. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1289 queue -> qu_available = queue -> qu_available - size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1290 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1291 /* Increment the number of messages in the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1292 queue -> qu_messages++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1293 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1294 /* Decrement the number of tasks waiting counter. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1295 queue -> qu_tasks_waiting--; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1296 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1297 /* Remove the first suspended block from the list. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1298 CSC_Remove_From_List((CS_NODE **) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1299 &(queue -> qu_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1300 &(suspend_ptr -> qu_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1301 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1302 /* Return a successful status. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1303 suspend_ptr -> qu_return_status = NU_SUCCESS; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1304 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1305 /* Resume the suspended task. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1306 preempt = preempt | |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1307 TCC_Resume_Task((NU_TASK *) suspend_ptr -> qu_suspended_task, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1308 NU_QUEUE_SUSPEND); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1309 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1310 /* Setup suspend pointer to the head of the list. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1311 suspend_ptr = queue -> qu_suspension_list; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1312 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1313 /* Overhead of each queue message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1314 if (!queue -> qu_fixed_size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1315 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1316 i = 1; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1317 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1318 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1319 i = 0; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1320 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1321 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1322 /* Determine if a preempt condition is present. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1323 if (preempt) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1324 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1325 /* Transfer control to the system if the resumed task function |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1326 detects a preemption condition. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1327 TCT_Control_To_System(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1328 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1329 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1330 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1331 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1332 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1333 /* Queue is empty. Determine if the task wants to suspend. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1334 if (suspend) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1335 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1336 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1337 /* Increment the number of tasks waiting on the queue counter. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1338 queue -> qu_tasks_waiting++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1339 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1340 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1341 _RTProf_DumpQueue(RT_PROF_RECEIVE_FROM_QUEUE,queue,RT_PROF_WAIT); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1342 #endif |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1343 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1344 /* Setup the suspend block and suspend the calling task. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1345 suspend_ptr = &suspend_block; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1346 suspend_ptr -> qu_queue = queue; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1347 suspend_ptr -> qu_suspend_link.cs_next = NU_NULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1348 suspend_ptr -> qu_suspend_link.cs_previous = NU_NULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1349 suspend_ptr -> qu_message_area = (UNSIGNED_PTR) message; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1350 suspend_ptr -> qu_message_size = size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1351 task = (TC_TCB *) TCT_Current_Thread(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1352 suspend_ptr -> qu_suspended_task = task; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1353 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1354 /* Determine if priority or FIFO suspension is associated with the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1355 queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1356 if (queue -> qu_fifo_suspend) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1357 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1358 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1359 /* FIFO suspension is required. Link the suspend block into |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1360 the list of suspended tasks on this queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1361 CSC_Place_On_List((CS_NODE **) &(queue -> qu_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1362 &(suspend_ptr -> qu_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1363 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1364 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1365 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1366 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1367 /* Get the priority of the current thread so the suspend block |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1368 can be placed in the appropriate place. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1369 suspend_ptr -> qu_suspend_link.cs_priority = |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1370 TCC_Task_Priority(task); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1371 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1372 CSC_Priority_Place_On_List((CS_NODE **) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1373 &(queue -> qu_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1374 &(suspend_ptr -> qu_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1375 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1376 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1377 /* Finally, suspend the calling task. Note that the suspension call |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1378 automatically clears the protection on the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1379 TCC_Suspend_Task((NU_TASK *) task, NU_QUEUE_SUSPEND, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1380 QUC_Cleanup, suspend_ptr, suspend); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1381 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1382 /* Pickup the status of the request. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1383 status = suspend_ptr -> qu_return_status; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1384 *actual_size = suspend_ptr -> qu_actual_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1385 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1386 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1387 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1388 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1389 /* Return a status of NU_QUEUE_EMPTY because there are no |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1390 messages in the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1391 status = NU_QUEUE_EMPTY; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1392 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1393 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1394 _RTProf_DumpQueue(RT_PROF_RECEIVE_FROM_QUEUE,queue,RT_PROF_FAIL); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1395 #endif |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
1396 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1397 } |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1398 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1399 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
1400 /* Release protection against access to the queue. */ |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1401 TCT_Unprotect(); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1402 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1403 /* Return to user mode */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1404 NU_USER_MODE(); |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
1405 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1406 /* Return the completion status. */ |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1407 return(status); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1408 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1409 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1410 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1411 /*************************************************************************/ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1412 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1413 /* FUNCTION */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1414 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1415 /* QUC_Cleanup */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1416 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1417 /* DESCRIPTION */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1418 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1419 /* This function is responsible for removing a suspension block */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1420 /* from a queue. It is not called unless a timeout or a task */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1421 /* terminate is in progress. Note that protection is already in */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1422 /* effect - the same protection at suspension time. This routine */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1423 /* must be called from Supervisor mode in Supervisor/User mode */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1424 /* switching kernels. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1425 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1426 /* CALLED BY */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1427 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1428 /* TCC_Timeout Task timeout */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1429 /* TCC_Terminate Task terminate */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1430 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1431 /* CALLS */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1432 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1433 /* CSC_Remove_From_List Remove suspend block from */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1434 /* the suspension list */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1435 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1436 /* INPUTS */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1437 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1438 /* information Pointer to suspend block */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1439 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1440 /* OUTPUTS */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1441 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1442 /* None */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1443 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1444 /* HISTORY */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1445 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1446 /* DATE REMARKS */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1447 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1448 /* 03-01-1993 Created initial version 1.0 */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1449 /* 04-19-1993 Verified version 1.0 */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1450 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1451 /*************************************************************************/ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1452 VOID QUC_Cleanup(VOID *information) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1453 { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1454 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1455 QU_SUSPEND *suspend_ptr; /* Suspension block pointer */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
1456 NU_SUPERV_USER_VARIABLES |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1457 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1458 /* Switch to supervisor mode */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1459 NU_SUPERVISOR_MODE(); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1460 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1461 /* Use the information pointer as a suspend pointer. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
1462 suspend_ptr = (QU_SUSPEND *) information; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1463 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1464 /* By default, indicate that the service timed-out. It really does not |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
1465 matter if this function is called from a terminate request since |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1466 the task does not resume. */ |
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parents:
diff
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|
1467 suspend_ptr -> qu_return_status = NU_TIMEOUT; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1468 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1469 /* Decrement the number of tasks waiting counter. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
1470 (suspend_ptr -> qu_queue) -> qu_tasks_waiting--; |
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parents:
diff
changeset
|
1471 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1472 /* Unlink the suspend block from the suspension list. */ |
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parents:
diff
changeset
|
1473 if ((suspend_ptr -> qu_queue) -> qu_urgent_list) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1474 { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1475 /* Unlink the suspend block from the suspension list. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1476 CSC_Remove_From_List((CS_NODE **) |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
1477 &((suspend_ptr -> qu_queue) -> qu_urgent_list), |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1478 &(suspend_ptr -> qu_suspend_link)); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1479 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1480 else |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1481 { |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1482 /* Unlink the suspend block from the suspension list. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1483 CSC_Remove_From_List((CS_NODE **) |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1484 &((suspend_ptr -> qu_queue) -> qu_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1485 &(suspend_ptr -> qu_suspend_link)); |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1486 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1487 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1488 /* Return to user mode */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1489 NU_USER_MODE(); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1490 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1491 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1492 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1493 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1494 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1495 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1496 |