FreeCalypso > hg > freecalypso-sw
annotate nuc-fw/nucleus/qus.c @ 108:3b9cc76f2073
target-utils/Makefile: make clean: support for subset packaging
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Fri, 13 Sep 2013 17:00:09 +0000 |
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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 /* qus.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 supplemental routines for the Queue */ |
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25 /* Management 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 /* QUS_Reset_Queue Reset a queue */ |
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34 /* QUS_Send_To_Front_Of_Queue Send message to queue's front*/ |
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35 /* QUS_Broadcast_To_Queue Broadcast a message to queue */ |
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36 /* */ |
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37 /* DEPENDENCIES */ |
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38 /* */ |
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39 /* cs_extr.h Common Service functions */ |
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40 /* tc_extr.h Thread Control functions */ |
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41 /* qu_extr.h Queue functions */ |
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42 /* hi_extr.h History functions */ |
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43 /* */ |
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44 /* HISTORY */ |
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45 /* */ |
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46 /* DATE REMARKS */ |
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47 /* */ |
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48 /* 03-01-1994 Created initial version 1.1 from */ |
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49 /* routines originally in core */ |
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50 /* */ |
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51 /* 03-18-1994 Verified version 1.1 */ |
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52 /* 04-17-1996 updated to version 1.2 */ |
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53 /* 02-04-1998 Corrected SPR434 resulting in */ |
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54 /* version 1.2a. */ |
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55 /* 03-24-1998 Released version 1.3 */ |
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56 /* 03-26-1999 Released 1.11m (new release */ |
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57 /* numbering scheme) */ |
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58 /* 04-17-2002 Released version 1.13m */ |
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59 /* 11-07-2002 Released version 1.14 */ |
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60 /*************************************************************************/ |
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61 #define NU_SOURCE_FILE |
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62 |
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63 |
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64 #include "cs_extr.h" /* Common service functions */ |
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65 #include "tc_extr.h" /* Thread control functions */ |
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66 #include "qu_extr.h" /* Queue functions */ |
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67 #include "hi_extr.h" /* History functions */ |
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68 #include "profiler.h" /* ProView interface */ |
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69 |
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70 |
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71 /* Define internal component function prototypes. */ |
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72 |
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73 VOID QUC_Cleanup(VOID *information); |
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74 |
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75 |
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76 /*************************************************************************/ |
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77 /* */ |
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78 /* FUNCTION */ |
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79 /* */ |
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80 /* QUS_Reset_Queue */ |
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81 /* */ |
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82 /* DESCRIPTION */ |
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83 /* */ |
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84 /* This function resets the specified queue back to the original */ |
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85 /* state. Any messages in the queue are discarded. Also, any */ |
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86 /* tasks currently suspended on the queue are resumed with the */ |
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87 /* reset status. */ |
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88 /* */ |
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89 /* CALLED BY */ |
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90 /* */ |
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91 /* Application */ |
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92 /* QUSE_Reset_Queue Error checking shell */ |
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93 /* */ |
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94 /* CALLS */ |
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95 /* */ |
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96 /* [HIC_Make_History_Entry] Make entry in history log */ |
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97 /* TCC_Resume_Task Resume a suspended task */ |
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98 /* [TCT_Check_Stack] Stack checking function */ |
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99 /* TCT_Control_To_System Transfer control to system */ |
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100 /* TCT_System_Protect Protect queue data structures*/ |
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101 /* TCT_Unprotect Release protection */ |
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102 /* */ |
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103 /* INPUTS */ |
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104 /* */ |
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105 /* queue_ptr Queue control block pointer */ |
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106 /* */ |
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107 /* OUTPUTS */ |
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108 /* */ |
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109 /* NU_SUCCESS */ |
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110 /* */ |
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111 /* HISTORY */ |
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112 /* */ |
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113 /* DATE REMARKS */ |
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114 /* */ |
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115 /* 03-01-1993 Created initial version 1.0 */ |
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116 /* 04-19-1993 Verified version 1.0 */ |
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117 /* 03-01-1994 Changed function interfaces to */ |
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118 /* match those in prototype, */ |
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119 /* added register options, changed */ |
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120 /* protection logic to reduce */ |
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121 /* overhead, fixed read and write */ |
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122 /* pointers to both point at the */ |
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123 /* start, resulting in version 1.1 */ |
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124 /* */ |
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125 /* 03-18-1994 Verified version 1.1 */ |
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126 /* 02-04-1998 Corrected SPR434. */ |
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127 /* */ |
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128 /*************************************************************************/ |
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129 STATUS QUS_Reset_Queue(NU_QUEUE *queue_ptr) |
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130 { |
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131 |
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132 R1 QU_QCB *queue; /* Queue control block ptr */ |
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133 QU_SUSPEND *suspend_ptr; /* Suspend block pointer */ |
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134 QU_SUSPEND *next_ptr; /* Next suspend block pointer*/ |
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135 STATUS preempt; /* Status for resume call */ |
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136 NU_SUPERV_USER_VARIABLES |
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137 |
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138 /* Move input queue pointer into internal pointer. */ |
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139 queue = (QU_QCB *) queue_ptr; |
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140 |
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141 /* Switch to supervisor mode */ |
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142 NU_SUPERVISOR_MODE(); |
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143 |
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144 #ifdef NU_ENABLE_STACK_CHECK |
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145 |
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146 /* Call stack checking function to check for an overflow condition. */ |
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147 TCT_Check_Stack(); |
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148 |
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149 #endif |
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150 |
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151 #ifdef NU_ENABLE_HISTORY |
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152 |
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153 /* Make an entry that corresponds to this function in the system history |
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154 log. */ |
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155 HIC_Make_History_Entry(NU_RESET_QUEUE_ID, (UNSIGNED) queue, |
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156 (UNSIGNED) 0, (UNSIGNED) 0); |
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157 |
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158 #endif |
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159 |
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160 /* Protect against access to the queue. */ |
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161 TCT_System_Protect(); |
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162 |
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163 /* Pickup the suspended task suspension list. */ |
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164 suspend_ptr = queue -> qu_suspension_list; |
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165 |
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166 /* Walk the chain task(s) currently suspended on the queue. */ |
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167 preempt = 0; |
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168 while (suspend_ptr) |
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169 { |
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170 |
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171 /* Resume the suspended task. Insure that the status returned is |
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172 NU_QUEUE_RESET. */ |
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173 suspend_ptr -> qu_return_status = NU_QUEUE_RESET; |
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174 |
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175 /* Point to the next suspend structure in the link. */ |
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176 next_ptr = (QU_SUSPEND *) (suspend_ptr -> qu_suspend_link.cs_next); |
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177 |
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178 /* Resume the specified task. */ |
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179 preempt = preempt | |
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180 TCC_Resume_Task((NU_TASK *) suspend_ptr -> qu_suspended_task, |
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181 NU_QUEUE_SUSPEND); |
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182 |
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183 /* Determine if the next is the same as the head pointer. */ |
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184 if (next_ptr == queue -> qu_suspension_list) |
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185 |
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186 /* Clear the suspension pointer to signal the end of the list |
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187 traversal. */ |
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188 suspend_ptr = NU_NULL; |
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189 else |
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190 |
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191 /* Position the suspend pointer to the next suspend block. */ |
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192 suspend_ptr = next_ptr; |
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193 } |
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194 |
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195 /* Pickup the urgent message suspension list. */ |
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196 suspend_ptr = queue -> qu_urgent_list; |
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197 |
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198 /* Walk the chain task(s) currently suspended on the queue. */ |
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199 while (suspend_ptr) |
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200 { |
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201 |
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202 /* Resume the suspended task. Insure that the status returned is |
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203 NU_QUEUE_RESET. */ |
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204 suspend_ptr -> qu_return_status = NU_QUEUE_RESET; |
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205 |
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206 /* Point to the next suspend structure in the link. */ |
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207 next_ptr = (QU_SUSPEND *) (suspend_ptr -> qu_suspend_link.cs_next); |
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208 |
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209 /* Resume the specified task. */ |
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210 preempt = preempt | |
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211 TCC_Resume_Task((NU_TASK *) suspend_ptr -> qu_suspended_task, |
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212 NU_QUEUE_SUSPEND); |
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213 |
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214 /* Determine if the next is the same as the head pointer. */ |
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215 if (next_ptr == queue -> qu_urgent_list) |
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216 |
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217 /* Clear the suspension pointer to signal the end of the list |
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218 traversal. */ |
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219 suspend_ptr = NU_NULL; |
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220 else |
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221 |
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222 /* Position suspend pointer to the next suspend block. */ |
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223 suspend_ptr = next_ptr; |
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224 } |
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225 |
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226 /* Initialize various elements of the queue. */ |
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227 queue -> qu_available = queue -> qu_end - queue -> qu_start; |
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228 queue -> qu_messages = 0; |
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229 queue -> qu_read = queue -> qu_start; |
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230 queue -> qu_write = queue -> qu_start; |
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231 queue -> qu_tasks_waiting = 0; |
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232 queue -> qu_suspension_list = NU_NULL; |
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233 queue -> qu_urgent_list = NU_NULL; |
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234 |
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235 #ifdef INCLUDE_PROVIEW |
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236 _RTProf_DumpQueue(RT_PROF_RESET_QUEUE,queue,RT_PROF_OK); |
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237 #endif |
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238 |
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239 /* Determine if preemption needs to occur. */ |
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240 if (preempt) |
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241 |
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242 /* Transfer control to system to facilitate preemption. */ |
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243 TCT_Control_To_System(); |
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244 |
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245 /* Release protection against access to the queue. */ |
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246 TCT_Unprotect(); |
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247 |
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248 /* Return to user mode */ |
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249 NU_USER_MODE(); |
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250 |
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251 /* Return a successful completion. */ |
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252 return(NU_SUCCESS); |
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253 } |
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254 |
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255 |
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256 /*************************************************************************/ |
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257 /* */ |
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258 /* FUNCTION */ |
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259 /* */ |
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260 /* QUS_Send_To_Front_Of_Queue */ |
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261 /* */ |
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262 /* DESCRIPTION */ |
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263 /* */ |
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264 /* This function sends a message to the front of the specified */ |
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265 /* message queue. The message length is determined by the caller. */ |
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266 /* If there are any tasks suspended on the queue for a message, the */ |
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267 /* message is copied into the message area of the first waiting */ |
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268 /* task and that task is resumed. If there is enough room in the */ |
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269 /* queue, the message is copied in front of all other messages. */ |
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270 /* If there is not enough room in the queue, suspension of the */ |
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271 /* caller is possible. */ |
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272 /* */ |
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273 /* CALLED BY */ |
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274 /* */ |
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275 /* Application */ |
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276 /* QUSE_Send_To_Front_Of_Queue Error checking shell */ |
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277 /* */ |
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278 /* CALLS */ |
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279 /* */ |
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280 /* CSC_Place_On_List Place on suspend list */ |
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281 /* CSC_Remove_From_List Remove from suspend list */ |
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282 /* [HIC_Make_History_Entry] Make entry in history log */ |
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283 /* TCC_Resume_Task Resume a suspended task */ |
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284 /* TCC_Suspend_Task Suspend calling task */ |
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285 /* [TCT_Check_Stack] Stack checking function */ |
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286 /* TCT_Control_To_System Transfer control to system */ |
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287 /* TCT_Current_Thread Pickup current thread pointer*/ |
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288 /* TCT_System_Protect Protect queue */ |
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289 /* TCT_Unprotect Release protection */ |
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290 /* */ |
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291 /* INPUTS */ |
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292 /* */ |
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293 /* queue_ptr Queue control block pointer */ |
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294 /* message Pointer to message to send */ |
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295 /* size Size of message to send */ |
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296 /* suspend Suspension option if full */ |
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297 /* */ |
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298 /* OUTPUTS */ |
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299 /* */ |
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300 /* NU_SUCCESS If service is successful */ |
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301 /* NU_QUEUE_FULL If queue is currently full */ |
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302 /* NU_TIMEOUT If timeout on service expires*/ |
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303 /* NU_QUEUE_DELETED If queue was deleted during */ |
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304 /* suspension */ |
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305 /* NU_QUEUE_RESET If queue was reset during */ |
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306 /* suspension */ |
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307 /* */ |
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308 /* HISTORY */ |
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309 /* */ |
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310 /* DATE REMARKS */ |
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311 /* */ |
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312 /* 03-01-1993 Created initial version 1.0 */ |
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313 /* 04-19-1993 Verified version 1.0 */ |
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314 /* 03-01-1994 Changed function interfaces to */ |
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315 /* match those in prototype, */ |
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316 /* added register options, changed */ |
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317 /* protection logic to reduce */ |
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318 /* overhead, optimized copy loop, */ |
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319 /* resulting in version 1.1 */ |
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320 /* */ |
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321 /* 03-18-1994 Verified version 1.1 */ |
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322 /* */ |
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323 /*************************************************************************/ |
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324 STATUS QUS_Send_To_Front_Of_Queue(NU_QUEUE *queue_ptr, VOID *message, |
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325 UNSIGNED size, UNSIGNED suspend) |
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326 { |
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327 |
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328 R1 QU_QCB *queue; /* Queue control block ptr */ |
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329 QU_SUSPEND suspend_block; /* Allocate suspension block */ |
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330 QU_SUSPEND *suspend_ptr; /* Pointer to suspend block */ |
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331 R3 UNSIGNED_PTR source; /* Pointer to source */ |
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332 R4 UNSIGNED_PTR destination; /* Pointer to destination */ |
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333 UNSIGNED copy_size; /* Partial copy size */ |
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334 R2 INT i; /* Working counter */ |
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335 TC_TCB *task; /* Task pointer */ |
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336 STATUS preempt; /* Preempt flag */ |
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337 STATUS status; /* Completion status */ |
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338 NU_SUPERV_USER_VARIABLES |
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339 |
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340 /* Switch to supervisor mode */ |
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341 NU_SUPERVISOR_MODE(); |
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342 |
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343 /* Move input queue pointer into internal pointer. */ |
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344 queue = (QU_QCB *) queue_ptr; |
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345 |
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346 |
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347 #ifdef NU_ENABLE_STACK_CHECK |
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348 |
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349 /* Call stack checking function to check for an overflow condition. */ |
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350 TCT_Check_Stack(); |
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351 |
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352 #endif |
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353 |
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354 #ifdef NU_ENABLE_HISTORY |
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355 |
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356 /* Make an entry that corresponds to this function in the system history |
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357 log. */ |
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358 HIC_Make_History_Entry(NU_SEND_TO_FRONT_OF_QUEUE_ID, (UNSIGNED) queue, |
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359 (UNSIGNED) message, (UNSIGNED) size); |
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360 |
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361 #endif |
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362 |
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363 /* Initialize the status as successful. */ |
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364 status = NU_SUCCESS; |
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365 |
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366 /* Protect against simultaneous access to the queue. */ |
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367 TCT_System_Protect(); |
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368 |
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369 /* Determine if an extra word of overhead needs to be added to the |
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370 calculation. */ |
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371 if (queue -> qu_fixed_size) |
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372 |
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373 /* No overhead. */ |
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374 i = 0; |
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375 else |
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376 { |
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377 /* Variable messages have one additional word of overhead. */ |
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378 i = 1; |
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|
379 |
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|
380 /* Make special check to see if a suspension needs to be |
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381 forced for a variable length message. */ |
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|
382 if ((queue -> qu_suspension_list) && (queue -> qu_messages)) |
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|
383 { |
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|
384 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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|
385 /* Pickup task control block pointer. */ |
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|
386 task = (TC_TCB *) TCT_Current_Thread(); |
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|
387 |
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|
388 /* Now we know that there are other task(s) are suspended trying |
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|
389 to send a variable length message. Determine whether or not |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
390 a suspension should be forced. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
391 if ((queue -> qu_fifo_suspend) || |
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|
392 (suspend == NU_NO_SUSPEND) || |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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|
393 ((queue -> qu_suspension_list) -> qu_suspend_link.cs_priority <= |
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parents:
diff
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|
394 TCC_Task_Priority(task))) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
395 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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|
396 /* Bump the computed size to avoid placing the new variable |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
397 length message ahead of the suspended tasks. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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|
398 i = (INT) queue -> qu_available; |
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|
399 } |
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|
400 } |
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parents:
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|
401 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
402 /* Determine if there is enough room in the queue for the message. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
403 if (queue -> qu_available < (size + i)) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
404 { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
405 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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|
406 /* Queue does not have room for the message. Determine if |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
407 suspension is required. */ |
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parents:
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|
408 if (suspend) |
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parents:
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|
409 { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
410 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
411 /* Suspension is requested. */ |
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parents:
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|
412 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
413 /* Increment the number of tasks waiting. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
414 queue -> qu_tasks_waiting++; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
415 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
416 #ifdef INCLUDE_PROVIEW |
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|
417 _RTProf_DumpQueue(RT_PROF_SEND_TO_FRONT_OF_QUEUE,queue,RT_PROF_WAIT); |
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|
418 #endif |
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diff
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|
419 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
420 /* Setup the suspend block and suspend the calling task. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
421 suspend_ptr = &suspend_block; |
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parents:
diff
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|
422 suspend_ptr -> qu_queue = queue; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
423 suspend_ptr -> qu_suspend_link.cs_next = NU_NULL; |
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diff
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|
424 suspend_ptr -> qu_suspend_link.cs_previous = NU_NULL; |
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parents:
diff
changeset
|
425 suspend_ptr -> qu_message_area = (UNSIGNED_PTR) message; |
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parents:
diff
changeset
|
426 suspend_ptr -> qu_message_size = size; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
427 task = (TC_TCB *) TCT_Current_Thread(); |
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diff
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|
428 suspend_ptr -> qu_suspended_task = task; |
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parents:
diff
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|
429 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
430 /* Place the task on the urgent message suspension list. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
431 CSC_Place_On_List((CS_NODE **) &(queue -> qu_urgent_list), |
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parents:
diff
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|
432 &(suspend_ptr -> qu_suspend_link)); |
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parents:
diff
changeset
|
433 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
434 /* Move the head pointer of the list to make this suspension the |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
435 first in the list. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
436 queue -> qu_urgent_list = (QU_SUSPEND *) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
437 (queue -> qu_urgent_list) -> qu_suspend_link.cs_previous; |
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parents:
diff
changeset
|
438 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
439 /* Finally, suspend the calling task. Note that the suspension call |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
440 automatically clears the protection on the queue. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
441 TCC_Suspend_Task((NU_TASK *) task, NU_QUEUE_SUSPEND, |
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parents:
diff
changeset
|
442 QUC_Cleanup, suspend_ptr, suspend); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
443 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
444 /* Pickup the return status. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
445 status = suspend_ptr -> qu_return_status; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
446 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
447 else |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
448 { |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
449 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
450 /* Return a status of NU_QUEUE_FULL because there is no |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
451 room in the queue for the message. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
452 status = NU_QUEUE_FULL; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
453 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
454 #ifdef INCLUDE_PROVIEW |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
455 _RTProf_DumpQueue(RT_PROF_SEND_TO_FRONT_OF_QUEUE,queue,RT_PROF_FAIL); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
456 #endif |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
457 } |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
458 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
459 else |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
460 { |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
461 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
462 /* Determine if a task is waiting on an empty queue. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
463 if ((queue -> qu_suspension_list) && (queue -> qu_messages == 0)) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
464 { |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
465 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
466 /* Task is waiting on queue for a message. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
467 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
468 /* Decrement the number of tasks waiting on queue. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
469 queue -> qu_tasks_waiting--; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
470 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
471 #ifdef INCLUDE_PROVIEW |
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parents:
diff
changeset
|
472 _RTProf_DumpQueue(RT_PROF_SEND_TO_FRONT_OF_QUEUE,queue,RT_PROF_OK); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
473 #endif |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
474 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
475 /* Remove the first suspended block from the list. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
476 suspend_ptr = queue -> qu_suspension_list; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
477 CSC_Remove_From_List((CS_NODE **) &(queue -> qu_suspension_list), |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
478 &(suspend_ptr -> qu_suspend_link)); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
479 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
480 /* Setup the source and destination pointers. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
481 source = (UNSIGNED_PTR) message; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
482 destination = suspend_ptr -> qu_message_area; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
483 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
484 /* Initialize the return status. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
485 suspend_ptr -> qu_return_status = NU_SUCCESS; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
486 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
487 /* Loop to actually copy the message. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
488 i = (INT) size; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
489 do |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
490 { |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
491 *(destination++) = *(source); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
492 if ((--i) == 0) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
493 break; |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
494 source++; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
495 } while (1); |
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 /* Return the size of the message copied. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
498 suspend_ptr -> qu_actual_size = size; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
499 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
500 /* Wakeup the waiting task and check for preemption. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
501 preempt = |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
502 TCC_Resume_Task((NU_TASK *) suspend_ptr -> qu_suspended_task, |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
503 NU_QUEUE_SUSPEND); |
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 /* Determine if preemption needs to take place. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
506 if (preempt) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
507 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
508 /* Transfer control to the system if the resumed task function |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
509 detects a preemption condition. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
510 TCT_Control_To_System(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
511 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
512 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
513 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
514 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
515 /* 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
|
516 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
517 /* Setup the source pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
518 source = (UNSIGNED_PTR) message; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
519 destination = queue -> qu_read; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
520 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
521 /* Process according to the type of message supported. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
522 if (queue -> qu_fixed_size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
523 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
524 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
525 /* Fixed-size message queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
526 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
527 /* Determine if the read pointer is at the top of the queue |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
528 area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
529 if (destination == queue -> qu_start) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
530 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
531 /* Prepare to place the message in the lower part |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
532 of the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
533 destination = queue -> qu_end - size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
534 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
535 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
536 /* Backup the length of a message from the current |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
537 read pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
538 destination = destination - size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
539 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
540 /* Adjust the actual read pointer before the copy is done. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
541 queue -> qu_read = destination; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
542 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
543 /* Copy the message into the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
544 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
545 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
546 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
547 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
548 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
549 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
550 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
551 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
552 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
553 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
554 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
555 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
556 /* Variable-size message queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
557 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
558 /* Calculate the number of words remaining at the top of the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
559 queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
560 copy_size = destination - queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
561 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
562 /* Determine if part of the message needs to be placed at the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
563 bottom of the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
564 if (copy_size < (size + i)) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
565 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
566 /* Compute the starting location for the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
567 destination = queue -> qu_end - ((size +i) - copy_size); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
568 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
569 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
570 /* Compute the starting location for the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
571 destination = destination - (size + i); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
572 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
573 /* Adjust the actual queue read pointer also. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
574 queue -> qu_read = destination; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
575 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
576 /* Place message size in first location. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
577 *(destination++) = size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
578 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
579 /* Check for a wrap-around condition on the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
580 if (destination >= queue -> qu_end) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
581 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
582 /* 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
|
583 area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
584 destination = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
585 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
586 /* Decrement the number of words remaining by 1 for this |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
587 extra word of overhead. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
588 queue -> qu_available--; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
589 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
590 /* Calculate the number of words remaining from the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
591 destination pointer to the bottom of the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
592 copy_size = queue -> qu_end - destination; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
593 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
594 /* Determine if the message needs to be wrapped around the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
595 edge of the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
596 if (copy_size >= size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
597 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
598 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
599 /* Copy the whole message at once. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
600 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
601 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
602 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
603 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
604 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
605 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
606 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
607 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
608 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
609 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
610 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
611 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
612 /* Copy the first half of the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
613 i = (INT) copy_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
614 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
615 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
616 *(destination) = *(source++); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
617 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
618 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
619 destination++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
620 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
621 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
622 /* Copy the second half of the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
623 destination = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
624 i = (INT) (size - copy_size); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
625 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
626 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
627 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
628 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
629 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
630 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
631 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
632 } |
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
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|
635 /* Decrement the number of available words. */ |
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|
636 queue -> qu_available = queue -> qu_available - size; |
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|
637 |
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parents:
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|
638 /* Increment the number of messages in the queue. */ |
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|
639 queue -> qu_messages++; |
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|
640 |
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641 #ifdef INCLUDE_PROVIEW |
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642 _RTProf_DumpQueue(RT_PROF_SEND_TO_FRONT_OF_QUEUE,queue,RT_PROF_OK); |
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643 #endif |
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|
644 |
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|
645 } |
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|
646 } |
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|
647 |
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648 /* Release protection against access to the queue. */ |
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|
649 TCT_Unprotect(); |
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|
650 |
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|
651 /* Return to user mode */ |
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|
652 NU_USER_MODE(); |
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|
653 |
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|
654 /* Return the completion status. */ |
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|
655 return(status); |
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|
656 } |
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|
657 |
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|
658 |
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|
659 /*************************************************************************/ |
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|
660 /* */ |
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|
661 /* FUNCTION */ |
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|
662 /* */ |
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663 /* QUS_Broadcast_To_Queue */ |
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|
664 /* */ |
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|
665 /* DESCRIPTION */ |
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|
666 /* */ |
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|
667 /* This function sends a message to all tasks waiting for a message */ |
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parents:
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668 /* from the specified queue. If there are no tasks waiting for a */ |
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669 /* message the service performs like a standard send request. */ |
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|
670 /* */ |
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|
671 /* CALLED BY */ |
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|
672 /* */ |
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|
673 /* Application */ |
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|
674 /* QUSE_Broadcast_To_Queue Error checking shell */ |
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|
675 /* */ |
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|
676 /* CALLS */ |
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|
677 /* */ |
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|
678 /* CSC_Place_On_List Place on suspend list */ |
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|
679 /* CSC_Priority_Place_On_List Place on priority list */ |
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|
680 /* CSC_Remove_From_List Remove from suspend list */ |
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|
681 /* [HIC_Make_History_Entry] Make entry in history log */ |
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|
682 /* TCC_Resume_Task Resume a suspended task */ |
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|
683 /* TCC_Suspend_Task Suspend calling task */ |
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|
684 /* TCC_Task_Priority Pickup task's priority */ |
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|
685 /* [TCT_Check_Stack] Stack checking function */ |
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|
686 /* TCT_Control_To_System Transfer control to system */ |
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|
687 /* TCT_Current_Thread Pickup current thread pointer*/ |
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|
688 /* TCT_System_Protect Protect queue */ |
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|
689 /* TCT_Unprotect Release protection */ |
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|
690 /* */ |
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|
691 /* INPUTS */ |
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|
692 /* */ |
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|
693 /* queue_ptr Queue control block pointer */ |
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|
694 /* message Pointer to message to send */ |
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|
695 /* size Size of message to send */ |
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|
696 /* suspend Suspension option if full */ |
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|
697 /* */ |
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diff
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|
698 /* OUTPUTS */ |
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|
699 /* */ |
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diff
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|
700 /* NU_SUCCESS If service is successful */ |
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|
701 /* NU_QUEUE_FULL If queue is currently full */ |
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|
702 /* NU_TIMEOUT If timeout on service expires*/ |
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|
703 /* NU_QUEUE_DELETED If queue was deleted during */ |
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parents:
diff
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|
704 /* suspension */ |
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|
705 /* NU_QUEUE_RESET If queue was reset during */ |
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parents:
diff
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|
706 /* suspension */ |
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parents:
diff
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|
707 /* */ |
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parents:
diff
changeset
|
708 /* HISTORY */ |
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parents:
diff
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|
709 /* */ |
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parents:
diff
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|
710 /* DATE REMARKS */ |
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parents:
diff
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|
711 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
712 /* 03-01-1993 Created initial version 1.0 */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
713 /* 04-19-1993 Verified version 1.0 */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
714 /* 03-01-1994 Changed function interfaces to */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
715 /* match those in prototype, */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
716 /* added register options, changed */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
717 /* protection logic to reduce */ |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
718 /* overhead, optimized copy loop, */ |
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parents:
diff
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|
719 /* resulting in version 1.1 */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
720 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
721 /* 03-18-1994 Verified version 1.1 */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
722 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
723 /*************************************************************************/ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
724 STATUS QUS_Broadcast_To_Queue(NU_QUEUE *queue_ptr, VOID *message, |
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|
725 UNSIGNED size, UNSIGNED suspend) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
726 { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
727 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
728 R1 QU_QCB *queue; /* Queue control block ptr */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
729 QU_SUSPEND suspend_block; /* Allocate suspension block */ |
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parents:
diff
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|
730 QU_SUSPEND *suspend_ptr; /* Pointer to suspend block */ |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
731 R3 UNSIGNED_PTR source; /* Pointer to source */ |
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parents:
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|
732 R4 UNSIGNED_PTR destination; /* Pointer to destination */ |
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parents:
diff
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|
733 UNSIGNED copy_size; /* Partial copy size */ |
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parents:
diff
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|
734 R2 INT i; /* Working counter */ |
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parents:
diff
changeset
|
735 TC_TCB *task; /* Task pointer */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
736 STATUS preempt; /* Preempt flag */ |
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diff
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|
737 STATUS status; /* Completion status */ |
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|
738 NU_SUPERV_USER_VARIABLES |
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diff
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|
739 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff
changeset
|
740 /* Switch to supervisor mode */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
741 NU_SUPERVISOR_MODE(); |
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parents:
diff
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|
742 |
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diff
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|
743 /* Move input queue pointer into internal pointer. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
744 queue = (QU_QCB *) queue_ptr; |
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parents:
diff
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|
745 |
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parents:
diff
changeset
|
746 |
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diff
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|
747 #ifdef NU_ENABLE_STACK_CHECK |
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parents:
diff
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|
748 |
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parents:
diff
changeset
|
749 /* Call stack checking function to check for an overflow condition. */ |
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parents:
diff
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|
750 TCT_Check_Stack(); |
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parents:
diff
changeset
|
751 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
752 #endif |
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diff
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|
753 |
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diff
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|
754 #ifdef NU_ENABLE_HISTORY |
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diff
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|
755 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
756 /* Make an entry that corresponds to this function in the system history |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
757 log. */ |
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diff
changeset
|
758 HIC_Make_History_Entry(NU_BROADCAST_TO_QUEUE_ID, (UNSIGNED) queue, |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
759 (UNSIGNED) message, (UNSIGNED) size); |
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parents:
diff
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|
760 |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
761 #endif |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
762 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
763 /* Initialize the status as successful. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
764 status = NU_SUCCESS; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
765 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
766 /* Protect against simultaneous access to the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
767 TCT_System_Protect(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
768 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
769 /* Determine if an extra word of overhead needs to be added to the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
770 calculation. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
771 if (queue -> qu_fixed_size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
772 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
773 /* No overhead. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
774 i = 0; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
775 else |
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 /* Variable messages have one additional word of overhead. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
778 i = 1; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
779 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
780 /* Make special check to see if a suspension needs to be |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
781 forced for a variable length message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
782 if ((queue -> qu_suspension_list) && (queue -> qu_messages)) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
783 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
784 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
785 /* Pickup task control block pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
786 task = (TC_TCB *) TCT_Current_Thread(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
787 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
788 /* Now we know that there are other task(s) are suspended trying |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
789 to send a variable length message. Determine whether or not |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
790 a suspension should be forced. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
791 if ((queue -> qu_fifo_suspend) || |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
792 (suspend == NU_NO_SUSPEND) || |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
793 ((queue -> qu_suspension_list) -> qu_suspend_link.cs_priority <= |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
794 TCC_Task_Priority(task))) |
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 /* Bump the computed size to avoid placing the new variable |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
797 length message ahead of the suspended tasks. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
798 i = (INT) queue -> qu_available; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
799 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
800 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
801 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
802 /* Determine if there is enough room in the queue for the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
803 if (queue -> qu_available < (size + i)) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
804 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
805 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
806 /* Queue does not have room for the message. Determine if |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
807 suspension is required. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
808 if (suspend) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
809 { |
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 /* Suspension is requested. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
812 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
813 /* Increment the number of tasks waiting. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
814 queue -> qu_tasks_waiting++; |
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 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
817 _RTProf_DumpQueue(RT_PROF_BROADCAST_TO_QUEUE,queue,RT_PROF_WAIT); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
818 #endif |
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 /* Setup the suspend block and suspend the calling task. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
821 suspend_ptr = &suspend_block; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
822 suspend_ptr -> qu_queue = queue; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
823 suspend_ptr -> qu_suspend_link.cs_next = NU_NULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
824 suspend_ptr -> qu_suspend_link.cs_previous = NU_NULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
825 suspend_ptr -> qu_message_area = (UNSIGNED_PTR) message; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
826 suspend_ptr -> qu_message_size = size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
827 task = (TC_TCB *) TCT_Current_Thread(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
828 suspend_ptr -> qu_suspended_task = task; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
829 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
830 /* Determine if priority or FIFO suspension is associated with the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
831 queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
832 if (queue -> qu_fifo_suspend) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
833 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
834 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
835 /* FIFO suspension is required. Link the suspend block into |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
836 the list of suspended tasks on this queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
837 CSC_Place_On_List((CS_NODE **) &(queue -> qu_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
838 &(suspend_ptr -> qu_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
839 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
840 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
841 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
842 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
843 /* 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
|
844 can be placed in the appropriate place. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
845 suspend_ptr -> qu_suspend_link.cs_priority = |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
846 TCC_Task_Priority(task); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
847 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
848 CSC_Priority_Place_On_List((CS_NODE **) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
849 &(queue -> qu_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
850 &(suspend_ptr -> qu_suspend_link)); |
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 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
853 /* Finally, suspend the calling task. Note that the suspension call |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
854 automatically clears the protection on the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
855 TCC_Suspend_Task((NU_TASK *) task, NU_QUEUE_SUSPEND, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
856 QUC_Cleanup, suspend_ptr, suspend); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
857 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
858 /* Pickup the return status. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
859 status = suspend_ptr -> qu_return_status; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
860 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
861 else |
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 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
864 /* 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
|
865 room in the queue for the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
866 status = NU_QUEUE_FULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
867 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
868 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
869 _RTProf_DumpQueue(RT_PROF_BROADCAST_TO_QUEUE,queue,RT_PROF_FAIL); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
870 #endif |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
871 |
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 else |
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 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
877 /* Determine if a task is waiting on an empty queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
878 if ((queue -> qu_suspension_list) && (queue -> qu_messages == 0)) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
879 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
880 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
881 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
882 _RTProf_DumpQueue(RT_PROF_BROADCAST_TO_QUEUE,queue,RT_PROF_OK); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
883 #endif |
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 /* Yes, one or more tasks are waiting for a message from this |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
886 queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
887 preempt = 0; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
888 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
889 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
890 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
891 /* Decrement the number of tasks waiting on queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
892 queue -> qu_tasks_waiting--; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
893 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
894 /* Remove the first suspended block from the list. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
895 suspend_ptr = queue -> qu_suspension_list; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
896 CSC_Remove_From_List((CS_NODE **) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
897 &(queue -> qu_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
898 &(suspend_ptr -> qu_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
899 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
900 /* Setup the source and destination pointers. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
901 source = (UNSIGNED_PTR) message; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
902 destination = suspend_ptr -> qu_message_area; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
903 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
904 /* Initialize the return status. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
905 suspend_ptr -> qu_return_status = NU_SUCCESS; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
906 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
907 /* Loop to actually copy the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
908 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
909 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
910 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
911 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
912 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
913 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
914 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
915 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
916 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
917 /* Return the size of the message copied. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
918 suspend_ptr -> qu_actual_size = size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
919 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
920 /* Wakeup the waiting task and check for preemption. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
921 preempt = preempt | |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
922 TCC_Resume_Task((NU_TASK *) suspend_ptr -> qu_suspended_task, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
923 NU_QUEUE_SUSPEND); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
924 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
925 /* Move the suspend pointer to the next node, which is now |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
926 at the head of the list. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
927 suspend_ptr = queue -> qu_suspension_list; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
928 } while (suspend_ptr); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
929 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
930 /* Determine if preemption needs to take place. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
931 if (preempt) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
932 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
933 /* Transfer control to the system if the resumed task function |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
934 detects a preemption condition. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
935 TCT_Control_To_System(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
936 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
937 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
938 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
939 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
940 /* 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
|
941 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
942 /* Setup the source pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
943 source = (UNSIGNED_PTR) message; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
944 destination = queue -> qu_write; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
945 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
946 /* Process according to the type of message supported. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
947 if (queue -> qu_fixed_size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
948 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
949 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
950 /* Fixed-size messages are supported by this queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
951 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
952 /* Loop to copy the message into the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
953 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
954 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
955 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
956 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
957 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
958 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
959 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
960 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
961 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
962 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
963 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
964 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
965 /* Variable-size messages are supported. Processing must |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
966 check for queue wrap-around conditions. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
967 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
968 /* Place message size in first location. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
969 *(destination++) = size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
970 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
971 /* Check for a wrap-around condition on the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
972 if (destination >= queue -> qu_end) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
973 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
974 /* 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
|
975 area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
976 destination = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
977 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
978 /* Decrement the number of words remaining by 1 for this |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
979 extra word of overhead. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
980 queue -> qu_available--; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
981 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
982 /* Calculate the number of words remaining from the write |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
983 pointer to the bottom of the queue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
984 copy_size = queue -> qu_end - destination; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
985 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
986 /* Determine if the message needs to be wrapped around the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
987 edge of the queue area. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
988 if (copy_size >= size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
989 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
990 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
991 /* Copy the whole message at once. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
992 i = (INT) size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
993 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
994 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
995 *(destination++) = *(source); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
996 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
997 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
998 source++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
999 } while(1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1000 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1001 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1002 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1003 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1004 /* Copy the first half of the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1005 i = (INT) copy_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1006 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1007 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1008 *(destination) = *(source++); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1009 if ((--i) == 0) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1010 break; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1011 destination++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1012 } while (1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1013 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1014 /* Copy the second half of the message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1015 destination = queue -> qu_start; |
947b1f473960
beginning of nuc-fw
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1016 i = (INT) (size - copy_size); |
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1017 do |
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1018 { |
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1019 *(destination++) = *(source); |
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1020 if ((--i) == 0) |
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1021 break; |
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1022 source++; |
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1023 } while (1); |
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1024 } |
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1025 } |
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1026 |
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1027 /* Check again for wrap-around condition on the write pointer. */ |
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1028 if (destination >= queue -> qu_end) |
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1029 |
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1030 /* Move the write pointer to the top of the queue area. */ |
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1031 queue -> qu_write = queue -> qu_start; |
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1032 else |
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1033 |
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1034 /* Simply copy the last position of the destination pointer |
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1035 into the write pointer. */ |
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1036 queue -> qu_write = destination; |
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1037 |
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1038 /* Decrement the number of available words. */ |
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1039 queue -> qu_available = queue -> qu_available - size; |
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1040 |
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1041 /* Increment the number of messages in the queue. */ |
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1042 queue -> qu_messages++; |
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1043 |
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1044 #ifdef INCLUDE_PROVIEW |
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1045 _RTProf_DumpQueue(RT_PROF_BROADCAST_TO_QUEUE,queue,RT_PROF_OK); |
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1046 #endif |
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1047 } |
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1048 } |
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1049 |
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1050 /* Release protection against access to the queue. */ |
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1051 TCT_Unprotect(); |
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1052 |
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1053 /* Return to user mode */ |
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1054 NU_USER_MODE(); |
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1055 |
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1056 /* Return the completion status. */ |
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1057 return(status); |
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1058 } |
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1059 |
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1060 |
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1061 |
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1062 |