FreeCalypso > hg > freecalypso-sw
annotate gsm-fw/nucleus/mbs.c @ 250:3d88461d8284
beginning of TIFFS IVA documentation
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Fri, 31 Jan 2014 07:37:39 +0000 |
parents | afceeeb2cba1 |
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rev | line source |
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1 /*************************************************************************/ |
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2 /* */ |
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3 /* Copyright Mentor Graphics Corporation 2002 */ |
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4 /* All Rights Reserved. */ |
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5 /* */ |
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6 /* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */ |
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7 /* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */ |
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8 /* SUBJECT TO LICENSE TERMS. */ |
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9 /* */ |
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10 /*************************************************************************/ |
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11 |
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12 /*************************************************************************/ |
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13 /* */ |
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14 /* FILE NAME VERSION */ |
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15 /* */ |
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16 /* mbs.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 /* MB - Mailbox Management */ |
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21 /* */ |
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22 /* DESCRIPTION */ |
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23 /* */ |
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24 /* This file contains the core routines for the Mailbox management */ |
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25 /* component. */ |
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26 /* */ |
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27 /* DATA STRUCTURES */ |
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28 /* */ |
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29 /* None */ |
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30 /* */ |
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31 /* FUNCTIONS */ |
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32 /* */ |
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33 /* MBS_Reset_Mailbox Reset a mailbox */ |
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34 /* MBS_Broadcast_To_Mailbox Broadcast a mailbox message */ |
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35 /* */ |
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36 /* DEPENDENCIES */ |
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37 /* */ |
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38 /* cs_extr.h Common Service functions */ |
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39 /* tc_extr.h Thread Control functions */ |
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40 /* mb_extr.h Mailbox functions */ |
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41 /* hi_extr.h History functions */ |
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42 /* */ |
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43 /* HISTORY */ |
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44 /* */ |
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45 /* DATE REMARKS */ |
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46 /* */ |
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47 /* 03-01-1994 Initial version of supplemental */ |
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48 /* mailbox service file, */ |
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49 /* version 1.1 */ |
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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 /* 03-24-1998 Released version 1.3 */ |
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54 /* 03-26-1999 Released 1.11m (new release */ |
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55 /* numbering scheme) */ |
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56 /* 04-23-2001 Fixed problem with resuming task in */ |
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57 /* MBS_Broadcast_To_Mailbox */ |
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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 "mb_extr.h" /* Mailbox 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 MBC_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 /* MBS_Reset_Mailbox */ |
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81 /* */ |
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82 /* DESCRIPTION */ |
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83 /* */ |
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84 /* This function resets a mailbox back to the initial state. Any */ |
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85 /* message in the mailbox is discarded. Also, all tasks suspended */ |
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86 /* on the mailbox are resumed with the reset completion status. */ |
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87 /* */ |
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88 /* CALLED BY */ |
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89 /* */ |
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90 /* Application */ |
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91 /* MBSE_Reset_Mailbox Error checking shell */ |
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92 /* */ |
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93 /* CALLS */ |
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94 /* */ |
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95 /* [HIC_Make_History_Entry] Make entry in history log */ |
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96 /* TCC_Resume_Task Resume a suspended task */ |
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97 /* [TCT_Check_Stack] Stack checking function */ |
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98 /* TCT_Control_To_System Transfer control to system */ |
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99 /* TCT_System_Protect Protect mailbox */ |
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100 /* TCT_Unprotect Release protection */ |
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101 /* */ |
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102 /* INPUTS */ |
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103 /* */ |
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104 /* mailbox_ptr Mailbox control block pointer*/ |
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105 /* */ |
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106 /* OUTPUTS */ |
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107 /* */ |
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108 /* NU_SUCCESS */ |
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109 /* */ |
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110 /* HISTORY */ |
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111 /* */ |
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112 /* NAME DATE REMARKS */ |
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113 /* */ |
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114 /* 03-01-1993 Created initial version 1.0 */ |
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115 /* 04-19-1993 Verified version 1.0 */ |
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116 /* 03-01-1994 Changed function interface to */ |
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117 /* match the prototype, added */ |
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118 /* register variable logic, */ |
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119 /* optimized protection logic, */ |
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120 /* resulting in version 1.1 */ |
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121 /* */ |
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122 /* 03-18-1994 Verified version 1.1 */ |
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123 /* */ |
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124 /*************************************************************************/ |
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125 STATUS MBS_Reset_Mailbox(NU_MAILBOX *mailbox_ptr) |
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126 { |
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127 |
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128 R1 MB_MCB *mailbox; /* Mailbox control block ptr */ |
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129 R2 MB_SUSPEND *suspend_ptr; /* Suspend block pointer */ |
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130 MB_SUSPEND *next_ptr; /* Next suspend block pointer*/ |
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131 STATUS preempt; /* Status for resume call */ |
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132 NU_SUPERV_USER_VARIABLES |
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133 |
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134 /* Switch to supervisor mode */ |
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135 NU_SUPERVISOR_MODE(); |
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136 |
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137 /* Move input mailbox pointer into internal pointer. */ |
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138 mailbox = (MB_MCB *) mailbox_ptr; |
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139 |
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140 |
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141 #ifdef NU_ENABLE_STACK_CHECK |
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142 |
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143 /* Call stack checking function to check for an overflow condition. */ |
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144 TCT_Check_Stack(); |
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145 |
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146 #endif |
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147 |
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148 #ifdef NU_ENABLE_HISTORY |
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149 |
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150 /* Make an entry that corresponds to this function in the system history |
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151 log. */ |
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152 HIC_Make_History_Entry(NU_RESET_MAILBOX_ID, (UNSIGNED) mailbox, |
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153 (UNSIGNED) 0, (UNSIGNED) 0); |
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154 |
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155 #endif |
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156 |
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157 /* Protect against access to the mailbox. */ |
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158 TCT_System_Protect(); |
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159 |
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160 /* Pickup the suspended task pointer list. */ |
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161 suspend_ptr = mailbox -> mb_suspension_list; |
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162 |
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163 /* Walk the chain task(s) currently suspended on the mailbox. */ |
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164 preempt = 0; |
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165 while (suspend_ptr) |
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166 { |
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167 |
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168 /* Resume the suspended task. Insure that the status returned is |
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169 NU_MAILBOX_RESET. */ |
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170 suspend_ptr -> mb_return_status = NU_MAILBOX_RESET; |
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171 |
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172 /* Point to the next suspend structure in the link. */ |
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173 next_ptr = (MB_SUSPEND *) (suspend_ptr -> mb_suspend_link.cs_next); |
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174 |
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175 /* Resume the specified task. */ |
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176 preempt = preempt | |
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177 TCC_Resume_Task((NU_TASK *) suspend_ptr -> mb_suspended_task, |
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178 NU_MAILBOX_SUSPEND); |
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179 |
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180 /* Determine if the next is the same as the head pointer. */ |
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181 if (next_ptr == mailbox -> mb_suspension_list) |
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182 |
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183 /* Clear the suspension pointer to signal the end of the list |
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184 traversal. */ |
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185 suspend_ptr = NU_NULL; |
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186 else |
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187 |
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188 /* Position the suspend pointer to the next suspend block. */ |
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189 suspend_ptr = next_ptr; |
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190 } |
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191 |
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192 /* Initialize the mailbox. */ |
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193 mailbox -> mb_message_present = NU_FALSE; |
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194 mailbox -> mb_tasks_waiting = 0; |
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195 mailbox -> mb_suspension_list = NU_NULL; |
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196 |
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197 #ifdef INCLUDE_PROVIEW |
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198 _RTProf_DumpMailBox(RT_PROF_RESET_MAILBOX,mailbox,RT_PROF_OK); |
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199 #endif /* INCLUDE_PROVIEW */ |
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200 |
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201 /* Determine if preemption needs to occur. */ |
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202 if (preempt) |
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203 |
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204 /* Transfer control to system to facilitate preemption. */ |
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205 TCT_Control_To_System(); |
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206 |
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207 /* Release protection. */ |
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208 TCT_Unprotect(); |
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209 |
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210 /* Return to user mode */ |
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211 NU_USER_MODE(); |
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212 |
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213 /* Return a successful completion. */ |
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214 return(NU_SUCCESS); |
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215 } |
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216 |
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217 |
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218 /*************************************************************************/ |
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219 /* */ |
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220 /* FUNCTION */ |
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221 /* */ |
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222 /* MBS_Broadcast_To_Mailbox */ |
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223 /* */ |
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224 /* DESCRIPTION */ |
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225 /* */ |
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226 /* This function sends a message to all tasks currently waiting for */ |
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227 /* a message from the mailbox. If no tasks are waiting, this */ |
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228 /* service behaves like a normal send message. */ |
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229 /* */ |
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230 /* CALLED BY */ |
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231 /* */ |
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232 /* Application */ |
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233 /* MBSE_Broadcast_To_Mailbox Broadcast to a mailbox */ |
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234 /* */ |
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235 /* CALLS */ |
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236 /* */ |
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237 /* CSC_Place_On_List Place on suspend list */ |
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238 /* CSC_Priority_Place_On_List Place on priority list */ |
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239 /* CSC_Remove_From_List Remove from suspend list */ |
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240 /* [HIC_Make_History_Entry] Make entry in history log */ |
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241 /* TCC_Resume_Task Resume a suspended task */ |
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242 /* TCC_Suspend_Task Suspend calling task */ |
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243 /* TCC_Task_Priority Priority of specified task */ |
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244 /* [TCT_Check_Stack] Stack checking function */ |
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245 /* TCT_Control_To_System Transfer control to system */ |
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246 /* TCT_Current_Thread Pickup current thread pointer*/ |
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247 /* TCT_System_Protect Protect mailbox */ |
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248 /* TCT_Unprotect Release protection */ |
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249 /* */ |
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250 /* INPUTS */ |
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251 /* */ |
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252 /* mailbox_ptr Mailbox control block pointer*/ |
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253 /* message Pointer to message to send */ |
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254 /* suspend Suspension option if full */ |
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255 /* */ |
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256 /* OUTPUTS */ |
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257 /* */ |
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258 /* NU_SUCCESS If service is successful */ |
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259 /* NU_MAILBOX_FULL If mailbox is currently full */ |
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260 /* NU_TIMEOUT If timeout on service expires*/ |
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261 /* NU_MAILBOX_DELETED If mailbox is deleted during */ |
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262 /* suspension */ |
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263 /* NU_MAILBOX_RESET If mailbox is deleted during */ |
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264 /* suspension */ |
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265 /* */ |
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266 /* HISTORY */ |
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267 /* */ |
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268 /* DATE REMARKS */ |
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269 /* */ |
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270 /* 03-01-1993 Created initial version 1.0 */ |
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271 /* 04-19-1993 Verified version 1.0 */ |
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272 /* 03-01-1994 Changed function interface to */ |
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273 /* match the prototype, added */ |
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274 /* register variable logic, */ |
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275 /* optimized protection logic, */ |
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276 /* resulting in version 1.1 */ |
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277 /* */ |
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278 /* 03-18-1994 Verified version 1.1 */ |
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279 /* */ |
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280 /*************************************************************************/ |
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281 STATUS MBS_Broadcast_To_Mailbox(NU_MAILBOX *mailbox_ptr, VOID *message, |
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282 UNSIGNED suspend) |
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283 { |
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284 |
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285 R1 MB_MCB *mailbox; /* Mailbox control block ptr */ |
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286 MB_SUSPEND suspend_block; /* Allocate suspension block */ |
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287 R2 MB_SUSPEND *suspend_ptr; /* Pointer to suspend block */ |
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288 MB_SUSPEND *suspend_head; /* Pointer to suspend head */ |
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289 MB_SUSPEND *next_suspend_ptr; /* Get before restarting task*/ |
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290 STATUS preempt; /* Preemption flag */ |
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291 R3 UNSIGNED *source_ptr; /* Pointer to source */ |
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292 R4 UNSIGNED *destination_ptr; /* Pointer to destination */ |
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293 TC_TCB *task; /* Task pointer */ |
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294 STATUS status; /* Completion status */ |
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295 NU_SUPERV_USER_VARIABLES |
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296 |
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297 /* Switch to supervisor mode */ |
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298 NU_SUPERVISOR_MODE(); |
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299 |
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300 /* Move input mailbox pointer into internal pointer. */ |
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301 mailbox = (MB_MCB *) mailbox_ptr; |
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302 |
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303 |
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304 #ifdef NU_ENABLE_STACK_CHECK |
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305 |
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306 /* Call stack checking function to check for an overflow condition. */ |
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307 TCT_Check_Stack(); |
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308 |
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309 #endif |
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310 |
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311 #ifdef NU_ENABLE_HISTORY |
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312 |
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313 /* Make an entry that corresponds to this function in the system history |
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314 log. */ |
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315 HIC_Make_History_Entry(NU_BROADCAST_TO_MAILBOX_ID, (UNSIGNED) mailbox, |
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316 (UNSIGNED) message, (UNSIGNED) suspend); |
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317 |
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318 #endif |
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319 |
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320 /* Initialize the status as successful. */ |
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321 status = NU_SUCCESS; |
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322 |
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323 /* Protect against simultaneous access to the mailbox. */ |
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324 TCT_System_Protect(); |
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325 |
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326 /* Determine if the mailbox is empty or full. */ |
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327 if (mailbox -> mb_message_present) |
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328 { |
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329 |
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330 /* Mailbox already has a message. Determine if suspension is |
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331 required. */ |
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332 if (suspend) |
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333 { |
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334 |
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335 /* Suspension is requested. */ |
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336 |
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337 /* Increment the number of tasks suspended on the mailbox. */ |
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338 mailbox -> mb_tasks_waiting++; |
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339 |
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340 #ifdef INCLUDE_PROVIEW |
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341 _RTProf_DumpMailBox(RT_PROF_BROADCAST_TO_MAILBOX,mailbox,RT_PROF_WAIT); |
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342 #endif /* INCLUDE_PROVIEW */ |
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343 |
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344 /* Setup the suspend block and suspend the calling task. */ |
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345 suspend_ptr = &suspend_block; |
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346 suspend_ptr -> mb_mailbox = mailbox; |
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347 suspend_ptr -> mb_suspend_link.cs_next = NU_NULL; |
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348 suspend_ptr -> mb_suspend_link.cs_previous = NU_NULL; |
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349 suspend_ptr -> mb_message_area = (UNSIGNED *) message; |
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350 task = (TC_TCB *) TCT_Current_Thread(); |
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351 suspend_ptr -> mb_suspended_task = task; |
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352 |
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353 /* Determine if priority or FIFO suspension is associated with the |
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354 mailbox. */ |
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355 if (mailbox -> mb_fifo_suspend) |
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356 { |
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357 |
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358 /* FIFO suspension is required. Link the suspend block into |
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359 the list of suspended tasks on this mailbox. */ |
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360 CSC_Place_On_List((CS_NODE **) &(mailbox ->mb_suspension_list), |
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361 &(suspend_ptr -> mb_suspend_link)); |
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362 } |
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363 else |
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364 { |
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365 |
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366 /* Get the priority of the current thread so the suspend block |
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367 can be placed in the appropriate place. */ |
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368 suspend_ptr -> mb_suspend_link.cs_priority = |
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369 TCC_Task_Priority(task); |
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370 |
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371 CSC_Priority_Place_On_List((CS_NODE **) |
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372 &(mailbox -> mb_suspension_list), |
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373 &(suspend_ptr -> mb_suspend_link)); |
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374 } |
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375 |
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376 /* Finally, suspend the calling task. Note that the suspension call |
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377 automatically clears the protection on the mailbox. */ |
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|
378 TCC_Suspend_Task((NU_TASK *) task, NU_MAILBOX_SUSPEND, |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
379 MBC_Cleanup, suspend_ptr, suspend); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
380 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
381 /* Pickup the return status. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
382 status = suspend_ptr -> mb_return_status; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
383 } |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
384 else |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
385 { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
386 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
387 /* Return a status of NU_MAILBOX_FULL because there is no |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
388 room in the mailbox for the message. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
389 status = NU_MAILBOX_FULL; |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
390 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
391 #ifdef INCLUDE_PROVIEW |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
392 _RTProf_DumpMailBox(RT_PROF_BROADCAST_TO_MAILBOX,mailbox,RT_PROF_FAIL); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
393 #endif /* INCLUDE_PROVIEW */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
394 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
395 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
396 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
397 else |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
398 { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
399 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
400 /* Determine if a task is waiting on the mailbox. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
401 if (mailbox -> mb_suspension_list) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
402 { |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
403 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
404 #ifdef INCLUDE_PROVIEW |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
405 _RTProf_DumpMailBox(RT_PROF_BROADCAST_TO_MAILBOX,mailbox,RT_PROF_OK); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
406 #endif /* INCLUDE_PROVIEW */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
407 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
408 /* At least one task is waiting on mailbox for a message. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
409 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
410 /* Save off the suspension list and and then clear out the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
411 mailbox suspension. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
412 suspend_head = mailbox -> mb_suspension_list; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
413 mailbox -> mb_suspension_list = NU_NULL; |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
414 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
415 /* Loop to wakeup all of the tasks waiting on the mailbox for |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
416 a message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
417 suspend_ptr = suspend_head; |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
418 preempt = 0; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
419 do |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
420 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
421 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
422 /* Setup the source and destination pointers. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
423 source_ptr = (UNSIGNED *) message; |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
424 destination_ptr = suspend_ptr -> mb_message_area; |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
425 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
426 /* Copy the message directly into the waiting task's |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
427 destination. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
428 *destination_ptr = *source_ptr; |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
429 *(destination_ptr + 1) = *(source_ptr + 1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
430 *(destination_ptr + 2) = *(source_ptr + 2); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
431 *(destination_ptr + 3) = *(source_ptr + 3); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
432 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
433 /* Setup the appropriate return value. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
434 suspend_ptr -> mb_return_status = NU_SUCCESS; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
435 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
436 /* Move the suspend pointer along to the next block. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
437 next_suspend_ptr = (MB_SUSPEND *) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
438 suspend_ptr -> mb_suspend_link.cs_next; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
439 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
440 /* Wakeup each task waiting. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
441 preempt = preempt | |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
442 TCC_Resume_Task((NU_TASK *) suspend_ptr -> mb_suspended_task, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
443 NU_MAILBOX_SUSPEND); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
444 suspend_ptr = next_suspend_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
445 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
446 } while (suspend_ptr != suspend_head); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
447 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
448 /* Clear the number of tasks waiting counter of the mailbox. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
449 mailbox -> mb_tasks_waiting = 0; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
450 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
451 /* Determine if a preempt condition is present. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
452 if (preempt) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
453 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
454 /* Transfer control to the system if the resumed task function |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
455 detects a preemption condition. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
456 TCT_Control_To_System(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
457 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
458 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
459 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
460 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
461 /* Mailbox is empty and no task is waiting. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
462 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
463 /* Setup the source and destination pointers. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
464 source_ptr = (UNSIGNED *) message; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
465 destination_ptr = &(mailbox -> mb_message_area[0]); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
466 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
467 /* Place the message in the mailbox. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
468 *destination_ptr = *source_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
469 *(destination_ptr + 1) = *(source_ptr + 1); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
470 *(destination_ptr + 2) = *(source_ptr + 2); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
471 *(destination_ptr + 3) = *(source_ptr + 3); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
472 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
473 /* Indicate that the mailbox has a message. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
474 mailbox -> mb_message_present = NU_TRUE; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
475 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
476 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
477 _RTProf_DumpMailBox(RT_PROF_BROADCAST_TO_MAILBOX,mailbox,RT_PROF_OK); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
478 #endif /* INCLUDE_PROVIEW */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
479 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
480 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
481 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
482 /* Release protection. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
483 TCT_Unprotect(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
484 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
485 /* Return to user mode */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
486 NU_USER_MODE(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
487 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
488 /* Return the completion status. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
489 return(status); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
490 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
491 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
492 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
493 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
494 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
495 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
496 |