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annotate src/nucleus/mbs.c @ 48:c56f1d6202f5

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l1_small.c: disable TMS470 assembly for gcc
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 19 Jul 2018 02:56:15 +0000
parents 0f80e1e4dce4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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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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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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71 /* Define internal component function prototypes. */
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73 VOID MBC_Cleanup(VOID *information);
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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 */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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233 /* MBSE_Broadcast_To_Mailbox Broadcast to a mailbox */
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234 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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235 /* CALLS */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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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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Mychaela Falconia <falcon@freecalypso.org>
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240 /* [HIC_Make_History_Entry] Make entry in history log */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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241 /* TCC_Resume_Task Resume a suspended task */
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Mychaela Falconia <falcon@freecalypso.org>
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242 /* TCC_Suspend_Task Suspend calling task */
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Mychaela Falconia <falcon@freecalypso.org>
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243 /* TCC_Task_Priority Priority of specified task */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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244 /* [TCT_Check_Stack] Stack checking function */
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Mychaela Falconia <falcon@freecalypso.org>
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245 /* TCT_Control_To_System Transfer control to system */
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Mychaela Falconia <falcon@freecalypso.org>
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246 /* TCT_Current_Thread Pickup current thread pointer*/
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Mychaela Falconia <falcon@freecalypso.org>
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247 /* TCT_System_Protect Protect mailbox */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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248 /* TCT_Unprotect Release protection */
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249 /* */
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Mychaela Falconia <falcon@freecalypso.org>
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250 /* INPUTS */
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Mychaela Falconia <falcon@freecalypso.org>
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251 /* */
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Mychaela Falconia <falcon@freecalypso.org>
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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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Mychaela Falconia <falcon@freecalypso.org>
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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,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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282 UNSIGNED suspend)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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283 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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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 */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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289 MB_SUSPEND *next_suspend_ptr; /* Get before restarting task*/
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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290 STATUS preempt; /* Preemption flag */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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291 R3 UNSIGNED *source_ptr; /* Pointer to source */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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292 R4 UNSIGNED *destination_ptr; /* Pointer to destination */
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Mychaela Falconia <falcon@freecalypso.org>
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293 TC_TCB *task; /* Task pointer */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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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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Mychaela Falconia <falcon@freecalypso.org>
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297 /* Switch to supervisor mode */
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Mychaela Falconia <falcon@freecalypso.org>
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298 NU_SUPERVISOR_MODE();
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299
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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diff changeset
300 /* Move input mailbox pointer into internal pointer. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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301 mailbox = (MB_MCB *) mailbox_ptr;
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302
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
303
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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diff changeset
304 #ifdef NU_ENABLE_STACK_CHECK
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305
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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306 /* Call stack checking function to check for an overflow condition. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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307 TCT_Check_Stack();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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308
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
309 #endif
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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310
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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diff changeset
311 #ifdef NU_ENABLE_HISTORY
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312
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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313 /* Make an entry that corresponds to this function in the system history
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Mychaela Falconia <falcon@freecalypso.org>
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314 log. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
315 HIC_Make_History_Entry(NU_BROADCAST_TO_MAILBOX_ID, (UNSIGNED) mailbox,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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316 (UNSIGNED) message, (UNSIGNED) suspend);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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317
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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318 #endif
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diff changeset
319
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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320 /* Initialize the status as successful. */
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321 status = NU_SUCCESS;
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322
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
323 /* Protect against simultaneous access to the mailbox. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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324 TCT_System_Protect();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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325
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
326 /* Determine if the mailbox is empty or full. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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327 if (mailbox -> mb_message_present)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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diff changeset
328 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
329
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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330 /* Mailbox already has a message. Determine if suspension is
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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331 required. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
332 if (suspend)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
333 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
334
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
335 /* Suspension is requested. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
336
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
337 /* Increment the number of tasks suspended on the mailbox. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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338 mailbox -> mb_tasks_waiting++;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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339
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
340 #ifdef INCLUDE_PROVIEW
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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341 _RTProf_DumpMailBox(RT_PROF_BROADCAST_TO_MAILBOX,mailbox,RT_PROF_WAIT);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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342 #endif /* INCLUDE_PROVIEW */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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343
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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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
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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353 /* Determine if priority or FIFO suspension is associated with the
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Mychaela Falconia <falcon@freecalypso.org>
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354 mailbox. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
355 if (mailbox -> mb_fifo_suspend)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
356 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
357
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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358 /* FIFO suspension is required. Link the suspend block into
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
359 the list of suspended tasks on this mailbox. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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360 CSC_Place_On_List((CS_NODE **) &(mailbox ->mb_suspension_list),
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
361 &(suspend_ptr -> mb_suspend_link));
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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362 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
363 else
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
364 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
365
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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366 /* Get the priority of the current thread so the suspend block
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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367 can be placed in the appropriate place. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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368 suspend_ptr -> mb_suspend_link.cs_priority =
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
369 TCC_Task_Priority(task);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
370
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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371 CSC_Priority_Place_On_List((CS_NODE **)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
372 &(mailbox -> mb_suspension_list),
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
373 &(suspend_ptr -> mb_suspend_link));
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
374 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
375
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
376 /* Finally, suspend the calling task. Note that the suspension call
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
377 automatically clears the protection on the mailbox. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
378 TCC_Suspend_Task((NU_TASK *) task, NU_MAILBOX_SUSPEND,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
379 MBC_Cleanup, suspend_ptr, suspend);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
380
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
381 /* Pickup the return status. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
382 status = suspend_ptr -> mb_return_status;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
383 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
384 else
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
385 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
386
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
387 /* Return a status of NU_MAILBOX_FULL because there is no
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
388 room in the mailbox for the message. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
389 status = NU_MAILBOX_FULL;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
390
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
391 #ifdef INCLUDE_PROVIEW
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
392 _RTProf_DumpMailBox(RT_PROF_BROADCAST_TO_MAILBOX,mailbox,RT_PROF_FAIL);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
393 #endif /* INCLUDE_PROVIEW */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
394
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
395 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
396 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
397 else
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
398 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
399
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
400 /* Determine if a task is waiting on the mailbox. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
401 if (mailbox -> mb_suspension_list)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
402 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
403
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
404 #ifdef INCLUDE_PROVIEW
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
405 _RTProf_DumpMailBox(RT_PROF_BROADCAST_TO_MAILBOX,mailbox,RT_PROF_OK);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
406 #endif /* INCLUDE_PROVIEW */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
407
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
408 /* At least one task is waiting on mailbox for a message. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
409
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
410 /* Save off the suspension list and and then clear out the
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
411 mailbox suspension. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
412 suspend_head = mailbox -> mb_suspension_list;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
413 mailbox -> mb_suspension_list = NU_NULL;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
414
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
415 /* Loop to wakeup all of the tasks waiting on the mailbox for
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
416 a message. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
417 suspend_ptr = suspend_head;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
418 preempt = 0;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
419 do
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
420 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
421
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
422 /* Setup the source and destination pointers. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
423 source_ptr = (UNSIGNED *) message;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
424 destination_ptr = suspend_ptr -> mb_message_area;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
425
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
426 /* Copy the message directly into the waiting task's
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
427 destination. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
428 *destination_ptr = *source_ptr;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
429 *(destination_ptr + 1) = *(source_ptr + 1);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
430 *(destination_ptr + 2) = *(source_ptr + 2);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
431 *(destination_ptr + 3) = *(source_ptr + 3);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
432
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
433 /* Setup the appropriate return value. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
434 suspend_ptr -> mb_return_status = NU_SUCCESS;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
435
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
436 /* Move the suspend pointer along to the next block. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
437 next_suspend_ptr = (MB_SUSPEND *)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
438 suspend_ptr -> mb_suspend_link.cs_next;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
439
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
440 /* Wakeup each task waiting. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
441 preempt = preempt |
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
442 TCC_Resume_Task((NU_TASK *) suspend_ptr -> mb_suspended_task,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
443 NU_MAILBOX_SUSPEND);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
444 suspend_ptr = next_suspend_ptr;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
445
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
446 } while (suspend_ptr != suspend_head);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
447
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
448 /* Clear the number of tasks waiting counter of the mailbox. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
449 mailbox -> mb_tasks_waiting = 0;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
450
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
451 /* Determine if a preempt condition is present. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
452 if (preempt)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
453
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
454 /* Transfer control to the system if the resumed task function
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
455 detects a preemption condition. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
456 TCT_Control_To_System();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
457 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
458 else
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
459 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
460
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
461 /* Mailbox is empty and no task is waiting. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
462
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
463 /* Setup the source and destination pointers. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
464 source_ptr = (UNSIGNED *) message;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
465 destination_ptr = &(mailbox -> mb_message_area[0]);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
466
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
467 /* Place the message in the mailbox. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
468 *destination_ptr = *source_ptr;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
469 *(destination_ptr + 1) = *(source_ptr + 1);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
470 *(destination_ptr + 2) = *(source_ptr + 2);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
471 *(destination_ptr + 3) = *(source_ptr + 3);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
472
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
473 /* Indicate that the mailbox has a message. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
474 mailbox -> mb_message_present = NU_TRUE;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
475
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
476 #ifdef INCLUDE_PROVIEW
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
477 _RTProf_DumpMailBox(RT_PROF_BROADCAST_TO_MAILBOX,mailbox,RT_PROF_OK);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
478 #endif /* INCLUDE_PROVIEW */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
479 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
480 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
481
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
482 /* Release protection. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
483 TCT_Unprotect();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
484
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
485 /* Return to user mode */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
486 NU_USER_MODE();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
487
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
488 /* Return the completion status. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
489 return(status);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
490 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
491
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
492
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
493
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
494
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
495
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
496