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annotate src/nucleus/pif.c @ 147:0d96c28dedb1

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src/cs/layer1/include/l1_const.h: BIG_SMALL_SLEEP added
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 06 Feb 2019 23:00:51 +0000
parents 0f80e1e4dce4
children
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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 /* pif.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 /* PI - Pipe 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 routines to obtain facts about the Pipe */
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25 /* management component. */
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26 /* */
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27 /* DATA STRUCTURES */
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28 /* */
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29 /* None */
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30 /* */
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31 /* FUNCTIONS */
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32 /* */
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33 /* PIF_Established_Pipes Number of created pipes */
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34 /* PIF_Pipe_Information Retrieve pipe information */
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35 /* PIF_Pipe_Pointers Build pipe pointer list */
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36 /* */
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37 /* DEPENDENCIES */
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38 /* */
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39 /* cs_extr.h Common Service functions */
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40 /* tc_extr.h Thread Control functions */
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41 /* pi_extr.h Pipe functions */
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42 /* hi_extr.h History functions */
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43 /* */
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44 /* HISTORY */
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45 /* */
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46 /* DATE REMARKS */
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47 /* */
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48 /* 03-01-1994 Initial version of pipe fact */
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49 /* service file, 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 /* 11-18-1996 Protected Informational service */
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54 /* from NULL Control Block pointers */
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55 /* creating 1.2a. (SPR220) */
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56 /* 03-24-1998 Released version 1.3 */
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57 /* 03-26-1999 Released 1.11m (new release */
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58 /* numbering scheme) */
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59 /* 04-17-2002 Released version 1.13m */
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60 /* 11-07-2002 Released version 1.14 */
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61 /*************************************************************************/
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62 #define NU_SOURCE_FILE
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65 #include "cs_extr.h" /* Common service functions */
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66 #include "tc_extr.h" /* Thread control functions */
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67 #include "pi_extr.h" /* Pipe functions */
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68 #include "hi_extr.h" /* History functions */
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71 /* Define external inner-component global data references. */
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72
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73 extern CS_NODE *PID_Created_Pipes_List;
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74 extern UNSIGNED PID_Total_Pipes;
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75 extern TC_PROTECT PID_List_Protect;
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79 /*************************************************************************/
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80 /* */
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81 /* FUNCTION */
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82 /* */
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83 /* PIF_Established_Pipes */
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84 /* */
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85 /* DESCRIPTION */
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86 /* */
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87 /* This function returns the current number of established */
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88 /* pipes. Pipes previously deleted are no longer considered */
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89 /* established. */
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90 /* */
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91 /* CALLED BY */
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92 /* */
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93 /* Application */
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94 /* */
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95 /* CALLS */
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96 /* */
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97 /* [TCT_Check_Stack] Stack checking function */
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98 /* */
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99 /* INPUTS */
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100 /* */
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101 /* None */
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102 /* */
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103 /* OUTPUTS */
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104 /* */
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105 /* PID_Total_Pipes Number of established */
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106 /* pipes */
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107 /* */
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108 /* HISTORY */
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109 /* */
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110 /* DATE REMARKS */
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111 /* */
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112 /* 03-01-1993 Created initial version 1.0 */
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113 /* 04-19-1993 Verified version 1.0 */
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114 /* 03-01-1994 Modified function interface, */
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115 /* resulting in version 1.1 */
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116 /* */
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117 /* 03-18-1994 Verified version 1.1 */
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118 /* */
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119 /*************************************************************************/
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120 UNSIGNED PIF_Established_Pipes(VOID)
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121 {
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122
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123
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124 #ifdef NU_ENABLE_STACK_CHECK
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125
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126 /* Call stack checking function to check for an overflow condition. */
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127 TCT_Check_Stack();
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128
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129 #endif
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130
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131 /* Return the number of established pipes. */
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132 return(PID_Total_Pipes);
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133 }
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134
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135
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136 /*************************************************************************/
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137 /* */
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138 /* FUNCTION */
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139 /* */
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140 /* PIF_Pipe_Pointers */
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141 /* */
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142 /* DESCRIPTION */
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143 /* */
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144 /* This function builds a list of pipe pointers, starting at the */
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145 /* specified location. The number of pipe pointers placed in the */
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146 /* list is equivalent to the total number of pipes or the maximum */
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147 /* number of pointers specified in the call. */
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148 /* */
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149 /* CALLED BY */
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150 /* */
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151 /* Application */
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152 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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153 /* CALLS */
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154 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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155 /* [TCT_Check_Stack] Stack checking function */
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156 /* TCT_Protect Protect created list */
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157 /* TCT_Unprotect Release protection */
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158 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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159 /* INPUTS */
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160 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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161 /* pointer_list Pointer to the list area */
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162 /* maximum_pointers Maximum number of pointers */
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163 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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164 /* OUTPUTS */
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165 /* */
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166 /* pointers Number of pipe pointers */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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167 /* placed in the list */
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168 /* HISTORY */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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169 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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170 /* DATE REMARKS */
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171 /* */
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172 /* 03-01-1993 Created initial version 1.0 */
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173 /* 04-19-1993 Verified version 1.0 */
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174 /* 08-09-1993 Corrected pointer retrieval */
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175 /* loop, resulting in version 1.0a */
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176 /* 08-09-1993 Verified version 1.0a */
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177 /* 03-01-1994 Modified function interface, */
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178 /* resulting in version 1.1 */
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179 /* */
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180 /* 03-18-1994 Verified version 1.1 */
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181 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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182 /*************************************************************************/
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183 UNSIGNED PIF_Pipe_Pointers(NU_PIPE **pointer_list,UNSIGNED maximum_pointers)
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184 {
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185
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186 CS_NODE *node_ptr; /* Pointer to each QCB */
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187 UNSIGNED pointers; /* Number of pointers in list*/
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188 NU_SUPERV_USER_VARIABLES
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189
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190 /* Switch to supervisor mode */
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191 NU_SUPERVISOR_MODE();
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192
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193 #ifdef NU_ENABLE_STACK_CHECK
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194
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195 /* Call stack checking function to check for an overflow condition. */
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196 TCT_Check_Stack();
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197
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198 #endif
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199
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200 /* Initialize the number of pointers returned. */
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201 pointers = 0;
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202
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203 /* Protect against access to the list of created pipes. */
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204 TCT_Protect(&PID_List_Protect);
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205
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206 /* Loop until all pipe pointers are in the list or until the maximum
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207 list size is reached. */
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208 node_ptr = PID_Created_Pipes_List;
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209 while ((node_ptr) && (pointers < maximum_pointers))
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210 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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211
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212 /* Place the node into the destination list. */
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213 *pointer_list++ = (NU_PIPE *) node_ptr;
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214
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215 /* Increment the pointers variable. */
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216 pointers++;
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217
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218 /* Position the node pointer to the next node. */
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219 node_ptr = node_ptr -> cs_next;
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220
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221 /* Determine if the pointer is at the head of the list. */
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222 if (node_ptr == PID_Created_Pipes_List)
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223
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224 /* The list search is complete. */
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225 node_ptr = NU_NULL;
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226 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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227
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228 /* Release protection against access to the list of created pipes. */
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229 TCT_Unprotect();
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230
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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231 /* Return to user mode */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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232 NU_USER_MODE();
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233
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234 /* Return the number of pointers in the list. */
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235 return(pointers);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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236 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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237
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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238
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239 /*************************************************************************/
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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240 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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241 /* FUNCTION */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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242 /* */
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243 /* PIF_Pipe_Information */
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244 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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245 /* DESCRIPTION */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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246 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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247 /* This function returns information about the specified pipe. */
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248 /* However, if the supplied pipe pointer is invalid, the */
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249 /* function simply returns an error status. */
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250 /* */
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251 /* CALLED BY */
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Mychaela Falconia <falcon@freecalypso.org>
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252 /* */
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253 /* Application */
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Mychaela Falconia <falcon@freecalypso.org>
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254 /* */
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Mychaela Falconia <falcon@freecalypso.org>
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255 /* CALLS */
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Mychaela Falconia <falcon@freecalypso.org>
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256 /* */
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Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
257 /* [TCT_Check_Stack] Stack checking function */
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258 /* TCT_System_Protect Protect pipe */
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259 /* TCT_Unprotect Release protection */
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260 /* */
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261 /* INPUTS */
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Mychaela Falconia <falcon@freecalypso.org>
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262 /* */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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263 /* pipe_ptr Pointer to the pipe */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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264 /* name Destination for the name */
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265 /* start_address Destination for the start */
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266 /* address of the pipe */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267 /* pipe_size Destination for pipe size */
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268 /* available Destination for available */
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Mychaela Falconia <falcon@freecalypso.org>
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269 /* room in pipe */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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270 /* messages Destination for number of */
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271 /* messages piped */
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272 /* message_type Destination for message type */
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273 /* message_size Destination for message size */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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274 /* suspend_type Destination for suspension */
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275 /* type */
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Mychaela Falconia <falcon@freecalypso.org>
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276 /* tasks_waiting Destination for the tasks */
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Mychaela Falconia <falcon@freecalypso.org>
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277 /* waiting count */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 /* first_task Destination for the pointer */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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279 /* to the first task waiting */
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280 /* */
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Mychaela Falconia <falcon@freecalypso.org>
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281 /* OUTPUTS */
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Mychaela Falconia <falcon@freecalypso.org>
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282 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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283 /* NU_SUCCESS If a valid pipe pointer */
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284 /* is supplied */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285 /* NU_INVALID_PIPE If pipe pointer invalid */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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286 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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287 /* HISTORY */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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288 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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289 /* DATE REMARKS */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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290 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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291 /* 03-01-1993 Created initial version 1.0 */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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292 /* 04-19-1993 Verified version 1.0 */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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293 /* 03-01-1994 Modified function interface, */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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294 /* resulting in version 1.1 */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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295 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296 /* 03-18-1994 Verified version 1.1 */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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297 /* 11-18-1996 Corrected SPR220 */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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298 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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299 /*************************************************************************/
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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300 STATUS PIF_Pipe_Information(NU_PIPE *pipe_ptr, CHAR *name,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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301 VOID **start_address, UNSIGNED *pipe_size,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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302 UNSIGNED *available, UNSIGNED *messages,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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303 OPTION *message_type, UNSIGNED *message_size,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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304 OPTION *suspend_type, UNSIGNED *tasks_waiting,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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305 NU_TASK **first_task)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
306 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
307
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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308 PI_PCB *pipe; /* Pipe control block ptr */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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309 INT i; /* Working integer variable */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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310 STATUS completion; /* Completion status */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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311 NU_SUPERV_USER_VARIABLES
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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312
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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313 /* Switch to supervisor mode */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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314 NU_SUPERVISOR_MODE();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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315
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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316 /* Move input pipe pointer into internal pointer. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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317 pipe = (PI_PCB *) pipe_ptr;
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318
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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319
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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320 #ifdef NU_ENABLE_STACK_CHECK
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321
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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322 /* 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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323 TCT_Check_Stack();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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324
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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325 #endif
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
326
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
327 /* Determine if this pipe id is valid. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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328 if ((pipe != NU_NULL) && (pipe -> pi_id == PI_PIPE_ID))
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
329 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
330
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 /* Setup protection of the pipe. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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332 TCT_System_Protect();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
333
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
334 /* The pipe pointer is valid. Reflect this in the completion
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
335 status and fill in the actual information. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
336 completion = NU_SUCCESS;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
337
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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338 /* Copy the pipe's name. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
339 for (i = 0; i < NU_MAX_NAME; i++)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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340 *name++ = pipe -> pi_name[i];
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
341
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
342 /* Determine the suspension type. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
343 if (pipe -> pi_fifo_suspend)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
344 *suspend_type = NU_FIFO;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
345 else
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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346 *suspend_type = NU_PRIORITY;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
347
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
348 /* Determine the message type. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
349 if (pipe -> pi_fixed_size)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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350 *message_type = NU_FIXED_SIZE;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
351 else
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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352 *message_type = NU_VARIABLE_SIZE;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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353
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
354 /* Get various information about the pipe. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
355 *start_address = (VOID *) pipe -> pi_start;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
356 *pipe_size = pipe -> pi_pipe_size;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
357 *available = pipe -> pi_available;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
358 *messages = pipe -> pi_messages;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
359 *message_size = pipe -> pi_message_size;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
360
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
361 /* Retrieve the number of tasks waiting and the pointer to the
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
362 first task waiting. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
363 *tasks_waiting = pipe -> pi_tasks_waiting;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
364 if (pipe -> pi_suspension_list)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
365
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
366 /* There is a task waiting. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
367 *first_task = (NU_TASK *)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
368 (pipe -> pi_suspension_list) -> pi_suspended_task;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
369 else
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
370
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
371 /* There are no tasks waiting. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
372 *first_task = NU_NULL;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
373
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
374 /* Release protection of the pipe. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
375 TCT_Unprotect();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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376 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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377 else
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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378
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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379 /* Indicate that the pipe pointer is invalid. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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380 completion = NU_INVALID_PIPE;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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381
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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382 /* Return to user mode */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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383 NU_USER_MODE();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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384
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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385 /* Return the appropriate completion status. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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386 return(completion);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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387 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
388
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
389
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
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
392
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
393