annotate src/nucleus/smf.c @ 94:e5cbc745543b

gcc/makefile-body: a few fixes
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 21 Jul 2018 01:03:53 +0000
parents 0f80e1e4dce4
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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 /* smf.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 /* SM - Semaphore 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 Semaphore */
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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 /* SMF_Established_Semaphores Number of created semaphores */
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34 /* SMF_Semaphore_Pointers Build semaphore pointer list */
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35 /* SMF_Semaphore_Information Retrieve semaphore info */
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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 /* sm_extr.h Semaphore 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 semaphore */
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49 /* fact 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 "sm_extr.h" /* Semaphore 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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73 extern CS_NODE *SMD_Created_Semaphores_List;
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74 extern UNSIGNED SMD_Total_Semaphores;
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75 extern TC_PROTECT SMD_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 /* SMF_Established_Semaphores */
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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 /* semaphores. Semaphores previously deleted are no longer */
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89 /* considered 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 /* SMD_Total_Semaphores Number of established */
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106 /* semaphores */
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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 SMF_Established_Semaphores(VOID)
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121 {
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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 semaphores. */
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132 return(SMD_Total_Semaphores);
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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 /* SMF_Semaphore_Pointers */
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141 /* */
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142 /* DESCRIPTION */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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143 /* */
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144 /* This function builds a list of semaphore pointers, starting at */
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145 /* the specified location. The number of semaphore pointers */
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146 /* placed in the list is equivalent to the total number of */
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147 /* semaphores or the maximum number of pointers specified in the */
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148 /* call. */
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149 /* */
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150 /* CALLED BY */
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151 /* */
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152 /* Application */
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153 /* */
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154 /* CALLS */
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155 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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156 /* [TCT_Check_Stack] Stack checking function */
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Mychaela Falconia <falcon@freecalypso.org>
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157 /* TCT_Protect Protect created list */
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Mychaela Falconia <falcon@freecalypso.org>
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158 /* TCT_Unprotect Release protection */
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159 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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160 /* INPUTS */
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Mychaela Falconia <falcon@freecalypso.org>
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161 /* */
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Mychaela Falconia <falcon@freecalypso.org>
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162 /* pointer_list Pointer to the list area */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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163 /* maximum_pointers Maximum number of pointers */
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164 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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165 /* OUTPUTS */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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166 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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167 /* pointers Number of semaphores placed */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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168 /* in the list */
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Mychaela Falconia <falcon@freecalypso.org>
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169 /* HISTORY */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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170 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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171 /* DATE REMARKS */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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172 /* */
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173 /* 03-01-1993 Created initial version 1.0 */
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174 /* 04-19-1993 Verified version 1.0 */
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175 /* 08-09-1993 Corrected pointer retrieval */
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Mychaela Falconia <falcon@freecalypso.org>
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176 /* loop, resulting in version 1.0a */
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Mychaela Falconia <falcon@freecalypso.org>
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177 /* 08-09-1993 Verified version 1.0a */
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Mychaela Falconia <falcon@freecalypso.org>
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178 /* 03-01-1994 Modified function interface, */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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179 /* resulting in version 1.1 */
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180 /* */
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Mychaela Falconia <falcon@freecalypso.org>
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181 /* 03-18-1994 Verified version 1.1 */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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182 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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183 /*************************************************************************/
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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184 UNSIGNED SMF_Semaphore_Pointers(NU_SEMAPHORE **pointer_list,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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185 UNSIGNED maximum_pointers)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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186 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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187 CS_NODE *node_ptr; /* Pointer to each SMB */
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Mychaela Falconia <falcon@freecalypso.org>
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188 UNSIGNED pointers; /* Number of pointers in list*/
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Mychaela Falconia <falcon@freecalypso.org>
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189 NU_SUPERV_USER_VARIABLES
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190
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191 /* Switch to supervisor mode */
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192 NU_SUPERVISOR_MODE();
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193
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194 #ifdef NU_ENABLE_STACK_CHECK
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195
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196 /* Call stack checking function to check for an overflow condition. */
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197 TCT_Check_Stack();
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198
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199 #endif
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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200
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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201 /* Initialize the number of pointers returned. */
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202 pointers = 0;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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203
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204 /* Protect against access to the list of created semaphores. */
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Mychaela Falconia <falcon@freecalypso.org>
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205 TCT_Protect(&SMD_List_Protect);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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206
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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207 /* Loop until all semaphore pointers are in the list or until the maximum
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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208 list size is reached. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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209 node_ptr = SMD_Created_Semaphores_List;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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210 while ((node_ptr) && (pointers < maximum_pointers))
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211 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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212
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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213 /* Place the node into the destination list. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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214 *pointer_list++ = (NU_SEMAPHORE *) node_ptr;
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215
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216 /* Increment the pointers variable. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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217 pointers++;
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Mychaela Falconia <falcon@freecalypso.org>
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218
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219 /* Position the node pointer to the next node. */
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220 node_ptr = node_ptr -> cs_next;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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221
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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222 /* Determine if the pointer is at the head of the list. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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223 if (node_ptr == SMD_Created_Semaphores_List)
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224
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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225 /* The list search is complete. */
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226 node_ptr = NU_NULL;
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227 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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228
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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229 /* Release protection against access to the list of created semaphores. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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230 TCT_Unprotect();
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Mychaela Falconia <falcon@freecalypso.org>
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231
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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232 /* Return to user mode */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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233 NU_USER_MODE();
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Mychaela Falconia <falcon@freecalypso.org>
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234
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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235 /* Return the number of pointers in the list. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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236 return(pointers);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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237 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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238
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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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
Mychaela Falconia <falcon@freecalypso.org>
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241 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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242 /* FUNCTION */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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243 /* */
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244 /* SMF_Semaphore_Information */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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245 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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246 /* DESCRIPTION */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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247 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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248 /* This function returns information about the specified semaphore. */
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249 /* However, if the supplied semaphore pointer is invalid, the */
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250 /* function simply returns an error status. */
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Mychaela Falconia <falcon@freecalypso.org>
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251 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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252 /* CALLED BY */
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253 /* */
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Mychaela Falconia <falcon@freecalypso.org>
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254 /* Application */
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Mychaela Falconia <falcon@freecalypso.org>
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255 /* */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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256 /* CALLS */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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257 /* */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 /* [TCT_Check_Stack] Stack checking function */
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Mychaela Falconia <falcon@freecalypso.org>
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259 /* TCT_System_Protect Protect semaphore */
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260 /* TCT_Unprotect Release protection */
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261 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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262 /* INPUTS */
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Mychaela Falconia <falcon@freecalypso.org>
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263 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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264 /* semaphore_ptr Pointer to the semaphore */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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265 /* name Destination for the name */
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Mychaela Falconia <falcon@freecalypso.org>
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266 /* current_count Destination for semaphore */
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267 /* instance count */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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268 /* suspend_type Destination for the type of */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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269 /* suspension */
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Mychaela Falconia <falcon@freecalypso.org>
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270 /* tasks_waiting Destination for the tasks */
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271 /* waiting count */
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Mychaela Falconia <falcon@freecalypso.org>
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272 /* first_task Destination for the pointer */
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273 /* to the first task waiting */
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274 /* */
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275 /* OUTPUTS */
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Mychaela Falconia <falcon@freecalypso.org>
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276 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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277 /* NU_SUCCESS If a valid semaphore pointer */
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278 /* is supplied */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 /* NU_INVALID_SEMAPHORE If semaphore pointer invalid */
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280 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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281 /* HISTORY */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
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 /* DATE REMARKS */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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284 /* */
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Mychaela Falconia <falcon@freecalypso.org>
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285 /* 03-01-1993 Created initial version 1.0 */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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286 /* 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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287 /* 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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288 /* resulting in version 1.1 */
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Mychaela Falconia <falcon@freecalypso.org>
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289 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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290 /* 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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291 /* 11-18-1996 Corrected SPR220. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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292 /* */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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293 /*************************************************************************/
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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294 STATUS SMF_Semaphore_Information(NU_SEMAPHORE *semaphore_ptr, CHAR *name,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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295 UNSIGNED *current_count, OPTION *suspend_type,
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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296 UNSIGNED *tasks_waiting, NU_TASK **first_task)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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297 {
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 SM_SCB *semaphore; /* Semaphore control blk ptr */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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300 INT i; /* Working integer variable */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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301 STATUS completion; /* Completion status */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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302 NU_SUPERV_USER_VARIABLES
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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303
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
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304 /* Switch to supervisor mode */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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305 NU_SUPERVISOR_MODE();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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306
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
307 /* Move input semaphore pointer into internal pointer. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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308 semaphore = (SM_SCB *) semaphore_ptr;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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309
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
311 #ifdef NU_ENABLE_STACK_CHECK
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 /* 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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314 TCT_Check_Stack();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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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 #endif
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 /* Determine if this semaphore id is valid. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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319 if ((semaphore != NU_NULL) && (semaphore -> sm_id == SM_SEMAPHORE_ID))
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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320 {
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
321
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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322 /* Setup protection of the semaphore. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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323 TCT_System_Protect();
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 /* The semaphore pointer is valid. Reflect this in the completion
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
326 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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327 completion = NU_SUCCESS;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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328
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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329 /* Copy the semaphore's name. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
330 for (i = 0; i < NU_MAX_NAME; i++)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 *name++ = semaphore -> sm_name[i];
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
332
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
333 /* Determine the suspension type. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
334 if (semaphore -> sm_fifo_suspend)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
335 *suspend_type = NU_FIFO;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
336 else
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
337 *suspend_type = NU_PRIORITY;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
338
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
339 /* Return the current semaphore available instance count. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
340 *current_count = semaphore -> sm_semaphore_count;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
341
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
342 /* 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
343 first task waiting. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
344 *tasks_waiting = semaphore -> sm_tasks_waiting;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
345 if (semaphore -> sm_suspension_list)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
346
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
347 /* There is a task waiting. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
348 *first_task = (NU_TASK *)
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
349 (semaphore -> sm_suspension_list) -> sm_suspended_task;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
350 else
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
351
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
352 /* 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
353 *first_task = NU_NULL;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
354
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
355 /* Release protection of the semaphore. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
356 TCT_Unprotect();
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
357 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
358 else
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
359
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
360 /* Indicate that the semaphore pointer is invalid. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
361 completion = NU_INVALID_SEMAPHORE;
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
362
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
363 /* Return to user mode */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
364 NU_USER_MODE();
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 /* Return the appropriate completion status. */
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
367 return(completion);
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
368 }
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
369
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
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
372
0f80e1e4dce4 src/nucleus: library C code import from FreeNucleus package
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
373