Mercurial > trustbridge > nss-cmake-static

annotate nss/lib/libpkix/pkix_pl_nss/system/pkix_pl_mutex.c @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* This Source Code Form is subject to the terms of the Mozilla Public
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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4 /*
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5 * pkix_pl_mutex.c
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6 *
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7 * Mutual Exclusion (Lock) Object Functions
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8 *
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9 */
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10
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11 #include "pkix_pl_mutex.h"
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12
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13 /* --Private-Functions-------------------------------------------- */
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14
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15 /*
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16 * FUNCTION: pkix_pl_Mutex_Destroy
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17 * (see comments for PKIX_PL_DestructorCallback in pkix_pl_system.h)
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18 */
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19 static PKIX_Error *
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20 pkix_pl_Mutex_Destroy(
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21 PKIX_PL_Object *object,
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22 void *plContext)
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23 {
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24 PKIX_PL_Mutex *mutex = NULL;
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25
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26 PKIX_ENTER(MUTEX, "pkix_pl_Mutex_Destroy");
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27 PKIX_NULLCHECK_ONE(object);
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28
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29 /* Sanity check: Test that "object" is a mutex */
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30 PKIX_CHECK(pkix_CheckType(object, PKIX_MUTEX_TYPE, plContext),
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31 PKIX_OBJECTNOTMUTEX);
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32
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33 mutex = (PKIX_PL_Mutex*) object;
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34
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35 PKIX_MUTEX_DEBUG("\tCalling PR_DestroyLock).\n");
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36 PR_DestroyLock(mutex->lock);
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37 mutex->lock = NULL;
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38
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39 cleanup:
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40
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41 PKIX_RETURN(MUTEX);
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42 }
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43
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44 /*
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45 * FUNCTION: pkix_pl_Mutex_RegisterSelf
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46 * DESCRIPTION:
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47 * Registers PKIX_MUTEX_TYPE and its related functions with systemClasses[]
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48 * THREAD SAFETY:
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49 * Not Thread Safe - for performance and complexity reasons
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50 *
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51 * Since this function is only called by PKIX_PL_Initialize, which should
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52 * only be called once, it is acceptable that this function is not
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53 * thread-safe.
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54 */
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55 PKIX_Error *
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56 pkix_pl_Mutex_RegisterSelf(
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57 /* ARGSUSED */ void *plContext)
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58 {
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59
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60 extern pkix_ClassTable_Entry systemClasses[PKIX_NUMTYPES];
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61 pkix_ClassTable_Entry entry;
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62
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63 PKIX_ENTER(MUTEX, "pkix_pl_Mutex_RegisterSelf");
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64
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65 entry.description = "Mutex";
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66 entry.objCounter = 0;
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67 entry.typeObjectSize = sizeof(PKIX_PL_Mutex);
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68 entry.destructor = pkix_pl_Mutex_Destroy;
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69 entry.equalsFunction = NULL;
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70 entry.hashcodeFunction = NULL;
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71 entry.toStringFunction = NULL;
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72 entry.comparator = NULL;
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73 entry.duplicateFunction = NULL;
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74
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75 systemClasses[PKIX_MUTEX_TYPE] = entry;
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76
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77 PKIX_RETURN(MUTEX);
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78 }
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79
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80 /* --Public-Functions--------------------------------------------- */
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81
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82 /*
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83 * FUNCTION: PKIX_PL_Mutex_Create (see comments in pkix_pl_system.h)
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84 */
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85 PKIX_Error *
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86 PKIX_PL_Mutex_Create(
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87 PKIX_PL_Mutex **pNewLock,
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88 void *plContext)
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89 {
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90 PKIX_PL_Mutex *mutex = NULL;
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91
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92 PKIX_ENTER(MUTEX, "PKIX_PL_Mutex_Create");
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93 PKIX_NULLCHECK_ONE(pNewLock);
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94
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95 PKIX_CHECK(PKIX_PL_Object_Alloc
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96 (PKIX_MUTEX_TYPE,
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97 sizeof (PKIX_PL_Mutex),
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98 (PKIX_PL_Object **)&mutex,
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99 plContext),
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100 PKIX_COULDNOTCREATELOCKOBJECT);
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101
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102 PKIX_MUTEX_DEBUG("\tCalling PR_NewLock).\n");
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103 mutex->lock = PR_NewLock();
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104
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105 /* If an error occurred in NSPR, report it here */
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106 if (mutex->lock == NULL) {
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107 PKIX_DECREF(mutex);
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108 PKIX_ERROR_ALLOC_ERROR();
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109 }
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110
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111 *pNewLock = mutex;
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112
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113 cleanup:
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114
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115 PKIX_RETURN(MUTEX);
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116 }
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117
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118 /*
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119 * FUNCTION: PKIX_PL_Mutex_Lock (see comments in pkix_pl_system.h)
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120 */
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121 PKIX_Error *
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122 PKIX_PL_Mutex_Lock(
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123 PKIX_PL_Mutex *mutex,
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124 void *plContext)
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125 {
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126 PKIX_ENTER(MUTEX, "PKIX_PL_Mutex_Lock");
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127 PKIX_NULLCHECK_ONE(mutex);
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128
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129 PKIX_MUTEX_DEBUG("\tCalling PR_Lock).\n");
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130 PR_Lock(mutex->lock);
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131
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132 PKIX_MUTEX_DEBUG_ARG("(Thread %u just acquired the lock)\n",
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133 (PKIX_UInt32)PR_GetCurrentThread());
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134
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135 PKIX_RETURN(MUTEX);
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136 }
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137
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138 /*
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139 * FUNCTION: PKIX_PL_Mutex_Unlock (see comments in pkix_pl_system.h)
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140 */
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141 PKIX_Error *
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142 PKIX_PL_Mutex_Unlock(
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143 PKIX_PL_Mutex *mutex,
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144 void *plContext)
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145 {
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146 PRStatus result;
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147
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148 PKIX_ENTER(MUTEX, "PKIX_PL_Mutex_Unlock");
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149 PKIX_NULLCHECK_ONE(mutex);
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150
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151 PKIX_MUTEX_DEBUG("\tCalling PR_Unlock).\n");
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152 result = PR_Unlock(mutex->lock);
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153
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154 PKIX_MUTEX_DEBUG_ARG("(Thread %u just released the lock)\n",
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155 (PKIX_UInt32)PR_GetCurrentThread());
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156
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157 if (result == PR_FAILURE) {
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158 PKIX_ERROR_FATAL(PKIX_ERRORUNLOCKINGMUTEX);
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159 }
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160
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161 cleanup:
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162 PKIX_RETURN(MUTEX);
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163 }
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