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annotate runtime/internal/critical.c @ 650:aa6a0b7968f7

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Added test case for bug #100 Removed dubious check for not emitting static private global in other modules without access. This should be handled properly somewhere else, it's causing unresolved global errors for stuff that should work (in MiniD)
author Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
date Sun, 05 Oct 2008 17:28:15 +0200
parents 29dc68c949b0
children aa953cc960b6
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443
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1 /*
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2 * Placed into the Public Domain
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3 * written by Walter Bright, Digital Mars
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4 * www.digitalmars.com
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5 */
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7 /* ================================= Win32 ============================ */
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9 #if _WIN32
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10
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11 #include <windows.h>
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12
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13 /******************************************
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14 * Enter/exit critical section.
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15 */
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16
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17 /* We don't initialize critical sections unless we actually need them.
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18 * So keep a linked list of the ones we do use, and in the static destructor
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19 * code, walk the list and release them.
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20 */
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21
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22 typedef struct D_CRITICAL_SECTION
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23 {
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24 struct D_CRITICAL_SECTION *next;
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25 CRITICAL_SECTION cs;
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26 } D_CRITICAL_SECTION;
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27
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28 static D_CRITICAL_SECTION *dcs_list;
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29 static D_CRITICAL_SECTION critical_section;
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30 static volatile int inited;
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31
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32 void _d_criticalenter(D_CRITICAL_SECTION *dcs)
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33 {
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34 if (!dcs->next)
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35 {
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36 EnterCriticalSection(&critical_section.cs);
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37 if (!dcs->next) // if, in the meantime, another thread didn't set it
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38 {
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39 dcs->next = dcs_list;
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40 dcs_list = dcs;
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41 InitializeCriticalSection(&dcs->cs);
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42 }
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43 LeaveCriticalSection(&critical_section.cs);
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44 }
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45 EnterCriticalSection(&dcs->cs);
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46 }
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47
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48 void _d_criticalexit(D_CRITICAL_SECTION *dcs)
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49 {
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50 LeaveCriticalSection(&dcs->cs);
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51 }
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52
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53 void _STI_critical_init()
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54 {
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55 if (!inited)
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56 { InitializeCriticalSection(&critical_section.cs);
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57 dcs_list = &critical_section;
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58 inited = 1;
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59 }
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60 }
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61
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62 void _STD_critical_term()
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63 {
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64 if (inited)
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65 { inited = 0;
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66 while (dcs_list)
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67 {
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68 DeleteCriticalSection(&dcs_list->cs);
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69 dcs_list = dcs_list->next;
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70 }
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71 }
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72 }
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73
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74 #endif
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75
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76 /* ================================= linux ============================ */
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77
637
29dc68c949b0 Applied the FreeBSD patch from Ralith, closes ticket #95 , slightly changed but basically the same. Thanx Ralith :)
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78 #if linux || __APPLE__ || __FreeBSD__
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79
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80 #include <stdio.h>
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81 #include <stdlib.h>
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82 #include <pthread.h>
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83
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394e72cbbb46 Ok. last fix was wrong, PTHREAD_MUTEX_RECURSIVE_NP is only valid on linux...
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84 #if !linux
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85 #define PTHREAD_MUTEX_RECURSIVE_NP PTHREAD_MUTEX_RECURSIVE
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86 #endif
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87
443
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88 /******************************************
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89 * Enter/exit critical section.
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90 */
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91
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92 /* We don't initialize critical sections unless we actually need them.
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93 * So keep a linked list of the ones we do use, and in the static destructor
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94 * code, walk the list and release them.
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95 */
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96
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97 typedef struct D_CRITICAL_SECTION
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98 {
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99 struct D_CRITICAL_SECTION *next;
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100 pthread_mutex_t cs;
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101 } D_CRITICAL_SECTION;
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102
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103 static D_CRITICAL_SECTION *dcs_list;
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104 static D_CRITICAL_SECTION critical_section;
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105 static pthread_mutexattr_t _criticals_attr;
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106
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107 void _STI_critical_init(void);
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108 void _STD_critical_term(void);
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109
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110 void _d_criticalenter(D_CRITICAL_SECTION *dcs)
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111 {
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112 if (!dcs_list)
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113 { _STI_critical_init();
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114 atexit(_STD_critical_term);
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115 }
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116 //printf("_d_criticalenter(dcs = x%x)\n", dcs);
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117 if (!dcs->next)
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118 {
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119 pthread_mutex_lock(&critical_section.cs);
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120 if (!dcs->next) // if, in the meantime, another thread didn't set it
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121 {
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122 dcs->next = dcs_list;
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123 dcs_list = dcs;
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124 pthread_mutex_init(&dcs->cs, &_criticals_attr);
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125 }
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126 pthread_mutex_unlock(&critical_section.cs);
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127 }
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128 pthread_mutex_lock(&dcs->cs);
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129 }
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130
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131 void _d_criticalexit(D_CRITICAL_SECTION *dcs)
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132 {
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133 //printf("_d_criticalexit(dcs = x%x)\n", dcs);
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134 pthread_mutex_unlock(&dcs->cs);
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135 }
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136
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137 void _STI_critical_init()
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138 {
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139 if (!dcs_list)
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140 { //printf("_STI_critical_init()\n");
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141 pthread_mutexattr_init(&_criticals_attr);
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142 pthread_mutexattr_settype(&_criticals_attr, PTHREAD_MUTEX_RECURSIVE_NP);
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143
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144 // The global critical section doesn't need to be recursive
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145 pthread_mutex_init(&critical_section.cs, 0);
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146 dcs_list = &critical_section;
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147 }
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148 }
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149
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150 void _STD_critical_term()
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151 {
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152 if (dcs_list)
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153 { //printf("_STI_critical_term()\n");
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154 while (dcs_list)
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155 {
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156 //printf("\tlooping... %x\n", dcs_list);
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157 pthread_mutex_destroy(&dcs_list->cs);
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158 dcs_list = dcs_list->next;
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159 }
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160 }
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161 }
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162
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163 #endif
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164