Mercurial > projects > ldc
annotate druntime/src/compiler/dmd/monitor.c @ 1458:e0b2d67cfe7c
Added druntime (this should be removed once it works).
author | Robert Clipsham <robert@octarineparrot.com> |
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date | Tue, 02 Jun 2009 17:43:06 +0100 |
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1458
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1 /** |
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2 * Contains the implementation for object monitors. |
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3 * |
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4 * Copyright: Copyright Digital Mars 2000 - 2009. |
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5 * License: <a href="http://www.boost.org/LICENSE_1_0.txt>Boost License 1.0</a>. |
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6 * Authors: Walter Bright, Sean Kelly |
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7 * |
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8 * Copyright Digital Mars 2000 - 2009. |
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9 * Distributed under the Boost Software License, Version 1.0. |
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10 * (See accompanying file LICENSE_1_0.txt or copy at |
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11 * http://www.boost.org/LICENSE_1_0.txt) |
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12 */ |
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13 #include <stdio.h> |
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14 #include <stdlib.h> |
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15 #include <assert.h> |
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16 |
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17 #if _WIN32 |
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18 #elif linux || __APPLE__ |
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19 #define USE_PTHREADS 1 |
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20 #else |
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21 #endif |
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22 |
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23 #if _WIN32 |
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24 #include <windows.h> |
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25 #endif |
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26 |
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27 #if USE_PTHREADS |
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28 #include <pthread.h> |
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29 #endif |
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30 |
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31 #include "mars.h" |
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32 |
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33 // This is what the monitor reference in Object points to |
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34 typedef struct Monitor |
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35 { |
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36 void* impl; // for user-level monitors |
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37 Array devt; // for internal monitors |
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38 |
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39 #if _WIN32 |
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40 CRITICAL_SECTION mon; |
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41 #endif |
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42 |
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43 #if USE_PTHREADS |
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44 pthread_mutex_t mon; |
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45 #endif |
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46 } Monitor; |
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47 |
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48 #define MONPTR(h) (&((Monitor *)(h)->monitor)->mon) |
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49 |
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50 static volatile int inited; |
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51 |
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52 /* =============================== Win32 ============================ */ |
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53 |
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54 #if _WIN32 |
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55 |
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56 static CRITICAL_SECTION _monitor_critsec; |
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57 |
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58 void _STI_monitor_staticctor() |
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59 { |
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60 if (!inited) |
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61 { InitializeCriticalSection(&_monitor_critsec); |
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62 inited = 1; |
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63 } |
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64 } |
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65 |
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66 void _STD_monitor_staticdtor() |
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67 { |
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68 if (inited) |
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69 { inited = 0; |
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70 DeleteCriticalSection(&_monitor_critsec); |
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71 } |
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72 } |
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73 |
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74 void _d_monitor_create(Object *h) |
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75 { |
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76 /* |
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77 * NOTE: Assume this is only called when h->monitor is null prior to the |
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78 * call. However, please note that another thread may call this function |
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79 * at the same time, so we can not assert this here. Instead, try and |
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80 * create a lock, and if one already exists then forget about it. |
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81 */ |
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82 |
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83 //printf("+_d_monitor_create(%p)\n", h); |
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84 assert(h); |
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85 Monitor *cs = NULL; |
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86 EnterCriticalSection(&_monitor_critsec); |
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87 if (!h->monitor) |
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88 { |
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89 cs = (Monitor *)calloc(sizeof(Monitor), 1); |
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90 assert(cs); |
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91 InitializeCriticalSection(&cs->mon); |
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92 h->monitor = (void *)cs; |
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93 cs = NULL; |
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94 } |
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95 LeaveCriticalSection(&_monitor_critsec); |
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96 if (cs) |
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97 free(cs); |
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98 //printf("-_d_monitor_create(%p)\n", h); |
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99 } |
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100 |
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101 void _d_monitor_destroy(Object *h) |
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102 { |
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103 //printf("+_d_monitor_destroy(%p)\n", h); |
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104 assert(h && h->monitor && !(((Monitor*)h->monitor)->impl)); |
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105 DeleteCriticalSection(MONPTR(h)); |
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106 free((void *)h->monitor); |
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107 h->monitor = NULL; |
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108 //printf("-_d_monitor_destroy(%p)\n", h); |
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109 } |
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110 |
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111 int _d_monitor_lock(Object *h) |
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112 { |
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113 //printf("+_d_monitor_acquire(%p)\n", h); |
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114 assert(h && h->monitor && !(((Monitor*)h->monitor)->impl)); |
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115 EnterCriticalSection(MONPTR(h)); |
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116 //printf("-_d_monitor_acquire(%p)\n", h); |
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117 } |
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118 |
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119 void _d_monitor_unlock(Object *h) |
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120 { |
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121 //printf("+_d_monitor_release(%p)\n", h); |
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122 assert(h && h->monitor && !(((Monitor*)h->monitor)->impl)); |
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123 LeaveCriticalSection(MONPTR(h)); |
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124 //printf("-_d_monitor_release(%p)\n", h); |
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125 } |
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126 |
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127 #endif |
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128 |
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129 /* =============================== linux ============================ */ |
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130 |
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131 #if USE_PTHREADS |
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132 |
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133 #ifndef PTHREAD_MUTEX_RECURSIVE |
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134 # define PTHREAD_MUTEX_RECURSIVE PTHREAD_MUTEX_RECURSIVE_NP |
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135 #endif |
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136 |
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137 // Includes attribute fixes from David Friedman's GDC port |
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138 |
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139 static pthread_mutex_t _monitor_critsec; |
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140 static pthread_mutexattr_t _monitors_attr; |
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141 |
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142 void _STI_monitor_staticctor() |
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143 { |
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144 if (!inited) |
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145 { |
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146 pthread_mutexattr_init(&_monitors_attr); |
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147 pthread_mutexattr_settype(&_monitors_attr, PTHREAD_MUTEX_RECURSIVE); |
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148 pthread_mutex_init(&_monitor_critsec, 0); |
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149 inited = 1; |
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150 } |
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151 } |
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152 |
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153 void _STD_monitor_staticdtor() |
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154 { |
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155 if (inited) |
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156 { inited = 0; |
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157 pthread_mutex_destroy(&_monitor_critsec); |
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158 pthread_mutexattr_destroy(&_monitors_attr); |
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159 } |
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160 } |
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161 |
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162 void _d_monitor_create(Object *h) |
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163 { |
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164 /* |
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165 * NOTE: Assume this is only called when h->monitor is null prior to the |
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166 * call. However, please note that another thread may call this function |
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167 * at the same time, so we can not assert this here. Instead, try and |
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168 * create a lock, and if one already exists then forget about it. |
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169 */ |
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170 |
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171 //printf("+_d_monitor_create(%p)\n", h); |
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172 assert(h); |
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173 Monitor *cs = NULL; |
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174 pthread_mutex_lock(&_monitor_critsec); |
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175 if (!h->monitor) |
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176 { |
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177 cs = (Monitor *)calloc(sizeof(Monitor), 1); |
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178 assert(cs); |
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179 pthread_mutex_init(&cs->mon, & _monitors_attr); |
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180 h->monitor = (void *)cs; |
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181 cs = NULL; |
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182 } |
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183 pthread_mutex_unlock(&_monitor_critsec); |
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184 if (cs) |
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185 free(cs); |
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186 //printf("-_d_monitor_create(%p)\n", h); |
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187 } |
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188 |
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189 void _d_monitor_destroy(Object *h) |
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190 { |
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191 //printf("+_d_monitor_destroy(%p)\n", h); |
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192 assert(h && h->monitor && !(((Monitor*)h->monitor)->impl)); |
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193 pthread_mutex_destroy(MONPTR(h)); |
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194 free((void *)h->monitor); |
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195 h->monitor = NULL; |
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196 //printf("-_d_monitor_destroy(%p)\n", h); |
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197 } |
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198 |
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199 int _d_monitor_lock(Object *h) |
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200 { |
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201 //printf("+_d_monitor_acquire(%p)\n", h); |
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202 assert(h && h->monitor && !(((Monitor*)h->monitor)->impl)); |
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203 pthread_mutex_lock(MONPTR(h)); |
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204 //printf("-_d_monitor_acquire(%p)\n", h); |
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205 } |
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206 |
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207 void _d_monitor_unlock(Object *h) |
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208 { |
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209 //printf("+_d_monitor_release(%p)\n", h); |
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210 assert(h && h->monitor && !(((Monitor*)h->monitor)->impl)); |
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211 pthread_mutex_unlock(MONPTR(h)); |
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212 //printf("-_d_monitor_release(%p)\n", h); |
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213 } |
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214 |
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215 #endif |