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0
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1 /* Threads compatibility routines for libgcc2 and libobjc. */
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2 /* Compile this one with gcc. */
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3 /* Copyright (C) 1997, 1999, 2000, 2004, 2005, 2006, 2008, 2009
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4 Free Software Foundation, Inc.
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify it under
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9 the terms of the GNU General Public License as published by the Free
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10 Software Foundation; either version 3, or (at your option) any later
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11 version.
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12
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13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 Under Section 7 of GPL version 3, you are granted additional
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19 permissions described in the GCC Runtime Library Exception, version
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20 3.1, as published by the Free Software Foundation.
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21
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22 You should have received a copy of the GNU General Public License and
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23 a copy of the GCC Runtime Library Exception along with this program;
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24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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25 <http://www.gnu.org/licenses/>. */
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26
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27 #ifndef GCC_GTHR_SOLARIS_H
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28 #define GCC_GTHR_SOLARIS_H
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29
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30 /* Solaris threads as found in Solaris 2.[456].
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31 Actually these are Unix International (UI) threads, but I don't
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32 know if anyone else implements these. */
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33
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34 #define __GTHREADS 1
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35
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36 #include <thread.h>
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37 #include <errno.h>
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38
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39 #ifdef __cplusplus
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40 #define UNUSED(x)
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41 #else
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42 #define UNUSED(x) x __attribute__((unused))
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43 #endif
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44
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45 typedef thread_key_t __gthread_key_t;
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46 typedef struct {
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47 mutex_t mutex;
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48 int once;
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49 } __gthread_once_t;
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50 typedef mutex_t __gthread_mutex_t;
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51
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52 typedef struct {
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53 long depth;
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54 thread_t owner;
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55 mutex_t actual;
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56 } __gthread_recursive_mutex_t;
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57
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58 #define __GTHREAD_ONCE_INIT { DEFAULTMUTEX, 0 }
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59 #define __GTHREAD_MUTEX_INIT DEFAULTMUTEX
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60 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
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61
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62 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
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63 # define __gthrw(name) \
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64 static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)));
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65 # define __gthrw_(name) __gthrw_ ## name
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66 #else
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67 # define __gthrw(name)
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68 # define __gthrw_(name) name
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69 #endif
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70
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71 __gthrw(thr_keycreate)
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72 __gthrw(thr_getspecific)
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73 __gthrw(thr_setspecific)
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74 __gthrw(thr_create)
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75 __gthrw(thr_self)
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76
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77 __gthrw(mutex_init)
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78 __gthrw(mutex_destroy)
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79 __gthrw(mutex_lock)
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80 __gthrw(mutex_trylock)
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81 __gthrw(mutex_unlock)
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82
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83 #ifdef _LIBOBJC
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84 __gthrw(thr_exit)
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85 __gthrw(thr_getprio)
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86 __gthrw(thr_setprio)
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87 __gthrw(thr_yield)
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88
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89 __gthrw(cond_init)
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90 __gthrw(cond_destroy)
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91 __gthrw(cond_wait)
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92 __gthrw(cond_broadcast)
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93 __gthrw(cond_signal)
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94
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95 #endif
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96
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97 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
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98
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99 /* This will not actually work in Solaris 2.5, since libc contains
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100 dummy symbols of all thr_* routines. */
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101
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102 static inline int
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103 __gthread_active_p (void)
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104 {
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105 static void *const __gthread_active_ptr = (void *) &__gthrw_(thr_create);
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106 return __gthread_active_ptr != 0;
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107 }
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108
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109 #else /* not SUPPORTS_WEAK */
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110
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111 static inline int
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112 __gthread_active_p (void)
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113 {
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114 return 1;
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115 }
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116
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117 #endif /* SUPPORTS_WEAK */
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118
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119 #ifdef _LIBOBJC
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120
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121 /* Key structure for maintaining thread specific storage */
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122 static thread_key_t _objc_thread_storage;
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123
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124 /* Thread local storage for a single thread */
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125 static void *thread_local_storage = NULL;
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126
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127 /* Backend initialization functions */
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128
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129 /* Initialize the threads subsystem. */
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130 static inline int
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131 __gthread_objc_init_thread_system (void)
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132 {
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133 /* Initialize the thread storage key. */
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134 if (__gthread_active_p ()
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135 && __gthrw_(thr_keycreate) (&_objc_thread_storage, NULL) == 0)
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136 return 0;
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137
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138 return -1;
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139 }
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140
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141 /* Close the threads subsystem. */
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142 static inline int
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143 __gthread_objc_close_thread_system (void)
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144 {
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145 if (__gthread_active_p ())
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146 return 0;
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147 else
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148 return -1;
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149 }
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150
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151 /* Backend thread functions */
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152
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153 /* Create a new thread of execution. */
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154 static inline objc_thread_t
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155 __gthread_objc_thread_detach (void (*func)(void *), void *arg)
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156 {
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157 objc_thread_t thread_id;
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158 thread_t new_thread_id = 0;
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159
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160 if (!__gthread_active_p ())
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161 return NULL;
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162
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163 if (__gthrw_(thr_create) (NULL, 0, (void *) func, arg,
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164 THR_DETACHED | THR_NEW_LWP,
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165 &new_thread_id) == 0)
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166 thread_id = *(objc_thread_t *) &new_thread_id;
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167 else
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168 thread_id = NULL;
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169
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170 return thread_id;
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171 }
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172
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173 /* Set the current thread's priority. */
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174 static inline int
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175 __gthread_objc_thread_set_priority (int priority)
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176 {
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177 int sys_priority = 0;
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178
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179 if (!__gthread_active_p ())
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180 return -1;
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181
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182 switch (priority)
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183 {
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184 case OBJC_THREAD_INTERACTIVE_PRIORITY:
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185 sys_priority = 300;
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186 break;
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187 default:
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188 case OBJC_THREAD_BACKGROUND_PRIORITY:
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189 sys_priority = 200;
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190 break;
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191 case OBJC_THREAD_LOW_PRIORITY:
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192 sys_priority = 1000;
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193 break;
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194 }
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195
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196 /* Change priority */
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197 if (__gthrw_(thr_setprio) (__gthrw_(thr_self) (), sys_priority) == 0)
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198 return 0;
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199 else
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200 return -1;
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201 }
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202
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203 /* Return the current thread's priority. */
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204 static inline int
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205 __gthread_objc_thread_get_priority (void)
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206 {
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207 int sys_priority;
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208
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209 if (!__gthread_active_p ())
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210 return OBJC_THREAD_INTERACTIVE_PRIORITY;
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211
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212 if (__gthrw_(thr_getprio) (__gthrw_(thr_self) (), &sys_priority) == 0)
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213 {
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214 if (sys_priority >= 250)
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215 return OBJC_THREAD_INTERACTIVE_PRIORITY;
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216 else if (sys_priority >= 150)
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217 return OBJC_THREAD_BACKGROUND_PRIORITY;
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218 return OBJC_THREAD_LOW_PRIORITY;
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219 }
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220
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221 /* Couldn't get priority. */
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222 return -1;
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223 }
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224
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225 /* Yield our process time to another thread. */
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226 static inline void
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227 __gthread_objc_thread_yield (void)
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228 {
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229 if (__gthread_active_p ())
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230 __gthrw_(thr_yield) ();
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231 }
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232
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233 /* Terminate the current thread. */
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234 static inline int
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235 __gthread_objc_thread_exit (void)
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236 {
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237 if (__gthread_active_p ())
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238 /* exit the thread */
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239 __gthrw_(thr_exit) (&__objc_thread_exit_status);
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240
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241 /* Failed if we reached here */
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242 return -1;
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243 }
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244
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245 /* Returns an integer value which uniquely describes a thread. */
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246 static inline objc_thread_t
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247 __gthread_objc_thread_id (void)
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248 {
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249 if (__gthread_active_p ())
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250 return (objc_thread_t) __gthrw_(thr_self) ();
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251 else
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252 return (objc_thread_t) 1;
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253 }
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254
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255 /* Sets the thread's local storage pointer. */
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256 static inline int
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257 __gthread_objc_thread_set_data (void *value)
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258 {
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259 if (__gthread_active_p ())
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260 {
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261 if (__gthrw_(thr_setspecific) (_objc_thread_storage, value) == 0)
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262 return 0;
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263 else
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264 return -1;
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265 }
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266 else
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267 {
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268 thread_local_storage = value;
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269 return 0;
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270 }
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271 }
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272
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273 /* Returns the thread's local storage pointer. */
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274 static inline void *
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275 __gthread_objc_thread_get_data (void)
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276 {
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277 void *value = NULL;
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278
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279 if (__gthread_active_p ())
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280 {
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281 if (__gthrw_(thr_getspecific) (_objc_thread_storage, &value) == 0)
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282 return value;
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283 else
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284 return NULL;
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285 }
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286 else
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287 return thread_local_storage;
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288 }
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289
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290 /* Backend mutex functions */
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291
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292 /* Allocate a mutex. */
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293 static inline int
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294 __gthread_objc_mutex_allocate (objc_mutex_t mutex)
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295 {
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296 if (__gthread_active_p ()
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297 && __gthrw_(mutex_init) ((mutex_t *) (&(mutex->backend)), USYNC_THREAD, 0))
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298 return -1;
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299
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300 return 0;
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301 }
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302
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303 /* Deallocate a mutex. */
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304 static inline int
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305 __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
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306 {
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307 if (__gthread_active_p ())
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308 __gthrw_(mutex_destroy) ((mutex_t *) (&(mutex->backend)));
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309
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310 return 0;
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311 }
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312
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313 /* Grab a lock on a mutex. */
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314 static inline int
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315 __gthread_objc_mutex_lock (objc_mutex_t mutex)
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316 {
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317 if (__gthread_active_p ()
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318 && __gthrw_(mutex_lock) ((mutex_t *) (&(mutex->backend))) != 0)
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319 return -1;
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320
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321 return 0;
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322 }
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323
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324 /* Try to grab a lock on a mutex. */
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325 static inline int
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326 __gthread_objc_mutex_trylock (objc_mutex_t mutex)
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327 {
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328 if (__gthread_active_p ()
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329 && __gthrw_(mutex_trylock) ((mutex_t *) (&(mutex->backend))) != 0)
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330 return -1;
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331
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332 return 0;
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333 }
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334
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335 /* Unlock the mutex */
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336 static inline int
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337 __gthread_objc_mutex_unlock (objc_mutex_t mutex)
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338 {
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339 if (__gthread_active_p ()
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340 && __gthrw_(mutex_unlock) ((mutex_t *) (&(mutex->backend))) != 0)
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341 return -1;
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342
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343 return 0;
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344 }
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345
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346 /* Backend condition mutex functions */
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347
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348 /* Allocate a condition. */
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349 static inline int
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350 __gthread_objc_condition_allocate (objc_condition_t condition)
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351 {
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352 if (__gthread_active_p ())
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353 return __gthrw_(cond_init) ((cond_t *) (&(condition->backend)), USYNC_THREAD,
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354 NULL);
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355 else
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356 return 0;
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357 }
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358
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359 /* Deallocate a condition. */
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360 static inline int
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361 __gthread_objc_condition_deallocate (objc_condition_t condition)
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362 {
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363 if (__gthread_active_p ())
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364 return __gthrw_(cond_destroy) ((cond_t *) (&(condition->backend)));
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365 else
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366 return 0;
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367 }
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368
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369 /* Wait on the condition */
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370 static inline int
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371 __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
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372 {
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373 if (__gthread_active_p ())
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374 return __gthrw_(cond_wait) ((cond_t *) (&(condition->backend)),
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375 (mutex_t *) (&(mutex->backend)));
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376 else
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377 return 0;
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378 }
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379
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380 /* Wake up all threads waiting on this condition. */
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381 static inline int
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382 __gthread_objc_condition_broadcast (objc_condition_t condition)
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383 {
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384 if (__gthread_active_p ())
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385 return __gthrw_(cond_broadcast) ((cond_t *) (&(condition->backend)));
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386 else
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387 return 0;
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388 }
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389
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390 /* Wake up one thread waiting on this condition. */
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391 static inline int
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392 __gthread_objc_condition_signal (objc_condition_t condition)
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393 {
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394 if (__gthread_active_p ())
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395 return __gthrw_(cond_signal) ((cond_t *) (&(condition->backend)));
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396 else
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397 return 0;
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398 }
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399
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400 #else /* _LIBOBJC */
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401
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402 static inline int
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403 __gthread_once (__gthread_once_t *__once, void (*__func) (void))
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404 {
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405 if (! __gthread_active_p ())
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406 return -1;
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407
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408 if (__once == 0 || __func == 0)
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409 return EINVAL;
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410
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411 if (__once->once == 0)
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412 {
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413 int __status = __gthrw_(mutex_lock) (&__once->mutex);
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414 if (__status != 0)
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415 return __status;
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416 if (__once->once == 0)
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417 {
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418 (*__func) ();
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419 __once->once++;
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420 }
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421 __gthrw_(mutex_unlock) (&__once->mutex);
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422 }
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423 return 0;
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424 }
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425
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426 static inline int
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427 __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
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428 {
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429 /* Solaris 2.5 contains thr_* routines no-op in libc, so test if we actually
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430 got a reasonable key value, and if not, fail. */
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431 *__key = (__gthread_key_t)-1;
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432 if (__gthrw_(thr_keycreate) (__key, __dtor) != 0
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433 || *__key == (__gthread_key_t)-1)
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434 return -1;
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435 else
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436 return 0;
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437 }
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438
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439 static inline int
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440 __gthread_key_delete (__gthread_key_t UNUSED (__key))
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441 {
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442 /* Not possible. */
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443 return -1;
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444 }
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445
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446 static inline void *
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447 __gthread_getspecific (__gthread_key_t __key)
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448 {
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449 void *__ptr;
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450 if (__gthrw_(thr_getspecific) (__key, &__ptr) == 0)
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451 return __ptr;
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452 else
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453 return 0;
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454 }
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455
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456 static inline int
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457 __gthread_setspecific (__gthread_key_t __key, const void *__ptr)
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458 {
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459 return __gthrw_(thr_setspecific) (__key, (void *) __ptr);
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460 }
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461
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462 static inline int
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463 __gthread_mutex_destroy (__gthread_mutex_t * UNUSED(__mutex))
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464 {
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465 if (__gthread_active_p ())
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466 return __gthrw_(mutex_destroy) (__mutex);
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467 else
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468 return 0;
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469 }
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470
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471 static inline int
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472 __gthread_mutex_lock (__gthread_mutex_t *__mutex)
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473 {
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474 if (__gthread_active_p ())
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475 return __gthrw_(mutex_lock) (__mutex);
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476 else
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477 return 0;
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|
|
478 }
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479
|
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480 static inline int
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481 __gthread_mutex_trylock (__gthread_mutex_t *__mutex)
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482 {
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483 if (__gthread_active_p ())
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484 return __gthrw_(mutex_trylock) (__mutex);
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485 else
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486 return 0;
|
|
|
487 }
|
|
|
488
|
|
|
489 static inline int
|
|
|
490 __gthread_mutex_unlock (__gthread_mutex_t *__mutex)
|
|
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491 {
|
|
|
492 if (__gthread_active_p ())
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|
493 return __gthrw_(mutex_unlock) (__mutex);
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494 else
|
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|
495 return 0;
|
|
|
496 }
|
|
|
497
|
|
|
498 static inline int
|
|
|
499 __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
|
|
|
500 {
|
|
|
501 __mutex->depth = 0;
|
|
|
502 __mutex->owner = (thread_t) 0;
|
|
|
503 return __gthrw_(mutex_init) (&__mutex->actual, USYNC_THREAD, 0);
|
|
|
504 }
|
|
|
505
|
|
|
506 static inline int
|
|
|
507 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
|
|
|
508 {
|
|
|
509 if (__gthread_active_p ())
|
|
|
510 {
|
|
|
511 thread_t __me = __gthrw_(thr_self) ();
|
|
|
512
|
|
|
513 if (__mutex->owner != __me)
|
|
|
514 {
|
|
|
515 __gthrw_(mutex_lock) (&__mutex->actual);
|
|
|
516 __mutex->owner = __me;
|
|
|
517 }
|
|
|
518
|
|
|
519 __mutex->depth++;
|
|
|
520 }
|
|
|
521 return 0;
|
|
|
522 }
|
|
|
523
|
|
|
524 static inline int
|
|
|
525 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
|
|
|
526 {
|
|
|
527 if (__gthread_active_p ())
|
|
|
528 {
|
|
|
529 thread_t __me = __gthrw_(thr_self) ();
|
|
|
530
|
|
|
531 if (__mutex->owner != __me)
|
|
|
532 {
|
|
|
533 if (__gthrw_(mutex_trylock) (&__mutex->actual))
|
|
|
534 return 1;
|
|
|
535 __mutex->owner = __me;
|
|
|
536 }
|
|
|
537
|
|
|
538 __mutex->depth++;
|
|
|
539 }
|
|
|
540 return 0;
|
|
|
541 }
|
|
|
542
|
|
|
543 static inline int
|
|
|
544 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
|
|
|
545 {
|
|
|
546 if (__gthread_active_p ())
|
|
|
547 {
|
|
|
548 if (--__mutex->depth == 0)
|
|
|
549 {
|
|
|
550 __mutex->owner = (thread_t) 0;
|
|
|
551 __gthrw_(mutex_unlock) (&__mutex->actual);
|
|
|
552 }
|
|
|
553 }
|
|
|
554 return 0;
|
|
|
555 }
|
|
|
556
|
|
|
557 #endif /* _LIBOBJC */
|
|
|
558
|
|
|
559 #undef UNUSED
|
|
|
560
|
|
|
561 #endif /* ! GCC_GTHR_SOLARIS_H */
|
