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111
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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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145
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3 /* Copyright (C) 1997-2020 Free Software Foundation, Inc.
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111
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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20
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21 You should have received a copy of the GNU General Public License and
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22 a copy of the GCC Runtime Library Exception along with this program;
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23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 <http://www.gnu.org/licenses/>. */
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25
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26 #ifndef GCC_GTHR_POSIX_H
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27 #define GCC_GTHR_POSIX_H
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28
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29 /* POSIX threads specific definitions.
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30 Easy, since the interface is just one-to-one mapping. */
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31
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32 #define __GTHREADS 1
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33 #define __GTHREADS_CXX0X 1
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34
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35 #include <pthread.h>
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36
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37 #if ((defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)) \
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38 || !defined(_GTHREAD_USE_MUTEX_TIMEDLOCK))
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39 # include <unistd.h>
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40 # if defined(_POSIX_TIMEOUTS) && _POSIX_TIMEOUTS >= 0
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41 # define _GTHREAD_USE_MUTEX_TIMEDLOCK 1
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42 # else
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43 # define _GTHREAD_USE_MUTEX_TIMEDLOCK 0
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44 # endif
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45 #endif
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46
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47 typedef pthread_t __gthread_t;
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48 typedef pthread_key_t __gthread_key_t;
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49 typedef pthread_once_t __gthread_once_t;
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50 typedef pthread_mutex_t __gthread_mutex_t;
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51 typedef pthread_mutex_t __gthread_recursive_mutex_t;
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52 typedef pthread_cond_t __gthread_cond_t;
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53 typedef struct timespec __gthread_time_t;
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54
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55 /* POSIX like conditional variables are supported. Please look at comments
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56 in gthr.h for details. */
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57 #define __GTHREAD_HAS_COND 1
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58
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59 #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
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60 #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function
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61 #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
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62 #if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
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63 #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER
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64 #elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
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65 #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
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66 #else
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67 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
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68 #endif
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69 #define __GTHREAD_COND_INIT PTHREAD_COND_INITIALIZER
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70 #define __GTHREAD_TIME_INIT {0,0}
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71
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72 #ifdef _GTHREAD_USE_MUTEX_INIT_FUNC
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73 # undef __GTHREAD_MUTEX_INIT
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74 #endif
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75 #ifdef _GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC
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76 # undef __GTHREAD_RECURSIVE_MUTEX_INIT
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77 # undef __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION
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78 # define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
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79 #endif
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80 #ifdef _GTHREAD_USE_COND_INIT_FUNC
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81 # undef __GTHREAD_COND_INIT
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82 # define __GTHREAD_COND_INIT_FUNCTION __gthread_cond_init_function
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83 #endif
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84
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85 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
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86 # ifndef __gthrw_pragma
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87 # define __gthrw_pragma(pragma)
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88 # endif
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89 # define __gthrw2(name,name2,type) \
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145
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90 static __typeof(type) name \
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91 __attribute__ ((__weakref__(#name2), __copy__ (type))); \
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111
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92 __gthrw_pragma(weak type)
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93 # define __gthrw_(name) __gthrw_ ## name
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94 #else
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95 # define __gthrw2(name,name2,type)
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96 # define __gthrw_(name) name
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97 #endif
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98
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99 /* Typically, __gthrw_foo is a weak reference to symbol foo. */
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100 #define __gthrw(name) __gthrw2(__gthrw_ ## name,name,name)
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101
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102 __gthrw(pthread_once)
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103 __gthrw(pthread_getspecific)
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104 __gthrw(pthread_setspecific)
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105
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106 __gthrw(pthread_create)
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107 __gthrw(pthread_join)
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108 __gthrw(pthread_equal)
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109 __gthrw(pthread_self)
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110 __gthrw(pthread_detach)
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111 #ifndef __BIONIC__
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112 __gthrw(pthread_cancel)
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113 #endif
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114 __gthrw(sched_yield)
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115
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116 __gthrw(pthread_mutex_lock)
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117 __gthrw(pthread_mutex_trylock)
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118 #if _GTHREAD_USE_MUTEX_TIMEDLOCK
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119 __gthrw(pthread_mutex_timedlock)
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120 #endif
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121 __gthrw(pthread_mutex_unlock)
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122 __gthrw(pthread_mutex_init)
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123 __gthrw(pthread_mutex_destroy)
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124
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125 __gthrw(pthread_cond_init)
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126 __gthrw(pthread_cond_broadcast)
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127 __gthrw(pthread_cond_signal)
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128 __gthrw(pthread_cond_wait)
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129 __gthrw(pthread_cond_timedwait)
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130 __gthrw(pthread_cond_destroy)
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131
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132 __gthrw(pthread_key_create)
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133 __gthrw(pthread_key_delete)
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134 __gthrw(pthread_mutexattr_init)
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135 __gthrw(pthread_mutexattr_settype)
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136 __gthrw(pthread_mutexattr_destroy)
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137
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138
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139 #if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
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140 /* Objective-C. */
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141 __gthrw(pthread_exit)
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142 #ifdef _POSIX_PRIORITY_SCHEDULING
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143 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
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144 __gthrw(sched_get_priority_max)
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145 __gthrw(sched_get_priority_min)
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146 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
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147 #endif /* _POSIX_PRIORITY_SCHEDULING */
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148 __gthrw(pthread_attr_destroy)
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149 __gthrw(pthread_attr_init)
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150 __gthrw(pthread_attr_setdetachstate)
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151 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
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152 __gthrw(pthread_getschedparam)
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153 __gthrw(pthread_setschedparam)
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154 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
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155 #endif /* _LIBOBJC || _LIBOBJC_WEAK */
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156
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157 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
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158
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159 /* On Solaris 2.6 up to 9, the libc exposes a POSIX threads interface even if
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160 -pthreads is not specified. The functions are dummies and most return an
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161 error value. However pthread_once returns 0 without invoking the routine
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162 it is passed so we cannot pretend that the interface is active if -pthreads
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163 is not specified. On Solaris 2.5.1, the interface is not exposed at all so
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164 we need to play the usual game with weak symbols. On Solaris 10 and up, a
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165 working interface is always exposed. On FreeBSD 6 and later, libc also
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166 exposes a dummy POSIX threads interface, similar to what Solaris 2.6 up
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167 to 9 does. FreeBSD >= 700014 even provides a pthread_cancel stub in libc,
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168 which means the alternate __gthread_active_p below cannot be used there. */
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169
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170 #if defined(__FreeBSD__) || (defined(__sun) && defined(__svr4__))
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171
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172 static volatile int __gthread_active = -1;
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173
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174 static void
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175 __gthread_trigger (void)
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176 {
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177 __gthread_active = 1;
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178 }
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179
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180 static inline int
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181 __gthread_active_p (void)
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182 {
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183 static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
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184 static pthread_once_t __gthread_active_once = PTHREAD_ONCE_INIT;
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185
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186 /* Avoid reading __gthread_active twice on the main code path. */
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187 int __gthread_active_latest_value = __gthread_active;
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188
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189 /* This test is not protected to avoid taking a lock on the main code
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190 path so every update of __gthread_active in a threaded program must
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191 be atomic with regard to the result of the test. */
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192 if (__builtin_expect (__gthread_active_latest_value < 0, 0))
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193 {
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194 if (__gthrw_(pthread_once))
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195 {
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196 /* If this really is a threaded program, then we must ensure that
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197 __gthread_active has been set to 1 before exiting this block. */
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198 __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
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199 __gthrw_(pthread_once) (&__gthread_active_once, __gthread_trigger);
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200 __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
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201 }
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202
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203 /* Make sure we'll never enter this block again. */
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204 if (__gthread_active < 0)
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205 __gthread_active = 0;
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206
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207 __gthread_active_latest_value = __gthread_active;
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208 }
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209
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210 return __gthread_active_latest_value != 0;
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211 }
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212
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213 #else /* neither FreeBSD nor Solaris */
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214
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215 /* For a program to be multi-threaded the only thing that it certainly must
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216 be using is pthread_create. However, there may be other libraries that
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217 intercept pthread_create with their own definitions to wrap pthreads
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218 functionality for some purpose. In those cases, pthread_create being
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219 defined might not necessarily mean that libpthread is actually linked
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220 in.
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221
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222 For the GNU C library, we can use a known internal name. This is always
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223 available in the ABI, but no other library would define it. That is
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224 ideal, since any public pthread function might be intercepted just as
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225 pthread_create might be. __pthread_key_create is an "internal"
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226 implementation symbol, but it is part of the public exported ABI. Also,
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227 it's among the symbols that the static libpthread.a always links in
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228 whenever pthread_create is used, so there is no danger of a false
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229 negative result in any statically-linked, multi-threaded program.
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230
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231 For others, we choose pthread_cancel as a function that seems unlikely
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232 to be redefined by an interceptor library. The bionic (Android) C
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233 library does not provide pthread_cancel, so we do use pthread_create
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234 there (and interceptor libraries lose). */
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235
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236 #ifdef __GLIBC__
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237 __gthrw2(__gthrw_(__pthread_key_create),
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238 __pthread_key_create,
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239 pthread_key_create)
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240 # define GTHR_ACTIVE_PROXY __gthrw_(__pthread_key_create)
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241 #elif defined (__BIONIC__)
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242 # define GTHR_ACTIVE_PROXY __gthrw_(pthread_create)
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243 #else
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244 # define GTHR_ACTIVE_PROXY __gthrw_(pthread_cancel)
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245 #endif
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246
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247 static inline int
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248 __gthread_active_p (void)
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249 {
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250 static void *const __gthread_active_ptr
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251 = __extension__ (void *) >HR_ACTIVE_PROXY;
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252 return __gthread_active_ptr != 0;
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253 }
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254
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255 #endif /* FreeBSD or Solaris */
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256
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257 #else /* not SUPPORTS_WEAK */
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258
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259 /* Similar to Solaris, HP-UX 11 for PA-RISC provides stubs for pthread
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260 calls in shared flavors of the HP-UX C library. Most of the stubs
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261 have no functionality. The details are described in the "libc cumulative
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262 patch" for each subversion of HP-UX 11. There are two special interfaces
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263 provided for checking whether an application is linked to a shared pthread
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264 library or not. However, these interfaces aren't available in early
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265 libpthread libraries. We also need a test that works for archive
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266 libraries. We can't use pthread_once as some libc versions call the
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267 init function. We also can't use pthread_create or pthread_attr_init
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268 as these create a thread and thereby prevent changing the default stack
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269 size. The function pthread_default_stacksize_np is available in both
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270 the archive and shared versions of libpthread. It can be used to
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271 determine the default pthread stack size. There is a stub in some
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272 shared libc versions which returns a zero size if pthreads are not
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273 active. We provide an equivalent stub to handle cases where libc
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274 doesn't provide one. */
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275
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276 #if defined(__hppa__) && defined(__hpux__)
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277
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278 static volatile int __gthread_active = -1;
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279
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280 static inline int
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281 __gthread_active_p (void)
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282 {
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283 /* Avoid reading __gthread_active twice on the main code path. */
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284 int __gthread_active_latest_value = __gthread_active;
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285 size_t __s;
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286
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287 if (__builtin_expect (__gthread_active_latest_value < 0, 0))
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288 {
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289 pthread_default_stacksize_np (0, &__s);
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290 __gthread_active = __s ? 1 : 0;
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291 __gthread_active_latest_value = __gthread_active;
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292 }
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293
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294 return __gthread_active_latest_value != 0;
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295 }
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296
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297 #else /* not hppa-hpux */
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298
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299 static inline int
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300 __gthread_active_p (void)
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301 {
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302 return 1;
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303 }
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304
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305 #endif /* hppa-hpux */
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306
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307 #endif /* SUPPORTS_WEAK */
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308
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309 #ifdef _LIBOBJC
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310
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311 /* This is the config.h file in libobjc/ */
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312 #include <config.h>
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313
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314 #ifdef HAVE_SCHED_H
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315 # include <sched.h>
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316 #endif
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317
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318 /* Key structure for maintaining thread specific storage */
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319 static pthread_key_t _objc_thread_storage;
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320 static pthread_attr_t _objc_thread_attribs;
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321
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322 /* Thread local storage for a single thread */
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323 static void *thread_local_storage = NULL;
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324
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325 /* Backend initialization functions */
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326
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327 /* Initialize the threads subsystem. */
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328 static inline int
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329 __gthread_objc_init_thread_system (void)
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330 {
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331 if (__gthread_active_p ())
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332 {
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333 /* Initialize the thread storage key. */
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334 if (__gthrw_(pthread_key_create) (&_objc_thread_storage, NULL) == 0)
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335 {
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336 /* The normal default detach state for threads is
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337 * PTHREAD_CREATE_JOINABLE which causes threads to not die
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338 * when you think they should. */
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339 if (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0
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340 && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs,
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341 PTHREAD_CREATE_DETACHED) == 0)
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342 return 0;
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343 }
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344 }
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345
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346 return -1;
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347 }
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348
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349 /* Close the threads subsystem. */
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350 static inline int
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351 __gthread_objc_close_thread_system (void)
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352 {
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353 if (__gthread_active_p ()
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354 && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0
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355 && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 0)
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356 return 0;
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357
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358 return -1;
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359 }
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360
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361 /* Backend thread functions */
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362
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363 /* Create a new thread of execution. */
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364 static inline objc_thread_t
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365 __gthread_objc_thread_detach (void (*func)(void *), void *arg)
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366 {
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367 objc_thread_t thread_id;
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368 pthread_t new_thread_handle;
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369
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370 if (!__gthread_active_p ())
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371 return NULL;
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372
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373 if (!(__gthrw_(pthread_create) (&new_thread_handle, &_objc_thread_attribs,
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374 (void *) func, arg)))
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|
|
375 thread_id = (objc_thread_t) new_thread_handle;
|
|
|
376 else
|
|
|
377 thread_id = NULL;
|
|
|
378
|
|
|
379 return thread_id;
|
|
|
380 }
|
|
|
381
|
|
|
382 /* Set the current thread's priority. */
|
|
|
383 static inline int
|
|
|
384 __gthread_objc_thread_set_priority (int priority)
|
|
|
385 {
|
|
|
386 if (!__gthread_active_p ())
|
|
|
387 return -1;
|
|
|
388 else
|
|
|
389 {
|
|
|
390 #ifdef _POSIX_PRIORITY_SCHEDULING
|
|
|
391 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
|
|
|
392 pthread_t thread_id = __gthrw_(pthread_self) ();
|
|
|
393 int policy;
|
|
|
394 struct sched_param params;
|
|
|
395 int priority_min, priority_max;
|
|
|
396
|
|
|
397 if (__gthrw_(pthread_getschedparam) (thread_id, &policy, ¶ms) == 0)
|
|
|
398 {
|
|
|
399 if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1)
|
|
|
400 return -1;
|
|
|
401
|
|
|
402 if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1)
|
|
|
403 return -1;
|
|
|
404
|
|
|
405 if (priority > priority_max)
|
|
|
406 priority = priority_max;
|
|
|
407 else if (priority < priority_min)
|
|
|
408 priority = priority_min;
|
|
|
409 params.sched_priority = priority;
|
|
|
410
|
|
|
411 /*
|
|
|
412 * The solaris 7 and several other man pages incorrectly state that
|
|
|
413 * this should be a pointer to policy but pthread.h is universally
|
|
|
414 * at odds with this.
|
|
|
415 */
|
|
|
416 if (__gthrw_(pthread_setschedparam) (thread_id, policy, ¶ms) == 0)
|
|
|
417 return 0;
|
|
|
418 }
|
|
|
419 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
|
|
|
420 #endif /* _POSIX_PRIORITY_SCHEDULING */
|
|
|
421 return -1;
|
|
|
422 }
|
|
|
423 }
|
|
|
424
|
|
|
425 /* Return the current thread's priority. */
|
|
|
426 static inline int
|
|
|
427 __gthread_objc_thread_get_priority (void)
|
|
|
428 {
|
|
|
429 #ifdef _POSIX_PRIORITY_SCHEDULING
|
|
|
430 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
|
|
|
431 if (__gthread_active_p ())
|
|
|
432 {
|
|
|
433 int policy;
|
|
|
434 struct sched_param params;
|
|
|
435
|
|
|
436 if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, ¶ms) == 0)
|
|
|
437 return params.sched_priority;
|
|
|
438 else
|
|
|
439 return -1;
|
|
|
440 }
|
|
|
441 else
|
|
|
442 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
|
|
|
443 #endif /* _POSIX_PRIORITY_SCHEDULING */
|
|
|
444 return OBJC_THREAD_INTERACTIVE_PRIORITY;
|
|
|
445 }
|
|
|
446
|
|
|
447 /* Yield our process time to another thread. */
|
|
|
448 static inline void
|
|
|
449 __gthread_objc_thread_yield (void)
|
|
|
450 {
|
|
|
451 if (__gthread_active_p ())
|
|
|
452 __gthrw_(sched_yield) ();
|
|
|
453 }
|
|
|
454
|
|
|
455 /* Terminate the current thread. */
|
|
|
456 static inline int
|
|
|
457 __gthread_objc_thread_exit (void)
|
|
|
458 {
|
|
|
459 if (__gthread_active_p ())
|
|
|
460 /* exit the thread */
|
|
|
461 __gthrw_(pthread_exit) (&__objc_thread_exit_status);
|
|
|
462
|
|
|
463 /* Failed if we reached here */
|
|
|
464 return -1;
|
|
|
465 }
|
|
|
466
|
|
|
467 /* Returns an integer value which uniquely describes a thread. */
|
|
|
468 static inline objc_thread_t
|
|
|
469 __gthread_objc_thread_id (void)
|
|
|
470 {
|
|
|
471 if (__gthread_active_p ())
|
|
|
472 return (objc_thread_t) __gthrw_(pthread_self) ();
|
|
|
473 else
|
|
|
474 return (objc_thread_t) 1;
|
|
|
475 }
|
|
|
476
|
|
|
477 /* Sets the thread's local storage pointer. */
|
|
|
478 static inline int
|
|
|
479 __gthread_objc_thread_set_data (void *value)
|
|
|
480 {
|
|
|
481 if (__gthread_active_p ())
|
|
|
482 return __gthrw_(pthread_setspecific) (_objc_thread_storage, value);
|
|
|
483 else
|
|
|
484 {
|
|
|
485 thread_local_storage = value;
|
|
|
486 return 0;
|
|
|
487 }
|
|
|
488 }
|
|
|
489
|
|
|
490 /* Returns the thread's local storage pointer. */
|
|
|
491 static inline void *
|
|
|
492 __gthread_objc_thread_get_data (void)
|
|
|
493 {
|
|
|
494 if (__gthread_active_p ())
|
|
|
495 return __gthrw_(pthread_getspecific) (_objc_thread_storage);
|
|
|
496 else
|
|
|
497 return thread_local_storage;
|
|
|
498 }
|
|
|
499
|
|
|
500 /* Backend mutex functions */
|
|
|
501
|
|
|
502 /* Allocate a mutex. */
|
|
|
503 static inline int
|
|
|
504 __gthread_objc_mutex_allocate (objc_mutex_t mutex)
|
|
|
505 {
|
|
|
506 if (__gthread_active_p ())
|
|
|
507 {
|
|
|
508 mutex->backend = objc_malloc (sizeof (pthread_mutex_t));
|
|
|
509
|
|
|
510 if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL))
|
|
|
511 {
|
|
|
512 objc_free (mutex->backend);
|
|
|
513 mutex->backend = NULL;
|
|
|
514 return -1;
|
|
|
515 }
|
|
|
516 }
|
|
|
517
|
|
|
518 return 0;
|
|
|
519 }
|
|
|
520
|
|
|
521 /* Deallocate a mutex. */
|
|
|
522 static inline int
|
|
|
523 __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
|
|
|
524 {
|
|
|
525 if (__gthread_active_p ())
|
|
|
526 {
|
|
|
527 int count;
|
|
|
528
|
|
|
529 /*
|
|
|
530 * Posix Threads specifically require that the thread be unlocked
|
|
|
531 * for __gthrw_(pthread_mutex_destroy) to work.
|
|
|
532 */
|
|
|
533
|
|
|
534 do
|
|
|
535 {
|
|
|
536 count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend);
|
|
|
537 if (count < 0)
|
|
|
538 return -1;
|
|
|
539 }
|
|
|
540 while (count);
|
|
|
541
|
|
|
542 if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend))
|
|
|
543 return -1;
|
|
|
544
|
|
|
545 objc_free (mutex->backend);
|
|
|
546 mutex->backend = NULL;
|
|
|
547 }
|
|
|
548 return 0;
|
|
|
549 }
|
|
|
550
|
|
|
551 /* Grab a lock on a mutex. */
|
|
|
552 static inline int
|
|
|
553 __gthread_objc_mutex_lock (objc_mutex_t mutex)
|
|
|
554 {
|
|
|
555 if (__gthread_active_p ()
|
|
|
556 && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0)
|
|
|
557 {
|
|
|
558 return -1;
|
|
|
559 }
|
|
|
560
|
|
|
561 return 0;
|
|
|
562 }
|
|
|
563
|
|
|
564 /* Try to grab a lock on a mutex. */
|
|
|
565 static inline int
|
|
|
566 __gthread_objc_mutex_trylock (objc_mutex_t mutex)
|
|
|
567 {
|
|
|
568 if (__gthread_active_p ()
|
|
|
569 && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0)
|
|
|
570 {
|
|
|
571 return -1;
|
|
|
572 }
|
|
|
573
|
|
|
574 return 0;
|
|
|
575 }
|
|
|
576
|
|
|
577 /* Unlock the mutex */
|
|
|
578 static inline int
|
|
|
579 __gthread_objc_mutex_unlock (objc_mutex_t mutex)
|
|
|
580 {
|
|
|
581 if (__gthread_active_p ()
|
|
|
582 && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0)
|
|
|
583 {
|
|
|
584 return -1;
|
|
|
585 }
|
|
|
586
|
|
|
587 return 0;
|
|
|
588 }
|
|
|
589
|
|
|
590 /* Backend condition mutex functions */
|
|
|
591
|
|
|
592 /* Allocate a condition. */
|
|
|
593 static inline int
|
|
|
594 __gthread_objc_condition_allocate (objc_condition_t condition)
|
|
|
595 {
|
|
|
596 if (__gthread_active_p ())
|
|
|
597 {
|
|
|
598 condition->backend = objc_malloc (sizeof (pthread_cond_t));
|
|
|
599
|
|
|
600 if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL))
|
|
|
601 {
|
|
|
602 objc_free (condition->backend);
|
|
|
603 condition->backend = NULL;
|
|
|
604 return -1;
|
|
|
605 }
|
|
|
606 }
|
|
|
607
|
|
|
608 return 0;
|
|
|
609 }
|
|
|
610
|
|
|
611 /* Deallocate a condition. */
|
|
|
612 static inline int
|
|
|
613 __gthread_objc_condition_deallocate (objc_condition_t condition)
|
|
|
614 {
|
|
|
615 if (__gthread_active_p ())
|
|
|
616 {
|
|
|
617 if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend))
|
|
|
618 return -1;
|
|
|
619
|
|
|
620 objc_free (condition->backend);
|
|
|
621 condition->backend = NULL;
|
|
|
622 }
|
|
|
623 return 0;
|
|
|
624 }
|
|
|
625
|
|
|
626 /* Wait on the condition */
|
|
|
627 static inline int
|
|
|
628 __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
|
|
|
629 {
|
|
|
630 if (__gthread_active_p ())
|
|
|
631 return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend,
|
|
|
632 (pthread_mutex_t *) mutex->backend);
|
|
|
633 else
|
|
|
634 return 0;
|
|
|
635 }
|
|
|
636
|
|
|
637 /* Wake up all threads waiting on this condition. */
|
|
|
638 static inline int
|
|
|
639 __gthread_objc_condition_broadcast (objc_condition_t condition)
|
|
|
640 {
|
|
|
641 if (__gthread_active_p ())
|
|
|
642 return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend);
|
|
|
643 else
|
|
|
644 return 0;
|
|
|
645 }
|
|
|
646
|
|
|
647 /* Wake up one thread waiting on this condition. */
|
|
|
648 static inline int
|
|
|
649 __gthread_objc_condition_signal (objc_condition_t condition)
|
|
|
650 {
|
|
|
651 if (__gthread_active_p ())
|
|
|
652 return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend);
|
|
|
653 else
|
|
|
654 return 0;
|
|
|
655 }
|
|
|
656
|
|
|
657 #else /* _LIBOBJC */
|
|
|
658
|
|
|
659 static inline int
|
|
|
660 __gthread_create (__gthread_t *__threadid, void *(*__func) (void*),
|
|
|
661 void *__args)
|
|
|
662 {
|
|
|
663 return __gthrw_(pthread_create) (__threadid, NULL, __func, __args);
|
|
|
664 }
|
|
|
665
|
|
|
666 static inline int
|
|
|
667 __gthread_join (__gthread_t __threadid, void **__value_ptr)
|
|
|
668 {
|
|
|
669 return __gthrw_(pthread_join) (__threadid, __value_ptr);
|
|
|
670 }
|
|
|
671
|
|
|
672 static inline int
|
|
|
673 __gthread_detach (__gthread_t __threadid)
|
|
|
674 {
|
|
|
675 return __gthrw_(pthread_detach) (__threadid);
|
|
|
676 }
|
|
|
677
|
|
|
678 static inline int
|
|
|
679 __gthread_equal (__gthread_t __t1, __gthread_t __t2)
|
|
|
680 {
|
|
|
681 return __gthrw_(pthread_equal) (__t1, __t2);
|
|
|
682 }
|
|
|
683
|
|
|
684 static inline __gthread_t
|
|
|
685 __gthread_self (void)
|
|
|
686 {
|
|
|
687 return __gthrw_(pthread_self) ();
|
|
|
688 }
|
|
|
689
|
|
|
690 static inline int
|
|
|
691 __gthread_yield (void)
|
|
|
692 {
|
|
|
693 return __gthrw_(sched_yield) ();
|
|
|
694 }
|
|
|
695
|
|
|
696 static inline int
|
|
|
697 __gthread_once (__gthread_once_t *__once, void (*__func) (void))
|
|
|
698 {
|
|
|
699 if (__gthread_active_p ())
|
|
|
700 return __gthrw_(pthread_once) (__once, __func);
|
|
|
701 else
|
|
|
702 return -1;
|
|
|
703 }
|
|
|
704
|
|
|
705 static inline int
|
|
|
706 __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
|
|
|
707 {
|
|
|
708 return __gthrw_(pthread_key_create) (__key, __dtor);
|
|
|
709 }
|
|
|
710
|
|
|
711 static inline int
|
|
|
712 __gthread_key_delete (__gthread_key_t __key)
|
|
|
713 {
|
|
|
714 return __gthrw_(pthread_key_delete) (__key);
|
|
|
715 }
|
|
|
716
|
|
|
717 static inline void *
|
|
|
718 __gthread_getspecific (__gthread_key_t __key)
|
|
|
719 {
|
|
|
720 return __gthrw_(pthread_getspecific) (__key);
|
|
|
721 }
|
|
|
722
|
|
|
723 static inline int
|
|
|
724 __gthread_setspecific (__gthread_key_t __key, const void *__ptr)
|
|
|
725 {
|
|
|
726 return __gthrw_(pthread_setspecific) (__key, __ptr);
|
|
|
727 }
|
|
|
728
|
|
|
729 static inline void
|
|
|
730 __gthread_mutex_init_function (__gthread_mutex_t *__mutex)
|
|
|
731 {
|
|
|
732 if (__gthread_active_p ())
|
|
|
733 __gthrw_(pthread_mutex_init) (__mutex, NULL);
|
|
|
734 }
|
|
|
735
|
|
|
736 static inline int
|
|
|
737 __gthread_mutex_destroy (__gthread_mutex_t *__mutex)
|
|
|
738 {
|
|
|
739 if (__gthread_active_p ())
|
|
|
740 return __gthrw_(pthread_mutex_destroy) (__mutex);
|
|
|
741 else
|
|
|
742 return 0;
|
|
|
743 }
|
|
|
744
|
|
|
745 static inline int
|
|
|
746 __gthread_mutex_lock (__gthread_mutex_t *__mutex)
|
|
|
747 {
|
|
|
748 if (__gthread_active_p ())
|
|
|
749 return __gthrw_(pthread_mutex_lock) (__mutex);
|
|
|
750 else
|
|
|
751 return 0;
|
|
|
752 }
|
|
|
753
|
|
|
754 static inline int
|
|
|
755 __gthread_mutex_trylock (__gthread_mutex_t *__mutex)
|
|
|
756 {
|
|
|
757 if (__gthread_active_p ())
|
|
|
758 return __gthrw_(pthread_mutex_trylock) (__mutex);
|
|
|
759 else
|
|
|
760 return 0;
|
|
|
761 }
|
|
|
762
|
|
|
763 #if _GTHREAD_USE_MUTEX_TIMEDLOCK
|
|
|
764 static inline int
|
|
|
765 __gthread_mutex_timedlock (__gthread_mutex_t *__mutex,
|
|
|
766 const __gthread_time_t *__abs_timeout)
|
|
|
767 {
|
|
|
768 if (__gthread_active_p ())
|
|
|
769 return __gthrw_(pthread_mutex_timedlock) (__mutex, __abs_timeout);
|
|
|
770 else
|
|
|
771 return 0;
|
|
|
772 }
|
|
|
773 #endif
|
|
|
774
|
|
|
775 static inline int
|
|
|
776 __gthread_mutex_unlock (__gthread_mutex_t *__mutex)
|
|
|
777 {
|
|
|
778 if (__gthread_active_p ())
|
|
|
779 return __gthrw_(pthread_mutex_unlock) (__mutex);
|
|
|
780 else
|
|
|
781 return 0;
|
|
|
782 }
|
|
|
783
|
|
|
784 #if !defined( PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP) \
|
|
|
785 || defined(_GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC)
|
|
|
786 static inline int
|
|
|
787 __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
|
|
|
788 {
|
|
|
789 if (__gthread_active_p ())
|
|
|
790 {
|
|
|
791 pthread_mutexattr_t __attr;
|
|
|
792 int __r;
|
|
|
793
|
|
|
794 __r = __gthrw_(pthread_mutexattr_init) (&__attr);
|
|
|
795 if (!__r)
|
|
|
796 __r = __gthrw_(pthread_mutexattr_settype) (&__attr,
|
|
|
797 PTHREAD_MUTEX_RECURSIVE);
|
|
|
798 if (!__r)
|
|
|
799 __r = __gthrw_(pthread_mutex_init) (__mutex, &__attr);
|
|
|
800 if (!__r)
|
|
|
801 __r = __gthrw_(pthread_mutexattr_destroy) (&__attr);
|
|
|
802 return __r;
|
|
|
803 }
|
|
|
804 return 0;
|
|
|
805 }
|
|
|
806 #endif
|
|
|
807
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808 static inline int
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809 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
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810 {
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811 return __gthread_mutex_lock (__mutex);
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812 }
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813
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814 static inline int
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815 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
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816 {
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|
817 return __gthread_mutex_trylock (__mutex);
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818 }
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819
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820 #if _GTHREAD_USE_MUTEX_TIMEDLOCK
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821 static inline int
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822 __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *__mutex,
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823 const __gthread_time_t *__abs_timeout)
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824 {
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825 return __gthread_mutex_timedlock (__mutex, __abs_timeout);
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826 }
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827 #endif
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828
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829 static inline int
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830 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
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831 {
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832 return __gthread_mutex_unlock (__mutex);
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833 }
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834
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835 static inline int
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|
836 __gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex)
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837 {
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|
838 return __gthread_mutex_destroy (__mutex);
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|
839 }
|
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|
840
|
|
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841 #ifdef _GTHREAD_USE_COND_INIT_FUNC
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842 static inline void
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843 __gthread_cond_init_function (__gthread_cond_t *__cond)
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844 {
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|
845 if (__gthread_active_p ())
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|
846 __gthrw_(pthread_cond_init) (__cond, NULL);
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|
847 }
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|
|
848 #endif
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|
|
849
|
|
|
850 static inline int
|
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|
851 __gthread_cond_broadcast (__gthread_cond_t *__cond)
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|
852 {
|
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|
853 return __gthrw_(pthread_cond_broadcast) (__cond);
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|
854 }
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855
|
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856 static inline int
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857 __gthread_cond_signal (__gthread_cond_t *__cond)
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|
858 {
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|
|
859 return __gthrw_(pthread_cond_signal) (__cond);
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|
|
860 }
|
|
|
861
|
|
|
862 static inline int
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|
|
863 __gthread_cond_wait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex)
|
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|
864 {
|
|
|
865 return __gthrw_(pthread_cond_wait) (__cond, __mutex);
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|
866 }
|
|
|
867
|
|
|
868 static inline int
|
|
|
869 __gthread_cond_timedwait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex,
|
|
|
870 const __gthread_time_t *__abs_timeout)
|
|
|
871 {
|
|
|
872 return __gthrw_(pthread_cond_timedwait) (__cond, __mutex, __abs_timeout);
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|
|
873 }
|
|
|
874
|
|
|
875 static inline int
|
|
|
876 __gthread_cond_wait_recursive (__gthread_cond_t *__cond,
|
|
|
877 __gthread_recursive_mutex_t *__mutex)
|
|
|
878 {
|
|
|
879 return __gthread_cond_wait (__cond, __mutex);
|
|
|
880 }
|
|
|
881
|
|
|
882 static inline int
|
|
|
883 __gthread_cond_destroy (__gthread_cond_t* __cond)
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|
884 {
|
|
|
885 return __gthrw_(pthread_cond_destroy) (__cond);
|
|
|
886 }
|
|
|
887
|
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|
888 #endif /* _LIBOBJC */
|
|
|
889
|
|
|
890 #endif /* ! GCC_GTHR_POSIX_H */
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