1 /* Threads compatibility routines for libgcc2. */ 2 /* Compile this one with gcc. */ 3 /* Copyright (C) 1997, 1998, 2004, 2008, 2009 Free Software Foundation, Inc. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 3, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 Under Section 7 of GPL version 3, you are granted additional 18 permissions described in the GCC Runtime Library Exception, version 19 3.1, as published by the Free Software Foundation. 20 21 You should have received a copy of the GNU General Public License and 22 a copy of the GCC Runtime Library Exception along with this program; 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 <http://www.gnu.org/licenses/>. */ 25 26 #ifndef _GLIBCXX_GCC_GTHR_H 27 #define _GLIBCXX_GCC_GTHR_H 28 29 #ifndef _GLIBCXX_HIDE_EXPORTS 30 #pragma GCC visibility push(default) 31 #endif 32 33 /* If this file is compiled with threads support, it must 34 #define __GTHREADS 1 35 to indicate that threads support is present. Also it has define 36 function 37 int __gthread_active_p () 38 that returns 1 if thread system is active, 0 if not. 39 40 The threads interface must define the following types: 41 __gthread_key_t 42 __gthread_once_t 43 __gthread_mutex_t 44 __gthread_recursive_mutex_t 45 46 The threads interface must define the following macros: 47 48 __GTHREAD_ONCE_INIT 49 to initialize __gthread_once_t 50 __GTHREAD_MUTEX_INIT 51 to initialize __gthread_mutex_t to get a fast 52 non-recursive mutex. 53 __GTHREAD_MUTEX_INIT_FUNCTION 54 some systems can't initialize a mutex without a 55 function call. On such systems, define this to a 56 function which looks like this: 57 void __GTHREAD_MUTEX_INIT_FUNCTION (__gthread_mutex_t *) 58 Don't define __GTHREAD_MUTEX_INIT in this case 59 __GTHREAD_RECURSIVE_MUTEX_INIT 60 __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION 61 as above, but for a recursive mutex. 62 63 The threads interface must define the following static functions: 64 65 int __gthread_once (__gthread_once_t *once, void (*func) ()) 66 67 int __gthread_key_create (__gthread_key_t *keyp, void (*dtor) (void *)) 68 int __gthread_key_delete (__gthread_key_t key) 69 70 void *__gthread_getspecific (__gthread_key_t key) 71 int __gthread_setspecific (__gthread_key_t key, const void *ptr) 72 73 int __gthread_mutex_destroy (__gthread_mutex_t *mutex); 74 75 int __gthread_mutex_lock (__gthread_mutex_t *mutex); 76 int __gthread_mutex_trylock (__gthread_mutex_t *mutex); 77 int __gthread_mutex_unlock (__gthread_mutex_t *mutex); 78 79 int __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex); 80 int __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex); 81 int __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex); 82 83 The following are supported in POSIX threads only. They are required to 84 fix a deadlock in static initialization inside libsupc++. The header file 85 gthr-posix.h defines a symbol __GTHREAD_HAS_COND to signify that these extra 86 features are supported. 87 88 Types: 89 __gthread_cond_t 90 91 Macros: 92 __GTHREAD_COND_INIT 93 __GTHREAD_COND_INIT_FUNCTION 94 95 Interface: 96 int __gthread_cond_broadcast (__gthread_cond_t *cond); 97 int __gthread_cond_wait (__gthread_cond_t *cond, __gthread_mutex_t *mutex); 98 int __gthread_cond_wait_recursive (__gthread_cond_t *cond, 99 __gthread_recursive_mutex_t *mutex); 100 101 All functions returning int should return zero on success or the error 102 number. If the operation is not supported, -1 is returned. 103 104 If the following are also defined, you should 105 #define __GTHREADS_CXX0X 1 106 to enable the c++0x thread library. 107 108 Types: 109 __gthread_t 110 __gthread_time_t 111 112 Interface: 113 int __gthread_create (__gthread_t *thread, void *(*func) (void*), 114 void *args); 115 int __gthread_join (__gthread_t thread, void **value_ptr); 116 int __gthread_detach (__gthread_t thread); 117 int __gthread_equal (__gthread_t t1, __gthread_t t2); 118 __gthread_t __gthread_self (void); 119 int __gthread_yield (void); 120 121 int __gthread_mutex_timedlock (__gthread_mutex_t *m, 122 const __gthread_time_t *abs_timeout); 123 int __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *m, 124 const __gthread_time_t *abs_time); 125 126 int __gthread_cond_signal (__gthread_cond_t *cond); 127 int __gthread_cond_timedwait (__gthread_cond_t *cond, 128 __gthread_mutex_t *mutex, 129 const __gthread_time_t *abs_timeout); 130 int __gthread_cond_timedwait_recursive (__gthread_cond_t *cond, 131 __gthread_recursive_mutex_t *mutex, 132 const __gthread_time_t *abs_time) 133 134 Currently supported threads packages are 135 TPF threads with -D__tpf__ 136 POSIX/Unix98 threads with -D_PTHREADS 137 POSIX/Unix95 threads with -D_PTHREADS95 138 DCE threads with -D_DCE_THREADS 139 Solaris/UI threads with -D_SOLARIS_THREADS 140 141 */ 142 143 /* Check first for thread specific defines. */ 144 #if defined (_GLIBCXX___tpf_GLIBCXX___) 145 #include <bits/gthr-tpf.h> 146 #elif _GLIBCXX__PTHREADS 147 #include <bits/gthr-posix.h> 148 #elif _GLIBCXX__PTHREADS95 149 #include <bits/gthr-posix95.h> 150 #elif _GLIBCXX__DCE_THREADS 151 #include <bits/gthr-dce.h> 152 #elif _GLIBCXX__SOLARIS_THREADS 153 #include <bits/gthr-solaris.h> 154 155 /* Include GTHREAD_FILE if one is defined. */ 156 #elif defined(_GLIBCXX_HAVE_GTHR_DEFAULT) 157 #if __GXX_WEAK__ 158 #ifndef _GLIBCXX_GTHREAD_USE_WEAK 159 #define _GLIBCXX_GTHREAD_USE_WEAK 1 160 #endif 161 #endif 162 #include <bits/gthr-default.h> 163 164 /* Fallback to single thread definitions. */ 165 #else 166 #include <bits/gthr-single.h> 167 #endif 168 169 #ifndef _GLIBCXX_HIDE_EXPORTS 170 #pragma GCC visibility pop 171 #endif 172 173 #endif /* ! _GLIBCXX_GCC_GTHR_H */ 174
