1 /* Threads compatibility routines for libgcc2. */ 2 /* Compile this one with gcc. */ 3 /* Copyright (C) 1997, 1998, 2004, 2008, 2009, 2011 4 Free Software Foundation, Inc. 5 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free 10 Software Foundation; either version 3, or (at your option) any later 11 version. 12 13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 for more details. 17 18 Under Section 7 of GPL version 3, you are granted additional 19 permissions described in the GCC Runtime Library Exception, version 20 3.1, as published by the Free Software Foundation. 21 22 You should have received a copy of the GNU General Public License and 23 a copy of the GCC Runtime Library Exception along with this program; 24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 25 <http://www.gnu.org/licenses/>. */ 26 27 #ifndef _GLIBCXX_GCC_GTHR_H 28 #define _GLIBCXX_GCC_GTHR_H 29 30 #ifndef _GLIBCXX_HIDE_EXPORTS 31 #pragma GCC visibility push(default) 32 #endif 33 34 /* If this file is compiled with threads support, it must 35 #define __GTHREADS 1 36 to indicate that threads support is present. Also it has define 37 function 38 int __gthread_active_p () 39 that returns 1 if thread system is active, 0 if not. 40 41 The threads interface must define the following types: 42 __gthread_key_t 43 __gthread_once_t 44 __gthread_mutex_t 45 __gthread_recursive_mutex_t 46 47 The threads interface must define the following macros: 48 49 __GTHREAD_ONCE_INIT 50 to initialize __gthread_once_t 51 __GTHREAD_MUTEX_INIT 52 to initialize __gthread_mutex_t to get a fast 53 non-recursive mutex. 54 __GTHREAD_MUTEX_INIT_FUNCTION 55 some systems can't initialize a mutex without a 56 function call. On such systems, define this to a 57 function which looks like this: 58 void __GTHREAD_MUTEX_INIT_FUNCTION (__gthread_mutex_t *) 59 Don't define __GTHREAD_MUTEX_INIT in this case 60 __GTHREAD_RECURSIVE_MUTEX_INIT 61 __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION 62 as above, but for a recursive mutex. 63 64 The threads interface must define the following static functions: 65 66 int __gthread_once (__gthread_once_t *once, void (*func) ()) 67 68 int __gthread_key_create (__gthread_key_t *keyp, void (*dtor) (void *)) 69 int __gthread_key_delete (__gthread_key_t key) 70 71 void *__gthread_getspecific (__gthread_key_t key) 72 int __gthread_setspecific (__gthread_key_t key, const void *ptr) 73 74 int __gthread_mutex_destroy (__gthread_mutex_t *mutex); 75 76 int __gthread_mutex_lock (__gthread_mutex_t *mutex); 77 int __gthread_mutex_trylock (__gthread_mutex_t *mutex); 78 int __gthread_mutex_unlock (__gthread_mutex_t *mutex); 79 80 int __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex); 81 int __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex); 82 int __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex); 83 84 The following are supported in POSIX threads only. They are required to 85 fix a deadlock in static initialization inside libsupc++. The header file 86 gthr-posix.h defines a symbol __GTHREAD_HAS_COND to signify that these extra 87 features are supported. 88 89 Types: 90 __gthread_cond_t 91 92 Macros: 93 __GTHREAD_COND_INIT 94 __GTHREAD_COND_INIT_FUNCTION 95 96 Interface: 97 int __gthread_cond_broadcast (__gthread_cond_t *cond); 98 int __gthread_cond_wait (__gthread_cond_t *cond, __gthread_mutex_t *mutex); 99 int __gthread_cond_wait_recursive (__gthread_cond_t *cond, 100 __gthread_recursive_mutex_t *mutex); 101 102 All functions returning int should return zero on success or the error 103 number. If the operation is not supported, -1 is returned. 104 105 If the following are also defined, you should 106 #define __GTHREADS_CXX0X 1 107 to enable the c++0x thread library. 108 109 Types: 110 __gthread_t 111 __gthread_time_t 112 113 Interface: 114 int __gthread_create (__gthread_t *thread, void *(*func) (void*), 115 void *args); 116 int __gthread_join (__gthread_t thread, void **value_ptr); 117 int __gthread_detach (__gthread_t thread); 118 int __gthread_equal (__gthread_t t1, __gthread_t t2); 119 __gthread_t __gthread_self (void); 120 int __gthread_yield (void); 121 122 int __gthread_mutex_timedlock (__gthread_mutex_t *m, 123 const __gthread_time_t *abs_timeout); 124 int __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *m, 125 const __gthread_time_t *abs_time); 126 127 int __gthread_cond_signal (__gthread_cond_t *cond); 128 int __gthread_cond_timedwait (__gthread_cond_t *cond, 129 __gthread_mutex_t *mutex, 130 const __gthread_time_t *abs_timeout); 131 int __gthread_cond_timedwait_recursive (__gthread_cond_t *cond, 132 __gthread_recursive_mutex_t *mutex, 133 const __gthread_time_t *abs_time) 134 135 */ 136 137 #if __GXX_WEAK__ 138 /* The pe-coff weak support isn't fully compatible to ELF's weak. 139 For static libraries it might would work, but as we need to deal 140 with shared versions too, we disable it for mingw-targets. */ 141 #ifdef _GLIBCXX___MINGW32_GLIBCXX___ 142 #undef _GLIBCXX_GTHREAD_USE_WEAK 143 #define _GLIBCXX_GTHREAD_USE_WEAK 0 144 #endif 145 146 #ifndef _GLIBCXX_GTHREAD_USE_WEAK 147 #define _GLIBCXX_GTHREAD_USE_WEAK 1 148 #endif 149 #endif 150 #include <bits/gthr-default.h> 151 152 #ifndef _GLIBCXX_HIDE_EXPORTS 153 #pragma GCC visibility pop 154 #endif 155 156 #endif /* ! _GLIBCXX_GCC_GTHR_H */ 157
