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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [gthr.h] - Rev 310
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/* Threads compatibility routines for libgcc2. */ /* Compile this one with gcc. */ /* Copyright (C) 1997, 1998, 2004, 2008, 2009 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ #ifndef GCC_GTHR_H #define GCC_GTHR_H #ifndef HIDE_EXPORTS #pragma GCC visibility push(default) #endif /* If this file is compiled with threads support, it must #define __GTHREADS 1 to indicate that threads support is present. Also it has define function int __gthread_active_p () that returns 1 if thread system is active, 0 if not. The threads interface must define the following types: __gthread_key_t __gthread_once_t __gthread_mutex_t __gthread_recursive_mutex_t The threads interface must define the following macros: __GTHREAD_ONCE_INIT to initialize __gthread_once_t __GTHREAD_MUTEX_INIT to initialize __gthread_mutex_t to get a fast non-recursive mutex. __GTHREAD_MUTEX_INIT_FUNCTION some systems can't initialize a mutex without a function call. On such systems, define this to a function which looks like this: void __GTHREAD_MUTEX_INIT_FUNCTION (__gthread_mutex_t *) Don't define __GTHREAD_MUTEX_INIT in this case __GTHREAD_RECURSIVE_MUTEX_INIT __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION as above, but for a recursive mutex. The threads interface must define the following static functions: int __gthread_once (__gthread_once_t *once, void (*func) ()) int __gthread_key_create (__gthread_key_t *keyp, void (*dtor) (void *)) int __gthread_key_delete (__gthread_key_t key) void *__gthread_getspecific (__gthread_key_t key) int __gthread_setspecific (__gthread_key_t key, const void *ptr) int __gthread_mutex_destroy (__gthread_mutex_t *mutex); int __gthread_mutex_lock (__gthread_mutex_t *mutex); int __gthread_mutex_trylock (__gthread_mutex_t *mutex); int __gthread_mutex_unlock (__gthread_mutex_t *mutex); int __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex); int __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex); int __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex); The following are supported in POSIX threads only. They are required to fix a deadlock in static initialization inside libsupc++. The header file gthr-posix.h defines a symbol __GTHREAD_HAS_COND to signify that these extra features are supported. Types: __gthread_cond_t Macros: __GTHREAD_COND_INIT __GTHREAD_COND_INIT_FUNCTION Interface: int __gthread_cond_broadcast (__gthread_cond_t *cond); int __gthread_cond_wait (__gthread_cond_t *cond, __gthread_mutex_t *mutex); int __gthread_cond_wait_recursive (__gthread_cond_t *cond, __gthread_recursive_mutex_t *mutex); All functions returning int should return zero on success or the error number. If the operation is not supported, -1 is returned. If the following are also defined, you should #define __GTHREADS_CXX0X 1 to enable the c++0x thread library. Types: __gthread_t __gthread_time_t Interface: int __gthread_create (__gthread_t *thread, void *(*func) (void*), void *args); int __gthread_join (__gthread_t thread, void **value_ptr); int __gthread_detach (__gthread_t thread); int __gthread_equal (__gthread_t t1, __gthread_t t2); __gthread_t __gthread_self (void); int __gthread_yield (void); int __gthread_mutex_timedlock (__gthread_mutex_t *m, const __gthread_time_t *abs_timeout); int __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *m, const __gthread_time_t *abs_time); int __gthread_cond_signal (__gthread_cond_t *cond); int __gthread_cond_timedwait (__gthread_cond_t *cond, __gthread_mutex_t *mutex, const __gthread_time_t *abs_timeout); int __gthread_cond_timedwait_recursive (__gthread_cond_t *cond, __gthread_recursive_mutex_t *mutex, const __gthread_time_t *abs_time) Currently supported threads packages are TPF threads with -D__tpf__ POSIX/Unix98 threads with -D_PTHREADS POSIX/Unix95 threads with -D_PTHREADS95 DCE threads with -D_DCE_THREADS Solaris/UI threads with -D_SOLARIS_THREADS */ /* Check first for thread specific defines. */ #if defined (__tpf__) #include "gthr-tpf.h" #elif _PTHREADS #include "gthr-posix.h" #elif _PTHREADS95 #include "gthr-posix95.h" #elif _DCE_THREADS #include "gthr-dce.h" #elif _SOLARIS_THREADS #include "gthr-solaris.h" /* Include GTHREAD_FILE if one is defined. */ #elif defined(HAVE_GTHR_DEFAULT) #if SUPPORTS_WEAK #ifndef GTHREAD_USE_WEAK #define GTHREAD_USE_WEAK 1 #endif #endif #include "gthr-default.h" /* Fallback to single thread definitions. */ #else #include "gthr-single.h" #endif #ifndef HIDE_EXPORTS #pragma GCC visibility pop #endif #endif /* ! GCC_GTHR_H */
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