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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [gthr.h] - Rev 816
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/* Threads compatibility routines for libgcc2. */ /* Compile this one with gcc. */ /* Copyright (C) 1997, 1998, 2004 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 2, 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. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING. If not, write to the Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* As a special exception, if you link this library with other files, some of which are compiled with GCC, to produce an executable, this library does not by itself cause the resulting executable to be covered by the GNU General Public License. This exception does not however invalidate any other reasons why the executable file might be covered by the GNU General Public License. */ #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_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); All functions returning int should return zero on success or the error number. If the operation is not supported, -1 is returned. 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 */