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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [gthr.h] - Blame information for rev 847

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1 280 jeremybenn
/* Threads compatibility routines for libgcc2.  */
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/* Compile this one with gcc.  */
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/* Copyright (C) 1997, 1998, 2004, 2008, 2009 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
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<http://www.gnu.org/licenses/>.  */
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#ifndef GCC_GTHR_H
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#define GCC_GTHR_H
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#ifndef HIDE_EXPORTS
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#pragma GCC visibility push(default)
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#endif
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/* If this file is compiled with threads support, it must
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       #define __GTHREADS 1
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   to indicate that threads support is present.  Also it has define
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   function
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     int __gthread_active_p ()
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   that returns 1 if thread system is active, 0 if not.
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   The threads interface must define the following types:
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     __gthread_key_t
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     __gthread_once_t
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     __gthread_mutex_t
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     __gthread_recursive_mutex_t
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   The threads interface must define the following macros:
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     __GTHREAD_ONCE_INIT
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                to initialize __gthread_once_t
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     __GTHREAD_MUTEX_INIT
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                to initialize __gthread_mutex_t to get a fast
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                non-recursive mutex.
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     __GTHREAD_MUTEX_INIT_FUNCTION
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                some systems can't initialize a mutex without a
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                function call.  On such systems, define this to a
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                function which looks like this:
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                  void __GTHREAD_MUTEX_INIT_FUNCTION (__gthread_mutex_t *)
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                Don't define __GTHREAD_MUTEX_INIT in this case
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     __GTHREAD_RECURSIVE_MUTEX_INIT
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     __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION
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                as above, but for a recursive mutex.
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   The threads interface must define the following static functions:
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     int __gthread_once (__gthread_once_t *once, void (*func) ())
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     int __gthread_key_create (__gthread_key_t *keyp, void (*dtor) (void *))
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     int __gthread_key_delete (__gthread_key_t key)
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     void *__gthread_getspecific (__gthread_key_t key)
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     int __gthread_setspecific (__gthread_key_t key, const void *ptr)
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     int __gthread_mutex_destroy (__gthread_mutex_t *mutex);
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     int __gthread_mutex_lock (__gthread_mutex_t *mutex);
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     int __gthread_mutex_trylock (__gthread_mutex_t *mutex);
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     int __gthread_mutex_unlock (__gthread_mutex_t *mutex);
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     int __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex);
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     int __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex);
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     int __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex);
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   The following are supported in POSIX threads only. They are required to
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   fix a deadlock in static initialization inside libsupc++. The header file
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   gthr-posix.h defines a symbol __GTHREAD_HAS_COND to signify that these extra
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   features are supported.
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   Types:
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     __gthread_cond_t
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   Macros:
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     __GTHREAD_COND_INIT
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     __GTHREAD_COND_INIT_FUNCTION
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   Interface:
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     int __gthread_cond_broadcast (__gthread_cond_t *cond);
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     int __gthread_cond_wait (__gthread_cond_t *cond, __gthread_mutex_t *mutex);
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     int __gthread_cond_wait_recursive (__gthread_cond_t *cond,
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                                        __gthread_recursive_mutex_t *mutex);
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   All functions returning int should return zero on success or the error
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   number.  If the operation is not supported, -1 is returned.
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   If the following are also defined, you should
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     #define __GTHREADS_CXX0X 1
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   to enable the c++0x thread library.
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   Types:
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     __gthread_t
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     __gthread_time_t
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   Interface:
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     int __gthread_create (__gthread_t *thread, void *(*func) (void*),
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                           void *args);
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     int __gthread_join (__gthread_t thread, void **value_ptr);
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     int __gthread_detach (__gthread_t thread);
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     int __gthread_equal (__gthread_t t1, __gthread_t t2);
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     __gthread_t __gthread_self (void);
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     int __gthread_yield (void);
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     int __gthread_mutex_timedlock (__gthread_mutex_t *m,
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                                    const __gthread_time_t *abs_timeout);
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     int __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *m,
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                                          const __gthread_time_t *abs_time);
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     int __gthread_cond_signal (__gthread_cond_t *cond);
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     int __gthread_cond_timedwait (__gthread_cond_t *cond,
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                                   __gthread_mutex_t *mutex,
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                                   const __gthread_time_t *abs_timeout);
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     int __gthread_cond_timedwait_recursive (__gthread_cond_t *cond,
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                                             __gthread_recursive_mutex_t *mutex,
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                                             const __gthread_time_t *abs_time)
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   Currently supported threads packages are
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     TPF threads with -D__tpf__
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     POSIX/Unix98 threads with -D_PTHREADS
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     POSIX/Unix95 threads with -D_PTHREADS95
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     DCE threads with -D_DCE_THREADS
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     Solaris/UI threads with -D_SOLARIS_THREADS
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*/
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/* Check first for thread specific defines.  */
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#if defined (__tpf__)
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#include "gthr-tpf.h"
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#elif _PTHREADS
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#include "gthr-posix.h"
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#elif _PTHREADS95
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#include "gthr-posix95.h"
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#elif _DCE_THREADS
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#include "gthr-dce.h"
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#elif _SOLARIS_THREADS
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#include "gthr-solaris.h"
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/* Include GTHREAD_FILE if one is defined.  */
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#elif defined(HAVE_GTHR_DEFAULT)
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#if SUPPORTS_WEAK
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#ifndef GTHREAD_USE_WEAK
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#define GTHREAD_USE_WEAK 1
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#endif
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#endif
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#include "gthr-default.h"
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/* Fallback to single thread definitions.  */
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#else
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#include "gthr-single.h"
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#endif
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#ifndef HIDE_EXPORTS
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#pragma GCC visibility pop
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#endif
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#endif /* ! GCC_GTHR_H */

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