106 lines
3.5 KiB
C
106 lines
3.5 KiB
C
/* Threads compatibily routines for libgcc2. */
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/* Compile this one with gcc. */
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/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* As a special exception, if you link this library with other files,
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some of which are compiled with GCC, to produce an executable,
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this library does not by itself cause the resulting executable
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to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License. */
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#ifndef __gthr_h
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#define __gthr_h
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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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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 initalize 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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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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int __gthread_key_dtor (__gthread_key_t key, void *ptr)
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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_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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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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Currently supported threads packages are
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POSIX threads with -D_PTHREADS
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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 _PTHREADS
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#include "gthr-posix.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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#endif /* not __gthr_h */
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