f05021f3f4
* commit 'c53e796f8b69799b7ad6d28fbab981d37edf1bc9': thread: Provide no-op variants for pthread_once Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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// This header should only be used to simplify code where
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// threading is optional, not as a generic threading abstraction.
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#ifndef AVUTIL_THREAD_H
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#define AVUTIL_THREAD_H
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#include "config.h"
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#if HAVE_PTHREADS || HAVE_W32THREADS || HAVE_OS2THREADS
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#define USE_ATOMICS 0
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#if HAVE_PTHREADS
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#include <pthread.h>
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#elif HAVE_OS2THREADS
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#include "compat/os2threads.h"
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#else
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#include "compat/w32pthreads.h"
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#endif
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#define AVMutex pthread_mutex_t
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#define ff_mutex_init pthread_mutex_init
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#define ff_mutex_lock pthread_mutex_lock
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#define ff_mutex_unlock pthread_mutex_unlock
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#define ff_mutex_destroy pthread_mutex_destroy
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#define AVOnce pthread_once_t
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#define AV_ONCE_INIT PTHREAD_ONCE_INIT
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#define ff_thread_once(control, routine) pthread_once(control, routine)
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#else
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#define USE_ATOMICS 1
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#define AVMutex char
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#define ff_mutex_init(mutex, attr) (0)
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#define ff_mutex_lock(mutex) (0)
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#define ff_mutex_unlock(mutex) (0)
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#define ff_mutex_destroy(mutex) (0)
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#define AVOnce char
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#define AV_ONCE_INIT 0
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static inline int ff_thread_once(char *control, void (*routine)(void))
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{
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if (!*control) {
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routine();
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*control = 1;
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}
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return 0;
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}
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#endif
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#endif /* AVUTIL_THREAD_H */
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