ffmpeg/libavutil/thread.h

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 // This header should only be used to simplify code where
  20 // threading is optional, not as a generic threading abstraction.
  21
  22 #ifndef AVUTIL_THREAD_H
  23 #define AVUTIL_THREAD_H
  24
  25 #include "config.h"
  26
  27 #if HAVE_PTHREADS || HAVE_W32THREADS || HAVE_OS2THREADS
  28
  29 #define USE_ATOMICS 0
  30
  31 #if HAVE_PTHREADS
  32 #include <pthread.h>
  33 #elif HAVE_OS2THREADS
  34 #include "compat/os2threads.h"
  35 #else
  36 #include "compat/w32pthreads.h"
  37 #endif
  38
  39 #define AVMutex pthread_mutex_t
  40
  41 #define ff_mutex_init    pthread_mutex_init
  42 #define ff_mutex_lock    pthread_mutex_lock
  43 #define ff_mutex_unlock  pthread_mutex_unlock
  44 #define ff_mutex_destroy pthread_mutex_destroy
  45
  46 #else
  47
  48 #define USE_ATOMICS 1
  49
  50 #define AVMutex char
  51
  52 #define ff_mutex_init(mutex, attr) (0)
  53 #define ff_mutex_lock(mutex) (0)
  54 #define ff_mutex_unlock(mutex) (0)
  55 #define ff_mutex_destroy(mutex) (0)
  56
  57 #endif
  58
  59 #endif /* AVUTIL_THREAD_H */