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  1. /*
  2.  * Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #ifndef AVUTIL_ATOMIC_WIN32_H
  22. #define AVUTIL_ATOMIC_WIN32_H
  23.  
  24. #define WIN32_LEAN_AND_MEAN
  25. #include <windows.h>
  26.  
  27. #define avpriv_atomic_int_get atomic_int_get_win32
  28. static inline int atomic_int_get_win32(volatile int *ptr)
  29. {
  30.     MemoryBarrier();
  31.     return *ptr;
  32. }
  33.  
  34. #define avpriv_atomic_int_set atomic_int_set_win32
  35. static inline void atomic_int_set_win32(volatile int *ptr, int val)
  36. {
  37.     *ptr = val;
  38.     MemoryBarrier();
  39. }
  40.  
  41. #define avpriv_atomic_int_add_and_fetch atomic_int_add_and_fetch_win32
  42. static inline int atomic_int_add_and_fetch_win32(volatile int *ptr, int inc)
  43. {
  44.     return inc + InterlockedExchangeAdd(ptr, inc);
  45. }
  46.  
  47. #define avpriv_atomic_ptr_cas atomic_ptr_cas_win32
  48. static inline void *atomic_ptr_cas_win32(void * volatile *ptr,
  49.                                          void *oldval, void *newval)
  50. {
  51.     return InterlockedCompareExchangePointer(ptr, newval, oldval);
  52. }
  53.  
  54. #endif /* AVUTIL_ATOMIC_WIN32_H */
  55.