atomic_win32.h 1.7 KB

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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. #ifndef AVUTIL_ATOMIC_WIN32_H
  21. #define AVUTIL_ATOMIC_WIN32_H
  22. #include <windows.h>
  23. #define avpriv_atomic_int_get atomic_int_get_win32
  24. static inline int atomic_int_get_win32(volatile int *ptr)
  25. {
  26. MemoryBarrier();
  27. return *ptr;
  28. }
  29. #define avpriv_atomic_int_set atomic_int_set_win32
  30. static inline void atomic_int_set_win32(volatile int *ptr, int val)
  31. {
  32. *ptr = val;
  33. MemoryBarrier();
  34. }
  35. #define avpriv_atomic_int_add_and_fetch atomic_int_add_and_fetch_win32
  36. static inline int atomic_int_add_and_fetch_win32(volatile int *ptr, int inc)
  37. {
  38. return inc + InterlockedExchangeAdd(ptr, inc);
  39. }
  40. #define avpriv_atomic_ptr_cas atomic_ptr_cas_win32
  41. static inline void *atomic_ptr_cas_win32(void * volatile *ptr,
  42. void *oldval, void *newval)
  43. {
  44. return InterlockedCompareExchangePointer(ptr, newval, oldval);
  45. }
  46. #endif /* AVUTIL_ATOMIC_WIN32_H */