/External/Mysql-5.0/include/atomic/gcc_builtins.h

http://awoe.googlecode.com/ · C++ Header · 38 lines · 20 code · 4 blank · 14 comment · 2 complexity · 19ac3ac62851d1182ed6d994d9a79dcb MD5 · raw file

  1. /* Copyright (C) 2008 MySQL AB
  2. This program is free software; you can redistribute it and/or modify
  3. it under the terms of the GNU General Public License as published by
  4. the Free Software Foundation; version 2 of the License.
  5. This program is distributed in the hope that it will be useful,
  6. but WITHOUT ANY WARRANTY; without even the implied warranty of
  7. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  8. GNU General Public License for more details.
  9. You should have received a copy of the GNU General Public License
  10. along with this program; if not, write to the Free Software
  11. Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
  12. #define MY_ATOMIC_MODE "atomic_builtins"
  13. #define make_atomic_add_body(S) \
  14. v= __sync_fetch_and_add(a, v);
  15. #define make_atomic_swap_body(S) \
  16. v= __sync_lock_test_and_set(a, v);
  17. #define make_atomic_cas_body(S) \
  18. int ## S sav; \
  19. sav= __sync_val_compare_and_swap(a, *cmp, set); \
  20. if (!(ret= (sav == *cmp))) *cmp= sav;
  21. #ifdef MY_ATOMIC_MODE_DUMMY
  22. #define make_atomic_load_body(S) ret= *a
  23. #define make_atomic_store_body(S) *a= v
  24. #define MY_ATOMIC_MODE "gcc-builtins-up"
  25. #else
  26. #define MY_ATOMIC_MODE "gcc-builtins-smp"
  27. #define make_atomic_load_body(S) \
  28. ret= __sync_fetch_and_or(a, 0);
  29. #define make_atomic_store_body(S) \
  30. (void) __sync_lock_test_and_set(a, v);
  31. #endif