semaphore.h 1.0 KB

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  1. /* Copyright (C) 2002-2017 Free Software Foundation, Inc.
  2. The GNU C Library is free software; you can redistribute it and/or
  3. modify it under the terms of the GNU Lesser General Public
  4. License as published by the Free Software Foundation; either
  5. version 2.1 of the License, or (at your option) any later version.
  6. The GNU C Library is distributed in the hope that it will be useful,
  7. but WITHOUT ANY WARRANTY; without even the implied warranty of
  8. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  9. Lesser General Public License for more details.
  10. You should have received a copy of the GNU Lesser General Public
  11. License along with the GNU C Library; if not, see
  12. <http://www.gnu.org/licenses/>. */
  13. #ifndef _SEMAPHORE_H
  14. # error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
  15. #endif
  16. #define __SIZEOF_SEM_T 32
  17. /* Value returned if `sem_open' failed. */
  18. #define SEM_FAILED ((sem_t *) 0)
  19. typedef union
  20. {
  21. char __size[__SIZEOF_SEM_T];
  22. long long int __align;
  23. } sem_t;