pthread_mutexattr_setprotocol.c 1.4 KB

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  1. /* Change priority protocol setting in pthread_mutexattr_t.
  2. Copyright (C) 2006 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
  5. The GNU C Library is free software; you can redistribute it and/or
  6. modify it under the terms of the GNU Lesser General Public
  7. License as published by the Free Software Foundation; either
  8. version 2.1 of the License, or (at your option) any later version.
  9. The GNU C Library 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. You should have received a copy of the GNU Lesser General Public
  14. License along with the GNU C Library; if not, see
  15. <http://www.gnu.org/licenses/>. */
  16. #include <errno.h>
  17. #include <pthreadP.h>
  18. int
  19. pthread_mutexattr_setprotocol (
  20. pthread_mutexattr_t *attr,
  21. int protocol)
  22. {
  23. if (protocol != PTHREAD_PRIO_NONE
  24. && protocol != PTHREAD_PRIO_INHERIT
  25. && __builtin_expect (protocol != PTHREAD_PRIO_PROTECT, 0))
  26. return EINVAL;
  27. struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr;
  28. iattr->mutexkind = ((iattr->mutexkind & ~PTHREAD_MUTEXATTR_PROTOCOL_MASK)
  29. | (protocol << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT));
  30. return 0;
  31. }