pthread_mutexattr_setrobust.c 1.6 KB

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  1. /* Copyright (C) 2005, 2010 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. Contributed by Ulrich Drepper <drepper@redhat.com>, 2005.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #include <errno.h>
  17. #include <pthreadP.h>
  18. int
  19. pthread_mutexattr_setrobust (
  20. pthread_mutexattr_t *attr,
  21. int robustness)
  22. {
  23. if (robustness != PTHREAD_MUTEX_STALLED_NP
  24. && __builtin_expect (robustness != PTHREAD_MUTEX_ROBUST_NP, 0))
  25. return EINVAL;
  26. struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr;
  27. /* We use bit 30 to signal whether the mutex is going to be
  28. robust or not. */
  29. if (robustness == PTHREAD_MUTEX_STALLED_NP)
  30. iattr->mutexkind &= ~PTHREAD_MUTEXATTR_FLAG_ROBUST;
  31. else
  32. iattr->mutexkind |= PTHREAD_MUTEXATTR_FLAG_ROBUST;
  33. return 0;
  34. }
  35. weak_alias (pthread_mutexattr_setrobust, pthread_mutexattr_setrobust_np)