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- /* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #include <errno.h>
- #include "pthreadP.h"
- int
- __pthread_cond_destroy (cond)
- pthread_cond_t *cond;
- {
- /* Make sure we are alone. */
- lll_mutex_lock (cond->__data.__lock);
- if (cond->__data.__total_seq > cond->__data.__wakeup_seq)
- {
- /* If there are still some waiters which have not been
- woken up, this is an application bug. */
- lll_mutex_unlock (cond->__data.__lock);
- return EBUSY;
- }
- /* Tell pthread_cond_*wait that this condvar is being destroyed. */
- cond->__data.__total_seq = -1ULL;
- /* If there are waiters which have been already signalled or
- broadcasted, but still are using the pthread_cond_t structure,
- pthread_cond_destroy needs to wait for them. */
- unsigned int nwaiters = cond->__data.__nwaiters;
- while (nwaiters >= (1 << COND_CLOCK_BITS))
- {
- lll_mutex_unlock (cond->__data.__lock);
- lll_futex_wait (&cond->__data.__nwaiters, nwaiters);
- lll_mutex_lock (cond->__data.__lock);
- nwaiters = cond->__data.__nwaiters;
- }
- return 0;
- }
- weak_alias(__pthread_cond_destroy, pthread_cond_destroy)
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