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-rw-r--r--libpthread/nptl/pthread_cond_destroy.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/libpthread/nptl/pthread_cond_destroy.c b/libpthread/nptl/pthread_cond_destroy.c
new file mode 100644
index 000000000..b7842d258
--- /dev/null
+++ b/libpthread/nptl/pthread_cond_destroy.c
@@ -0,0 +1,59 @@
+/* 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)