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/* pthread_cond_destroy. Generic version.
Copyright (C) 2002-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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, see
<https://www.gnu.org/licenses/>. */
#include <pthread.h>
#include <pt-internal.h>
int
__pthread_cond_destroy (pthread_cond_t *cond)
{
/* Set the wake request flag. */
unsigned int wrefs = atomic_fetch_or_acquire (&cond->__wrefs, 1);
__pthread_spin_wait (&cond->__lock);
if (cond->__queue)
{
__pthread_spin_unlock (&cond->__lock);
return EBUSY;
}
__pthread_spin_unlock (&cond->__lock);
while (wrefs >> 1 != 0)
{
__gsync_wait (__mach_task_self (), (vm_offset_t) &cond->__wrefs, wrefs,
0, 0, 0);
wrefs = atomic_load_acquire (&cond->__wrefs);
}
/* The memory the condvar occupies can now be reused. */
return 0;
}
weak_alias (__pthread_cond_destroy, pthread_cond_destroy);
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