48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/* pthread_cond_destroy. Generic version.
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Copyright (C) 2002-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <pt-internal.h>
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int
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__pthread_cond_destroy (pthread_cond_t *cond)
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{
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/* Set the wake request flag. */
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unsigned int wrefs = atomic_fetch_or_acquire (&cond->__wrefs, 1);
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__pthread_spin_wait (&cond->__lock);
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if (cond->__queue)
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{
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__pthread_spin_unlock (&cond->__lock);
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return EBUSY;
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}
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__pthread_spin_unlock (&cond->__lock);
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while (wrefs >> 1 != 0)
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{
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__gsync_wait (__mach_task_self (), (vm_offset_t) &cond->__wrefs, wrefs,
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0, 0, 0);
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wrefs = atomic_load_acquire (&cond->__wrefs);
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}
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/* The memory the condvar occupies can now be reused. */
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return 0;
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}
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weak_alias (__pthread_cond_destroy, pthread_cond_destroy);
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