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/* Destroy a semaphore. Generic version.
Copyright (C) 2005-2022 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 <semaphore.h>
#include <errno.h>
#include <pt-internal.h>
int
__sem_destroy (sem_t *sem)
{
struct new_sem *isem = (struct new_sem *) sem;
if (
#if __HAVE_64B_ATOMICS
atomic_load_relaxed (&isem->data) >> SEM_NWAITERS_SHIFT
#else
atomic_load_relaxed (&isem->value) & SEM_NWAITERS_MASK
|| isem->nwaiters
#endif
)
/* There are threads waiting on *SEM. */
{
errno = EBUSY;
return -1;
}
return 0;
}
strong_alias (__sem_destroy, sem_destroy);
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