48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/* Semaphore type. Generic version.
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Copyright (C) 2005-2018 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifndef _BITS_SEMAPHORE_H
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#define _BITS_SEMAPHORE_H 1
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#ifndef _SEMAPHORE_H
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# error Never include <bits/semaphore.h> directly.
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#endif
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#include <bits/types/__pthread_spinlock_t.h>
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#include <bits/pthread.h>
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/* User visible part of a semaphore. */
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struct __semaphore
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{
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__pthread_spinlock_t __lock;
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struct __pthread *__queue;
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int __pshared;
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int __value;
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void *__data;
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};
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typedef struct __semaphore sem_t;
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#define SEM_FAILED ((void *) 0)
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/* Initializer for a semaphore. */
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#define __SEMAPHORE_INITIALIZER(pshared, value) \
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{ __PTHREAD_SPIN_LOCK_INITIALIZER, NULL, (pshared), (value), NULL }
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#endif /* bits/semaphore.h */
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