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/* Semaphore type. Generic version.
Copyright (C) 2005-2019 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/>. */
#ifndef _BITS_SEMAPHORE_H
#define _BITS_SEMAPHORE_H 1
#ifndef _SEMAPHORE_H
# error Never include <bits/semaphore.h> directly.
#endif
#include <bits/types/__pthread_spinlock_t.h>
#include <bits/pthread.h>
/* User visible part of a semaphore. */
struct __semaphore
{
__pthread_spinlock_t __lock;
struct __pthread *__queue;
int __pshared;
int __value;
void *__data;
};
typedef struct __semaphore sem_t;
#define SEM_FAILED ((void *) 0)
/* Initializer for a semaphore. */
#define __SEMAPHORE_INITIALIZER(pshared, value) \
{ __PTHREAD_SPIN_LOCK_INITIALIZER, NULL, (pshared), (value), NULL }
#endif /* bits/semaphore.h */
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