semaphore.h

来自「GNU Hurd 源代码」· C头文件 代码 · 共 44 行

/* Semaphore type.  Generic version.
   Copyright (C) 2005 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef _BITS_SEMAPHORE_H
#define _BITS_SEMAPHORE_H	1

#ifndef _SEMAPHORE_H
#error Never include <bits/semaphore.h> directly.
#endif

#include <pthread.h>

/* User visible part of a semaphore.  */
struct __semaphore
  {
    __pthread_spinlock_t __lock;
    struct __pthread *__queue;
    int __pshared;
    int __value;
    void *__data;
  };

/* Initializer for a semaphore.  */
#define __SEMAPHORE_INITIALIZER(pshared, value) \
  { __SPIN_LOCK_INITIALIZER, NULL, (pshared), (value), NULL }

#endif /* bits/mutex.h */