116 строки
3.7 KiB
C
116 строки
3.7 KiB
C
/*
|
|
* Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
|
|
*
|
|
* @APPLE_LICENSE_HEADER_START@
|
|
*
|
|
* This file contains Original Code and/or Modifications of Original Code
|
|
* as defined in and that are subject to the Apple Public Source License
|
|
* Version 2.0 (the 'License'). You may not use this file except in
|
|
* compliance with the License. Please obtain a copy of the License at
|
|
* http://www.opensource.apple.com/apsl/ and read it before using this
|
|
* file.
|
|
*
|
|
* The Original Code and all software distributed under the License are
|
|
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
|
|
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
|
|
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
|
|
* Please see the License for the specific language governing rights and
|
|
* limitations under the License.
|
|
*
|
|
* @APPLE_LICENSE_HEADER_END@
|
|
*/
|
|
/*
|
|
* Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
|
|
* All Rights Reserved
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software and
|
|
* its documentation for any purpose and without fee is hereby granted,
|
|
* provided that the above copyright notice appears in all copies and
|
|
* that both the copyright notice and this permission notice appear in
|
|
* supporting documentation.
|
|
*
|
|
* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
|
|
* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
|
|
* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
|
|
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
*/
|
|
/*
|
|
* MkLinux
|
|
*/
|
|
|
|
/*
|
|
* POSIX Threads - IEEE 1003.1c
|
|
*/
|
|
|
|
/*
|
|
* Changes from original file:
|
|
* Open MPI team, August 2005
|
|
*
|
|
* - changed include files to allow building without Darwin internal
|
|
* source files
|
|
*
|
|
* Changes marked with Open MPI comment in source code
|
|
*/
|
|
|
|
#ifndef _POSIX_PTHREAD_SPINLOCK_H
|
|
#define _POSIX_PTHREAD_SPINLOCK_H
|
|
|
|
#include <mach/mach.h>
|
|
#define __APPLE_API_PRIVATE
|
|
#if 0 /* Open MPI Change */
|
|
#include <machine/cpu_capabilities.h>
|
|
#endif /* Open MPI Change */
|
|
|
|
#ifndef __POSIX_LIB__
|
|
#define __POSIX_LIB__
|
|
#endif
|
|
|
|
#include "pthread_machdep.h" /* Machine-dependent definitions. */
|
|
|
|
/* Number of times to spin when the lock is unavailable and we are on a
|
|
multiprocessor. On a uniprocessor we yield the processor immediately. */
|
|
#define MP_SPIN_TRIES 1000
|
|
extern int _spin_tries;
|
|
extern int __is_threaded;
|
|
|
|
/* Internal mutex locks for data structures */
|
|
#define TRY_LOCK(v) (!__is_threaded || _spin_lock_try((pthread_lock_t *)&(v)))
|
|
|
|
/* _DO_SPINLOCK_LOCK() takes a (pthread_lock_t *) */
|
|
#define _DO_SPINLOCK_LOCK(v) _spin_lock(v)
|
|
|
|
/* _DO_SPINLOCK_UNLOCK() takes a (pthread_lock_t *) */
|
|
#define _DO_SPINLOCK_UNLOCK(v) _spin_unlock(v)
|
|
|
|
/* LOCK() takes a (pthread_lock_t) */
|
|
#define LOCK(v) \
|
|
do { \
|
|
if (__is_threaded) { \
|
|
_DO_SPINLOCK_LOCK((pthread_lock_t *)&(v)); \
|
|
} \
|
|
} while (0)
|
|
|
|
/* UNLOCK() takes a (pthread_lock_t) */
|
|
#define UNLOCK(v) \
|
|
do { \
|
|
if (__is_threaded) { \
|
|
_DO_SPINLOCK_UNLOCK((pthread_lock_t *)&(v)); \
|
|
} \
|
|
} while (0)
|
|
|
|
/* Prototypes. */
|
|
|
|
/* Functions defined in machine-dependent files. */
|
|
extern void _spin_lock(pthread_lock_t *lockp);
|
|
extern int _spin_lock_try(pthread_lock_t *lockp);
|
|
extern void _spin_unlock(pthread_lock_t *lockp);
|
|
|
|
#endif /* _POSIX_PTHREAD_SPINLOCK_H */
|