/* * 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 */ #ifndef _POSIX_PTHREAD_SPINLOCK_H #define _POSIX_PTHREAD_SPINLOCK_H #include <mach/mach.h> #define __APPLE_API_PRIVATE #include <machine/cpu_capabilities.h> #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 */