1/* 2 * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23/* 24 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>. 25 * All rights reserved. 26 * 27 * Redistribution and use in source and binary forms, with or without 28 * modification, are permitted provided that the following conditions 29 * are met: 30 * 1. Redistributions of source code must retain the above copyright 31 * notice, this list of conditions and the following disclaimer. 32 * 2. Redistributions in binary form must reproduce the above copyright 33 * notice, this list of conditions and the following disclaimer in the 34 * documentation and/or other materials provided with the distribution. 35 * 3. All advertising materials mentioning features or use of this software 36 * must display the following acknowledgement: 37 * This product includes software developed by John Birrell. 38 * 4. Neither the name of the author nor the names of any co-contributors 39 * may be used to endorse or promote products derived from this software 40 * without specific prior written permission. 41 * 42 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 43 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 44 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 45 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 46 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 47 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 48 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 * 54 * $FreeBSD: src/lib/libc/include/spinlock.h,v 1.5 2002/03/21 22:47:52 obrien Exp $ 55 * 56 * Lock definitions used in both libc and libpthread. 57 * 58 */ 59 60#ifndef _SPINLOCK_H_ 61#define _SPINLOCK_H_ 62#ifdef __APPLE__ 63#include <pthread_spinlock.h> 64 65typedef pthread_lock_t spinlock_t; 66 67#define _SPINLOCK_INITIALIZER LOCK_INITIALIZER 68 69#define _SPINLOCK(_lck) \ 70 do { \ 71 _DO_SPINLOCK_LOCK(_lck); \ 72 } while (0) 73 74#define _SPINUNLOCK(_lck) \ 75 do { \ 76 _DO_SPINLOCK_UNLOCK(_lck); \ 77 } while (0) 78 79#else /* ! __APPLE__ */ 80#include <sys/cdefs.h> 81#include <sys/types.h> 82 83/* 84 * Lock structure with room for debugging information. 85 */ 86typedef struct { 87 volatile long access_lock; 88 volatile long lock_owner; 89 volatile char *fname; 90 volatile int lineno; 91} spinlock_t; 92 93#define _SPINLOCK_INITIALIZER { 0, 0, 0, 0 } 94 95#define _SPINUNLOCK(_lck) (_lck)->access_lock = 0 96#ifdef _LOCK_DEBUG 97#define _SPINLOCK(_lck) _spinlock_debug(_lck, __FILE__, __LINE__) 98#else 99#define _SPINLOCK(_lck) _spinlock(_lck) 100#endif 101 102/* 103 * Thread function prototype definitions: 104 */ 105__BEGIN_DECLS 106long _atomic_lock(volatile long *); 107void _spinlock(spinlock_t *); 108void _spinlock_debug(spinlock_t *, char *, int); 109__END_DECLS 110 111#endif /* __APPLE__ */ 112 113#endif /* _SPINLOCK_H_ */ 114