MacPorts installs libtoolize as glibtoolize :(.
[cycript.git] / include / pthread_spinlock.h
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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 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
25 * All Rights Reserved
26 *
27 * Permission to use, copy, modify, and distribute this software and
28 * its documentation for any purpose and without fee is hereby granted,
29 * provided that the above copyright notice appears in all copies and
30 * that both the copyright notice and this permission notice appear in
31 * supporting documentation.
32 *
33 * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
34 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
35 * FOR A PARTICULAR PURPOSE.
36 *
37 * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
38 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
39 * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
40 * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
41 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
42 *
43 */
44/*
45 * MkLinux
46 */
47
48/*
49 * POSIX Threads - IEEE 1003.1c
50 */
51
52#ifndef _POSIX_PTHREAD_SPINLOCK_H
53#define _POSIX_PTHREAD_SPINLOCK_H
54
55#include <mach/mach.h>
56#define __APPLE_API_PRIVATE
57#include <machine/cpu_capabilities.h>
58
59#ifndef __POSIX_LIB__
60#define __POSIX_LIB__
61#endif
62
63#include "pthread_machdep.h" /* Machine-dependent definitions. */
64
65/* Number of times to spin when the lock is unavailable and we are on a
66 multiprocessor. On a uniprocessor we yield the processor immediately. */
67#define MP_SPIN_TRIES 1000
68extern int _spin_tries;
69extern int __is_threaded;
70
71/* Internal mutex locks for data structures */
72#define TRY_LOCK(v) (!__is_threaded || _spin_lock_try((pthread_lock_t *)&(v)))
73
74/* _DO_SPINLOCK_LOCK() takes a (pthread_lock_t *) */
75#define _DO_SPINLOCK_LOCK(v) _spin_lock(v)
76
77/* _DO_SPINLOCK_UNLOCK() takes a (pthread_lock_t *) */
78#define _DO_SPINLOCK_UNLOCK(v) _spin_unlock(v)
79
80/* LOCK() takes a (pthread_lock_t) */
81#define LOCK(v) \
82 do { \
83 if (__is_threaded) { \
84 _DO_SPINLOCK_LOCK((pthread_lock_t *)&(v)); \
85 } \
86 } while (0)
87
88/* UNLOCK() takes a (pthread_lock_t) */
89#define UNLOCK(v) \
90 do { \
91 if (__is_threaded) { \
92 _DO_SPINLOCK_UNLOCK((pthread_lock_t *)&(v)); \
93 } \
94 } while (0)
95
96/* Prototypes. */
97
98/* Functions defined in machine-dependent files. */
99extern void _spin_lock(pthread_lock_t *lockp);
100extern int _spin_lock_try(pthread_lock_t *lockp);
101extern void _spin_unlock(pthread_lock_t *lockp);
102
103#endif /* _POSIX_PTHREAD_SPINLOCK_H */