projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| 9385eb3d A |
1 | /* |
| 2 | * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 9385eb3d A |
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 | |
| 68 | extern int _spin_tries; | |
| 69 | extern 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. */ | |
| 99 | extern void _spin_lock(pthread_lock_t *lockp); | |
| 100 | extern int _spin_lock_try(pthread_lock_t *lockp); | |
| 101 | extern void _spin_unlock(pthread_lock_t *lockp); | |
| 102 | ||
| 103 | #endif /* _POSIX_PTHREAD_SPINLOCK_H */ |