fbsdcompat/spinlock.h

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
  27  * All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by John Birrell.
  40  * 4. Neither the name of the author nor the names of any co-contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  * $FreeBSD: src/lib/libc/include/spinlock.h,v 1.5 2002/03/21 22:47:52 obrien Exp $
  57  *
  58  * Lock definitions used in both libc and libpthread.
  59  *
  60  */
  61
  62 #ifndef _SPINLOCK_H_
  63 #define _SPINLOCK_H_
  64 #ifdef __APPLE__
  65 #include <pthread_spinlock.h>
  66
  67 typedef pthread_lock_t spinlock_t;
  68
  69 #define _SPINLOCK_INITIALIZER   LOCK_INITIALIZER
  70
  71 #define _SPINLOCK(_lck)                                                 \
  72     do {                                                                \
  73         _DO_SPINLOCK_LOCK(_lck);                                        \
  74     } while (0)
  75
  76 #define _SPINUNLOCK(_lck)                                               \
  77     do {                                                                \
  78         _DO_SPINLOCK_UNLOCK(_lck);                                      \
  79     } while (0)
  80
  81 #else /* ! __APPLE__ */
  82 #include <sys/cdefs.h>
  83 #include <sys/types.h>
  84
  85 /*
  86  * Lock structure with room for debugging information.
  87  */
  88 typedef struct {
  89         volatile long   access_lock;
  90         volatile long   lock_owner;
  91         volatile char   *fname;
  92         volatile int    lineno;
  93 } spinlock_t;
  94
  95 #define _SPINLOCK_INITIALIZER   { 0, 0, 0, 0 }
  96
  97 #define _SPINUNLOCK(_lck)       (_lck)->access_lock = 0
  98 #ifdef  _LOCK_DEBUG
  99 #define _SPINLOCK(_lck)         _spinlock_debug(_lck, __FILE__, __LINE__)
 100 #else
 101 #define _SPINLOCK(_lck)         _spinlock(_lck)
 102 #endif
 103
 104 /*
 105  * Thread function prototype definitions:
 106  */
 107 __BEGIN_DECLS
 108 long    _atomic_lock(volatile long *);
 109 void    _spinlock(spinlock_t *);
 110 void    _spinlock_debug(spinlock_t *, char *, int);
 111 __END_DECLS
 112
 113 #endif /* __APPLE__ */
 114
 115 #endif /* _SPINLOCK_H_ */