1*86d7f5d3SJohn Marino /* 2*86d7f5d3SJohn Marino * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>. 3*86d7f5d3SJohn Marino * All rights reserved. 4*86d7f5d3SJohn Marino * 5*86d7f5d3SJohn Marino * Redistribution and use in source and binary forms, with or without 6*86d7f5d3SJohn Marino * modification, are permitted provided that the following conditions 7*86d7f5d3SJohn Marino * are met: 8*86d7f5d3SJohn Marino * 1. Redistributions of source code must retain the above copyright 9*86d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer. 10*86d7f5d3SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright 11*86d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer in the 12*86d7f5d3SJohn Marino * documentation and/or other materials provided with the distribution. 13*86d7f5d3SJohn Marino * 3. All advertising materials mentioning features or use of this software 14*86d7f5d3SJohn Marino * must display the following acknowledgement: 15*86d7f5d3SJohn Marino * This product includes software developed by John Birrell. 16*86d7f5d3SJohn Marino * 4. Neither the name of the author nor the names of any co-contributors 17*86d7f5d3SJohn Marino * may be used to endorse or promote products derived from this software 18*86d7f5d3SJohn Marino * without specific prior written permission. 19*86d7f5d3SJohn Marino * 20*86d7f5d3SJohn Marino * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 21*86d7f5d3SJohn Marino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22*86d7f5d3SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23*86d7f5d3SJohn Marino * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24*86d7f5d3SJohn Marino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25*86d7f5d3SJohn Marino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26*86d7f5d3SJohn Marino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27*86d7f5d3SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28*86d7f5d3SJohn Marino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29*86d7f5d3SJohn Marino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30*86d7f5d3SJohn Marino * SUCH DAMAGE. 31*86d7f5d3SJohn Marino * 32*86d7f5d3SJohn Marino * $FreeBSD: src/lib/libc/include/spinlock.h,v 1.4 1999/08/27 23:59:48 peter Exp $ 33*86d7f5d3SJohn Marino * $DragonFly: src/lib/libc/include/spinlock.h,v 1.4 2005/01/31 22:29:29 dillon Exp $ 34*86d7f5d3SJohn Marino * 35*86d7f5d3SJohn Marino * Lock definitions used in both libc and libpthread. 36*86d7f5d3SJohn Marino * 37*86d7f5d3SJohn Marino */ 38*86d7f5d3SJohn Marino 39*86d7f5d3SJohn Marino #ifndef _SPINLOCK_H_ 40*86d7f5d3SJohn Marino #define _SPINLOCK_H_ 41*86d7f5d3SJohn Marino #include <sys/cdefs.h> 42*86d7f5d3SJohn Marino #include <sys/types.h> 43*86d7f5d3SJohn Marino 44*86d7f5d3SJohn Marino /* 45*86d7f5d3SJohn Marino * Lock structure with room for debugging information. 46*86d7f5d3SJohn Marino */ 47*86d7f5d3SJohn Marino typedef struct { 48*86d7f5d3SJohn Marino volatile long access_lock; 49*86d7f5d3SJohn Marino volatile long lock_owner; 50*86d7f5d3SJohn Marino volatile char *fname; 51*86d7f5d3SJohn Marino volatile int lineno; 52*86d7f5d3SJohn Marino } spinlock_t; 53*86d7f5d3SJohn Marino 54*86d7f5d3SJohn Marino #define _SPINLOCK_INITIALIZER { 0, 0, 0, 0 } 55*86d7f5d3SJohn Marino 56*86d7f5d3SJohn Marino #define _SPINUNLOCK(_lck) _spinunlock(_lck) 57*86d7f5d3SJohn Marino #ifdef _LOCK_DEBUG 58*86d7f5d3SJohn Marino #define _SPINLOCK(_lck) _spinlock_debug(_lck, __FILE__, __LINE__) 59*86d7f5d3SJohn Marino #else 60*86d7f5d3SJohn Marino #define _SPINLOCK(_lck) _spinlock(_lck) 61*86d7f5d3SJohn Marino #endif 62*86d7f5d3SJohn Marino #define _SPINTRYLOCK(_lck) _spintrylock(_lck) 63*86d7f5d3SJohn Marino 64*86d7f5d3SJohn Marino /* 65*86d7f5d3SJohn Marino * Thread function prototype definitions: 66*86d7f5d3SJohn Marino */ 67*86d7f5d3SJohn Marino __BEGIN_DECLS 68*86d7f5d3SJohn Marino long _atomic_lock (volatile long *); 69*86d7f5d3SJohn Marino void _spinlock (spinlock_t *); 70*86d7f5d3SJohn Marino int _spintrylock (spinlock_t *); 71*86d7f5d3SJohn Marino void _spinlock_debug (spinlock_t *, char *, int); 72*86d7f5d3SJohn Marino void _spinunlock (spinlock_t *); 73*86d7f5d3SJohn Marino __END_DECLS 74*86d7f5d3SJohn Marino 75*86d7f5d3SJohn Marino #endif /* _SPINLOCK_H_ */ 76