1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the author nor the names of any co-contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 * 33 * Lock definitions used in both libc and libpthread. 34 * 35 */ 36 37 #ifndef _SPINLOCK_H_ 38 #define _SPINLOCK_H_ 39 #include <sys/cdefs.h> 40 #include <sys/types.h> 41 42 /* 43 * Lock structure with room for debugging information. 44 */ 45 struct _spinlock { 46 long spare1; 47 long spare2; 48 void *thr_extra; 49 int spare3; 50 }; 51 typedef struct _spinlock spinlock_t; 52 53 #define _SPINLOCK_INITIALIZER { 0, 0, 0, 0 } 54 55 #define _SPINUNLOCK(_lck) _spinunlock(_lck); 56 #define _SPINLOCK(_lck) _spinlock(_lck) 57 58 /* 59 * Thread function prototype definitions: 60 */ 61 __BEGIN_DECLS 62 long _atomic_lock(volatile long *); 63 void _spinlock(spinlock_t *); 64 void _spinunlock(spinlock_t *); 65 __END_DECLS 66 67 #endif /* _SPINLOCK_H_ */ 68