lock.h revision 1.5.2.2
1 1.5.2.2 bouyer /* $NetBSD: lock.h,v 1.5.2.2 2000/11/20 20:32:56 bouyer Exp $ */ 2 1.5.2.2 bouyer 3 1.5.2.2 bouyer /* 4 1.5.2.2 bouyer * Copyright (c) 2000 Ludd, University of Lule}, Sweden. 5 1.5.2.2 bouyer * All rights reserved. 6 1.5.2.2 bouyer * 7 1.5.2.2 bouyer * Redistribution and use in source and binary forms, with or without 8 1.5.2.2 bouyer * modification, are permitted provided that the following conditions 9 1.5.2.2 bouyer * are met: 10 1.5.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 11 1.5.2.2 bouyer * notice, this list of conditions and the following disclaimer. 12 1.5.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 13 1.5.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 14 1.5.2.2 bouyer * documentation and/or other materials provided with the distribution. 15 1.5.2.2 bouyer * 3. All advertising materials mentioning features or use of this software 16 1.5.2.2 bouyer * must display the following acknowledgement: 17 1.5.2.2 bouyer * This product includes software developed at Ludd, University of Lule}. 18 1.5.2.2 bouyer * 4. The name of the author may not be used to endorse or promote products 19 1.5.2.2 bouyer * derived from this software without specific prior written permission 20 1.5.2.2 bouyer * 21 1.5.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 1.5.2.2 bouyer * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 1.5.2.2 bouyer * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 1.5.2.2 bouyer * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 1.5.2.2 bouyer * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 1.5.2.2 bouyer * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 1.5.2.2 bouyer * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 1.5.2.2 bouyer * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 1.5.2.2 bouyer * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 1.5.2.2 bouyer * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 1.5.2.2 bouyer */ 32 1.5.2.2 bouyer 33 1.5.2.2 bouyer #ifndef _VAX_LOCK_H_ 34 1.5.2.2 bouyer #define _VAX_LOCK_H_ 35 1.5.2.2 bouyer 36 1.5.2.2 bouyer typedef __volatile int __cpu_simple_lock_t; 37 1.5.2.2 bouyer 38 1.5.2.2 bouyer #define __SIMPLELOCK_LOCKED 1 39 1.5.2.2 bouyer #define __SIMPLELOCK_UNLOCKED 0 40 1.5.2.2 bouyer 41 1.5.2.2 bouyer static __inline void 42 1.5.2.2 bouyer __cpu_simple_lock_init(__cpu_simple_lock_t *alp) 43 1.5.2.2 bouyer { 44 1.5.2.2 bouyer *alp = __SIMPLELOCK_UNLOCKED; 45 1.5.2.2 bouyer } 46 1.5.2.2 bouyer 47 1.5.2.2 bouyer static __inline void 48 1.5.2.2 bouyer __cpu_simple_lock(__cpu_simple_lock_t *alp) 49 1.5.2.2 bouyer { 50 1.5.2.2 bouyer __asm__ __volatile ("1:;bbssi $0, %0, 1b" 51 1.5.2.2 bouyer : /* No output */ 52 1.5.2.2 bouyer : "m"(*alp)); 53 1.5.2.2 bouyer } 54 1.5.2.2 bouyer 55 1.5.2.2 bouyer static __inline void 56 1.5.2.2 bouyer __cpu_simple_unlock(__cpu_simple_lock_t *alp) 57 1.5.2.2 bouyer { 58 1.5.2.2 bouyer *alp = __SIMPLELOCK_UNLOCKED; 59 1.5.2.2 bouyer } 60 1.5.2.2 bouyer 61 1.5.2.2 bouyer static __inline int 62 1.5.2.2 bouyer __cpu_simple_lock_try(__cpu_simple_lock_t *alp) 63 1.5.2.2 bouyer { 64 1.5.2.2 bouyer int ret; 65 1.5.2.2 bouyer 66 1.5.2.2 bouyer __asm__ __volatile ("movl $0,%0;bbssi $0,%1,1f;incl %0;1:" 67 1.5.2.2 bouyer : "=&r"(ret) 68 1.5.2.2 bouyer : "m"(*alp)); 69 1.5.2.2 bouyer 70 1.5.2.2 bouyer return ret; 71 1.5.2.2 bouyer } 72 1.5.2.2 bouyer 73 1.5.2.2 bouyer #endif /* _VAX_LOCK_H_ */ 74
Indexes created Tue Oct 14 00:09:49 GMT 2025