/*- * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Berkeley Software Design Inc's name may not be used to endorse or * promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from BSDI $Id: mutex.h,v 2.7.2.35 2000/04/27 03:10:26 cp Exp $ * $FreeBSD$ */ #ifndef _MACHINE_MUTEX_H_ #define _MACHINE_MUTEX_H_ #ifndef LOCORE #ifdef _KERNEL /* Global locks */ extern struct mtx clock_lock; #endif /* _KERNEL */ #else /* !LOCORE */ /* * Simple assembly macros to get and release mutexes. * * Note: All of these macros accept a "flags" argument and are analoguous * to the mtx_lock_flags and mtx_unlock_flags general macros. If one * desires to not pass a flag, the value 0 may be passed as second * argument. * * XXX: We only have MTX_LOCK_SPIN and MTX_UNLOCK_SPIN for now, since that's * all we use right now. We should add MTX_LOCK and MTX_UNLOCK (for sleep * locks) in the near future, however. */ #define MTX_LOCK_SPIN(lck, flags) \ pushq $0 ; \ pushq $0 ; \ pushq $flags ; \ pushq $lck ; \ call _mtx_lock_spin_flags ; \ addq $0x20, %rsp ; \ #define MTX_UNLOCK_SPIN(lck) \ pushq $0 ; \ pushq $0 ; \ pushq $0 ; \ pushq $lck ; \ call _mtx_unlock_spin_flags ; \ addq $0x20, %rsp ; \ #endif /* !LOCORE */ #endif /* __MACHINE_MUTEX_H */