| /*- |
| * 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: bsd_mutex.h,v 1.1.1.1 2012/03/29 17:21:23 uid42307 Exp $ |
| * $FreeBSD$ |
| */ |
| |
| #ifndef _BSD_MACHINE_MUTEX_H_ |
| #define _BSD_MACHINE_MUTEX_H_ |
| |
| #ifdef 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) \ |
| pushl $0 ; \ |
| pushl $0 ; \ |
| pushl $flags ; \ |
| pushl $lck ; \ |
| call _mtx_lock_spin_flags ; \ |
| addl $0x10, %esp ; \ |
| |
| #define MTX_UNLOCK_SPIN(lck) \ |
| pushl $0 ; \ |
| pushl $0 ; \ |
| pushl $0 ; \ |
| pushl $lck ; \ |
| call _mtx_unlock_spin_flags ; \ |
| addl $0x10, %esp ; \ |
| |
| #endif /* LOCORE */ |
| #endif /* __MACHINE_MUTEX_H */ |
