Annotation of sys/arch/i386/include/mutex.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: mutex.h,v 1.3 2005/07/18 02:43:25 fgsch Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
! 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: *
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. The name of the author may not be used to endorse or promote products
! 14: * derived from this software without specific prior written permission.
! 15: *
! 16: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
! 17: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
! 18: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
! 19: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
! 20: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! 21: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
! 22: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
! 23: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! 24: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
! 25: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 26: */
! 27: #ifndef _I386_MUTEX_H_
! 28: #define _I386_MUTEX_H_
! 29:
! 30: /*
! 31: * XXX - we don't really need the mtx_lock field, we can use mtx_oldipl
! 32: * as the lock to save some space.
! 33: */
! 34: struct mutex {
! 35: __volatile int mtx_lock;
! 36: int mtx_wantipl;
! 37: int mtx_oldipl;
! 38: void *mtx_owner;
! 39: };
! 40:
! 41: #define MUTEX_INITIALIZER(IPL) { 0, (IPL), 0, NULL }
! 42:
! 43: #define MUTEX_ASSERT_LOCKED(mtx) do { \
! 44: if ((mtx)->mtx_lock != 1 || \
! 45: (mtx)->mtx_owner != curcpu()) \
! 46: panic("mutex %p not held in %s", (mtx), __func__); \
! 47: } while (0)
! 48:
! 49: #define MUTEX_ASSERT_UNLOCKED(mtx) do { \
! 50: if ((mtx)->mtx_lock == 1 && \
! 51: (mtx)->mtx_owner == curcpu()) \
! 52: panic("mutex %p held in %s", (mtx), __func__); \
! 53: } while (0)
! 54:
! 55: #define MUTEX_OLDIPL(mtx) (mtx)->mtx_oldipl
! 56:
! 57: #endif
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