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Annotation of sys/arch/alpha/include/mutex.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: mutex.h,v 1.2 2007/05/10 18:08:13 art 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:
        !            28: #ifndef _ALPHA_MUTEX_H_
        !            29: #define _ALPHA_MUTEX_H_
        !            30:
        !            31: /*
        !            32:  * Simple non-mp implementation.
        !            33:  */
        !            34: struct mutex {
        !            35:        int mtx_lock;
        !            36:        int mtx_wantipl;
        !            37:        int mtx_oldipl;
        !            38: };
        !            39:
        !            40: void mtx_init(struct mutex *, int);
        !            41:
        !            42: #define MUTEX_INITIALIZER(ipl) { 0, (ipl), 0 }
        !            43:
        !            44: #ifdef DIAGNOSTIC
        !            45: #define MUTEX_ASSERT_LOCKED(mtx) do {                                  \
        !            46:        if ((mtx)->mtx_lock == 0)                                       \
        !            47:                panic("mutex %p not held in %s", (mtx), __func__);      \
        !            48: } while (0)
        !            49:
        !            50: #define MUTEX_ASSERT_UNLOCKED(mtx) do {                                        \
        !            51:        if ((mtx)->mtx_lock != 0)                                       \
        !            52:                panic("mutex %p held in %s", (mtx), __func__);          \
        !            53: } while (0)
        !            54: #else
        !            55: #define MUTEX_ASSERT_LOCKED(mtx) do { } while (0)
        !            56: #define MUTEX_ASSERT_UNLOCKED(mtx) do { } while (0)
        !            57: #endif
        !            58:
        !            59: #define MUTEX_OLDIPL(mtx)      (mtx)->mtx_oldipl
        !            60:
        !            61: #endif /* _ALPHA_MUTEX_H_ */