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Annotation of sys/arch/alpha/include/mutex.h, Revision 1.1.1.1

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_ */