1 /* $OpenBSD: mutex.h,v 1.9 2024/05/16 09:30:03 kettenis Exp $ */ 2 3 /* 4 * Copyright (c) 2005, Miodrag Vallat. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef _M88K_MUTEX_H_ 29 #define _M88K_MUTEX_H_ 30 31 #include <sys/_lock.h> 32 33 struct mutex { 34 volatile int mtx_lock; 35 int mtx_wantipl; 36 int mtx_oldipl; 37 volatile void *mtx_owner; 38 #ifdef WITNESS 39 struct lock_object mtx_lock_obj; 40 #endif 41 }; 42 43 #ifdef WITNESS 44 #define MUTEX_INITIALIZER_FLAGS(ipl, name, flags) \ 45 { 0, __MUTEX_IPL((ipl)), IPL_NONE, NULL, \ 46 MTX_LO_INITIALIZER(name, flags) } 47 #else 48 #define MUTEX_INITIALIZER_FLAGS(ipl, name, flags) \ 49 { 0, __MUTEX_IPL((ipl)), IPL_NONE, NULL } 50 #endif 51 52 void __mtx_init(struct mutex *, int); 53 #define _mtx_init(mtx, ipl) __mtx_init((mtx), __MUTEX_IPL((ipl))) 54 55 #ifdef DIAGNOSTIC 56 57 #define MUTEX_ASSERT_LOCKED(mtx) do { \ 58 if (((mtx)->mtx_owner != curcpu()) && !(panicstr || db_active)) \ 59 panic("mutex %p not held in %s", (mtx), __func__); \ 60 } while (0) 61 62 #define MUTEX_ASSERT_UNLOCKED(mtx) do { \ 63 if (((mtx)->mtx_owner == curcpu()) && !(panicstr || db_active)) \ 64 panic("mutex %p held in %s", (mtx), __func__); \ 65 } while (0) 66 67 #else 68 69 #define MUTEX_ASSERT_LOCKED(mtx) do { /* nothing */ } while (0) 70 #define MUTEX_ASSERT_UNLOCKED(mtx) do { /* nothing */ } while (0) 71 72 #endif 73 74 #define MUTEX_LOCK_OBJECT(mtx) (&(mtx)->mtx_lock_obj) 75 #define MUTEX_OLDIPL(mtx) (mtx)->mtx_oldipl 76 77 #endif /* _M88K_MUTEX_H_ */ 78