1 /* 2 * Copyright (c) 2010 Kip Macy All rights reserved. 3 * Copyright (c) 2013 Patrick Kelsey. All rights reserved. 4 * Copyright (C) 2017-2021 THL A29 Limited, a Tencent company. 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 are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright notice, this 11 * list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 #ifndef _SYS__MUTEX_H_ 30 #define _SYS__MUTEX_H_ 31 32 /* 33 * Sleep/spin mutex 34 */ 35 struct mtx { 36 struct lock_object lock_object; 37 void* mtx_lock; 38 }; 39 40 /* 41 * Members of struct mtx_padalign must mirror members of struct mtx. 42 * mtx_padalign mutexes can use the mtx(9) API transparently without 43 * modification. 44 */ 45 struct mtx_padalign { 46 struct lock_object lock_object; 47 void* mtx_lock; 48 } __attribute__((__aligned__(64))); 49 50 #endif 51