1 /* 2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved. 3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without modification, 6 * are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, this list of 9 * conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list 12 * of conditions and the following disclaimer in the documentation and/or other materials 13 * provided with the distribution. 14 * 15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used 16 * to endorse or promote products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _LOS_FUTEX_PRI_H 33 #define _LOS_FUTEX_PRI_H 34 #include "los_list.h" 35 36 #define FUTEX_WAIT 0 37 #define FUTEX_WAKE 1 38 #define FUTEX_REQUEUE 3 39 #define FUTEX_WAKE_OP 5 40 #define FUTEX_LOCK_PI 6 41 #define FUTEX_UNLOCK_PI 7 42 #define FUTEX_TRYLOCK_PI 8 43 #define FUTEX_WAIT_BITSET 9 44 45 #define FUTEX_PRIVATE 128 46 #define FUTEX_MASK 0x3U 47 48 typedef struct { 49 UINTPTR key; /* private:uvaddr shared:paddr */ 50 UINT32 index; /* hash bucket index */ 51 UINT32 pid; /* private:process id shared:OS_INVALID(-1) */ 52 LOS_DL_LIST pendList; /* point to pendList in TCB struct */ 53 LOS_DL_LIST queueList; /* thread list blocked by this lock */ 54 LOS_DL_LIST futexList; /* point to the next FutexNode */ 55 } FutexNode; 56 57 extern UINT32 OsFutexInit(VOID); 58 extern VOID OsFutexNodeDeleteFromFutexHash(FutexNode *node, BOOL isDeleteHead, FutexNode **headNode, BOOL *queueFlags); 59 extern INT32 OsFutexWake(const UINT32 *userVaddr, UINT32 flags, INT32 wakeNumber); 60 extern INT32 OsFutexWait(const UINT32 *userVaddr, UINT32 flags, UINT32 val, UINT32 absTime); 61 extern INT32 OsFutexRequeue(const UINT32 *userVaddr, UINT32 flags, INT32 wakeNumber, 62 INT32 count, const UINT32 *newUserVaddr); 63 #endif 64