1 /* 2 * Copyright (c) 2022-2022 Huawei Device Co., Ltd. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without modification, 5 * are permitted provided that the following conditions are met: 6 * 7 * 1. Redistributions of source code must retain the above copyright notice, this list of 8 * conditions and the following disclaimer. 9 * 10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list 11 * of conditions and the following disclaimer in the documentation and/or other materials 12 * provided with the distribution. 13 * 14 * 3. Neither the name of the copyright holder nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific prior written 16 * permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef _POLL_IMPL_H 32 #define _POLL_IMPL_H 33 34 #include "los_config.h" 35 #include "los_list.h" 36 #include "los_sem.h" 37 38 #ifdef __cplusplus 39 #if __cplusplus 40 extern "C" { 41 #endif /* __cplusplus */ 42 #endif /* __cplusplus */ 43 44 typedef UINT32 PollEvent; 45 46 struct PollWaitQueue { 47 LOS_DL_LIST queue; 48 }; 49 50 struct PollTable; 51 struct PollWaitNode { 52 LOS_DL_LIST node; 53 struct PollTable *table; 54 }; 55 56 struct PollTable { 57 struct PollWaitNode *node; 58 PollEvent event; 59 UINT32 sem; 60 BOOL addQueueFlag; 61 }; 62 63 VOID PollWaitQueueInit(struct PollWaitQueue *waitQueue); 64 VOID PollNotify(struct PollWaitQueue *waitQueue, PollEvent event); 65 VOID PollWait(struct PollWaitQueue *waitQueue, struct PollTable *table); 66 INT32 PollQueryFd(INT32 fd, struct PollTable *table); 67 68 #ifdef __cplusplus 69 #if __cplusplus 70 } 71 #endif /* __cplusplus */ 72 #endif /* __cplusplus */ 73 74 #endif /* _POLL_IMPL_H */ 75