1 /* 2 * Copyright (C) 2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef SHM_UTILS_H 17 #define SHM_UTILS_H 18 19 #include <cerrno> 20 #include <cstdarg> 21 #include <cstdint> 22 #include <cstdio> 23 #include <cstdlib> 24 #include <pthread.h> 25 #include <securec.h> 26 #include <sys/shm.h> 27 #include <sys/time.h> 28 #include <unistd.h> 29 30 #define MAX_WAIT_TIMEOUT 10 31 #define SHM_SEND_KEY 123456 32 #define SHM_RECV_KEY 123466 33 34 struct shared_use_st { 35 int written; // 作为一个标志，非0：表示可读，0表示可写 36 char data[1024]; // 记录写入和读取的文本 37 }; 38 39 #define LOG(format, ...) \ 40 do { \ 41 time_t timeSec; \ 42 time(&timeSec); \ 43 struct tm tmRst; \ 44 localtime_r(&timeSec, &tmRst); \ 45 char strTime[10]; \ 46 strftime(strTime, sizeof(strTime), "%H:%M:%S", &tmRst); \ 47 fprintf(stdout, "[shm-utils] %s " format "\n", strTime, ##__VA_ARGS__); \ 48 } while (0) 49 50 int createShm(int key); 51 int disconnectShm(void); 52 int writeCodeDataToShm(int code, char* buf); 53 int waitDataWithCode(char* code, char* data); 54 int writeDataToShm(char* buf); 55 int deleteShm(void); 56 char* Int2String(int num, char* str); 57 void initShm(void); 58 int readDataFromShm(char* buf); 59 int readDataFromShmNoClear(char* buf); 60 #endif