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 <errno.h> 20 #include <securec.h> 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <unistd.h> 24 #include <stdint.h> 25 #include <stdarg.h> 26 #include <pthread.h> 27 #include <sys/time.h> 28 #include <sys/shm.h> 29 30 #define MAX_DATA_LENGTH 1024 31 #define MAX_WAIT_TIMEOUT 10 32 #define SHM_SEND_KEY 123456 33 #define SHM_RECV_KEY 123466 34 35 struct shared_use_st 36 { 37 int written;//作为一个标志，非0：表示可读，0表示可写 38 char data[MAX_DATA_LENGTH];//记录写入和读取的文本 39 }; 40 41 #define LOG(format, ...) \ 42 do \ 43 { \ 44 time_t timeSec; \ 45 time(&timeSec); \ 46 struct tm tmRst; \ 47 localtime_r(&timeSec, &tmRst); \ 48 char strTime[10]; \ 49 strftime(strTime, sizeof(strTime), "%H:%M:%S", &tmRst); \ 50 fprintf(stdout, "[shm-utils] %s " format "\n",strTime, ##__VA_ARGS__); \ 51 } while(0) 52 53 int createShm(int key); 54 int disconnectShm(void); 55 int writeCodeDataToShm(int code, char* buf); 56 int waitDataWithCode(char* code, char* data); 57 int writeDataToShm(char* buf); 58 int deleteShm(void); 59 char* Int2String(int num,char *str); 60 void initShm(void); 61 int readDataFromShm(char* buf); 62 63 64 #endif 65 66