/*

 * Copyright (C) 2022 Huawei Device Co., Ltd.

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



#ifndef SHM_UTILS_H

#define SHM_UTILS_H



#include <cerrno>

#include <cstdarg>

#include <cstdint>

#include <cstdio>

#include <cstdlib>

#include <pthread.h>

#include <securec.h>

#include <sys/shm.h>

#include <sys/time.h>

#include <unistd.h>



#define MAX_WAIT_TIMEOUT 10

#define SHM_SEND_KEY 123456

#define SHM_RECV_KEY 123466



struct shared_use_st {

    int written;     // 作为一个标志，非0：表示可读，0表示可写

    char data[1024]; // 记录写入和读取的文本

};



#define LOG(format, ...)                                                        \

    do {                                                                        \

        time_t timeSec;                                                         \

        time(&timeSec);                                                         \

        struct tm tmRst;                                                        \

        localtime_r(&timeSec, &tmRst);                                          \

        char strTime[10];                                                       \

        strftime(strTime, sizeof(strTime), "%H:%M:%S", &tmRst);                 \

        fprintf(stdout, "[shm-utils] %s " format "\n", strTime, ##__VA_ARGS__); \

    } while (0)



int createShm(int key);

int disconnectShm(void);

int writeCodeDataToShm(int code, char* buf);

int waitDataWithCode(char* code, char* data);

int writeDataToShm(char* buf);

int deleteShm(void);

char* Int2String(int num, char* str);

void initShm(void);

int readDataFromShm(char* buf);

int readDataFromShmNoClear(char* buf);

#endif