coc仓库--fork子进程

fork子进程

原函数

void forktest(int *i, pid_t parentid)
{
    tesseract::TessBaseAPI *chi_api = new tesseract::TessBaseAPI();
    if (chi_api->Init("/usr/share/tesseract-ocr/4.00/tessdata/", "chi"))
    {
        fprintf(stderr, "Could not initialize tesseract.\n");
        exit(1);
    }
    deviceINFO cdc3f475;
    auto armymodel = fastdeploy::vision::detection::YOLOv5("/home/yuxian/coc/fastdepoly/army.onnx");
    auto constructmodel = fastdeploy::vision::detection::YOLOv5("/home/yuxian/coc/fastdepoly/construct.onnx");
    auto attack_homemodel = fastdeploy::vision::detection::YOLOv5("/home/yuxian/coc/fastdepoly/attack_home.onnx");
    auto naimodel = fastdeploy::vision::detection::YOLOv5("/home/yuxian/coc/fastdepoly/nai.onnx");
    auto duchengmodel = fastdeploy::vision::detection::YOLOv5("/home/yuxian/coc/fastdepoly/ducheng.onnx");
    auto homemodel = fastdeploy::vision::detection::YOLOv5("/home/yuxian/coc/fastdepoly/home.onnx");
    auto xunlianmodel = fastdeploy::vision::detection::YOLOv5("/home/yuxian/coc/fastdepoly/xunlian.onnx");
    // fork();
    //  fork();
    cv::Mat mat(1080, 1920, CV_8UC3);

    if (getpid() - parentid == 0)
    {
        *i = 0;
        std::cout << "这是主进程。此时 i = " << *i << "  pid = " << getpid() << std::endl;
        FILE *file = popen("adb -s cdc3f475 shell /data/local/tmp/minitouch -i", "w");
        cdc3f475.touchFile = file;
        cdc3f475.ADB_IP = "cdc3f475";
        cdc3f475.mat = &mat;
        cdc3f475.armyModelPoint = &armymodel;
        cdc3f475.constructModelPoint = &constructmodel;
        cdc3f475.attack_homeModelPoint = &attack_homemodel;
        cdc3f475.naiModelPoint = &naimodel;
        cdc3f475.duchengModelPoint = &duchengmodel;
        cdc3f475.homeModelPoint = &homemodel;
        cdc3f475.xunlianModelPoint = &xunlianmodel;
        cdc3f475.chi_api = chi_api;
        control(&cdc3f475);
        pclose(file);
    }
    else if ((int)(getpid() - parentid) == 1)
    {

    }
    std::cout << getpid() << " parent id = " << getppid() << std::endl;
    sleepMills(1000);
}

2.函数解析

*在fork过后，子进程就会被创建，可以根据getpid来分辨所在进程，由于子进程接下来同样会运行父进程的相同代码。
*所以子if结构内进行独立资源的定义，而在if外进行共用资源的定义。
*主要共用资源有 fastdeploy所有的onnx模型，以及tesseract所需要的api指针。