简单的C ++跨平台方式来执行外部程序 [英] Simple C++ cross-platform way to execute an external program

问题描述

在C ++中执行外部程序并从中获取返回代码的简单，优雅，有效的跨平台方法是什么？

What is a simple, elegant, and effective cross-platform way to execute an external program in C++ and get the return code from it?

int execute(std::string const &path, std::vector<std::string> const &arguments = {})
{
    //...
}

因为我们正在等待被调用程序在继续执行之前，被调用程序应使用我们程序的输入/输出/错误流。如果出于各种原因， path 无法执行，则抛出异常（例如， std :: invalid_argument ）。

Since we're waiting for the called program to finish before continuing execution, the called program should use our program's input/output/error streams. If, for any number of reasons, path isn't executable, just throw an exception (e.g. std::invalid_argument).

很显然，不要使用 system（）。

推荐答案

如果您只需要执行一个程序，则生成一个工作线程并让该线程调用 system ：

If it is just one single program you need to execute, spawn a worker thread and have that thread call system:

void executeProgram(std::string programName) {
    system(programName.c_str());
}

void execute() {
    string programName = "test.cpp";
    std::thread worker (executeProgram, programName);
    worker.join(); //wait for the worker to complete
}

如果需要生成在许多程序中，使用线程池类委派工作线程并在完成后将其加入可能更有意义。

If you need to be able to spawn many programs, a thread pool class to delegate worker threads and join them upon completion might make more sense.

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