一个主动调用让 C++ `std::thread` 退出执行的方法

#include <chrono>
#include <future>
#include <thread>
#include <cstdio>

struct Looper {
    void loop() {
        printf("\tloop....\n");
        std::this_thread::sleep_for(std::chrono::seconds(1));
    }
};


struct LooperThread {
    explicit LooperThread(Looper *looper) : mLooper(looper) {
        mThreadId = std::this_thread::get_id();
    }

    void run() {
        mThread = std::thread([this]() { this->threadLoop(this->mExitSignal.get_future()); });
        mThread.detach();
    }

    void stop() { mExitSignal.set_value(); }


    virtual ~LooperThread() {}

private:
    Looper *mLooper;
    std::thread::id mThreadId;
    std::thread mThread;
    std::promise<void> mExitSignal;

    void threadLoop(std::future<void> exitListner) {
        printf("start %s\n", __func__);
        do {
            mLooper->loop();
        } while (exitListner.wait_for(std::chrono::milliseconds(1)) == std::future_status::timeout);
        printf("exit %s\n", __func__);
    }
};

int main() {
    Looper looper;
    LooperThread t{&looper};
    t.run();
    std::this_thread::sleep_for(std::chrono::seconds(5));
    t.stop();
    std::this_thread::sleep_for(std::chrono::seconds(5));
}

输出

???@???:/local/mnt/workspace/practice/cpp$ ./out/main
start threadLoop
        loop....
        loop....
        loop....
        loop....
        loop....
exit threadLoop
???@???:/local/mnt/workspace/practice/cpp$

Reference: https://thispointer.com/c11-how-to-stop-or-terminate-a-thread/