如何设计一个线程池

设计一个线程池涉及到多个方面，包括线程的创建与销毁、任务的提交与执行、线程间的通信等。

以下不念给出的是一个简单的线程池设计思路：

给个例子：

#include

#include

#include

#include

#include

#include

#include 

class ThreadPool {

public:

    ThreadPool(size_t numThreads) : stop(false) {

        for (size_t i = 0; i < numThreads; ++i) {

            workers.emplace_back([this] {

                while (true) {

                    std::function task;
                    {

                        std::unique_lock lock(queueMutex);

                        condition.wait(lock, [this] { return stop || !tasks.empty(); });
                        if (stop && tasks.empty()) {

                            return;

                        }
                        task = std::move(tasks.front());

                        tasks.pop();

                    }
                    task();

                }

            });

        }

    }
    ~ThreadPool() {

        {

            std::unique_lock lock(queueMutex);

            stop = true;

        }
        condition.notify_all();
        for (std::thread &worker : workers) {

            worker.join();

        }

    }
    template

    void enqueue(F&& f) {

        {

            std::unique_lock lock(queueMutex);

            tasks.emplace(std::forward(f));

        }
        condition.notify_one();

    }
private:

    std::vector workers;

    std::queue tasks;

    std::mutex queueMutex;

    std::condition_variable condition;

    bool stop;

};
int main() {

    ThreadPool pool(4);
    for (int i = 0; i < 8; ++i) {

        pool.enqueue([i] {

            std::cout