c++怎么实现一个简单的线程池_c++ 简单线程池实现方法

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

class ThreadPool {
public:
    explicit ThreadPool(int numThreads) : stop(false) {
        for (int i = 0; i < numThreads; ++i) {
            workers.emplace_back([this] {
                while (true) {
                    std::function task;
                    {
                        std::unique_lock lock(queue_mutex);
                        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(queue_mutex);
            stop = true;
        }
        condition.notify_all();
        for (std::thread& worker : workers) {
            worker.join();
        }
    }

    // 添加任务，支持任意可调用对象
    template
    void enqueue(F&& f) {
        {
            std::unique_lock lock(queue_mutex);
            tasks.emplace(std::forward(f));
        }
        condition.notify_one();
    }

private:
    std::vector workers;           // 工作线程
    std::queue> tasks;   // 任务队列
    std::mutex queue_mutex;                     // 保护任务队列
    std::condition_variable condition;          // 唤醒线程
    std::atomic stop;                     // 是否停止
};

int main() {
    ThreadPool pool(4); // 创建4个线程的线程池

    // 提交10个任务
    for (int i = 0; i < 10; ++i) {
        pool.enqueue([i] {
            std::cout << "Task " << i << " is running on thread "
                      << std::this_thread::get_id() << '\n';
            std::this_thread::sleep_for(std::chrono::milliseconds(100));
        });
    }

    // 主函数退出前，pool析构会自动等待所有线程完成
    return 0;
}