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在C++中可以使用多线程库来实现进程池，以下是一个简单的进程池实现示例：
#include <iostream> #include <vector> #include <thread> #include <mutex> #include <condition_variable> #include <queue> #include <functional> class ThreadPool { public: ThreadPool(int numThreads) : stop(false) { for (int i = 0; i < numThreads; ++i) { workers.emplace_back([this] { while (true) { std::function<void()> task; { std::unique_lock<std::mutex> lock(queueMutex); condition.wait(lock, [this] { return stop || !tasks.empty(); }); if (stop && tasks.empty()) { return; } task = tasks.front(); tasks.pop(); } task(); } }); } } template<class F> void enqueue(F&& f) { { std::unique_lock<std::mutex> lock(queueMutex); tasks.emplace(std::forward<F>(f)); } condition.notify_one(); } ~ThreadPool() { { std::unique_lock<std::mutex> lock(queueMutex); stop = true; } condition.notify_all(); for (std::thread &worker : workers) { worker.join(); } } private: std::vector<std::thread> workers; std::queue<std::function<void()>> 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::this_thread::sleep_for(std::chrono::seconds(1)); std::cout << "Task " << i << " completed" << std::endl; }); } return 0; } 在上面的示例中，通过创建一个ThreadPool类来实现进程池，其中包含了一个线程池的构造函数、任务入队函数enqueue和析构函数。可以通过调用enqueue函数向进程池中添加任务，进程池会自动分配线程来执行这些任务。
