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- #include <iostream>
- #include <queue>
- #include <thread>
- #include <mutex>
- #include <condition_variable>
- 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<void()> task;
- {
- std::unique_lock<std::mutex> lock(queueMutex);
- condition.wait(lock, [this] { return stop || !tasks.empty(); });
- if (stop && tasks.empty()) {
- return;
- }
- task = std::move(tasks.front());
- tasks.pop();
- }
- task();
- }
- });
- }
- }
- template <class F, class... Args>
- void enqueue(F&& f, Args&&... args) {
- {
- std::unique_lock<std::mutex> lock(queueMutex);
- tasks.emplace([=] { std::forward<F>(f)(std::forward<Args>(args)...); });
- }
- 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;
- };
- void printNumber(int number) {
- std::cout << "Number: " << number << std::endl;
- }
- int main() {
- ThreadPool pool(4);
- for (int i = 0; i < 10; ++i) {
- pool.enqueue(printNumber, i);
- }
- return 0;
- }
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