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67 lines
1.4 KiB
67 lines
1.4 KiB
//
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// Created by 马也驰 on 2024/12/28.
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//
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#ifndef LEVELDB_THREADPOOL_H
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#define LEVELDB_THREADPOOL_H
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#include <iostream>
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#include <vector>
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#include <thread>
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#include <queue>
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#include <functional>
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#include <condition_variable>
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#include <atomic>
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class ThreadPool {
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public:
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explicit ThreadPool(size_t numThreads) : stop(false) {
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for (size_t i = 0; i < numThreads; ++i) {
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workers.emplace_back([this]() {
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while (true) {
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std::function<void()> task;
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{
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std::unique_lock<std::mutex> lock(queueMutex);
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condition.wait(lock, [this]() { return stop || !tasks.empty(); });
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if (stop && tasks.empty()) return;
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task = std::move(tasks.front());
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tasks.pop();
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}
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task();
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}
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});
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}
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}
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~ThreadPool() {
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{
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std::unique_lock<std::mutex> lock(queueMutex);
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stop = true;
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}
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condition.notify_all();
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for (std::thread &worker : workers) {
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worker.join();
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}
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}
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void enqueue(std::function<void()> task) {
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{
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std::unique_lock<std::mutex> lock(queueMutex);
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tasks.push(std::move(task));
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}
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condition.notify_one();
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}
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private:
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std::vector<std::thread> workers;
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std::queue<std::function<void()>> tasks;
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std::mutex queueMutex;
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std::condition_variable condition;
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std::atomic<bool> stop;
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};
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#endif // LEVELDB_THREADPOOL_H
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