c++怎么实现一个线程安全的队列_c++多线程安全容器设计

#include 
#include 
#include 
#include 

template
class ThreadSafeQueue {
private:
    std::queue data_queue;
    mutable std::mutex mtx;
    std::condition_variable cv;

public:
    ThreadSafeQueue() = default;

    void push(T value) {
        std::lock_guard lock(mtx);
        data_queue.push(std::move(value));
        cv.notify_one(); // 唤醒一个等待的pop线程
    }

    bool try_pop(T& value) {
        std::lock_guard lock(mtx);
        if (data_queue.empty()) {
            return false;
        }
        value = std::move(data_queue.front());
        data_queue.pop();
        return true;
    }

    void wait_and_pop(T& value) {
        std::unique_lock lock(mtx);
        cv.wait(lock, [this] { return !data_queue.empty(); });
        value = std::move(data_queue.front());
        data_queue.pop();
    }

    bool empty() const {
        std::lock_guard lock(mtx);
        return data_queue.empty();
    }

    size_t size() const {
        std::lock_guard lock(mtx);
        return data_queue.size();
    }
};

ThreadSafeQueue task_queue;

// 生产者
auto producer = [&]() {
    for (int i = 0; i < 5; ++i) {
        task_queue.push(i);
        std::this_thread::sleep_for(std::chrono::milliseconds(100));
    }
};

// 消费者
auto consumer = [&]() {
    int value;
    for (int i = 0; i < 5; ++i) {
        task_queue.wait_and_pop(value);
        std::cout << "Consumed: " << value << "\n";
    }
};

std::thread t1(producer);
std::thread t2(consumer);
t1.join(); t2.join();