简单线程安全队列

#include <iostream>
#include <queue>
#include <mutex>

template <typename T>
class ThreadSafeQueue {
public:
    void push(const T& item) {
        std::lock_guard<std::mutex> lock(mutex_);
        queue_.push(item);
    }

    bool try_pop(T& item) {
        std::lock_guard<std::mutex> lock(mutex_);
        if (queue_.empty()) {
            return false;
        }

        item = queue_.front();
        queue_.pop();
        return true;
    }

    bool empty() const {
        std::lock_guard<std::mutex> lock(mutex_);
        return queue_.empty();
    }

private:
    std::queue<T> queue_;
    mutable std::mutex mutex_;
};