程式碼：

/**
 * 執行緒安全的佇列
 */

#ifndef __THREAD_SAFE_QUEUE__
#define __THREAD_SAFE_QUEUE__
#include <iostream>
#include <queue>
#include <mutex>
#include <condition_variable>

template <class T>
class thread_safe_queue
{
private:
	mutable mutex 		mut;		//鎖
	queue<T> 			data_queue;	//佇列
	condition_variable 	data_cond;	//條件變數
public:
	//建構函式
	thread_safe_queue();
	thread_safe_queue &operator=(const thread_safe_queue&)=delete;

	//可以多傳遞一個額外的條件
	bool wait_and_pop(T &value,atomic_bool &bl);
	bool try_pop(T &value);
	void push(T new_value);
	bool empty() const;

	void notify_all()
	{
		data_cond.notify_all();
	}
};
template <class T>
thread_safe_queue<T>::thread_safe_queue(){}

template <class T>
bool thread_safe_queue<T>::empty() const
{
	lock_guard<mutex> lock(mut);
	return data_queue.empty();
}

template <class T>
void thread_safe_queue<T>::push(T new_value)
{
	lock_guard<mutex> lock(mut);
	data_queue.push(new_value);
	data_cond.notify_one();
}


template <class T>
bool thread_safe_queue<T>::wait_and_pop(T &value,atomic_bool &bl)
{
	unique_lock<mutex> lock(mut);
	
	//避免佇列為空時一直等待
	data_cond.wait(lock,[this,&bl](){return (!this->data_queue.empty())||bl; });

	if(bl&&data_queue.empty())
		return false;

	value=data_queue.front();
	data_queue.pop();
	return true;
}
template<class T>
bool thread_safe_queue<T>::try_pop(T &value)
{
	lock_guard<mutex> lock(mut);
	if(empty())
		return false;

	value=data_queue.front();
	data_queue.pop();
	return true;
}

#endif