CUtilityCode

(1) 基于boost的生产者/消费者队列

template<typenameData>
classconcurrent_queue   

{   

private:  

    std::queue<Data> the_queue;  

    mutableboost::mutex the_mutex;   

    boost::condition_variable the_condition_variable;  

public:  

    void push(Data const& data)  

    {  

        boost::mutex::scoped_lock lock(the_mutex);  

        the_queue.push(data);  

        lock.unlock();  

        the_condition_variable.notify_one();  

    }  

    bool empty() const  

    {  

        boost::mutex::scoped_lock lock(the_mutex);  

        returnthe_queue.empty();   

    }  

    bool try_pop(Data& popped_value)   

    {  

        boost::mutex::scoped_lock lock(the_mutex);  

        if(the_queue.empty())  

        {  

            returnfalse;  

        }  

        popped_value=the_queue.front();  

        the_queue.pop();  

        returntrue;  

    }  

    void wait_and_pop(Data& popped_value)
    {  

        boost::mutex::scoped_lock lock(the_mutex);  

        while(the_queue.empty())  

        {  

            the_condition_variable.wait(lock);  

        }  

        popped_value=the_queue.front();  

        the_queue.pop();  

    }  

};