一个C++的BlockingQueue实现

原文在

http://www.justsoftwaresolutions.co.uk/threading/implementing-a-thread-safe-queue-using-condition-variables.html

template<typename Data>class concurrent_queue{private: std::queue<Data> the_queue; mutable boost::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); return the_queue.empty(); } bool try_pop(Data& popped_value) { boost::mutex::scoped_lock lock(the_mutex); if(the_queue.empty()) { return false; } popped_value=the_queue.front(); the_queue.pop(); return true; } 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(); }};