ThreadSafeQueue.hh

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// C++ Includes
#include <queue>
#include <thread>
#include <functional>
#include <mutex>
#include <condition_variable>
 
namespace utils {
 
template<typename T>
class ThreadSafeQueue {
private:
    std::queue<T> _queue;
    std::mutex _mutex;
    std::condition_variable _cv;
 
public:
    void push(T value) {
 
        {
            std::lock_guard<std::mutex> lock(_mutex);
            _queue.push(std::move(value));
        }
        _cv.notify_one();
    }
 
    T wait_and_pop() {
        std::unique_lock<std::mutex> lock(_mutex);
        _cv.wait(lock, [&] { return !_queue.empty(); });
        T val = std::move(_queue.front());
        _queue.pop();
        return val;
    }
};
} // End utils namespace