using ring buffer

src/Queue.h

@@ -9,7 +9,7 @@
 #include <mutex>
 #include <unordered_set>
 
-#define MAX_QUEUE_SIZE 10
+#define MAX_QUEUE_SIZE 100
 
 template<typename T>
 class Queue {
@@ -36,7 +36,9 @@ protected:
 		return tail == head;
 	}
 	size_t size() const {
-		return container.size();
+		if (tail > head)
+			return tail - head;
+		return MAX_QUEUE_SIZE - head + tail;
 	}
 	T * pop(){
 		mutex.lock();