add timer

src/common.h

@@ -34,6 +34,7 @@
 #include <unordered_map>
 #include <algorithm>
 
+#include "timer.hpp"
 #include "averager.hpp"
 
 #include "aftercheaders.h"

src/timer.hpp

@@ -0,0 +1,36 @@
+/*
+ * timer.hpp
+ *
+ *  Created on: Jul 29, 2017
+ *      Author: nullifiedcat
+ */
+
+#pragma once
+
+#include <chrono>
+
+class Timer {
+public:
+	typedef std::chrono::system_clock clock;
+
+	inline Timer() {};
+
+	inline bool check(unsigned ms) const {
+		return std::chrono::duration_cast<std::chrono::milliseconds>(clock::now() - last).count() >= ms;
+	}
+	inline bool test_and_set(unsigned ms) {
+		if (check(ms)) {
+			update();
+			return true;
+		}
+		return false;
+	}
+	inline void update() {
+		last = clock::now();
+	}
+
+public:
+	std::chrono::time_point<clock> last {};
+};
+
+