Adding Spectre/System/Stopwatch

include/Spectre/System/Stopwatch.h

@@ -0,0 +1,27 @@
+
+#ifndef SPECTRE_SYSTEM_STOPWATCH_H
+#define SPECTRE_SYSTEM_STOPWATCH_H
+
+#include <Spectre/Math/Time.h>
+
+namespace sp {
+
+class Stopwatch {
+public :
+	Stopwatch();
+
+	// Restart the watch. also returns the elapsed time before
+	// the watch was restarted.
+	Time restart();
+
+	// Get the elapsed time since the watch was restarted.
+	Time elapsed() const;
+
+private :
+
+	Time m_start;
+};
+
+} // namespace sp
+
+#endif /* SPECTRE_SYSTEM_STOPWATCH_H */