Refactor window library. (#1739)

* Refactor window library.

* Fix project file

* Fix warnings.

1 files changed, 30 insertions, 0 deletions

diff --git a/tools/platform/performance-counter.h b/tools/platform/performance-counter.h
new file mode 100644
index 000000000..e9e990f45
--- /dev/null
+++ b/tools/platform/performance-counter.h
@@ -0,0 +1,30 @@
+#ifndef PLATFORM_PERFORMANCE_COUNTER_H
+#define PLATFORM_PERFORMANCE_COUNTER_H
+
+#include <chrono>
+
+namespace platform
+{
+typedef std::chrono::high_resolution_clock::time_point TimePoint;
+typedef std::chrono::high_resolution_clock::duration Duration;
+
+class PerformanceCounter
+{
+public:
+    static inline TimePoint now()
+    {
+        return std::chrono::high_resolution_clock::now();
+    }
+    static inline Duration getElapsedTime(TimePoint counter) { return now() - counter; }
+    static inline float getElapsedTimeInSeconds(TimePoint counter)
+    {
+        return (float)toSeconds(now() - counter);
+    }
+    static inline double toSeconds(Duration duration)
+    {
+        return std::chrono::duration<float>(duration).count();
+    }
+};
+} // namespace platform
+
+#endif