1 files changed, 43 insertions, 0 deletions
diff --git a/hrtimer.h b/hrtimer.h
new file mode 100644
index 0000000..81d9fcd
--- /dev/null
+++ b/hrtimer.h
@@ -0,0 +1,43 @@
+#ifndef CRYPTOPP_HRTIMER_H
+#define CRYPTOPP_HRTIMER_H
+
+#include "config.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+#ifdef HIGHRES_TIMER_AVAILABLE
+
+//! high resolution timer
+class Timer
+{
+public:
+	enum Unit {SECONDS, MILLISECONDS, MICROSECONDS};
+	Timer(Unit unit, bool stuckAtZero = false)	: m_timerUnit(unit), m_stuckAtZero(stuckAtZero), m_started(false) {}
+
+	static word64 GetCurrentTimerValue();	// GetCurrentTime is a macro in MSVC 6.0
+	static unsigned long ConvertTo(word64 t, Unit unit);
+
+	// this is not the resolution, just a conversion factor into milliseconds
+	static inline unsigned int TicksPerMillisecond()
+	{
+#if defined(CRYPTOPP_WIN32_AVAILABLE)
+		return 10000;
+#elif defined(__unix__) || defined(macintosh)
+		return 1000;
+#endif
+	}
+
+	void StartTimer();
+	unsigned long ElapsedTime();
+
+private:
+	Unit m_timerUnit;	// HPUX workaround: m_unit is a system macro on HPUX
+	bool m_stuckAtZero, m_started;
+	word64 m_start;
+};
+
+#endif
+
+NAMESPACE_END
+
+#endif