1 files changed, 61 insertions, 0 deletions
diff --git a/CryptoPP/hrtimer.h b/CryptoPP/hrtimer.h
new file mode 100644
index 000000000..858dbd226
--- /dev/null
+++ b/CryptoPP/hrtimer.h
@@ -0,0 +1,61 @@
+#ifndef CRYPTOPP_HRTIMER_H
+#define CRYPTOPP_HRTIMER_H
+
+#include "config.h"
+#ifndef HIGHRES_TIMER_AVAILABLE
+#include <time.h>
+#endif
+
+NAMESPACE_BEGIN(CryptoPP)
+
+#ifdef HIGHRES_TIMER_AVAILABLE
+	typedef word64 TimerWord;
+#else
+	typedef clock_t TimerWord;
+#endif
+
+//! _
+class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE TimerBase
+{
+public:
+	enum Unit {SECONDS = 0, MILLISECONDS, MICROSECONDS, NANOSECONDS};
+	TimerBase(Unit unit, bool stuckAtZero)	: m_timerUnit(unit), m_stuckAtZero(stuckAtZero), m_started(false) {}
+
+	virtual TimerWord GetCurrentTimerValue() =0;	// GetCurrentTime is a macro in MSVC 6.0
+	virtual TimerWord TicksPerSecond() =0;	// this is not the resolution, just a conversion factor into seconds
+
+	void StartTimer();
+	double ElapsedTimeAsDouble();
+	unsigned long ElapsedTime();
+
+private:
+	double ConvertTo(TimerWord t, Unit unit);
+
+	Unit m_timerUnit;	// HPUX workaround: m_unit is a system macro on HPUX
+	bool m_stuckAtZero, m_started;
+	TimerWord m_start, m_last;
+};
+
+//! measure CPU time spent executing instructions of this thread (if supported by OS)
+/*! /note This only works correctly on Windows NT or later. On Unix it reports process time, and others wall clock time.
+*/
+class ThreadUserTimer : public TimerBase
+{
+public:
+	ThreadUserTimer(Unit unit = TimerBase::SECONDS, bool stuckAtZero = false)	: TimerBase(unit, stuckAtZero) {}
+	TimerWord GetCurrentTimerValue();
+	TimerWord TicksPerSecond();
+};
+
+//! high resolution timer
+class CRYPTOPP_DLL Timer : public TimerBase
+{
+public:
+	Timer(Unit unit = TimerBase::SECONDS, bool stuckAtZero = false)	: TimerBase(unit, stuckAtZero) {}
+	TimerWord GetCurrentTimerValue();
+	TimerWord TicksPerSecond();
+};
+
+NAMESPACE_END
+
+#endif