From b21162cf8e06f40baa1f58be6a8c17435cebc34d Mon Sep 17 00:00:00 2001
From: weidai <weidai@57ff6487-cd31-0410-9ec3-f628ee90f5f0>
Date: Fri, 4 Oct 2002 17:31:41 +0000
Subject: Initial revision

git-svn-id: svn://svn.code.sf.net/p/cryptopp/code/trunk/c5@2 57ff6487-cd31-0410-9ec3-f628ee90f5f0
---
 hrtimer.h | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 hrtimer.h

(limited to 'hrtimer.h')

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
-- 
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