//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2011 EMC Corp.
//
//	@filename:
//		CWallClock.h
//
//	@doc:
//		A timer which records wall clock time;
//---------------------------------------------------------------------------
#ifndef GPOS_CWallClock_H
#define GPOS_CWallClock_H

#include "gpos/common/ITimer.h"

namespace gpos
{
//---------------------------------------------------------------------------
//	@class:
//		CWallClock
//
//	@doc:
//		Records wall clock time;
//
//---------------------------------------------------------------------------
class CWallClock : public ITimer
{
private:
	// actual timer
	TIMEVAL m_time;

public:
	// ctor
	CWallClock(BOOL start)
	{
		if (start)
			Restart();
	}

	// retrieve elapsed wall-clock time in micro-seconds
	ULONG ElapsedUS() const override;

	// restart timer
	void Restart() override;
};

}  // namespace gpos

#endif	// !GPOS_CWallClock_H

// EOF