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BUG#: 2651
TITLE: Stopwatch does not allow accumulation

DESCRIPTION: Add start() and stop() methods to Stopwatch to 1) allow the
measurement of specific time intervals, and 2) allow accumulation of multiple
intervals. That is, the Stopwatch can be started and stopped multiple times and
the sum of multiple intervals will be returned when getElapsed is called. Update
numerous test cases that use this object.

//%2005////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation, The Open Group.
// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; VERITAS Software Corporation; The Open Group.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
// ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
// "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
// LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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//==============================================================================
//
// Author: Mike Brasher (mbrasher@bmc.com)
//
// Modified By:
//      Chip Vincent (cvincent@us.ibm.com)
//
//%/////////////////////////////////////////////////////////////////////////////
#include "Stopwatch.h"

#include <Pegasus/Common/TimeValue.h>
#include <Pegasus/Common/System.h>

#include <iostream>

PEGASUS_NAMESPACE_BEGIN

Stopwatch::Stopwatch(void) : _start(0), _stop(0), _total(0)
{
}

void Stopwatch::start(void)
{
    _start = TimeValue::getCurrentTime().toMilliseconds();
}

void Stopwatch::stop(void)
{
    _stop = TimeValue::getCurrentTime().toMilliseconds();

    // update total
    _total += double(_stop - _start);
}

void Stopwatch::reset(void)
{
    _start = 0;
    _stop = 0;
    _total = 0;
}

double Stopwatch::getElapsed(void) const
{
    return(_total / 1000.0);
}

void Stopwatch::printElapsed(void)
{
    PEGASUS_STD(cout) << getElapsed() << " seconds" << PEGASUS_STD(endl);
}

PEGASUS_NAMESPACE_END