source: vendor/synergy/current/lib/base/CStopwatch.cpp

/*
 * synergy -- mouse and keyboard sharing utility
 * Copyright (C) 2002 Chris Schoeneman
 * 
 * This package is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * found in the file COPYING that should have accompanied this file.
 * 
 * This package is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include "CStopwatch.h"
#include "CArch.h"

//
// CStopwatch
//

CStopwatch::CStopwatch(bool triggered) :
        m_mark(0.0),
        m_triggered(triggered),
        m_stopped(triggered)
{
        if (!triggered) {
                m_mark = ARCH->time();
        }
}

CStopwatch::~CStopwatch()
{
        // do nothing
}

double
CStopwatch::reset()
{
        if (m_stopped) {
                const double dt = m_mark;
                m_mark = 0.0;
                return dt;
        }
        else {
                const double t  = ARCH->time();
                const double dt = t - m_mark;
                m_mark = t;
                return dt;
        }
}

void
CStopwatch::stop()
{
        if (m_stopped) {
                return;
        }

        // save the elapsed time
        m_mark    = ARCH->time() - m_mark;
        m_stopped = true;
}

void
CStopwatch::start()
{
        m_triggered = false;
        if (!m_stopped) {
                return;
        }

        // set the mark such that it reports the time elapsed at stop()
        m_mark    = ARCH->time() - m_mark;
        m_stopped = false;
}

void
CStopwatch::setTrigger()
{
        stop();
        m_triggered = true;
}

double
CStopwatch::getTime()
{
        if (m_triggered) {
                const double dt = m_mark;
                start();
                return dt;
        }
        else if (m_stopped) {
                return m_mark;
        }
        else {
                return ARCH->time() - m_mark;
        }
}

CStopwatch::operator double()
{
        return getTime();
}

bool
CStopwatch::isStopped() const
{
        return m_stopped;
}

double
CStopwatch::getTime() const
{
        if (m_stopped) {
                return m_mark;
        }
        else {
                return ARCH->time() - m_mark;
        }
}

CStopwatch::operator double() const
{
        return getTime();
}