/*
 * barrier -- mouse and keyboard sharing utility
 * Copyright (C) 2012-2016 Symless Ltd.
 * 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 LICENSE 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "base/Stopwatch.h"
#include "arch/Arch.h"

//
// Stopwatch
//

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

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

double
Stopwatch::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
Stopwatch::stop()
{
    if (m_stopped) {
        return;
    }

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

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

double
Stopwatch::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;
    }
}

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

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

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

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