Stopwatch.cc

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "pedigree/kernel/time/Stopwatch.h"
#include "pedigree/kernel/time/Time.h"
#include "pedigree/kernel/utilities/assert.h"

namespace Time
{
Stopwatch::Stopwatch(bool startRunning)
    : m_Value(0), m_StartValue(), m_bRunning(startRunning)
{
    reset();

    if (startRunning)
    {
        start();
    }
}

Stopwatch::~Stopwatch()
{
}

void Stopwatch::start()
{
    m_bRunning = true;
    m_StartValue = Time::getTicks();
}

void Stopwatch::stop()
{
    assert(m_bRunning);
    m_bRunning = false;
    Timestamp now = Time::getTicks();
    m_Value += now - m_StartValue;
}

void Stopwatch::reset()
{
    m_Value = 0;
    m_StartValue = 0;
    m_bRunning = false;
}

Timestamp Stopwatch::value()
{
    return m_Value;
}
}  // namespace Time