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