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/****************************************************************************
**
** Copyright (C) 1993-2009 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "SystemPrefix.h"
//==============================================================================
// Includes
//==============================================================================
#include "Qt3DSTimer.h"
//==============================================================================
// Namespace
//==============================================================================
namespace Q3DStudio {
//==============================================================================
/**
* Constructor
*/
CTimer::CTimer(ITimeProvider &inProvider)
: m_TimeProvider(inProvider)
, m_IsRunning(false)
{
Start();
}
//==============================================================================
/**
* Start the timer
*/
void CTimer::Start()
{
if (!m_IsRunning)
m_StartTime = m_TimeProvider.GetCurrentTimeMicroSeconds();
m_IsRunning = true;
}
//==============================================================================
/**
* Stop the timer
*/
void CTimer::Stop()
{
if (m_IsRunning)
m_StartTime = m_TimeProvider.GetCurrentTimeMicroSeconds() - m_StartTime;
m_IsRunning = false;
}
//==============================================================================
/**
* Reset the timer
*/
void CTimer::Reset()
{
if (m_IsRunning)
m_StartTime = m_TimeProvider.GetCurrentTimeMicroSeconds();
else
m_StartTime = 0;
}
//==============================================================================
/**
* Gets the current time in milliseconds.
* @return the current time since timer was started(in miliseconds),
* or time when it was stopped
*/
TTimeUnit CTimer::GetTimeMilliSecs()
{
return GetTimeMicroSecs() / 1000;
}
//=============================================================================
/**
* Get the number of usecs elapsed since start was called.
* If the timer is running then this will return the time from when start was
* called. If the timer is stopped then this will return the amount of time
* between the start and last stop.
* @return returns the elasped micro second.
*/
TMicroSeconds CTimer::GetTimeMicroSecs()
{
if (m_IsRunning)
return m_TimeProvider.GetCurrentTimeMicroSeconds() - m_StartTime;
else
return m_StartTime;
}
} // namespace Q3DStudio
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