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Diffstat (limited to 'src/Runtime/Source/system/Qt3DSTimer.h')
-rw-r--r-- | src/Runtime/Source/system/Qt3DSTimer.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/Runtime/Source/system/Qt3DSTimer.h b/src/Runtime/Source/system/Qt3DSTimer.h new file mode 100644 index 00000000..278bd4b4 --- /dev/null +++ b/src/Runtime/Source/system/Qt3DSTimer.h @@ -0,0 +1,142 @@ +/**************************************************************************** +** +** 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#pragma once + +//============================================================================== +// Includes +//============================================================================== +#include "Qt3DSITimer.h" + +//============================================================================== +// Namespace +//============================================================================== +namespace Q3DStudio { + +//============================================================================== +// Forwards +//============================================================================== + +//============================================================================== +/** + * Time provider interface abstracting time from the usage of time. + */ +class ITimeProvider +{ +protected: + virtual ~ITimeProvider() {} +public: + virtual INT64 GetCurrentTimeMicroSeconds() = 0; +}; + +// Pause in a way that is completely transparent to the underlying system. +class CPausingTimeProvider : public ITimeProvider +{ + ITimeProvider &m_Provider; + INT64 m_PauseOffset; + INT64 m_Offset; + bool m_Paused; + +public: + CPausingTimeProvider(ITimeProvider &inProvider) + : m_Provider(inProvider) + , m_PauseOffset(0) + , m_Offset(0) + , m_Paused(false) + { + } + + INT64 GetCurrentTimeMicroSeconds() override + { + INT64 currentTime = 0; + if (m_Paused) + currentTime = m_PauseOffset; + else + currentTime = m_Provider.GetCurrentTimeMicroSeconds(); + + return currentTime - m_Offset; + } + + void Pause() + { + if (!m_Paused) { + m_Paused = true; + m_PauseOffset = m_Provider.GetCurrentTimeMicroSeconds(); + } + } + + void UnPause() + { + if (m_Paused) { + m_Paused = false; + INT64 timePaused = m_Provider.GetCurrentTimeMicroSeconds() - m_PauseOffset; + m_Offset += timePaused; + } + } + + bool IsPaused() { return m_Paused; } + + void Reset() { m_PauseOffset = m_Offset = 0; } +}; + +//============================================================================== +/** + * @class CTimer + * @brief A very simple platform optimized utility class to return lapsed time + * + * Gets current time based on the time lapsed from the point where timer is started. + */ + +class CTimer : public ITimer +{ + + //============================================================================== + // Fields + //============================================================================== +protected: + ITimeProvider &m_TimeProvider; + INT64 m_StartTime; + BOOL m_IsRunning; // Whether this timer is running or stopped + + //============================================================================== + // Methods + //============================================================================== +public: // Construction + CTimer(ITimeProvider &inProvider); + +public: // Operation + void Start() override; + void Stop() override; + void Reset() override; + TTimeUnit GetTimeMilliSecs() override; + TMicroSeconds GetTimeMicroSecs() override; +}; + +} // namespace Q3DStudio |