1 files changed, 107 insertions, 0 deletions
diff --git a/src/foundation/Qt3DSPerfTimer.h b/src/foundation/Qt3DSPerfTimer.h
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+++ b/src/foundation/Qt3DSPerfTimer.h
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+/****************************************************************************
+**
+** Copyright (C) 2008-2012 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT3DS_FOUNDATION_PERFTIMER_H
+#define QT3DS_FOUNDATION_PERFTIMER_H
+
+#include "foundation/Qt3DSFoundation.h"
+#include "foundation/Qt3DSTime.h"
+#include "foundation/Qt3DSRefCounted.h"
+#include "foundation/StringTable.h"
+
+namespace qt3ds {
+namespace foundation {
+
+    class IPerfTimer : public NVRefCounted
+    {
+    protected:
+        virtual ~IPerfTimer() {}
+    public:
+        // amount is in counter frequency units
+        virtual void Update(const char *inTag, QT3DSU64 inAmount) = 0;
+        // Dump current summation of timer data.
+        virtual void OutputTimerData(QT3DSU32 inFrameCount = 0) = 0;
+        virtual void ResetTimerData() = 0;
+
+        static IPerfTimer &CreatePerfTimer(NVFoundationBase &inFoundation);
+    };
+
+    // Specialize this struct to get the perf timer in different contexts.
+    template <typename TTimerProvider>
+    struct STimerProvider
+    {
+        static IPerfTimer &getPerfTimer(TTimerProvider &inProvider)
+        {
+            return inProvider.getPerfTimer();
+        }
+    };
+
+    template <typename TTimerProvider>
+    IPerfTimer &getPerfTimer(TTimerProvider &inProvider)
+    {
+        return STimerProvider<TTimerProvider>::getPerfTimer(inProvider);
+    }
+
+    struct SStackPerfTimer
+    {
+        IPerfTimer *m_Timer;
+        QT3DSU64 m_Start;
+        const char *m_Id;
+
+        SStackPerfTimer(IPerfTimer &destination, const char *inId)
+            : m_Timer(&destination)
+            , m_Start(Time::getCurrentCounterValue())
+            , m_Id(inId)
+        {
+        }
+
+        SStackPerfTimer(IPerfTimer *destination, const char *inId)
+            : m_Timer(destination)
+            , m_Start(Time::getCurrentCounterValue())
+            , m_Id(inId)
+        {
+        }
+
+        ~SStackPerfTimer()
+        {
+            if (m_Timer) {
+                QT3DSU64 theStop = Time::getCurrentCounterValue();
+                QT3DSU64 theAmount = theStop - m_Start;
+                m_Timer->Update(m_Id, theAmount);
+            }
+        }
+    };
+}
+}
+
+#define QT3DS_FOUNDATION_PERF_SCOPED_TIMER(context, name)                                             \
+    SStackPerfTimer __perfTimer(getPerfTimer(context), #name);
+
+#endif
+\ No newline at end of file