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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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#pragma once
+
+//==============================================================================
+// Includes
+//==============================================================================
+#include "Qt3DSMemoryManager.h"
+
+//==============================================================================
+// Namespace
+//==============================================================================
+namespace Q3DStudio {
+
+//==============================================================================
+/**
+ * Static facade to memory statistics and allocation tracking data.
+ *
+ * Use this class to examine the memory state of the system at any point.
+ * Heap, managers and pools are are connected to this point by registering
+ * themselves on creation. Initiate the extraction of the collected data
+ * using this interface.
+ */
+class CMemoryStatistics
+{
+ //==============================================================================
+ // Constants
+ //==============================================================================
+public:
+ const static INT32 REPORTSIZE = 256; ///< Max size of single report string
+ const static INT32 MANAGERCOUNT = 5; ///< Fixed number of managers tracked
+ const static INT32 HISTOGRAMCOUNT = 10; ///< Fixed number of managers tracked
+
+ //==============================================================================
+ // Structs
+ //==============================================================================
+public:
+ /// One row of statistics on allocation
+ struct SFactoid
+ {
+ CHAR m_Name[32]; ///< Ascii identifier - manager name or pool description
+ INT32 m_Bytes; ///< Bytes used - full pool size for example - zero if factoid unused
+ INT32 m_Calls; ///< Function calls, i.e number of allocations
+ INT32 m_Used; ///< Discrete chunk usage in percent - 10 used of 200 gives a value 5
+ INT32 m_Align; ///< Packed efficiency in percent - all 24byte structs in 32byte pool give a
+ ///value 75
+ INT32 m_Miss; ///< Allocation misses - due to full pools for example
+ };
+
+ /// Tuple describing one data point in a histogram
+ struct SHistogramScore
+ {
+ INT32 m_Size; ///< Allocation request in bytes
+ INT32 m_Count; ///< Number of allocation requests
+ };
+
+ /// Set of factoids describing a system memory state
+ struct SFactSheet
+ {
+ SFactoid m_HeapState; ///< Heap facts
+ SFactoid m_ManagerState; ///< Combined manager facts
+ SFactoid m_Manager[MANAGERCOUNT]; ///< Individual manager facts
+ SHistogramScore m_Histogram[MANAGERCOUNT][HISTOGRAMCOUNT]; ///< Top allocation requests
+ ///sorted by bytes, global and
+ ///never reset
+ SFactoid m_Pool[MANAGERCOUNT][Q3DStudio_MEMORY_POOLCOUNT]; ///< Individual pool facts
+ };
+
+ //==============================================================================
+ // Fields
+ //==============================================================================
+protected:
+ static INT32 s_Overhead; ///< Memory tracking structures report in here
+ static CMemoryManager
+ *s_PoolManagers[MANAGERCOUNT]; ///< Pointers to all created memory pool managers
+
+ //==============================================================================
+ // Methods
+ //==============================================================================
+public: // Registration
+ static void AddManager(CMemoryManager *inManager);
+ static void RemoveManager(CMemoryManager *inManager);
+ static INT32 &Overhead();
+
+public: // Access
+ static void Reset();
+ static void GetFacts(SFactSheet &outFacts, const BOOL inPeak = false,
+ const BOOL inGlobal = false);
+ static INT32 GetRequestedBytes(const BOOL inPeak = false);
+ static INT32 GetHeapBytes(const BOOL inPeak = false);
+
+public: // Reporting
+ static void SimpleReport(IStream *inStream = NULL);
+ static void HeapReport(IStream *inStream = NULL);
+ static void PoolReport(const BOOL inPeak = false, const BOOL inGlobal = false,
+ IStream *inStream = NULL);
+ static void LineReport(IStream *inStream = NULL);
+
+ static void FullReport(IStream *inStream = NULL);
+ static void Report(IStream *inStream, const CHAR *inString);
+
+protected: // Utility
+ static void CullHistogram(const CMemoryProbe::SValue *inHistogram, const EMemoryValue inValue,
+ SHistogramScore outResults[HISTOGRAMCOUNT]);
+ static int CompareHeap(const void *arg1, const void *arg2);
+ static int CompareHistogram(const void *arg1, const void *arg2);
+};
+
+} // namespace Q3DStudio