1 files changed, 144 insertions, 0 deletions
diff --git a/src/system/Qt3DSMemoryProbe.h b/src/system/Qt3DSMemoryProbe.h
new file mode 100644
index 0000000..5f0844e
--- /dev/null
+++ b/src/system/Qt3DSMemoryProbe.h
@@ -0,0 +1,144 @@
+/****************************************************************************
+**
+** 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
+#include "Qt3DSMacros.h"
+
+//==============================================================================
+//	Namespace
+//==============================================================================
+namespace Q3DStudio {
+
+//==============================================================================
+//	Memory Tracking Enums
+//==============================================================================
+
+/// Track a value - remembering peak and add/del count
+enum EMemoryValue {
+    MEMVALUE_ADDS = 0, ///< For example: allocation call count or bytes allocated
+    MEMVALUE_DELETES, ///< For example: free call count or bytes deallocated
+    MEMVALUE_PEAK, ///< Peak of the current value since the last reset
+    MEMVALUE_CURRENT, ///< Current count
+    MEMVALUECOUNT
+};
+
+/// Differentiate between full session (global) or since last reset (local)
+enum EMemoryScope {
+    MEMSCOPE_RESET = 0, ///< Since last reset
+    MEMSCOPE_GLOBAL, ///< Since process start
+    MEMSCOPECOUNT
+};
+
+//==============================================================================
+/**
+ *	Memory allocation counter tracking bytes or calls.
+ *
+ *	A probe instance can be placed to track either number of allocations
+ *	or the bytes of each allocation.  CMemoryManager and CMemoryHeap both
+ *	record statistics using this class.  64 bytes.
+ */
+class CMemoryProbe
+{
+    //==============================================================================
+    //	Structs
+    //==============================================================================
+public:
+    //==============================================================================
+    /**
+     *	Intelligent number that tracks current, peak, incr. and decr.
+     *
+     *	This value remembers how the amount added, the amount deleted, the highest
+     *	value, while keeping a current value.  These are used by CMemoryProbe when
+     *	tracking memory allocations.
+     */
+    struct SValue
+    {
+        //	Fields
+        INT32 m_Value[MEMVALUECOUNT]; ///< Four aspects (add,del,current,peak) we are tracking
+
+        //	Methods
+        SValue() { Reset(); }
+        void Reset()
+        {
+            m_Value[MEMVALUE_ADDS] = 0;
+            m_Value[MEMVALUE_DELETES] = 0;
+            m_Value[MEMVALUE_PEAK] = 0;
+            m_Value[MEMVALUE_CURRENT] = 0;
+        }
+
+        void Delete(INT32 inAmount)
+        {
+            Q3DStudio_ASSERT(inAmount >= 0);
+            m_Value[MEMVALUE_DELETES] += inAmount;
+            m_Value[MEMVALUE_CURRENT] -= inAmount;
+        }
+
+        void Add(INT32 inAmount)
+        {
+            Q3DStudio_ASSERT(inAmount >= 0);
+            m_Value[MEMVALUE_ADDS] += inAmount;
+            m_Value[MEMVALUE_CURRENT] += inAmount;
+            m_Value[MEMVALUE_PEAK] =
+                Q3DStudio_max(m_Value[MEMVALUE_PEAK], m_Value[MEMVALUE_CURRENT]);
+        }
+    };
+
+    //==============================================================================
+    //	Fields
+    //==============================================================================
+protected:
+    SValue m_Calls[MEMSCOPECOUNT]; ///< Memory call count
+    SValue m_Bytes[MEMSCOPECOUNT]; ///< Memory allocation amount
+
+    //==============================================================================
+    //	Methods
+    //==============================================================================
+public: // Constructor
+    CMemoryProbe();
+    ~CMemoryProbe();
+
+public: // Operations
+    void Reset();
+    void Allocate(const INT32 inByteAmount);
+    void Free(const INT32 inByteAmount);
+    void Combine(const CMemoryProbe &inProbe);
+
+public: // Accessors
+    INT32 GetCalls(const EMemoryScope inScope, const EMemoryValue inValue) const
+    {
+        return m_Calls[inScope].m_Value[inValue];
+    }
+    INT32 GetBytes(const EMemoryScope inScope, const EMemoryValue inValue) const
+    {
+        return m_Bytes[inScope].m_Value[inValue];
+    }
+};
+
+} // namespace Q3DStudio