1 files changed, 104 insertions, 0 deletions
diff --git a/src/Runtime/Source/system/Qt3DSMemoryPool.h b/src/Runtime/Source/system/Qt3DSMemoryPool.h
new file mode 100644
index 00000000..01b2e418
--- /dev/null
+++ b/src/Runtime/Source/system/Qt3DSMemoryPool.h
@@ -0,0 +1,104 @@
+/****************************************************************************
+**
+** 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 "Qt3DSMemoryProbe.h"
+
+//==============================================================================
+//	Namespace
+//==============================================================================
+namespace Q3DStudio {
+
+//==============================================================================
+/**
+ *	Managed memory allocation using fixed-size chunks.
+ *
+ *	The pool class implements a generic algorithm that favors reusing recently
+ *	used memory chunks instead of returning memory continously.  Yet, a fresh
+ *	pool will always return chunks positioned side by side.
+ *
+ *	If a chunk is freed it will be the first to be returned next time a fresh
+ *	chunk is new'ed.  This makes the cache lines happier.  Deleted chunks are
+ *	maintained by linking to each other instead of being stored in a separate
+ *	memory consuming array.
+ */
+class CMemoryPool
+{
+    //==============================================================================
+    //	Fields
+    //==============================================================================
+protected:
+    INT32 m_ChunkSize; ///< size in bytes of each chunk
+    INT32 m_ChunkCount; ///< number of chunks in pool
+
+    INT8 *m_Ceiling; ///< ceiling memory pointer
+    INT8 *m_Memory; ///< base memory pointer, INT8 for easy pointer arithemtic
+    INT8 *m_Top; ///< edge of free continous memory
+    void *m_Hole; ///< first dis-continous memory chunk if any
+
+    CMemoryProbe m_Probe; ///< call and byte data on pool usage
+    CHAR m_Description[32]; ///< short description of this pool
+
+    //==============================================================================
+    //	Methods
+    //==============================================================================
+public: // Construction
+    CMemoryPool();
+    ~CMemoryPool();
+
+public: // Initialization
+    void Initialize(const CHAR *inName, const INT32 inChunkSize, const INT32 inChunkCount);
+    void Release();
+
+public: // Allocation and Deallocation
+    void *Allocate();
+    void Free(void *inChunk);
+    BOOL IsFull() const;
+    BOOL OwnsChunk(const void *inChunk) const;
+
+protected: // Implementation
+    void *UseTop();
+    void PushHole(void *inChunk);
+    void *PopHole();
+
+public: // Statistics and reports
+    INT32 GetFreeHoles() const;
+    INT32 GetFreeTops() const;
+    INT32 GetFreeChunks() const;
+    INT32 GetChunkSize() const { return m_ChunkSize; }
+    INT32 GetChunkCount() const { return m_ChunkCount; }
+    CMemoryProbe &GetProbe() { return m_Probe; }
+};
+
+} // namespace Q3DStudio