From 1c62f61f4b90972b7e1c00b9056b13fb428a4694 Mon Sep 17 00:00:00 2001
From: granzuglia <guido.ranzuglia@isti.cnr.it>
Date: Fri, 3 Jul 2015 06:01:15 +0000
Subject: [PATCH] - added new file, minimized and cleaned up in order to avoid
 proliferation of useless included files in the code

---
 wrap/system/memory_info.h | 117 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 wrap/system/memory_info.h

diff --git a/wrap/system/memory_info.h b/wrap/system/memory_info.h
new file mode 100644
index 00000000..7471ef10
--- /dev/null
+++ b/wrap/system/memory_info.h
@@ -0,0 +1,117 @@
+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2004                                                \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* This program is free software; you can redistribute it and/or modify      *
+* it under the terms of the GNU General Public License as published by      *
+* the Free Software Foundation; either version 2 of the License, or         *
+* (at your option) any later version.                                       *
+*                                                                           *
+* This program is distributed in the hope that it will be useful,           *
+* but WITHOUT ANY WARRANTY; without even the implied warranty of            *
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
+* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+
+#ifndef __MEMORY_INFO_H
+#define __MEMORY_INFO_H
+
+#include <stdexcept>
+
+namespace vcg 
+{
+	//WARNING: All the classes derived from MemoryInfo has been intended to be instantiated as a singleton in the host application 
+	//(i.e. in every application using it just an instance of a class derived from MemoryInfo should be declared).
+
+	class MemoryInfo
+	{
+	public:
+		class MemoryInfoException : public std::exception
+		{
+		public:
+			MemoryInfoException(const char* text)
+				:std::exception(),_exctext(text){}
+
+			~MemoryInfoException() throw() {}
+			inline const char* what() const throw() {return _exctext;}
+		private:
+			const char* _exctext;
+		};
+
+		MemoryInfo(long long unsigned int originalmem)
+			:_originaltotalmemory(originalmem),_currentfreememory(_originaltotalmemory)
+		{       
+		}
+
+		virtual ~MemoryInfo() {}
+		virtual void acquiredMemory(long long unsigned int mem) = 0;
+		virtual long long unsigned int usedMemory() const = 0;
+		virtual long long unsigned int currentFreeMemory() const = 0;
+		virtual void releasedMemory(long long unsigned int mem = 0) = 0;
+		virtual bool isAdditionalMemoryAvailable(long long unsigned int mem) = 0;
+
+	protected:
+		const long long unsigned int _originaltotalmemory;
+		long long unsigned int _currentfreememory;
+	};
+
+	//WARNING: this is not a thread safe class. The object derived from MemoryInfo are intended to be used inside GLMeshAttributeFeeder as static variable in order to manage the available GPUMemory.
+	//We strongly recommend you to define in your code a thread safe version of the class, defining mutexed access member functions. 
+	//This class should be consider just as a basic example for the implementations of the required functionalities. 
+	//It is safe to use it just when the user has only one mesh to pass to the GPU.
+
+	class NotThreadSafeMemoryInfo : public MemoryInfo
+	{
+	public:
+		NotThreadSafeMemoryInfo(long long unsigned int originalmem)
+			:MemoryInfo(originalmem)
+		{
+		}
+
+		~NotThreadSafeMemoryInfo() {}
+
+		void acquiredMemory(long long unsigned int mem)
+		{
+			if (mem > _originaltotalmemory)
+				throw MemoryInfo::MemoryInfoException("It has been requested more memory than the total one.\\n");
+			else 
+				if (mem > _currentfreememory)
+					throw MemoryInfo::MemoryInfoException("It has been requested more memory than the free available one.\\n");
+				else
+					_currentfreememory -= mem;
+		}
+
+		long long unsigned int usedMemory() const
+		{
+			return _originaltotalmemory - _currentfreememory;
+		}
+
+		long long unsigned int currentFreeMemory() const
+		{
+			return _currentfreememory;
+		}
+
+		void releasedMemory(long long unsigned int mem = 0)
+		{
+			if (mem > _originaltotalmemory)
+				throw MemoryInfo::MemoryInfoException("It has been released more memory than the total one. Something strange happened!\\n");
+			else
+				_currentfreememory += mem;
+		}
+
+		bool isAdditionalMemoryAvailable(long long unsigned int mem)
+		{
+			return (_currentfreememory >= mem);
+		}
+	};
+};
+
+#endif
\ No newline at end of file