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87 lines
3.6 KiB
C++
87 lines
3.6 KiB
C++
// Created on: 2002-04-12
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// Created by: Alexander KARTOMIN (akm)
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// Copyright (c) 2002-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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// Purpose: Basic class for memory allocation wizards.
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// Defines the interface for devising different allocators
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// firstly to be used by collections of NCollection, though it
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// it is not deferred. It allocates/frees the memory through
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// Standard procedures, thus it is unnecessary (and sometimes
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// injurious) to have more than one such allocator. To avoid
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// creation of multiple objects the constructors were maid
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// inaccessible. To create the BaseAllocator use the method
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// CommonBaseAllocator.
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// Note that this object is managed by Handle.
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#ifndef NCollection_BaseAllocator_HeaderFile
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#define NCollection_BaseAllocator_HeaderFile
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#include <MMgt_TShared.hxx>
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#include <Standard_Type.hxx>
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#include <NCollection_TypeDef.hxx>
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/**
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* Purpose: Basic class for memory allocation wizards.
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* Defines the interface for devising different allocators
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* firstly to be used by collections of NCollection, though it
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* it is not deferred. It allocates/frees the memory through
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* Standard procedures, thus it is unnecessary (and sometimes
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* injurious) to have more than one such allocator. To avoid
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* creation of multiple objects the constructors were maid
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* inaccessible. To create the BaseAllocator use the method
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* CommonBaseAllocator.
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* Note that this object is managed by Handle.
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*/
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class NCollection_BaseAllocator : public MMgt_TShared
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{
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public:
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// ---------- PUBLIC METHODS ------------
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Standard_EXPORT virtual void* Allocate (const size_t size);
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Standard_EXPORT virtual void Free (void * anAddress);
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//! CommonBaseAllocator
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//! This method is designed to have the only one BaseAllocator (to avoid
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//! useless copying of collections). However one can use operator new to
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//! create more BaseAllocators, but it is injurious.
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Standard_EXPORT static const Handle(NCollection_BaseAllocator)&
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CommonBaseAllocator(void);
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//! Callback function to register alloc/free calls
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Standard_EXPORT static void StandardCallBack
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(const Standard_Boolean theIsAlloc,
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const Standard_Address theStorage,
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const Standard_Size theRoundSize,
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const Standard_Size theSize);
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//! Prints memory usage statistics cumulated by StandardCallBack
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Standard_EXPORT static void PrintMemUsageStatistics();
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protected:
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//! Constructor - prohibited
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NCollection_BaseAllocator(void) {}
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private:
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//! Copy constructor - prohibited
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NCollection_BaseAllocator(const NCollection_BaseAllocator&);
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public:
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// ---------- CasCade RunTime Type Information
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DEFINE_STANDARD_RTTIEXT(NCollection_BaseAllocator,MMgt_TShared)
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};
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DEFINE_STANDARD_HANDLE(NCollection_BaseAllocator,MMgt_TShared)
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#endif
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