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65 lines
2.6 KiB
C++
65 lines
2.6 KiB
C++
// Created on: 2005-03-15
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// Created by: Peter KURNEV
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// Copyright (c) 2005-2014 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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#ifndef _Standard_MMgrRoot_HeaderFile
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#define _Standard_MMgrRoot_HeaderFile
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#include <Standard_TypeDef.hxx>
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/**
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* Root class for Open CASCADE mmemory managers.
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* Defines only abstract interface functions.
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*/
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class Standard_MMgrRoot
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{
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public:
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//! Virtual destructor; required for correct inheritance
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Standard_EXPORT virtual ~Standard_MMgrRoot();
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//! Allocate specified number of bytes.
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//! The actually allocated space should be rounded up to
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//! double word size (4 bytes), as this is expected by implementation
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//! of some classes in OCC (e.g. TCollection_AsciiString)
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Standard_EXPORT virtual Standard_Address Allocate (const Standard_Size theSize)=0;
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//! Reallocate previously allocated memory to contain at least theSize bytes.
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//! In case of success, new pointer is returned.
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Standard_EXPORT virtual Standard_Address Reallocate (Standard_Address thePtr,
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const Standard_Size theSize)=0;
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//! Frees previously allocated memory at specified address.
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Standard_EXPORT virtual void Free(Standard_Address thePtr)=0;
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//! Purge internally cached unused memory blocks (if any)
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//! by releasing them to the operating system.
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//! Must return non-zero if some memory has been actually released,
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//! or zero otherwise.
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//!
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//! If option isDestroyed is True, this means that memory
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//! manager is not expected to be used any more; note however
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//! that in general case it is still possible to have calls to that
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//! instance of memory manager after this (e.g. to free memory
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//! of static objects in OCC). Thus this option should
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//! command the memory manager to release any cached memory
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//! to the system and not cache any more, but still remain operable...
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//!
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//! Default implementation does nothing and returns 0.
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Standard_EXPORT virtual Standard_Integer Purge(Standard_Boolean isDestroyed=Standard_False);
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};
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#endif
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