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86 lines
3.4 KiB
C++
Executable File
86 lines
3.4 KiB
C++
Executable File
// Created on: 2005-03-15
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// Created by: Peter KURNEV
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// Copyright (c) 2005-2012 OPEN CASCADE SAS
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//
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// The content of this file is subject to the Open CASCADE Technology Public
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// License Version 6.5 (the "License"). You may not use the content of this file
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// except in compliance with the License. Please obtain a copy of the License
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// at http://www.opencascade.org and read it completely before using this file.
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//
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// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
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// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
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//
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// The Original Code and all software distributed under the License is
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// distributed on an "AS IS" basis, without warranty of any kind, and the
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// Initial Developer hereby disclaims all such warranties, including without
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// limitation, any warranties of merchantability, fitness for a particular
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// purpose or non-infringement. Please see the License for the specific terms
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// and conditions governing the rights and limitations under the License.
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#ifndef _Standard_MMgrRoot_HeaderFile
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#define _Standard_MMgrRoot_HeaderFile
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#ifndef _Standard_Address_HeaderFile
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#include <Standard_Address.hxx>
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#endif
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#ifndef _Standard_Integer_HeaderFile
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#include <Standard_Integer.hxx>
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#endif
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#ifndef _Standard_Macro_HeaderFile
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#include <Standard_Macro.hxx>
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#endif
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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, aPtr should be nullified and new pointer returned.
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Standard_EXPORT virtual Standard_Address Reallocate (Standard_Address& aPtr,
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const Standard_Size theSize)=0;
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//! Frees previously allocated memory at specified address.
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//! The pointer is nullified.
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Standard_EXPORT virtual void Free(Standard_Address& aPtr)=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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//! Set reentrant mode on or off.
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//! Note: This method may be called only when no any other thread can
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//! access this object simultaneously.
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//! Default implementation does nothing.
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Standard_EXPORT virtual void SetReentrant(Standard_Boolean isReentrant);
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};
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#endif
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