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0001 // Created on: 2002-04-12 0002 // Created by: Alexander KARTOMIN (akm) 0003 // Copyright (c) 2002-2023 OPEN CASCADE SAS 0004 // 0005 // This file is part of Open CASCADE Technology software library. 0006 // 0007 // This library is free software; you can redistribute it and/or modify it under 0008 // the terms of the GNU Lesser General Public License version 2.1 as published 0009 // by the Free Software Foundation, with special exception defined in the file 0010 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT 0011 // distribution for complete text of the license and disclaimer of any warranty. 0012 // 0013 // Alternatively, this file may be used under the terms of Open CASCADE 0014 // commercial license or contractual agreement. 0015 0016 // Purpose: Basic class for memory allocation wizards. 0017 // Defines the interface for devising different allocators 0018 // firstly to be used by collections of NCollection, though it 0019 // it is not deferred. It allocates/frees the memory through 0020 // Standard procedures, thus it is unnecessary (and sometimes 0021 // injurious) to have more than one such allocator. To avoid 0022 // creation of multiple objects the constructors were maid 0023 // inaccessible. To create the BaseAllocator use the method 0024 // CommonBaseAllocator. 0025 // Note that this object is managed by Handle. 0026 0027 #ifndef NCollection_BaseAllocator_HeaderFile 0028 #define NCollection_BaseAllocator_HeaderFile 0029 0030 #include <Standard_DefineHandle.hxx> 0031 #include <Standard_Transient.hxx> 0032 0033 /** 0034 * Purpose: Basic class for memory allocation wizards. 0035 * Defines the interface for devising different allocators 0036 * firstly to be used by collections of NCollection, though it 0037 * it is not deferred. It allocates/frees the memory through 0038 * Standard procedures, thus it is unnecessary (and sometimes 0039 * injurious) to have more than one such allocator. To avoid 0040 * creation of multiple objects the constructors were maid 0041 * inaccessible. To create the BaseAllocator use the method 0042 * CommonBaseAllocator. 0043 * Note that this object is managed by Handle. 0044 */ 0045 class NCollection_BaseAllocator : public Standard_Transient 0046 { 0047 public: 0048 // ---------- PUBLIC METHODS ------------ 0049 Standard_EXPORT virtual void* Allocate (const size_t theSize); 0050 Standard_EXPORT virtual void* AllocateOptimal(const size_t theSize); 0051 Standard_EXPORT virtual void Free (void* theAddress); 0052 0053 //! CommonBaseAllocator 0054 //! This method is designed to have the only one BaseAllocator (to avoid 0055 //! useless copying of collections). However one can use operator new to 0056 //! create more BaseAllocators, but it is injurious. 0057 Standard_EXPORT static const Handle(NCollection_BaseAllocator)& 0058 CommonBaseAllocator(void); 0059 0060 protected: 0061 //! Constructor - prohibited 0062 NCollection_BaseAllocator() {} 0063 0064 private: 0065 //! Copy constructor - prohibited 0066 NCollection_BaseAllocator(const NCollection_BaseAllocator&) = delete; 0067 0068 public: 0069 // ---------- CasCade RunTime Type Information 0070 DEFINE_STANDARD_RTTIEXT(NCollection_BaseAllocator,Standard_Transient) 0071 }; 0072 DEFINE_STANDARD_HANDLE(NCollection_BaseAllocator,Standard_Transient) 0073 0074 #endif
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