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// File: NCollection_BaseAllocator.hxx
// Created: Fri Apr 12 09:22:55 2002
// Author: Alexander KARTOMIN (akm)
// <a-kartomin@opencascade.com>
//
// Purpose: Basic class for memory allocation wizards.
// Defines the interface for devising different allocators
// firstly to be used by collections of NCollection, though it
// it is not deferred. It allocates/frees the memory through
// Standard procedures, thus it is unnecessary (and sometimes
// injurious) to have more than one such allocator. To avoid
// creation of multiple objects the constructors were maid
// inaccessible. To create the BaseAllocator use the method
// CommonBaseAllocator.
// Note that this object is managed by Handle.
//
#ifndef NCollection_BaseAllocator_HeaderFile
#define NCollection_BaseAllocator_HeaderFile
#include <MMgt_TShared.hxx>
#include <Standard_DefineHandle.hxx>
#include <NCollection_TypeDef.hxx>
class Handle(NCollection_BaseAllocator);
/**
* Purpose: Basic class for memory allocation wizards.
* Defines the interface for devising different allocators
* firstly to be used by collections of NCollection, though it
* it is not deferred. It allocates/frees the memory through
* Standard procedures, thus it is unnecessary (and sometimes
* injurious) to have more than one such allocator. To avoid
* creation of multiple objects the constructors were maid
* inaccessible. To create the BaseAllocator use the method
* CommonBaseAllocator.
* Note that this object is managed by Handle.
*/
class NCollection_BaseAllocator : public MMgt_TShared
{
public:
// ---------- PUBLIC METHODS ------------
Standard_EXPORT virtual void* Allocate (const size_t size);
Standard_EXPORT virtual void Free (void * anAddress);
//! CommonBaseAllocator
//! This method is designed to have the only one BaseAllocator (to avoid
//! useless copying of collections). However one can use operator new to
//! create more BaseAllocators, but it is injurious.
Standard_EXPORT static const Handle(NCollection_BaseAllocator)&
CommonBaseAllocator(void);
//! Callback function to register alloc/free calls
Standard_EXPORT static void StandardCallBack
(const Standard_Boolean theIsAlloc,
const Standard_Address theStorage,
const Standard_Size theRoundSize,
const Standard_Size theSize);
//! Prints memory usage statistics cumulated by StandardCallBack
Standard_EXPORT static void PrintMemUsageStatistics();
protected:
//! Constructor - prohibited
NCollection_BaseAllocator(void) {};
private:
//! Copy constructor - prohibited
NCollection_BaseAllocator(const NCollection_BaseAllocator&);
public:
// ---------- CasCade RunTime Type Information
DEFINE_STANDARD_RTTI(NCollection_BaseAllocator)
};
DEFINE_STANDARD_HANDLE(NCollection_BaseAllocator,MMgt_TShared)
#endif
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