Leaked source code of windows server 2003
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//+---------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1992 - 1994.
//
// File: freelist.hxx
//
// Contents: CFreeList classes
//
// History: 07-Jul-94 BobDay Created
//
//----------------------------------------------------------------------------
#ifndef __FREELIST_HXX__
#define __FREELIST_HXX__
//+---------------------------------------------------------------------------
//
// Class: CFreeList (fl)
//
// Purpose: Implements a block allocator with replaceable underlying
// memory strategies
//
// Interface: AllocElement - To allocate a proxy
// ReleaseElement - To return an element to the free pool
// AllocBlock - Callback for block allocation
// GetElementNextPtr - Callback for list traversal
//
// Notes: At some point we might want to make this have one free list per
// block. Then we would easily be able to tell which blocks have
// all free elements within them and we able to be freed.
//
// History: 6-01-94 JohannP (Johann Posch) Created
// 6-29-94 BobDay (Bob Day) Made list based
//
//----------------------------------------------------------------------------
class CFreeList{public: DWORD AllocElement( void ); void FreeElement( DWORD dwElement ); void FreeMemoryBlocks( void );
CFreeList( CMemoryModel *pmm, UINT iElementSize, UINT iElementsPerBlock, UINT iNextPtrOffset );private: CMemoryModel *m_pmm;
DWORD m_iElementSize; DWORD m_iElementsPerBlock; DWORD m_iNextPtrOffset; DWORD m_dwHeadElement; DWORD m_dwTailElement; DWORD m_dwHeadBlock;};
// Free lists
extern CFreeList flFreeList16;extern CFreeList flFreeList32;extern CFreeList flHolderFreeList;extern CFreeList flRequestFreeList;
#endif // #ifndef __FREELIST_HXX__
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