mempager.h
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上传日期:2013-07-19
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef _MEMPAGER_H_
- #define _MEMPAGER_H_
- /****************************************************************************
- * Defines
- */
- #ifdef QTCONFIG_SPEED_OVER_SIZE
- #define QTMEMPAGER_INLINE inline
- #else // QTCONFIG_SPEED_OVER_SIZE
- #define QTMEMPAGER_INLINE /**/
- #endif // QTCONFIG_SPEED_OVER_SIZE
- /****************************************************************************
- * Includes
- */
- #include "hxtypes.h"
- #include "hxcom.h"
- #include "hxcomm.h"
- #include "hxfiles.h"
- #include "ihxpckts.h"
- typedef _INTERFACE IHXFileSwitcher IHXFileSwitcher;
- /****************************************************************************
- *
- * Class:
- * CMemPager
- *
- * Purpose:
- * Enables paging of file sections into memory
- *
- */
- class CMemPager : public IHXFileResponse,
- public IHXThreadSafeMethods
- {
- public:
- /*
- * Constructor/Destructor
- */
- CMemPager(void);
- /*
- * IUnknown methods
- */
- STDMETHOD(QueryInterface) (THIS_
- REFIID riid,
- void** ppvObj);
- STDMETHOD_(ULONG32,AddRef) (THIS);
- STDMETHOD_(ULONG32,Release) (THIS);
- /*
- * MemPager methods
- */
- HX_RESULT Init (IUnknown* pSource,
- ULONG32 ulOffset,
- ULONG32 ulSize,
- UINT8** ppBaseVirtualAddr = NULL);
- UINT8* GetBaseVirtualAddr(void)
- {
- return m_pBaseVirtualAddr;
- }
- BOOL IsFaulted(void)
- {
- return (m_ulFaultedPageSize != 0);
- }
- BOOL IsPageIn (UINT8* pVirtualAddr,
- ULONG32 ulSize)
- {
- return ((pVirtualAddr >= m_pPageVirtualAddr) &&
- ((m_pPageVirtualAddr + m_ulPageSize) >= (pVirtualAddr + ulSize)));
- }
- BOOL IsPageAdressable (UINT8* pVirtualAddr,
- ULONG32 ulSize)
- {
- return ((pVirtualAddr >= m_pBaseVirtualAddr) &&
- ((m_pBaseVirtualAddr + m_ulAddrSpaceSize) >= (pVirtualAddr + ulSize)));
- }
- QTMEMPAGER_INLINE HX_RESULT PageIn(UINT8* pVirtualAddr,
- ULONG32 ulSize,
- UINT8* &pPhysicalBaseAddr);
- QTMEMPAGER_INLINE HX_RESULT LoadPage(IHXFileResponse* pResponse);
- /*
- * IHXFileResponse methods
- */
- STDMETHOD(InitDone) (THIS_
- HX_RESULT status);
- STDMETHOD(CloseDone) (THIS_
- HX_RESULT status);
- STDMETHOD(ReadDone) (THIS_
- HX_RESULT status,
- IHXBuffer* pBuffer);
- STDMETHOD(WriteDone) (THIS_
- HX_RESULT status);
- STDMETHOD(SeekDone) (THIS_
- HX_RESULT status);
- /*
- * IHXThreadSafeMethods method
- */
- STDMETHOD_(UINT32,IsThreadSafe) (THIS);
- private:
- typedef enum
- {
- MEMPGR_Offline,
- MEMPGR_Ready,
- MEMPGR_ProcLoad
- } MemPagerState;
- void Reset(void);
- HX_RESULT _PageIn(UINT8* pVirtualAddr,
- ULONG32 ulSize,
- UINT8* &pPhysicalBaseAddr);
- inline void ReleasePage(void);
- HX_RESULT _LoadPage(void);
- inline HX_RESULT HandleResponse(HX_RESULT status,
- IHXBuffer* pBuffer = NULL);
- IHXFileSwitcher* m_pFileSwitcher;
- IHXFileResponse* m_pResponse;
- MemPagerState m_State;
- UINT8* m_pPageVirtualAddr;
- UINT8* m_pPagePhysicalAddr;
- ULONG32 m_ulPageSize;
- UINT8* m_pFaultedPageVirtualAddr;
- ULONG32 m_ulFaultedPageSize;
- ULONG32 m_ulAddrSpaceOffset;
- ULONG32 m_ulAddrSpaceSize;
- ULONG32 m_ulMinPageSize;
- UINT8* m_pBaseVirtualAddr;
- BOOL m_bSyncMode;
- IHXBuffer* m_pPageBuffer;
- LONG32 m_lRefCount;
- ~CMemPager();
- PRIVATE_DESTRUCTORS_ARE_NOT_A_CRIME
- };
- #ifdef QTCONFIG_SPEED_OVER_SIZE
- #include "mempager_inline.h"
- #endif // QTCONFIG_SPEED_OVER_SIZE
- #endif // _MEMPAGER_H_