mmapmgr.h
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上传日期:2007-06-06
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文件大小:7k
- /* ***** 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 _MMAPMGR_H_
- #define _MMAPMGR_H_
- #include "hxtypes.h"
- #include "hxcom.h"
- #include "hxbuffer.h"
- #include "hxslist.h"
- #include "hxengin.h"
- #include "hxcomm.h"
- #include "hxmap.h"
- struct IHXScheduler;
- struct IHXDescriptorRegistration;
- #define NUMBER_OF_REAP_BUCKETS 3
- #define MMAP_EXCEPTION 0xfffffff1
- #define MMAP_EOF_EXCEPTION 0xfffffff2
- #define NUM_PTES 128
- #if defined(_UNIX) || defined(_SYMBIAN)
- #define FILE_IDENTIFIER int
- #else
- #define FILE_IDENTIFIER HANDLE
- #endif
- #if defined _WIN32 || defined(HELIX_FEATURE_THREADSAFE_MEMMAP_IO)
- #define _MMM_NEED_MUTEX
- #endif
- class MMMCallback;
- class MemoryMapManager : public IUnknown
- {
- public:
- MemoryMapManager(IUnknown* pContext, BOOL bDisableMemoryMappedIO = 0,
- UINT32 ulChunkSize = 0);
- virtual ~MemoryMapManager();
- void* OpenMap(FILE_IDENTIFIER Descriptor, IUnknown* pContext);
- void CloseMap(void* pHandle);
- #ifdef _WIN32
- void AttemptCloseMapNow(void* pHandle);
- #endif
- void* GetMMHandle(FILE_IDENTIFIER Descriptor);
- UINT32 GetBlock(REF(IHXBuffer*) pBuffer, void* pHandle,
- UINT32 ulOffset, UINT32 ulSize);
- static void DestroyFileInfo(void* pHandle);
- STDMETHOD(QueryInterface) (THIS_
- REFIID riid,
- void** ppvObj);
- STDMETHOD_(ULONG32,AddRef) (THIS);
- STDMETHOD_(ULONG32,Release) (THIS);
- void ProcessIdle(void);
- MMMCallback* m_pMMMCallback;
- friend class MMMCallback;
- struct _FileInfo;
- struct _PageTableLevel1;
- struct _PageTableEntry
- {
- UINT32 ulPageRefCount;
- UINT32 ulSize;
- void* pPage;
- /* Page is active (i.e. this entry is valid) */
- unsigned char bActive : 1;
- /* Page should be reaped in CheckAndReapPageTableEntry() */
- unsigned char bReapMe : 1;
- /* Page is dead and will be reaped by refcount==0 */
- unsigned char bDeadPage : 1;
- UINT8 usReapListNumber : 8;
- LISTPOSITION ReapListPosition;
- struct _FileInfo* pInfo;
- struct _PageTableLevel1* pParent;
- #ifdef _WIN32
- _PageTableEntry* m_pNextPTE;
- _PageTableEntry* m_pPrevPTE;
- #endif
- };
- struct _PageTableLevel1
- {
- struct _PageTableEntry pEntry[NUM_PTES];
- UINT32 ulNumberOfPageTableEntriesInUse;
- struct _PageTableLevel1** pMyEntryInParentsPageTable;
- };
- #define FILEINFO_KEY_SIZE 32
- struct _FileInfo
- {
- FILE_IDENTIFIER Descriptor;
- UINT32 ulSize;
- UINT32 ulRefCount;
- UINT32 ulUseCount;
- char pKey[FILEINFO_KEY_SIZE]; /* Flawfinder: ignore */
- MemoryMapManager* pMgr;
- struct _PageTableLevel1* pPageTable[NUM_PTES];
- IHXDescriptorRegistration* pDescReg;
- #ifdef _WIN32
- _PageTableEntry* m_pPTEList;
- #endif
- };
- static BOOL CheckAndReapPageTableEntry(struct _PageTableEntry* pPTE);
- private:
- class Buffer : public IHXBuffer
- {
- public:
- FAST_CACHE_MEM
- Buffer(struct _PageTableEntry* pEntry, UCHAR* pData, ULONG32 ulLength);
- virtual ~Buffer();
- STDMETHOD(QueryInterface) (THIS_
- REFIID riid,
- void** ppvObj);
- STDMETHOD_(ULONG32,AddRef) (THIS);
- STDMETHOD_(ULONG32,Release) (THIS);
- STDMETHOD(Get) (THIS_
- REF(UCHAR*) pData,
- REF(ULONG32) ulLength);
- STDMETHOD(Set) (THIS_
- const UCHAR* pData,
- ULONG32 ulLength);
- STDMETHOD(SetSize) (THIS_
- ULONG32 ulLength);
- STDMETHOD_(ULONG32,GetSize) (THIS);
- STDMETHOD_(UCHAR*,GetBuffer)(THIS);
- private:
- LONG32 m_lRefCount;
- ULONG32 m_ulLength;
- UCHAR* m_pData;
- #ifdef _WINDOWS
- _PageTableEntry* m_pPTE;
- #else
- class MemoryMapManager::_PageTableEntry* m_pPTE;
- #endif
- };
- void EmptyReapBuckets();
- CHXSimpleList ReapBuckets[NUMBER_OF_REAP_BUCKETS];
- CHXMapStringToOb* m_pDevINodeToFileInfoMap;
- UINT8 m_ulActiveReapList;
- IHXScheduler* m_pScheduler;
- UINT32 m_ulChunkSize;
- INT32 m_lRefCount;
- CallbackHandle m_PendingHandle;
- /*
- * Buffer needs to call back into here
- * on delete.
- */
- friend class MemoryMapManager::Buffer;
- void LockMutex();
- void UnlockMutex();
- #ifdef _MMM_NEED_MUTEX
- IHXMutex* m_pMutex;
- #ifdef _DEBUG
- BOOL m_bHaveMutex;
- #endif
- #endif
- IHXFastAlloc* m_pFastAlloc;
- BOOL m_bDisableMemoryMappedIO;
- };
- class MMMCallback : public IHXCallback
- {
- public:
-
- MemoryMapManager* m_pMMM;
- CallbackHandle m_hPendingHandle;
- MMMCallback(MemoryMapManager* pMMM);
- ~MMMCallback();
- /*
- * IUnknown methods
- */
- STDMETHOD(QueryInterface) (THIS_
- REFIID riid,
- void** ppvObj);
- STDMETHOD_(ULONG32,AddRef) (THIS);
- STDMETHOD_(ULONG32,Release) (THIS);
- /*
- * IHXCallback methods
- */
- STDMETHOD(Func) (THIS);
- protected:
- LONG32 m_lRefCount;
- };
- #ifdef _MMM_NEED_MUTEX
- /*
- * If you are in here your os has one mmapmgr for the whole
- * server.
- */
- inline void
- MemoryMapManager::LockMutex()
- {
- AddRef();
- if (m_pMutex)
- {
- m_pMutex->Lock();
- }
- #ifdef _DEBUG
- m_bHaveMutex = TRUE;
- #endif
- }
- inline void
- MemoryMapManager::UnlockMutex()
- {
- #ifdef _DEBUG
- m_bHaveMutex = FALSE;
- #endif
- if (m_pMutex)
- {
- m_pMutex->Unlock();
- }
- Release();
- }
- #else
- /*
- * If you are in here then each server process has its
- * own mmapmgr.
- */
- inline void
- MemoryMapManager::LockMutex()
- {
- }
- inline void
- MemoryMapManager::UnlockMutex()
- {
- }
- #endif
- #endif /* _MMAPMGR_H_ */