97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
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#ifndef __A51_HEAP__H_
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#define __A51_HEAP__H_
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#include <lock.h>
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#include <absfile.h>
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typedef DWORD TOffset;
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#define ROSWELL_INVALID_OFFSET -1
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struct CRecordInfo
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{
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DWORD m_dwIndex;
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TOffset m_nOffset;
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CRecordInfo(DWORD dwIndex, TOffset nOffset)
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: m_dwIndex(dwIndex), m_nOffset(nOffset)
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{}
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};
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class CFileHeap
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{
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public:
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CFileHeap()
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: m_bInit(FALSE),
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// m_hTimerQueue(NULL), m_hTrimRequest(NULL),
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m_pMainFile(NULL), m_pFreeFile(NULL)
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{}
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virtual ~CFileHeap();
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long Initialize(CAbstractFileSource* pSource,
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LPCWSTR wszFileNameBase);
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long Uninitialize();
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long Allocate(DWORD dwLength, TOffset* pnOffset);
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long FreeAllocation(TOffset nOffset, DWORD dwLength);
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long ReadBytes(TOffset nOffset, BYTE* pBuffer, DWORD dwLength);
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long WriteBytes(TOffset nOffset, BYTE* pBuffer, DWORD dwLength);
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long InvalidateCache();
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public:
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DWORD GetFileLength();
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long FindNextFree(TOffset nCurrentOffset, TOffset* pnNextFreeOffset,
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DWORD* pdwNextFreeLength);
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protected:
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BOOL m_bInit;
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CCritSec m_cs;
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CAbstractFile* m_pMainFile;
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CAbstractFile* m_pFreeFile;
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public:
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typedef std::multimap<DWORD, CRecordInfo> TFreeMap;
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typedef TFreeMap::iterator TFreeIterator;
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typedef TFreeMap::value_type TFreeValue;
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typedef std::map<TOffset, DWORD> TFreeOffsetMap;
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typedef TFreeOffsetMap::iterator TFreeOffsetIterator;
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typedef TFreeOffsetMap::value_type TFreeOffsetValue;
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// for the dump utility
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TFreeOffsetMap& GetFreeOffsetMap() {return m_mapFreeOffset;}
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protected:
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TFreeMap m_mapFree;
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TFreeOffsetMap m_mapFreeOffset;
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// HANDLE m_hTimerQueue;
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// HANDLE m_hTrimRequest;
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protected:
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DWORD GetFreeListRecordSize();
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TFreeOffsetIterator GetOffsetIteratorFromFree(TFreeIterator itFree);
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TFreeIterator GetFreeIteratorFromOffset(TFreeOffsetIterator itOffset);
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long InsertFreeBlock(TOffset nOffset, DWORD dwLength);
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long EraseFreeBlockByFreeIt(TFreeIterator itFree);
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long EraseFreeBlockByOffsetIt(TFreeOffsetIterator itFreeOffset);
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long EraseFreeBlock(TFreeIterator itFree, TFreeOffsetIterator itOffset);
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long ReplaceFreeBlockByFreeIt(TFreeIterator itFree, TOffset nOffset,
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DWORD dwSize);
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long ReplaceFreeBlockByOffsetIt(TFreeOffsetIterator itFreeOffset,
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TOffset nOffset, DWORD dwSize);
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long ReplaceFreeBlock(TFreeIterator itFree, TFreeOffsetIterator itOffset,
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TOffset nOffset, DWORD dwSize);
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long WriteAllocationRecordToDisk(const CRecordInfo& Info, DWORD dwSize);
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long WriteToFreeFile(TOffset nOffset, BYTE* pBuffer, DWORD dwLength);
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long ReadFromFreeFile(TOffset nOffset, BYTE* pBuffer, DWORD dwLength);
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long ReadFreeList();
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};
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#endif
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