130 lines
4.2 KiB
C
130 lines
4.2 KiB
C
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// RSIMP.H: Definition of CITResultSet
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#ifndef __RSIMP_H__
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#define __RSIMP_H__
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#include "verinfo.h"
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class CHeader
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{
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public:
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PROPID dwPropID;
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DWORD dwType;
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union
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{
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LPVOID lpvData;
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DWORD dwValue;
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};
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PRIORITY Priority;
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LPVOID lpvHeap;
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PFNCOLHEAPFREE pfnHeapFree;
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};
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// Implemenation of IITResultSet
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class CITResultSet:
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public IITResultSet,
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public CComObjectRootEx<CComMultiThreadModel>,
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public CComCoClass<CITResultSet, &CLSID_IITResultSet>
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{
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BEGIN_COM_MAP(CITResultSet)
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COM_INTERFACE_ENTRY(IITResultSet)
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END_COM_MAP()
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DECLARE_REGISTRY(CLSID_IITResultSet, "ITIR.ResultSet.4",
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"ITIR.ResultSet", 0, THREADFLAGS_BOTH)
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public:
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CITResultSet();
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~CITResultSet();
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public:
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// Initialization
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STDMETHOD(SetColumnPriority)(LONG lColumnIndex, PRIORITY ColumnPriority);
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STDMETHOD(SetColumnHeap)(LONG lColumnIndex, LPVOID lpvHeap,
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PFNCOLHEAPFREE pfnColHeapFree);
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inline STDMETHOD(SetKeyProp)(PROPID KeyPropID);
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STDMETHOD(Add)(LPVOID lpvHdr);
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STDMETHOD(Add)(PROPID PropID, LPVOID lpvDefaultData, DWORD cbData, PRIORITY Priority);
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STDMETHOD(Add)(PROPID PropID, LPCWSTR lpszwDefault, PRIORITY Priority);
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STDMETHOD(Add)(PROPID PropID, DWORD dwDefaultData, PRIORITY Priority);
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// Build result set
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STDMETHOD(Append)(LPVOID lpvHdr, LPVOID lpvData);
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STDMETHOD(Set)(LONG lRowIndex, LPVOID lpvHdr, LPVOID lpvData);
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STDMETHOD(Set)(LONG lRowIndex, LONG lColumnIndex, DWORD dwData);
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STDMETHOD(Set)(LONG lRowIndex, LONG lColumnIndex, LPCWSTR lpwStr);
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STDMETHOD(Set)(LONG lRowIndex, LONG lColumnIndex, LPVOID lpvData, DWORD cbData);
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STDMETHOD(Set)(LONG lRowIndex, LONG lColumnIndex, DWORD_PTR dwData);
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STDMETHOD(Copy)(IITResultSet* pRSCopy);
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STDMETHOD(AppendRows)(IITResultSet* pResSrc, LONG lRowSrcFirst, LONG cSrcRows,
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LONG& lRowFirstDest);
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// Obtain info about result set
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STDMETHOD(Get)(LONG lRowIndex, LONG lColumnIndex, CProperty& Prop);
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inline STDMETHOD(GetKeyProp)(DWORD& KeyPropID);
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STDMETHOD(GetColumnPriority)(LONG lColumnIndex, PRIORITY& ColumnPriority);
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inline STDMETHOD(GetColumnCount)(LONG& lNumberOfColumns);
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inline STDMETHOD(GetRowCount)(LONG& lNumberOfRows);
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STDMETHOD(GetColumn)(LONG lColumnIndex, PROPID& PropID);
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STDMETHOD(GetColumn)(LONG lColumnIndex, PROPID& PropID, DWORD& dwType, LPVOID& lpvDefaultValue,
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DWORD& cbSize, PRIORITY& ColumnPriority);
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STDMETHOD(GetColumnFromPropID)(PROPID PropID, LONG& lColumnIndex);
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// Clear result set
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STDMETHOD(Clear)();
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STDMETHOD(ClearRows)();
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STDMETHOD(Free)();
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// Asynchronous support
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STDMETHOD(IsCompleted)(); // returns S_OK or S_FALSE
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STDMETHOD(Cancel)();
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STDMETHOD(Pause)(BOOL fPause);
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STDMETHOD(GetRowStatus)(LONG lRowFirst, LONG cRows, LPROWSTATUS lpRowStatus);
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STDMETHOD(GetColumnStatus)(LPCOLUMNSTATUS lpColStatus);
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// STDMETHOD(Merge)();
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// Private methods and data
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private:
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// Methods for memory management
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HRESULT WINAPI Reserve();
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HRESULT WINAPI Commit(LONG RowNum);
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HRESULT WINAPI FreeMem();
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// Data
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LONG m_cProp; // Number of properties (column count)
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DWORD m_dwKeyProp; // Key property
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CHeader m_Header[MAX_COLUMNS]; // Result set header
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HANDLE m_hResultSet; // Handle to result set
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DWORD_PTR** m_ResultSet; // Result set data - an array of pointers to chunks
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// of rows
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LONG m_Chunk; // Keeps track of which chunk we need to access
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LONG m_NumChunks; // Number of chunks accessible via m_ResultSet
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LONG m_AppendRow; // Next row for appending
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// data to keep calculations to a minimum
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BOOL m_fInit; // Have we calculated numbers and allocated page map yet?
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LONG m_BytesReserved; // Number of bytes reserved at a time
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LONG m_RowsPerPage; // Number of rows in a page of memory
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LONG m_NumberOfPages; // Number of pages in a result set chunk
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BOOL* m_PageMap; // Keeps track of which pages have been allocated (per chunk)
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LONG m_RowsReserved; // Total number of rows that have been reserved
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_ThreadModel::AutoCriticalSection m_cs; // Critical section obj.
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LPVOID m_pMemPool; // Memory pool for data
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};
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#endif
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