130 lines
5.7 KiB
C++
130 lines
5.7 KiB
C++
// --------------------------------------------------------------------------------
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// Stmlock.h
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// Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
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// Steven J. Bailey
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// --------------------------------------------------------------------------------
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#ifndef __STMLOCK_H
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#define __STMLOCK_H
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// -----------------------------------------------------------------------------
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// IID_CStreamLockBytes - {62A83701-52A2-11d0-8205-00C04FD85AB4}
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// -----------------------------------------------------------------------------
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DEFINE_GUID(IID_CStreamLockBytes, 0x62a83701, 0x52a2, 0x11d0, 0x82, 0x5, 0x0, 0xc0, 0x4f, 0xd8, 0x5a, 0xb4);
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// -----------------------------------------------------------------------------
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// CStreamLockBytes
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// -----------------------------------------------------------------------------
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class CStreamLockBytes : public ILockBytes
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{
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public:
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// -------------------------------------------------------------------------
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// Construction
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// -------------------------------------------------------------------------
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CStreamLockBytes(IStream *pStream);
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~CStreamLockBytes(void);
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// -------------------------------------------------------------------------
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// IUnknown
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// -------------------------------------------------------------------------
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STDMETHODIMP QueryInterface(REFIID, LPVOID *);
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STDMETHODIMP_(ULONG) AddRef(void);
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STDMETHODIMP_(ULONG) Release(void);
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// -------------------------------------------------------------------------
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// ILockBytes methods
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// -------------------------------------------------------------------------
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STDMETHODIMP Flush(void);
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STDMETHODIMP LockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
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#ifndef WIN16
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STDMETHODIMP ReadAt(ULARGE_INTEGER ulOffset, void *pv, ULONG cb, ULONG *pcbRead);
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#else
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STDMETHODIMP ReadAt(ULARGE_INTEGER ulOffset, void HUGEP *pv, ULONG cb, ULONG *pcbRead);
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#endif // !WIN16
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STDMETHODIMP SetSize(ULARGE_INTEGER cb);
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STDMETHODIMP Stat(STATSTG *pstatstg, DWORD grfStatFlag);
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STDMETHODIMP UnlockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
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#ifndef WIN16
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STDMETHODIMP WriteAt(ULARGE_INTEGER ulOffset, void const *pv, ULONG cb, ULONG *pcbWritten);
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#else
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STDMETHODIMP WriteAt(ULARGE_INTEGER ulOffset, void const HUGEP *pv, ULONG cb, ULONG *pcbWritten);
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#endif // !WIN16
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// -------------------------------------------------------------------------
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// CStreamLockBytes
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// -------------------------------------------------------------------------
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void ReplaceInternalStream(IStream *pStream);
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HRESULT HrHandsOffStorage(void);
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HRESULT HrSetPosition(ULARGE_INTEGER uliOffset);
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void GetCurrentStream(IStream **ppStream);
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private:
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// -------------------------------------------------------------------------
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// Private Data
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// -------------------------------------------------------------------------
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LONG m_cRef; // Ref count
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IStream *m_pStream; // Protected stream
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CRITICAL_SECTION m_cs; // Critical Section for m_pStream
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};
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// -----------------------------------------------------------------------------
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// CLockedStream
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// -----------------------------------------------------------------------------
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class CLockedStream : public IStream
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{
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public:
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// -------------------------------------------------------------------------
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// Construction
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// -------------------------------------------------------------------------
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CLockedStream(ILockBytes *pLockBytes, ULONG cbSize);
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~CLockedStream(void);
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// -------------------------------------------------------------------------
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// IUnknown
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// -------------------------------------------------------------------------
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STDMETHODIMP QueryInterface(REFIID, LPVOID *);
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STDMETHODIMP_(ULONG) AddRef(void);
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STDMETHODIMP_(ULONG) Release(void);
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// -------------------------------------------------------------------------
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// IStream
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// -------------------------------------------------------------------------
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#ifndef WIN16
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STDMETHODIMP Read(LPVOID, ULONG, ULONG *);
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#else
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STDMETHODIMP Read(VOID HUGEP *, ULONG, ULONG *);
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#endif // !WIN16
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STDMETHODIMP Seek(LARGE_INTEGER, DWORD, ULARGE_INTEGER *);
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STDMETHODIMP Stat(STATSTG *, DWORD);
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#ifndef WIN16
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STDMETHODIMP Write(const void *, ULONG, ULONG *) {
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#else
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STDMETHODIMP Write(const void HUGEP *, ULONG, ULONG *) {
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#endif // !WIN16
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return TrapError(STG_E_ACCESSDENIED); }
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STDMETHODIMP SetSize(ULARGE_INTEGER) {
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return E_NOTIMPL; }
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STDMETHODIMP CopyTo(LPSTREAM, ULARGE_INTEGER, ULARGE_INTEGER *, ULARGE_INTEGER *);
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STDMETHODIMP Commit(DWORD) {
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return E_NOTIMPL; }
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STDMETHODIMP Revert(void) {
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return E_NOTIMPL; }
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STDMETHODIMP LockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD) {
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return E_NOTIMPL; }
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STDMETHODIMP UnlockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD) {
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return E_NOTIMPL; }
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STDMETHODIMP Clone(LPSTREAM *) {
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return E_NOTIMPL; }
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private:
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// -------------------------------------------------------------------------
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// Private Data
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// -------------------------------------------------------------------------
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LONG m_cRef; // Reference count
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ILockBytes *m_pLockBytes; // Protected data stream
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ULARGE_INTEGER m_uliOffset; // 64bit Addressable internal lockbyte space
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ULARGE_INTEGER m_uliSize; // Size of internal lockbytes
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CRITICAL_SECTION m_cs; // Critical Section for m_pStream
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};
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#endif // __STMLOCK_H
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