90 lines
4.2 KiB
C++
90 lines
4.2 KiB
C++
// --------------------------------------------------------------------------------
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// Ibdylock.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 __IBDYLOCK_H
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#define __IBDYLOCK_H
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// --------------------------------------------------------------------------------
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// Forward Decls
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// --------------------------------------------------------------------------------
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typedef struct tagTREENODEINFO *LPTREENODEINFO;
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typedef enum tagBINDNODESTATE BINDNODESTATE;
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// --------------------------------------------------------------------------------
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// CBodyLockBytes - {62A83703-52A2-11d0-8205-00C04FD85AB4}
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// --------------------------------------------------------------------------------
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DEFINE_GUID(IID_CBodyLockBytes, 0x62a83703, 0x52a2, 0x11d0, 0x82, 0x5, 0x0, 0xc0, 0x4f, 0xd8, 0x5a, 0xb4);
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// --------------------------------------------------------------------------------
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// BODYLOCK_xxx States
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// --------------------------------------------------------------------------------
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#define BODYLOCK_HANDSONSTORAGE FLAG01
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// -----------------------------------------------------------------------------
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// Wraps a MIME stream object, and provides thread safe access to the
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// a shared stream. When this object wraps a message stream, it is owned by
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// IMimeBody
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// -----------------------------------------------------------------------------
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class CBodyLockBytes : 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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CBodyLockBytes(ILockBytes *pLockBytes, LPTREENODEINFO pNode);
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~CBodyLockBytes(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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#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 Stat(STATSTG *, DWORD);
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STDMETHODIMP SetSize(ULARGE_INTEGER cb) {
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return E_NOTIMPL; }
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STDMETHODIMP Flush(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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#ifndef WIN16
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STDMETHODIMP WriteAt(ULARGE_INTEGER, void const *, ULONG, ULONG *) {
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#else
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STDMETHODIMP WriteAt(ULARGE_INTEGER, void const HUGEP *, ULONG, ULONG *) {
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#endif // !WIN16
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return TrapError(STG_E_ACCESSDENIED); }
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// -------------------------------------------------------------------------
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// CMimeLockBytes methods
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// -------------------------------------------------------------------------
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HRESULT HrHandsOffStorage(void);
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void OnDataAvailable(LPTREENODEINFO pNode);
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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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DWORD m_dwState; // State
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BINDNODESTATE m_bindstate; // Current bind state
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ULARGE_INTEGER m_uliBodyStart; // Offset to start of body in m_pLockBytes
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ULARGE_INTEGER m_uliBodyEnd; // Offset to end of body in m_pLockBytes
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ILockBytes *m_pLockBytes; // Actual lockbytes implementation (CMimeMessageTree or CStreamLockBytes)
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CRITICAL_SECTION m_cs; // Critical Section for m_pStream
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};
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#endif // __IBDYLOCK_H
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