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228 lines
8.8 KiB
228 lines
8.8 KiB
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1994.
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//
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// File: memstm.h
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//
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// Contents: memstm.h from OLE2
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//
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// History: 11-Apr-94 DrewB Copied from OLE2
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//
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//----------------------------------------------------------------------------
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#if !defined( _MEMSTM_H_ )
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#define _MEMSTM_H_
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// These defines shorten the class name so that the compiler doesn't
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// choke on really long decorated names for MarshalInterface
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#define CMarshalMemStm CMMS
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#define CMarshalMemBytes CMMB
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class FAR CMarshalMemStm;
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class FAR CMarshalMemBytes;
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// CMemStm is a stream implementation on top of global shared memory MEMSTM
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//
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// CMemStm
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// +---------+
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// + pvtf + Shared memory
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// +---------+ +--------------+
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// + m_pMem +-->|cb |
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// +---------+ |cRef |
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// |hGlobal |--->+--------------+
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// +--------------+ | Actual Data |
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// CMemStm MEMSTM +--------------+
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//
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struct MEMSTM { // Data in shared memory
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DWORD cb; // Size of hGlobal
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DWORD cRef; // See below
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HANDLE hGlobal; // The data
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BOOL fDeleteOnRelease;
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};
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// cRef counts all CMemStm pointers to this MEMSTM plus the number of times
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// a hMem handle to MEMSTM had been returned
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//
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#define STREAM_SIG (0x4d525453L)
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class FAR CMemStm : public IStream { // Shared emmory stream
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public:
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OLEMETHOD(QueryInterface) (REFIID iidInterface, void FAR* FAR* ppvObj);
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OLEMETHOD_(ULONG,AddRef) (void);
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OLEMETHOD_(ULONG,Release) (void);
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OLEMETHOD(Read) (VOID HUGEP* pv, ULONG cb, ULONG FAR* pcbRead);
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OLEMETHOD(Write) (VOID const HUGEP* pv, ULONG cb, ULONG FAR* pcbWritten);
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OLEMETHOD(Seek) (LARGE_INTEGER dlibMove,
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DWORD dwOrigin, ULARGE_INTEGER FAR* plibNewPosition);
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OLEMETHOD(SetSize) (ULARGE_INTEGER cb);
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OLEMETHOD(CopyTo) (IStream FAR* pstm,
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ULARGE_INTEGER cb, ULARGE_INTEGER FAR* pcbRead, ULARGE_INTEGER FAR* pcbWritten);
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OLEMETHOD(Commit) (DWORD grfCommitFlags);
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OLEMETHOD(Revert) (void);
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OLEMETHOD(LockRegion) (ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
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OLEMETHOD(UnlockRegion) (ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
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OLEMETHOD(Stat) (STATSTG FAR* pstatstg, DWORD statflag);
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OLEMETHOD(Clone)(IStream FAR * FAR *ppstm);
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OLESTATIC_(CMemStm FAR*) Create(HANDLE hMem);
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ctor_dtor:
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CMemStm() { GET_A5(); m_hMem = NULL; m_pData = NULL; m_pos = 0; m_refs = 0; }
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~CMemStm() {}
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private:
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DWORD m_dwSig; // Signature indicating this is our
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// implementation of IStream: STREAM_SIG
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ULONG m_refs; // Number of references to this CmemStm
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ULONG m_pos; // Seek pointer for Read/Write
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HANDLE m_hMem; // Memory Handle passed on creation
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MEMSTM FAR* m_pData; // Pointer to that memroy
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friend HRESULT STDAPICALLTYPE GetHGlobalFromStream (LPSTREAM, HGLOBAL FAR*);
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friend LPSTREAM STDAPICALLTYPE CreateMemStm (DWORD, LPHANDLE);
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friend class CMarshalMemStm;
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SET_A5;
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};
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// CMemBytes is an ILockBytes implementation on top of global shared
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// memory MEMSTM
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//
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// CMemBytes
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// +---------+
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// + pvtf + Shared memory
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// +---------+ +--------------+
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// + m_pData +-->| cb |
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// +---------+ | cRef |
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// | hGlobal |--->+-------------+
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// +--------------+ | Actual data |
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// CMemBytes MEMSTM +-------------+
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//
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#define LOCKBYTE_SIG (0x0046574A)
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// cRef counts all CMemBytes pointers to this MEMSTM.
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// It and fDeleteOnRelease control the GlobalFree'ing of the hGlobal.
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class FAR CMemBytes : public ILockBytes { // Shared memory lock bytes
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public:
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OLEMETHOD(QueryInterface) (REFIID iidInterface, void FAR* FAR* ppvObj);
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OLEMETHOD_(ULONG,AddRef) (void);
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OLEMETHOD_(ULONG,Release) (void);
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OLEMETHOD(ReadAt) (ULARGE_INTEGER ulOffset, VOID HUGEP *pv, ULONG cb,
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ULONG FAR *pcbRead);
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OLEMETHOD(WriteAt) (ULARGE_INTEGER ulOffset, VOID const HUGEP *pv, ULONG cb,
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ULONG FAR *pcbWritten);
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OLEMETHOD(Flush) (void);
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OLEMETHOD(SetSize) (ULARGE_INTEGER cb);
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OLEMETHOD(LockRegion) (ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
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OLEMETHOD(UnlockRegion) (ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
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OLEMETHOD(Stat) (THIS_ STATSTG FAR *pstatstg, DWORD statflag);
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OLESTATIC_(CMemBytes FAR*) Create(HANDLE hMem);
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ctor_dtor:
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CMemBytes() { GET_A5(); m_hMem = NULL; m_pData = NULL; m_refs = 0; }
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~CMemBytes() {}
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private:
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DWORD m_dwSig; // Signature indicating this is our
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// implementation of ILockBytes: LOCKBYTE_SIG
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ULONG m_refs; // Normal reference count
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HANDLE m_hMem; // Handle for bookeeping info (MEMSTM)
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MEMSTM FAR* m_pData; // Pointer to that memroy
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friend HRESULT STDAPICALLTYPE GetHGlobalFromILockBytes (LPLOCKBYTES, HGLOBAL FAR*);
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friend class CMarshalMemBytes;
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SET_A5;
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};
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// CMarshalMemStm can Marshal, Unmarshal CMemStm. It is impletented as
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// a seperate object accessible from CMemStm, CMemBytes: QueryIntreface of
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// IMarshal on CMemStm's IStream will return an IMarshal pointer to
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// CMarshalMemStm, but QueryInterface of IStream on that IMarshal will
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// fail.
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// Also QueryInterface of IUnknown on IMarshal will not return the same value
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// As QueryInterface of IUnkown on the original IStream.
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//
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class FAR CMarshalMemStm : public IMarshal {
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public:
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OLEMETHOD(QueryInterface) (REFIID riid, LPVOID FAR* ppvObj);
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OLEMETHOD_(ULONG,AddRef) (void);
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OLEMETHOD_(ULONG,Release) (void);
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OLEMETHOD(GetUnmarshalClass)(THIS_ REFIID riid, LPVOID pv,
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DWORD dwDestContext, LPVOID pvDestContext,
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DWORD mshlflags, LPCLSID pCid);
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OLEMETHOD(GetMarshalSizeMax)(THIS_ REFIID riid, LPVOID pv,
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DWORD dwDestContext, LPVOID pvDestContext,
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DWORD mshlflags, LPDWORD pSize);
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OLEMETHOD(MarshalInterface)(THIS_ IStream FAR* pStm, REFIID riid,
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LPVOID pv, DWORD dwDestContext, LPVOID pvDestContext,
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DWORD mshlflags);
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OLEMETHOD(UnmarshalInterface)(THIS_ IStream FAR* pStm, REFIID riid,
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LPVOID FAR* ppv);
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OLEMETHOD(ReleaseMarshalData)(THIS_ IStream FAR* pStm);
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OLEMETHOD(DisconnectObject)(THIS_ DWORD dwReserved);
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OLESTATIC_(CMarshalMemStm FAR*) Create(CMemStm FAR* pMemStm);
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ctor_dtor:
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CMarshalMemStm() { GET_A5();m_pMemStm = NULL; m_refs = 0; }
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~CMarshalMemStm() {}
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private:
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ULONG m_refs; // Number of references to this CmemStm
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CMemStm FAR* m_pMemStm; // Pointer to object [Un]Marshalled
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CLSID m_clsid; // Class of object pointed by pUnk
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SET_A5;
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};
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// CMarshalMemBytes can Marshal, Unmarshal CMemBytes. It is impletented as
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// a seperate object accessible from CMemBytes, CMemBytes: QueryIntreface of
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// IMarshal on CMemBytes's ILocBytes will return an IMarshal pointer to
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// CMarshalMemBytes, but QueryInterface of ILockBytes on that IMarshal will
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// fail.
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// Also QueryInterface of IUnknown on IMarshal will not return the same value
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// As QueryInterface of IUnkown on the original ILockBytes.
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//
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class FAR CMarshalMemBytes : public IMarshal {
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public:
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OLEMETHOD(QueryInterface) (REFIID riid, LPVOID FAR* ppvObj);
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OLEMETHOD_(ULONG,AddRef) (void);
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OLEMETHOD_(ULONG,Release) (void);
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OLEMETHOD(GetUnmarshalClass)(THIS_ REFIID riid, LPVOID pv,
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DWORD dwDestContext, LPVOID pvDestContext,
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DWORD mshlflags, LPCLSID pCid);
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OLEMETHOD(GetMarshalSizeMax)(THIS_ REFIID riid, LPVOID pv,
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DWORD dwDestContext, LPVOID pvDestContext,
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DWORD mshlflags, LPDWORD pSize);
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OLEMETHOD(MarshalInterface)(THIS_ IStream FAR* pStm, REFIID riid,
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LPVOID pv, DWORD dwDestContext, LPVOID pvDestContext,
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DWORD mshlflags);
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OLEMETHOD(UnmarshalInterface)(THIS_ IStream FAR* pStm, REFIID riid,
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LPVOID FAR* ppv);
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OLEMETHOD(ReleaseMarshalData)(THIS_ IStream FAR* pStm);
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OLEMETHOD(DisconnectObject)(THIS_ DWORD dwReserved);
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OLESTATIC_(CMarshalMemBytes FAR*) Create(CMemBytes FAR* pMemBytes);
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ctor_dtor:
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CMarshalMemBytes() { GET_A5();m_pMemBytes = NULL; m_refs = 0; }
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~CMarshalMemBytes() {}
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private:
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ULONG m_refs; // Number of references to this CMemBytes
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CMemBytes FAR* m_pMemBytes; // Pointer to object [Un]Marshalled
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CLSID m_clsid; // Class of object pointed by pUnk
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SET_A5;
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};
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#endif // _MemBytes_H
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