235 lines
8.6 KiB
C++
235 lines
8.6 KiB
C++
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//+--------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1997
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//
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// File: pipes.hxx
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//
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//---------------------------------------------------------------------------
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#include <objidl.h>
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//+**************************************************************************
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// CPipePSFactory : public IPSFactoryBuffer
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//
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// Description: Class factory for creating pipe proxy and stub.
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//
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// History:
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// Date: Time: Developer: Action:
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// 11/11/97 11:16:05 AM RichN Created.
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//
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// Notes:
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//
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//-**************************************************************************
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class CPipePSFactory : public IPSFactoryBuffer
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{
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public:
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STDMETHOD(QueryInterface) (REFIID riid, LPVOID FAR* ppvObj);
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STDMETHOD_(ULONG,AddRef) ();
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STDMETHOD_(ULONG,Release) ();
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STDMETHOD(CreateProxy) ( IUnknown *pUnkOuter,
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REFIID riid,
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IRpcProxyBuffer **ppProxy,
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void **ppv );
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STDMETHOD(CreateStub) ( REFIID riid,
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IUnknown *pUnkServer,
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IRpcStubBuffer **ppStub );
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CPipePSFactory();
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virtual ~CPipePSFactory();
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private:
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LONG m_cRef;
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};
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//+**************************************************************************
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// CPipeProxyImp : public IRpcProxyBuffer
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//
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// Description: Actual implementation of the proxy since it is agragated
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// by the proxy manager. It holds a pointer to the real
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// pipe proxy which has a pointer to the real proxy.
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//
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// History:
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// Date: Time: Developer: Action:
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// 11/11/97 11:16:48 AM RichN Created.
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//
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// Notes: When the ref count goes to zero, delete the pipe proxy object which
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// will addref the outer unknown and then release the real
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// proxy. Next, release the IRpcProxyBuffer pointer and delete this.
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//
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//-**************************************************************************
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class CPipeProxyImp : public IRpcProxyBuffer
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{
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public:
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STDMETHOD(QueryInterface) (REFIID riid, LPVOID FAR* ppvObj);
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STDMETHOD_(ULONG,AddRef) ();
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STDMETHOD_(ULONG,Release) ();
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// Interface IRpcProxyBuffer
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STDMETHOD(Connect)(IRpcChannelBuffer *pRpcChannelBuffer);
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STDMETHOD_(void, Disconnect)( void);
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CPipeProxyImp(IUnknown *pUnkOuter,
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IRpcProxyBuffer *pInternalPB,
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IUnknown *pRealPipeProxy,
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IUnknown *pInternalPipeProxy,
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IID iid);
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virtual ~CPipeProxyImp();
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private:
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LONG m_cRef; // Reference count.
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IUnknown *m_pUnkOuter; // Outer unknown.
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IUnknown *m_pRealPipeProxy; // Pointer to real proxy.
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IUnknown *m_pInternalPipeProxy; // Pointer to internal proxy.
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IRpcProxyBuffer *m_pInternalPB; // pointer to real RPC Proxy Buffer.
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IID m_IidOfPipe; // iid of the pipe.
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};
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//+**************************************************************************
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// CPipeProxy : public I
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//
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// Description: The proxy that intercepts the pipe calls and does all
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// the read ahead and write behind.
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//
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// History:
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// Date: Time: Developer: Action:
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// 11/11/97 11:19:37 AM RichN Created.
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//
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// Notes:
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//
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//-**************************************************************************
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typedef enum PULLSTATE
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{
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PULLSTATE0_ENTRY = 0x00, // Default start.
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PULLSTATE1_FIRST_CALL, // Start, no saved data, no outstanding async call
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PULLSTATE2_NS_RQlsRA, // No saved, request < read ahead
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PULLSTATE3_NS_RQgeRA, // No saved, request >= read ahead
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PULLSTATE4_S_RQlsBS, // Have saved data, request < buffer size(saved data)
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PULLSTATE5_S_RQgeBS, // Have saved data, request >= buffer size
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PULLSTATE6_DONE // No saved, last data read was zero
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} PULLSTATE;
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const LONG MAX_PULL_STATES = PULLSTATE6_DONE + 1;
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typedef enum PUSHSTATE
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{
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PUSHSTATE0_ENTRY = 0x00, // Default start.
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PUSHSTATE1_FIRSTCALL, // First call to push. Create buffer in this state.
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PUSHSTATE2_FS_PSgeFS, // Free space > 0 and the push size is >= Free space.
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PUSHSTATE3_FS_PSltFS, // Free space > 0 and the push size is < Free space.
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PUSHSTATE4_FS_PSZERO, // Free space > 0 and push size is zero.
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PUSHSTATE5_DONE_ERROR // Done, really should never get here.
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} PUSHSTATE;
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const LONG MAX_PUSH_STATES = PUSHSTATE5_DONE_ERROR + 1;
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template<class T, const IID *ID, const IID *AsyncID, class I, class AsyncI>
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class CPipeProxy : public I,
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public CPrivAlloc
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{
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friend CPipeProxyImp;
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public:
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// IUnknown
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STDMETHOD(QueryInterface) (REFIID riid, LPVOID FAR* ppvObj);
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STDMETHOD_(ULONG,AddRef) ();
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STDMETHOD_(ULONG,Release) ();
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// IPipexxxx methods.
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STDMETHOD(Pull)( T *Buf, ULONG Request, ULONG *Received);
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STDMETHOD(Push)( T *Buf, ULONG count);
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CPipeProxy( IUnknown *pUnkOuter, void * pProxy );
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virtual ~CPipeProxy( void );
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private:
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HRESULT InitAsync(IUnknown** ppCallObj,
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AsyncI** ppAsyncPipe,
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ISynchronize** ppISync); // Create async interfaces.
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void CleanupProxy(T ** ppBuffer,
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IUnknown** ppCallObj,
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AsyncI** ppAsyncPipe,
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ISynchronize** ppISync); // Release async interfaces.
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void CancelTheCall(IUnknown *pCallObj, DWORD delay);
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// Implements the state machine for read ahead.
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// See constructor for brief explaination of the names.
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// Number at the end corresponds to the state number.
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HRESULT PullStateTransition(ULONG Request);
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HRESULT NbNaRgtRA1 (T *Buf, ULONG Request, ULONG *Received);
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HRESULT NbaRltRA2 (T *Buf, ULONG Request, ULONG *Received);
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HRESULT NbaRgtRA3 (T *Buf, ULONG Request, ULONG *Received);
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HRESULT baRltB4 (T *Buf, ULONG Request, ULONG *Received);
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HRESULT baRgtB5 (T *Buf, ULONG Request, ULONG *Received);
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HRESULT PullDone6 (T *Buf, ULONG Request, ULONG *Received);
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private:
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// Implements the state machine for write behind.
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// See constructor for brief explaination of the names.
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// Number at the end corresponds to the state number.
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HRESULT PushStateTransition(ULONG PushSize);
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HRESULT NbNf1 (T *Buf, ULONG PushSize);
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HRESULT bfPgtF2 (T *Buf, ULONG PushSize);
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HRESULT bfPltF3 (T *Buf, ULONG PushSize);
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HRESULT bPSz4 (T *Buf, ULONG PushSize);
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HRESULT PushDone5 (T *Buf, ULONG PushSize);
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private:
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// State for the entire object.
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IUnknown *m_pUnkOuter; // Outer unknown
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LONG m_cRef; // internal reference count.
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I *m_pRealProxy; // Pointer to real proxy.
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private:
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// Helper methods and state for Pull.
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void SetReadAhead (ULONG Request);
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HRESULT CheckAndSetKeepBuffer(void);
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IUnknown *m_pPullCallObj; // Call object.
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AsyncI *m_pAsyncPullPipe; // Ptr to async interface.
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ISynchronize *m_pISyncPull; // Ptr to the synchronize obj.
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PULLSTATE m_PullState; // Current pull state.
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ULONG m_cReadAhead; // Read ahead size in the async call.
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ULONG m_cLastRead; // Last amount read.
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ULONG m_cKeepBufferSize; // Size of the keep buffer.
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T *m_pKeepBuffer; // Where we store any data we keep around.
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ULONG m_cKeepDataSize; // Amount of data kept.
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T *m_pKeepData; // Pointer to the data in the buffer.
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private:
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// Helper methods and state for Push.
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HRESULT SetPushBuffer(ULONG PushSize);
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IUnknown *m_pPushCallObj; // Call object.
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AsyncI *m_pAsyncPushPipe; // Ptr to async interface.
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ISynchronize *m_pISyncPush; // Ptr to the synchronize obj.
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PUSHSTATE m_PushState; // Current push state.
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ULONG m_cPushBufferSize; // Size of the push buffer in elements.
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T *m_pPushBuffer; // Ptr to the buffer.
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ULONG m_cFreeSpace; // Unused space in push buffer.
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T *m_pFreeSpace; // Ptr to start of free space.
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// Arrays for holding the state methods.
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typedef HRESULT
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(CPipeProxy<T, ID, AsyncID, I, AsyncI>::*PPULLSTATEFUNC)
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(T *Buf, ULONG Request, ULONG *Received);
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PPULLSTATEFUNC PullStateFunc[MAX_PULL_STATES];
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typedef HRESULT
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(CPipeProxy<T, ID, AsyncID, I, AsyncI>::*PPUSHSTATEFUNC)
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(T *Buf, ULONG Count);
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PPUSHSTATEFUNC PushStateFunc[MAX_PUSH_STATES];
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};
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// Prototypes
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EXTERN_C HRESULT ProxyDllGetClassObject(REFCLSID clsid, REFIID iid, void **ppv);
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