159 lines
4.3 KiB
C++
159 lines
4.3 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 - 1996.
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//
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// File: CSurrogate.cxx
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//
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// Contents: Class the implements the ISurrogate interface
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//
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//
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// History: 21-May-96 t-AdamE Created
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//
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//--------------------------------------------------------------------------
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#include "csrgt.hxx"
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HANDLE CSurrogate::_hEventAllLibsFree = NULL;
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CSurrogate* CSurrogate::_pSurrogate = NULL;
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//+---------------------------------------------------------------------------
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//
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// Function: CSurrogate::CSurrogate()
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//
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// Synopsis: constructor for CSurrogate
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//
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// History: 6-21-96 t-Adame Created
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//
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//----------------------------------------------------------------------------
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CSurrogate::CSurrogate() :
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_cref(0)
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{
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_pSurrogate = this;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CSurrogate::QueryInterface
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//
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// History: 6-21-96 t-Adame Created
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP CSurrogate::QueryInterface(REFIID iid, LPVOID FAR * ppv)
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{
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if(iid == IID_IUnknown)
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{
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*ppv = (void*)(IUnknown*)this;
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AddRef();
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return S_OK;
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}
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else if (iid == IID_ISurrogate)
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{
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*ppv = (void*)(ISurrogate*)this;
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AddRef();
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return S_OK;
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}
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return E_NOINTERFACE;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CSurrogate::AddRef()
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//
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// History: 6-21-96 t-Adame Created
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//
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//----------------------------------------------------------------------------
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ULONG CSurrogate::AddRef()
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{
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InterlockedIncrement((LPLONG)&_cref);
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Win4Assert(_cref > 0);
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ULONG cref = _cref;
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return cref;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CSurrogate::Release()
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//
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// Synopsis: Decrements our Reference count -- note that this
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// implementation of ISurrogate does not delete the object
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// that implements it so that we can allocate it on the stack
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//
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// History: 6-21-96 t-Adame Created
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//
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//----------------------------------------------------------------------------
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ULONG CSurrogate::Release()
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{
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Win4Assert(_cref >0);
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InterlockedDecrement((LPLONG)&_cref);
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ULONG cref = _cref;
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return cref;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CSurrogate::LoadDllServer
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//
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// Synopsis: Loads information about the dll corresponding to the specified
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// clsid into our table of loaded dlls, which implicitly
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// loads the dll into the surrogate process
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//
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// History: 6-21-96 t-Adame Created
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP CSurrogate::LoadDllServer(
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/* [in] */ REFCLSID rclsid)
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{
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return m_tblibs.LoadDllServer(rclsid);
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CSurrogate::FreeSurrogate
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//
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// Synopsis: called by OLE when there are no external references to clients
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// of dll servers that were loaded by this object. A call
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// to this function signals the surrogate process that it should
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// terminate
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//
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// History: 6-21-96 t-Adame Created
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP CSurrogate::FreeSurrogate()
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{
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return SetEvent(CSurrogate::_hEventAllLibsFree) ? S_OK : E_FAIL;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CSurrogate::WaitForSafeLibraryFree
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//
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// Synopsis: sleep the main thread of the surrogate process until OLE
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// signals us via a call to FreeSurrogate that we should terminate.
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// We then clean up by revoking all class factories for dll
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// servers loaded into the surrogate process and clear all
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// information about dll servers from our library table.
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//
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// History: 6-21-96 t-Adame Created
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//
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//----------------------------------------------------------------------------
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void CSurrogate::WaitForSafeLibraryFree()
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{
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m_tblibs.WaitForSafeLibraryFree();
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m_tblibs.Revoke();
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m_tblibs.Clear();
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}
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