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//+-------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1992 - 1996.
//
// File: CSurrogate.cxx
//
// Contents: Class the implements the ISurrogate interface
//
//
// History: 21-May-96 t-AdamE Created
//
//--------------------------------------------------------------------------
#include "csrgt.hxx"
HANDLE CSurrogate::_hEventAllLibsFree = NULL;
CSurrogate* CSurrogate::_pSurrogate = NULL;
//+---------------------------------------------------------------------------
//
// Function: CSurrogate::CSurrogate()
//
// Synopsis: constructor for CSurrogate
//
// History: 6-21-96 t-Adame Created
//
//----------------------------------------------------------------------------
CSurrogate::CSurrogate() :
_cref(0)
{
_pSurrogate = this;
}
//+---------------------------------------------------------------------------
//
// Function: CSurrogate::QueryInterface
//
// History: 6-21-96 t-Adame Created
//
//----------------------------------------------------------------------------
STDMETHODIMP CSurrogate::QueryInterface(REFIID iid, LPVOID FAR * ppv)
{
if(iid == IID_IUnknown)
{
*ppv = (void*)(IUnknown*)this;
AddRef();
return S_OK;
}
else if (iid == IID_ISurrogate)
{
*ppv = (void*)(ISurrogate*)this;
AddRef();
return S_OK;
}
return E_NOINTERFACE;
}
//+---------------------------------------------------------------------------
//
// Function: CSurrogate::AddRef()
//
// History: 6-21-96 t-Adame Created
//
//----------------------------------------------------------------------------
ULONG CSurrogate::AddRef()
{
InterlockedIncrement((LPLONG)&_cref);
Win4Assert(_cref > 0);
ULONG cref = _cref;
return cref;
}
//+---------------------------------------------------------------------------
//
// Function: CSurrogate::Release()
//
// Synopsis: Decrements our Reference count -- note that this
// implementation of ISurrogate does not delete the object
// that implements it so that we can allocate it on the stack
//
// History: 6-21-96 t-Adame Created
//
//----------------------------------------------------------------------------
ULONG CSurrogate::Release()
{
Win4Assert(_cref >0);
InterlockedDecrement((LPLONG)&_cref);
ULONG cref = _cref;
return cref;
}
//+---------------------------------------------------------------------------
//
// Function: CSurrogate::LoadDllServer
//
// Synopsis: Loads information about the dll corresponding to the specified
// clsid into our table of loaded dlls, which implicitly
// loads the dll into the surrogate process
//
// History: 6-21-96 t-Adame Created
//
//----------------------------------------------------------------------------
STDMETHODIMP CSurrogate::LoadDllServer(
/* [in] */ REFCLSID rclsid)
{
return m_tblibs.LoadDllServer(rclsid);
}
//+---------------------------------------------------------------------------
//
// Function: CSurrogate::FreeSurrogate
//
// Synopsis: called by OLE when there are no external references to clients
// of dll servers that were loaded by this object. A call
// to this function signals the surrogate process that it should
// terminate
//
// History: 6-21-96 t-Adame Created
//
//----------------------------------------------------------------------------
STDMETHODIMP CSurrogate::FreeSurrogate()
{
return SetEvent(CSurrogate::_hEventAllLibsFree) ? S_OK : E_FAIL;
}
//+---------------------------------------------------------------------------
//
// Function: CSurrogate::WaitForSafeLibraryFree
//
// Synopsis: sleep the main thread of the surrogate process until OLE
// signals us via a call to FreeSurrogate that we should terminate.
// We then clean up by revoking all class factories for dll
// servers loaded into the surrogate process and clear all
// information about dll servers from our library table.
//
// History: 6-21-96 t-Adame Created
//
//----------------------------------------------------------------------------
void CSurrogate::WaitForSafeLibraryFree()
{
m_tblibs.WaitForSafeLibraryFree();
m_tblibs.Revoke();
m_tblibs.Clear();
}
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