File indexing completed on 2024-04-21 05:42:25

 /*
   SPDX-FileCopyrightText: 2003-2006, Sergey Zorin. All rights reserved.
   SPDX-FileCopyrightText:  2018-2020 Michael Reeves reeves.87@gmail.com
   SPDX-License-Identifier: BSD-2-Clause
 */
 #include "class_factory.h"
 #include "diff_ext.h"
 #include "server.h"
 
 CLASS_FACTORY::CLASS_FACTORY() {
   _ref_count = 0L;
 
   SERVER::instance()->lock();
 }
 
 CLASS_FACTORY::~CLASS_FACTORY() {
   SERVER::instance()->release();
 }
 
 STDMETHODIMP
 CLASS_FACTORY::QueryInterface(REFIID riid, void** ppv) {
   HRESULT ret = E_NOINTERFACE;
   *ppv = nullptr;
 
   if(IsEqualIID(riid, IID_IUnknown) || IsEqualIID(riid, IID_IClassFactory)) {
     *ppv = static_cast<CLASS_FACTORY*>(this);
 
     AddRef();
 
     ret = NOERROR;
   }
 
   return ret;
 }
 
 STDMETHODIMP_(ULONG)
 CLASS_FACTORY::AddRef() {
   return InterlockedIncrement((LPLONG)&_ref_count);
 }
 
 STDMETHODIMP_(ULONG)
 CLASS_FACTORY::Release() {
   ULONG ret = 0L;
 
   if(InterlockedDecrement((LPLONG)&_ref_count) != 0)
     ret = _ref_count;
   else
     delete this;
 
   return ret;
 }
 
 STDMETHODIMP
 CLASS_FACTORY::CreateInstance(IUnknown* outer, REFIID refiid, void** obj) {
   HRESULT ret = CLASS_E_NOAGGREGATION;
   *obj = 0;
 
   // Shell extensions typically don't support aggregation (inheritance)
   if(outer == nullptr) {
     DIFF_EXT* ext = new DIFF_EXT();
 
     if(ext == nullptr)
       ret = E_OUTOFMEMORY;
     else
       ret = ext->QueryInterface(refiid, obj);
   }
 
   return ret;
 }
 
 STDMETHODIMP
 CLASS_FACTORY::LockServer(BOOL) {
   return NOERROR;
 }