Keep only base/extractor.[cc|h].

goopdate/com_wrapper_creator.h

-// Copyright 2009 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-
-// TODO(omaha): rename the file to match the name of the class.
-
-#ifndef OMAHA_GOOPDATE_COM_WRAPPER_CREATOR_H_
-#define OMAHA_GOOPDATE_COM_WRAPPER_CREATOR_H_
-
-#include <windows.h>
-#include <atlbase.h>
-#include <atlcom.h>
-#include "base/basictypes.h"
-#include "base/scoped_ptr.h"
-#include "base/scoped_ptr_address.h"
-#include "base/utils.h"
-#include "goopdate/omaha3_idl.h"
-#include "omaha/goopdate/model_object.h"
-#include "third_party/bar/shared_ptr.h"
-
-namespace omaha {
-
-class AppBundle;
-typedef shared_ptr<AppBundle> ControllingPtr;
-
-// Generalizes the creation of COM wrappers for a given class T.
-// It requires:
-//   * The wrapper class TWrapper derives from ComWrapper
-//   * The wrapped class T provides access to model instance
-template <typename TWrapper, typename T>
-class ComWrapper : public CComObjectRootEx<CComObjectThreadModel> {
- public:
-
-  static HRESULT Create(const ControllingPtr& controlling_ptr,
-                        T* t, IDispatch** t_wrapper) {
-    ASSERT1(t);
-    ASSERT1(t_wrapper);
-
-    ASSERT1(IsModelLockedByCaller(t->model()));
-
-    scoped_ptr<TComObject> t_com_object;
-    HRESULT hr = TComObject::CreateInstance(address(t_com_object));
-    if (FAILED(hr)) {
-      return hr;
-    }
-
-    hr = t_com_object->QueryInterface(t_wrapper);
-    if (FAILED(hr)) {
-      return hr;
-    }
-
-    t_com_object->model_ = t->model();
-    t_com_object->controlling_ptr_ = controlling_ptr;
-    t_com_object->wrapped_obj_ = t;
-
-    t_com_object.release();
-    return S_OK;
-  }
-
- protected:
-  ComWrapper() : model_(NULL), wrapped_obj_(NULL) {}
-
-  ~ComWrapper() {}
-
-  void FinalRelease() {
-    controlling_ptr_.reset();
-    wrapped_obj_ = NULL;
-  }
-
-  const Model* model() const {
-    return omaha::interlocked_exchange_pointer(&model_, model_);
-  }
-
-  const ControllingPtr& controlling_ptr() const {
-    ASSERT1(IsModelLockedByCaller(wrapped_obj_->model()));
-    return controlling_ptr_;
-  }
-
-  T* wrapped_obj() {
-    return omaha::interlocked_exchange_pointer(&wrapped_obj_, wrapped_obj_);
-  }
-
- private:
-
-  typedef CComObject<TWrapper> TComObject;
-
-  // The pointer is written and read from multiple threads and it is written
-  // to with the same value by the atomic pointer exchange, hence the volatile
-  // and mutable cv qualifiers respectively.
-  mutable Model* volatile model_;
-
-  ControllingPtr controlling_ptr_;
-
-  T* wrapped_obj_;
-
-  DISALLOW_COPY_AND_ASSIGN(ComWrapper);
-};
-
-}  // namespace omaha
-
-#endif  // OMAHA_GOOPDATE_COM_WRAPPER_CREATOR_H_
-