Add a unified resource tracker shared between the proxy and the impl.

ppapi/shared_impl/resource_object_base.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef PPAPI_SHARED_IMPL_RESOURCE_OBJECT_BASE_H_
-#define PPAPI_SHARED_IMPL_RESOURCE_OBJECT_BASE_H_
-
-#include <stddef.h>  // For NULL.
-
-#include "base/memory/ref_counted.h"
-#include "ppapi/c/pp_instance.h"
-
-#define FOR_ALL_PPAPI_RESOURCE_APIS(F) \
-  F(PPB_AudioConfig_API) \
-  F(PPB_AudioTrusted_API) \
-  F(PPB_Audio_API) \
-  F(PPB_Broker_API) \
-  F(PPB_Buffer_API) \
-  F(PPB_BufferTrusted_API) \
-  F(PPB_Context3D_API) \
-  F(PPB_DirectoryReader_API) \
-  F(PPB_FileChooser_API) \
-  F(PPB_FileIO_API) \
-  F(PPB_FileRef_API) \
-  F(PPB_FileSystem_API) \
-  F(PPB_Find_API) \
-  F(PPB_Flash_Menu_API) \
-  F(PPB_Flash_NetConnector_API) \
-  F(PPB_Flash_TCPSocket_API) \
-  F(PPB_Font_API) \
-  F(PPB_Graphics2D_API) \
-  F(PPB_Graphics3D_API) \
-  F(PPB_ImageData_API) \
-  F(PPB_InputEvent_API) \
-  F(PPB_LayerCompositor_API) \
-  F(PPB_PDFFont_API) \
-  F(PPB_Scrollbar_API) \
-  F(PPB_Surface3D_API) \
-  F(PPB_Transport_API) \
-  F(PPB_URLLoader_API) \
-  F(PPB_URLRequestInfo_API) \
-  F(PPB_URLResponseInfo_API) \
-  F(PPB_VideoCapture_API) \
-  F(PPB_VideoDecoder_API) \
-  F(PPB_VideoLayer_API) \
-  F(PPB_Widget_API)
-
-namespace ppapi {
-
-// Forward declare all the resource APIs.
-namespace thunk {
-#define DECLARE_RESOURCE_CLASS(RESOURCE) class RESOURCE;
-FOR_ALL_PPAPI_RESOURCE_APIS(DECLARE_RESOURCE_CLASS)
-#undef DECLARE_RESOURCE_CLASS
-}  // namespace thunk
-
-class ResourceObjectBase : public base::RefCounted<ResourceObjectBase> {
- public:
-  ResourceObjectBase(PP_Instance instance);
-  virtual ~ResourceObjectBase();
-
-  PP_Instance pp_instance() const { return pp_instance_; }
-
-  // Dynamic casting for this object. Returns the pointer to the given type if
-  // Inheritance-based dynamic casting for this object. Returns the pointer to
-  // the given type if it's supported. Derived classes override the functions
-  // they support to return the interface.
-  #define DEFINE_TYPE_GETTER(RESOURCE) \
-    virtual thunk::RESOURCE* As##RESOURCE();
-  FOR_ALL_PPAPI_RESOURCE_APIS(DEFINE_TYPE_GETTER)
-  #undef DEFINE_TYPE_GETTER
-
-  // Template-based dynamic casting. See specializations below.
-  template <typename T> T* GetAs() { return NULL; }
-
- private:
-  PP_Instance pp_instance_;
-
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ResourceObjectBase);
-};
-
-// Template-based dynamic casting. These specializations forward to the
-// AsXXX virtual functions to return whether the given type is supported.
-#define DEFINE_RESOURCE_CAST(RESOURCE) \
-  template<> inline thunk::RESOURCE* ResourceObjectBase::GetAs() { \
-    return As##RESOURCE(); \
-  }
-FOR_ALL_PPAPI_RESOURCE_APIS(DEFINE_RESOURCE_CAST)
-#undef DEFINE_RESOURCE_CAST
-
-}  // namespace ppapi
-
-#endif  // PPAPI_SHARED_IMPL_RESOURCE_OBJECT_BASE_H_