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// 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.
#define FOR_ALL_PPAPI_RESOURCE_APIS(F) \
F(PPB_Audio_API) \
F(PPB_AudioConfig_API) \
F(PPB_AudioTrusted_API) \
F(PPB_Broker_API) \
F(PPB_Buffer_API) \
F(PPB_BufferTrusted_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_Font_API) \
F(PPB_Graphics2D_API) \
F(PPB_ImageData_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:
virtual ~ResourceObjectBase();
// 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; }
};
// 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_
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