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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PPAPI_SHARED_IMPL_SCOPED_PP_RESOURCE_H_
#define PPAPI_SHARED_IMPL_SCOPED_PP_RESOURCE_H_
#include "ppapi/c/pp_resource.h"
#include "ppapi/shared_impl/ppapi_shared_export.h"
namespace ppapi {
class Resource;
// This is a version of scoped_refptr but for PP_Resources.
class PPAPI_SHARED_EXPORT ScopedPPResource {
public:
struct PassRef {};
ScopedPPResource();
// Takes one reference to the given resource.
explicit ScopedPPResource(PP_Resource resource);
// Assumes responsibility for one ref that the resource already has.
explicit ScopedPPResource(const PassRef&, PP_Resource resource);
// Helper to get the PP_Resource out of the given object and take a reference
// to it.
explicit ScopedPPResource(Resource* resource);
// Implicit copy constructor allowed.
ScopedPPResource(const ScopedPPResource& other);
~ScopedPPResource();
ScopedPPResource& operator=(PP_Resource resource);
ScopedPPResource& operator=(const ScopedPPResource& resource);
// Returns the PP_Resource without affecting the refcounting.
PP_Resource get() const { return id_; }
operator PP_Resource() const { return id_; }
// Returns the PP_Resource, passing the reference to the caller. This class
// will no longer hold the resource.
PP_Resource Release();
private:
// Helpers to addref or release the id_ if it's non-NULL. The id_ value will
// be unchanged.
void CallAddRef();
void CallRelease();
PP_Resource id_;
};
} // namespace ppapi
#endif // PPAPI_SHARED_IMPL_SCOPED_PP_RESOURCE_H_
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