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// Copyright (c) 2010 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_CPP_RESOURCE_H_
#define PPAPI_CPP_RESOURCE_H_
#include "ppapi/c/pp_resource.h"
namespace pp {
// Base class for refcounted plugin resources.
class Resource {
public:
Resource();
Resource(const Resource& other);
virtual ~Resource();
Resource& operator=(const Resource& other);
// Returns true if the given resource is invalid or uninitialized.
bool is_null() const { return !pp_resource_; }
PP_Resource pp_resource() const { return pp_resource_; }
// Releases ownership of the PP_Resource and returns it to the caller.
// Note the the reference count on the resource is unchanged and the caller
// needs to release the resource.
PP_Resource detach();
protected:
// This constructor is used when we've gotten a PP_Resource as a return value
// that we need to addref.
explicit Resource(PP_Resource resource);
// Called by derived class' constructors to initialize this Resource with
// a PP_Resource that has already been AddRef'ed. It also assumes this object
// has no current resource.
//
// The intended usage is that the derived class constructor will call the
// default Resource constructor, then make a call to create a resource. It
// then wants to assign the new resource (which, since it was returned by the
// browser, is already AddRef'ed).
void PassRefFromConstructor(PP_Resource resource);
private:
PP_Resource pp_resource_;
};
} // namespace pp
inline bool operator==(const pp::Resource& lhs, const pp::Resource& rhs) {
return lhs.pp_resource() == rhs.pp_resource();
}
#endif // PPAPI_CPP_RESOURCE_H_
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