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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_CPP_RESOURCE_H_
#define PPAPI_CPP_RESOURCE_H_
#include "ppapi/c/pp_resource.h"
/// @file
/// This file defines a Resource type representing data associated
/// with the module.
namespace pp {
/// A reference counted module resource.
class Resource {
public:
/// The default constructor.
Resource();
/// A constructor for copying a resource.
///
/// @param[in] other A Resource.
Resource(const Resource& other);
/// Destructor.
virtual ~Resource();
/// This function assigns one Resource to another Resource.
///
/// @param[in] other A Resource.
/// @return A Resource containing the assigned Resource.
Resource& operator=(const Resource& other);
/// This functions determines if this resource is invalid or
/// uninitialized.
///
/// @return true if this resource is invalid or uninitialized.
bool is_null() const { return !pp_resource_; }
PP_Resource pp_resource() const { return pp_resource_; }
/// This function releases ownership of this resource and returns it to the
/// caller.
///
/// Note that the reference count on the resource is unchanged and the caller
/// needs to release the resource.
///
/// @return The detached PP_Resource.
PP_Resource detach();
protected:
/// A constructor used when a PP_Resource is provided as a return value
/// whose reference count we need to increment.
///
/// @param[in] resource A PP_Resource.
explicit Resource(PP_Resource resource);
/// This function is called by derived class' constructors to initialize this
/// Resource with a PP_Resource that has already had its reference count
/// incremented by Core::AddRefResource. 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).
///
/// @param[in] resource A PP_Resource.
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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