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// Copyright 2014 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 MOJO_PUBLIC_CPP_APPLICATION_LAZY_INTERFACE_PTR_H_
#define MOJO_PUBLIC_CPP_APPLICATION_LAZY_INTERFACE_PTR_H_
#include "mojo/public/cpp/application/connect.h"
#include "mojo/public/interfaces/application/service_provider.mojom.h"
namespace mojo {
template <typename Interface>
class LazyInterfacePtr : public InterfacePtr<Interface> {
public:
LazyInterfacePtr() : service_provider_(nullptr) {}
LazyInterfacePtr(ServiceProvider* service_provider)
: service_provider_(service_provider) {}
void set_service_provider(ServiceProvider* service_provider) {
if (service_provider != service_provider_) {
InterfacePtr<Interface>::reset();
}
service_provider_ = service_provider;
}
Interface* get() const {
if (!InterfacePtr<Interface>::get()) {
mojo::ConnectToService<Interface>(
service_provider_, const_cast<LazyInterfacePtr<Interface>*>(this));
}
return InterfacePtr<Interface>::get();
}
Interface* operator->() const { return get(); }
Interface& operator*() const { return *get(); }
private:
ServiceProvider* service_provider_;
};
} // namespace mojo
#endif // MOJO_PUBLIC_CPP_APPLICATION_LAZY_INTERFACE_PTR_H_
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