Method Resource

cxx/utils.cpp:121–127

	}
	void Resource::close(){ impl->close(impl); }
	Resource::Resource(Resource& parent, Runnable cleanup) {
		std::lock_guard<std::mutex> l(parent.impl->mutex);
		if (!parent.impl->cleanup)
			throw IllegalStateException();
		impl.reset(new Impl(parent.impl, cleanup));
		parent.impl->children.insert(impl);
	}
	void Resource::swap(Resource& rhs) { impl.swap(rhs.impl); }
	Resource::Resource() {}
	Resource::Resource(const Resource& rhs) : impl(rhs.impl) { }