module IO::Event::Selector

def self.default(env = ENV)
	if name = env["IO_EVENT_SELECTOR"]&.to_sym
		return const_get(name)
	end
	
	if self.const_defined?(:URing)
		URing
	elsif self.const_defined?(:EPoll)
		EPoll
	elsif self.const_defined?(:KQueue)
		KQueue
	else
		Select
	end
end