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# File 'lib/final_destination/resolver.rb', line 5
def self.lookup(addr, timeout: nil)
timeout ||= default_dns_query_timeout
@mutex.synchronize do
@result = nil
@queue ||= Queue.new
ensure_lookup_thread
@lookup = addr
@parent = Thread.current
@queue << ""
sleep timeout
if !@result
@thread.kill
@thread.join
@thread = nil
if @error
@error.backtrace.push(*caller)
raise @error
else
raise Timeout::Error
end
end
@result
end
end
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