def socket
@mutex.lock if @multithread
return @sock if @sock and not @sock.closed?
@sock = nil
return if @retry and @retry > Time.now
begin
@sock = timeout CONNECT_TIMEOUT do
TCPSocket.new @host, @port
end
if Socket.constants.include? 'TCP_NODELAY' then
@sock.setsockopt Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1
end
@retry = nil
@status = 'CONNECTED'
rescue SocketError, SystemCallError, IOError, Timeout::Error => err
mark_dead err.message
end
return @sock
ensure
@mutex.unlock if @multithread
end