# # timeout.rb -- execution timeout # # Copyright (C) 2000 Network Applied Communication Laboratory, Inc. # Copyright (C) 2000 Information-technology Promotion Agency, Japan # #= SYNOPSIS # # require 'timeout' # status = timeout(5) { # # something may take time # } # #= DESCRIPTION # # timeout executes the block. If the block execution terminates successfully # before timeout, it returns true. If not, it terminates the execution and # raise TimeoutError exception. # #== Parameters # # : timout # # The time in seconds to wait for block teminatation. # #=end class TimeoutError<StandardError end def timeout(sec) return yield if sec == nil begin x = Thread.current y = Thread.start { sleep sec x.raise TimeoutError, "execution expired" if x.alive? } yield sec return true ensure Thread.kill y if y and y.alive? end end if __FILE__ == $0 timeout(5) { p 10 } end