# # 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 termination. # # : [exception] # # The exception class to be raised on timeout. # #=end module Timeout class Error<Interrupt end def timeout(sec, exception=Error) return yield if sec == nil or sec.zero? begin x = Thread.current y = Thread.start { sleep sec x.raise exception, "execution expired" if x.alive? } yield sec # return true ensure y.kill if y and y.alive? end end module_function :timeout end # compatible def timeout(n, e=Timeout::Error, &block) Timeout::timeout(n, e, &block) end TimeoutError = Timeout::Error if __FILE__ == $0 p timeout(5) { 45 } p timeout(5, TimeoutError) { 45 } p timeout(nil) { 54 } p timeout(0) { 54 } p timeout(5) { loop { p 10 sleep 1 } } end