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|
#
# 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<Interrupt
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
y.kill if y and y.alive?
end
end
if __FILE__ == $0
p timeout(5) {
45
}
p timeout(5) {
loop {
p 10
sleep 1
}
}
end
|
