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Bug #4027 » sigchldtest.rb

nagachika (Tomoyuki Chikanaga), 11/05/2010 07:39 PM

 
require "monitor"

class Test
include MonitorMixin

def initialize
mon_initialize
@cond = new_cond
@flag = false
@thread = nil
end

attr_reader :flag

def start
@thread = Thread.start do
synchronize do
while true
@cond.wait_until{ @flag }
@flag = false
begin
while true
Process.wait
end
rescue Errno::ECHILD
end
end
end
end
end

def set_signal_handler
Signal.trap(:CHLD) do
synchronize do
@flag = true
@cond.signal
end
end
end
end

o = Test.new
o.set_signal_handler
o.start

while true
1000.times do
Process.spawn("ls > /dev/null")
end
sleep 1
p o.flag
end

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