From: Zhukov Pavel <gelios@...>
Date: 2008-06-30T18:35:29+09:00
Subject: Re: Sleep in a multithreaded environment

On Mon, Jun 30, 2008 at 1:07 PM, Me Me <emanuelef@tiscali.it> wrote:
> Hi,
> I'm trying to control an external process I'm running and quit it in
> case it got
> stuck.
> To do that I have to check that the external exe keeps writing on
> stdout, if it doesn't update it for a while I'll quit it.
> I came up with the following code (using threads) but the sleep in the
> main thread blocks everything. (The same code works under Mac OSX)
> Is there something I'm doing wrong?
> Or a better way to achieve what I need?
> Thanks a lot in advance
>
> n = 0
> t1 = Thread.new
> {
> begin
>  IO.popen("executable.exe") do |pipe|
>     pipe.each("\r") do |line|
>   puts line
>   n += 1
>   end
>  end
> end
> }
>
> k = 0
> while t1.alive?
>  sleep(10) # DOESN'T SEEM TO WORK ON WINDOWS
>  if k == n
>    puts "DEAD"
>    t1.raise("close")
>  end
>  k = n
> end
> --
> Posted via http://www.ruby-forum.com/.
>
>

pipe=IO.popen("executable.exe")
io=select([io],nil,nil,10) #10 - timeout
if io==nil
   puts "DEAD"
   t1.raise("close")
end