From: J-Van <joevandyk@...>
Date: 2006-11-11T10:28:18+09:00
Subject: Re: win32/process question

On 11/10/06, Park Heesob <phasis68@hotmail.com> wrote:
> >From: J-Van <joevandyk@gmail.com>
> >Reply-To: ruby-talk@ruby-lang.org
> >To: ruby-talk@ruby-lang.org (ruby-talk ML)
> >Subject: Re: win32/process question
> >Date: Sat, 11 Nov 2006 09:29:10 +0900
> >
> ....
> >
> >If I use Process.waitpid in a thread, all the other threads seem to
> >block until the process that I'm waiting for stops.
> >
> >I'm writing a program that runs on a windows machine that listens for
> >requests to start and kill programs.  It needs to be able to run and
> >kill multiple programs and needs to be able to monitor the programs
> >that it has started to make sure that they are still running.  If
> >Process.waitpid makes the whole Ruby process hang, that's no good.
> >
> >Joe
> >
> If you don't want blocking, try WaitForSingleObect like this:
>
> require 'win32/process'
> include Windows::Handle
> include Windows::Synchronize
>
> info = Process.create :app_name=>'notepad'
>
> begin
>   i = WaitForSingleObject(info.process_handle,10)
>   if i==WAIT_OBJECT_0
>     CloseHandle(info.process_handle)
>     CloseHandle(info.thread_handle)
>   end
>
>   # do something
>
> end while i==WAIT_TIMEOUT

Thanks -- I'll try that.  I'm not exactly sure what those functions do
though.  :-)

Joe