Porcess control on win32

[Mark Hammond]

Ben C wrote:
> Hi,
> 
> I am trying to achieve this scenario on a Win32 machine ... 
> 
> a. create a lot of new processes (ie. open application 'x' a number of
> times with different args)
> 
> b. each time 1 of the processes exits ... do something
> 
> I have looked at using somehting like this
> 
> ...
> 
> project_lst = ['application1', 'application2', 'application3', etc]
> 
> for application in project_lst:
> 
>     process, thread, pid, tid = win32process.CreateProcess(
>     None,
>     application ,
>     None,
>     None,
>     0,
>     win32process.NORMAL_PRIORITY_CLASS,
>     None,
>     None,
>     win32process.STARTUPINFO())
>     
>     win32event.WaitForSingleObject(process, win32event.INFINITE)
> 
>     print 'Application %s Has Just Exited) % (application,)
> ...
> 
> The problem with this structure is it spawns each application in
> sequence ... how can I modify this sructure to spawn all applications
> simultaneously and still have the print statement executed only when
> one of the projects exits?

Something like:
   processes = []
   for app in project_lst:
      p, t, pid, tid = win32process.CreateProcess(...)
      processes.append(p)

   while processes:
     # Wait for one, then remove that one from the list.
     rc = win32event.WaitForMultipleObjects(processes, INFINITE, 0)
     offset = rc - win32con.WAIT_OBJECT_0
     del processes[offset]

Mark.