See when process exits in Windows XP

[Brad Tilley]

Tobias Pfeiffer wrote:
> Hi!
> 
> On 17 Okt 2004, Brad Tilley wrote:
> 
> 
>>def wait_for_ntbackup_to_exit(procname):
>>     while True:
>>         try:
>>             pids = \
>>             win32pdhutil.FindPerformanceAttributesByName(procname) 
>>             if len(pids) > 0:
>>                 ## If ntbackup is running, loop until it closes.
>>                 print pids
>>                 print len(pids)
>>                 print "ntbackup is running... waiting for it to
>>                 exit." continue
>>             else:
>>                 ## ntbackup is not running.
>>                 break
>>         except:
>>             return
> 
> 
> I have no clue about that win32pdhutil thingy but if it returns a list 
> with pids, then why do you need the except statement?

 From trial and error, I found that if this function runs when ntbackup 
isn't running that it would produce an error... that's the reason for 
the except. I can reproduce it if you want the exact error message.

  And it seems to me
> that this loops as fast as the CPU is able to, so it actually steals away 
> other processe's CPU time. If you insert a time.sleep(0.5) statement (or 
> something similar), you can decrease the CPU usage to a minimum.

You're right, I did this and it helps.