[python-win32] Win32 WaitableTimers and Python?

[Graham Klyne]

Thanks, that's a useful pointer.

(It turns out that I'd forgotten the wait methods have a built-in timeout 
that may be just enough for my purposes.  But that's good to have as a backup.)

#g
--

At 14:02 17/07/03 -0500, Jens B. Jorgensen wrote:
>No a priori reason you could not use them but they do not seem to be in 
>the win32event module wherein they'd likely be found if they were present. 
>No need to let that stop you though. You could either write your own c(++) 
>extension module or even better you could use the ctypes module. With 
>ctypes if you wanted to wait 60 seconds you'd do this:
>
>from ctypes import *
>import win32event, win32api
>
>h = windll.kernel32.CreateWaitableTimerA(None, 0, None)
>dt = c_longlong(-60L * 10L**(9-2))
>dt_p = pointer(dt)
>windll.kernel32.SetWaitableTimer(h, dt_p, 0, None, None, 0)
>win32event.WaitForSingleObject(h, win32event.INFINITE)
>win32api.CloseHandle(h)
>
>The ctypes home page is: http://starship.python.net/crew/theller/ctypes/
>
>Graham Klyne wrote:
>
>>Hi,
>>
>>I've been hunting through the book "Python Programming on Win32", 
>>associated web pages, and Googling the web in general, without much 
>>success, for an indication of whether CreateWaitableTimer and friends can 
>>be used from Python; cf.
>>
>>http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/createwaitabletimer.asp 
>>
>>
>>In particular, I'm looking to use timers to do periodic polling functions 
>>in a service process.  I think I can use win32api.sleep for now, but I 
>>don't like hogging a thread in this way.  Being a service process, I 
>>think the window-based timers are inappropriate (if not impossible) to 
>>use here.
>>
>>Any thoughts?
>>
>>(I'm not subscribed to this list, so please copy me on any comments.)
>>
>>Thanks.
>>
>>#g
>>
>>
>>-------------------
>>Graham Klyne
>><GK at NineByNine.org>
>>PGP: 0FAA 69FF C083 000B A2E9  A131 01B9 1C7A DBCA CB5E
>>
>>
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>
>
>--
>Jens B. Jorgensen
>jens.jorgensen at tallan.com
>
>"With a focused commitment to our clients and our people, we deliver value 
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-------------------
Graham Klyne
<GK at NineByNine.org>
PGP: 0FAA 69FF C083 000B A2E9  A131 01B9 1C7A DBCA CB5E