mfc, service - how to install a timer?

microsoft.public.vc.mfc - Microsoft Visual C


mfc >> service - how to install a timer?

by Philipp Huber » Fri, 28 Nov 2003 16:08:45 GMT

hi!

which is the best (common) way to install something like a timer within a
service?

as everybody says using sleep was a poor thing (i agree) i am not sure how
to achieve this.

should i create a helper window that provides a timer?
is it possible at all to use a helper window when the flag
SERVICE_INTERACTIVE_PROCESS is not set?

thanks philipp



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mfc >> service - how to install a timer?

by Frank Hickman » Fri, 28 Nov 2003 16:26:09 GMT


Timers depend on a windows message pump. You do not need to actually have a
window to have a message pump but it is normal to do so. You may want to
consider using WaitForSingleObject or WaitForMultipleObjects, it really
depends on what your trying to accomplish. If you could provide some
additional information in that regard, I am sure someone here could suggest
multiple ways to accomplish it.

--
============
Frank Hickman
NobleSoft, Inc.
============
Replace the _nosp@m_ with @ to reply.









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mfc >> service - how to install a timer?

by Philipp Huber » Fri, 28 Nov 2003 16:55:03 GMT

> If you could provide some
suggest

i'd like to write a service that collects data of particle sensors in a
certain cycle (i.e. every 10 secounds).

furthermore i'd like to avoid using code like:

[...]
while( m_bServiceIsRunning )
{
DoCollectData();

Sleep( 1000 );
}
[...]

in my ServiceMain function.

instead of this i'd like to have a CMultiLock waiting on either a terminate
event or a timer event.

thanks philipp



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service - how to install a timer?

by Chris Mabey » Fri, 28 Nov 2003 17:23:51 GMT

Alternatively there are the multimedia timers which are very accurate see
timeSetEvent in the MSDN.

Chris



terminate



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service - how to install a timer?

by Scott McPhillips [MVP] » Fri, 28 Nov 2003 18:54:53 GMT





CMultiLock does not support the full capabilities of
WaitForMultipleObjects. Use WaitForMultipleObjects with a timeout
parameter.

--
Scott McPhillips [VC++ MVP]


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service - how to install a timer?

by Philipp Huber » Fri, 28 Nov 2003 19:13:08 GMT

thanks a lot.

philipp



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