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Re: Write an app to start and kill another app periodically [message #28632 is a reply to message #28618]

Wed, 08 September 2010 16:26

jpderyck is currently offline

jpderyck
Messages: 15
Registered: October 2008
Location: Belgium

Promising Member

Dear Honza

thanks for help,

the application that I need to monitor with a kind of watchdog communicates with a data acquisition module (LabJack U3) via usb port. It takes measures every 10 seconds and put results in a MySQL table. After running for a time between 1 month and 3 months, the application enter in hung state (the main window becomes blank) and the only thing to do is restart the program.

I do not know if the problem is in the usb reading part of the program or in the MySQL part.

In the 'main' I use two timers:
SetTimeCallback(-10000, callback(this, &MyApp::Timer1));
SetTimeCallback(-300000, callback(this, &MyApp::Timer2));

Timer1: do measure and store it to databases
Timer2: reduce size of one table to keep 7 days of data

maybe I could change this to :
mytimer.KillSet(10000, THISBACK(Timer1));
in the 'main'

and in the Timer1() function :
mytimer.Kill();
do the measures and others and at the end :
mytimer.KillSet(10000, THISBACK(Timer1));

but normally the code between stop and restart timer should not last more than 1 second and so I should never have re-entry problem but...

if you have any suggestion

best regards
Jean-Paul

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[Message index]

		Write an app to start and kill another app periodically By: jpderyck on Thu, 29 April 2010 17:33
		Re: Write an app to start and kill another app periodically By: koldo on Thu, 29 April 2010 17:51
		Re: Write an app to start and kill another app periodically By: dolik.rce on Thu, 29 April 2010 19:18
		Re: Write an app to start and kill another app periodically By: jpderyck on Fri, 30 April 2010 10:32
		Re: Write an app to start and kill another app periodically By: dolik.rce on Sat, 01 May 2010 01:21
		Re: Write an app to start and kill another app periodically By: jpderyck on Tue, 07 September 2010 15:16
		Re: Write an app to start and kill another app periodically By: dolik.rce on Tue, 07 September 2010 15:55
		Re: Write an app to start and kill another app periodically By: jpderyck on Tue, 07 September 2010 18:23
		Re: Write an app to start and kill another app periodically By: dolik.rce on Tue, 07 September 2010 22:07
		Re: Write an app to start and kill another app periodically By: andrei_natanael on Tue, 07 September 2010 23:56
		Re: Write an app to start and kill another app periodically By: jpderyck on Wed, 08 September 2010 10:56
		Re: Write an app to start and kill another app periodically By: jpderyck on Wed, 08 September 2010 10:36
		Re: Write an app to start and kill another app periodically By: dolik.rce on Wed, 08 September 2010 11:25
		Re: Write an app to start and kill another app periodically By: jpderyck on Wed, 08 September 2010 16:26

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