Re: how to prevent sleep mode when app is running

FROM : Sean McBride
DATE : Thu Jun 19 22:20:10 2008

If you can require 10.5, then don't use UpdateSystemActivity(), instead,
do this:

IOPMAssertionID assertionID ;
IOReturn err = IOPMAssertionCreate (
   kIOPMAssertionTypeNoDisplaySleep,
kIOPMAssertionLevelOn,
&assertionID);


On 6/12/08 12:34 PM, Hank Heijink (Mailinglists) said:

>Look into UpdateSystemActivity(). It's in the CoreServices framework. 
>If you call it with UsrActivity every 25 seconds or so, the display 
>won't dim and the computer won't go to sleep (unless it's forced to. 
>You can't prevent that).
>
>What is your app doing that you want to resort to something as drastic 
>as preventing sleep? Someone might be able to suggest a better 
>solution to your problem if you give more details.
>
>Hank
>
>On Jun 12, 2008, at 8:27 AM, Nick Rogers wrote:
>

>> Hi,
>> When the computer goes into sleep mode my app also seems to be 
>> taking forever in doing the current task.
>> So how can I prevent the computer from going into sleep mode when my 
>> app is running?