At 21:11 +0300 19/10/10, eveningnick eveningnick wrote:
> > You create the secondary thread, install the event tap in it as usual -
> > that is, create a run loop source for the tap and add the source to the
> > current run loop returned by CFRunLoopGetCurrent() - and then, erhm, run
> > the run loop in a loop :-)
>>
>> Something like (warning: typed in Eudora):
>> while (someCondition) {
>> NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
>> SInt32 result =
>> CFRunLoopRunInMode(kCFRunLoopDefaultMode,0.5,YES);
>> [pool drain];
>> if (result==kCFRunLoopRunStopped)) {
>> return;
>> }
>> }
> > should work.
>
>Why did you give 0.5 as the second param of CFRunLoopRunInMode? Is it
>the optimal value?
That means the while(condition) loop cycles every 0.5 seconds, even if nothing
happens in the runloop.
A too-low value will make your thread activate too often (making it use more
CPU when idle) and a too-high value will make it too slow to react to
"condition" being set to NO. I usually set something between 0.5 and 1; it's
optimal in the sense "works-for-me" ;-)
--
Rainer Brockerhoff <[email protected]>
Belo Horizonte, Brazil
"In the affairs of others even fools are wise
In their own business even sages err."
Blog: http://brockerhoff.net/blog
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