Re: NSThread in Debug mode loading code issue
Re: NSThread in Debug mode loading code issue
- Subject: Re: NSThread in Debug mode loading code issue
- From: Marc Van Olmen <email@hidden>
- Date: Mon, 19 Jun 2006 21:02:08 -0400
I did some more research on this and currently it still think that
this is something weird during loading:
anObject = [[MyBitmap alloc] initWithContents:aPath];
In the: initWithContents:
first line of code I put NSLog(@"MyBitmap initWithContents");
and in case I create quickly 2 threads with same task/code
Online one time this "MyBitmap initWithContents" is printed in log
files and the second thread creates an empty object.
So when I wait a second between those threads everything is as expected.
Also afterwards I have no problem in creating quickly a lot of those
similar threads.
regards,
marc
On 17 Jun 2006, at 16:57, Marc Van Olmen wrote:
On 17 Jun 2006, at 16:11, James Bucanek wrote:
I doubt this has anything to do with ZeroLink, other than the
timing of ZeroLink is probably exposing a race condition in your
code. Or, said another way, ZeroLink slightly purturbs the timing
of your application and you see the bug.
If I had to take a wild guess (and without any other details), I'd
say that anObject is probably a global or an instance variable of
an object and you've started two threads using the same object.
These two threads are, therefore, sharing the same variable and
one is clearing the value while the second thread is trying to use
it. This is pretty common multi-thread bug.
It is a local variable so not that case.
marc
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