iOS strange dangling ptr

[chhoda]

I have a class

@interface myclass {
NSTimer *timer
}
@property(nonatomic, retain) NSTimer* timer;
@end

and synthesize etc.

I have two timer variables one repeat yes and another repeat no.

the problem is, "repeat Yes" timer crashes when trying to invalidate inside the function which the timer itself had fired.

when i allocate, i see timer = 0x38Axt3 ... like this, valid address.

but when trying to invalidate, the value is 0x5 or 0x3. what's wrong ?

i have made sure everywhere that neither the timer is being released or twice invalidated, that has been proved by putting breakpoints at all invalidate method calls

regards

 

[dejo]

You should probably post your implementation code here as well.

 

[chhoda]

@implementation
-int
{
    timer = [NSTimer timerWithDuration:0.2 delegate:self   selector:@selector(timerFired);
timer1 = [NSTimer timerWithDuration:0.2 delegate:self selector:@selector(timer1Fired);
}

void timerFired
{
  [timer invalidate]; // this does not have proper address (0x5)
  timer = nil;
  [timer1 invalidate]; // this has proper address
  timer1 = nil;
}
@end

 

[dejo]

How about posting the actual code? That's not even gonna compile.

 

[chhoda]

oops

i realised, there was no problem with this part of the code, after running cunit tool and fixing some other memory leaks, it vanished . spoilt lot of time and peace.

 

[chhoda]

how to stop autoreleasing

isn't there a way to stop autoreleasing altogather and may be check allocation failure ? that would probably a better way of finding exact point of bugs.

 

[dejo]

i realised, there was no problem with this part of the code...

I'm not sure how that's possible, given the code you've supplied us.

isn't there a way to stop autoreleasing altogather and may be check allocation failure ? that would probably a better way of finding exact point of bugs.

To avoid autoreleasing, do your own retaining.

 

[chhoda]

thanks

any code examples as such ? for own retaining ?

 

[jnic]

any code examples as such ? for own retaining ?

http://developer.apple.com/iPhone/library/documentation/Cocoa/Conceptual/MemoryMgmt/MemoryMgmt.html