[Boost-users] bind with weak_ptr

Subject: [Boost-users] bind with weak_ptr
From: Christopher Pisz (cpisz_at_[hidden])
Date: 2011-10-10 11:21:39

I see many posts when I google this problem. I wonder, since most of them are 
dated 1.35 and previous, if there was ever a solution to this problem?

I think this fellow says it best when he posted,
"My problem is, that when i bind member functions, if i specify the instance 
of the class as a shared_ptr, then i get memory leaks because the binding's 
shared_ptr to the instance keeps it alive, and it potentially produces cyclic 
references that in the current model, would be complicated to break.

And of course, if i use raw pointers to the binding instances, then i'll get a 
crash if the instance has been destroyed and i try to execute the binding 
function.

So what i would need, is to use bind with weak pointers, and just do nothing 
if locking it fails."

http://www.gamedev.net/topic/494089-help-boostbind-and-shared-pointers/

I've almost went to just using raw pointers and letting the program crash if 
the instance to which the member bound no longer exists. I hate to do that.