On Tue, Feb 15, 2011 at 5:28 PM, Laurent Sansonetti
wrote:
> Hi Alan,
> Do you control the data structure that holds a reference to 'B'? If yes, you
> may want to use NSHashTable which supports weak references.
> To me, this sounds like a design problem. Maybe your project can be
> re-architecture
Another important use of weakrefs came to mind: avoiding finalization.
In general, finalizers are a bad idea. They often block GC, or at
least block each other. They add overhead to GC cycles, since either
finalizers must be run or objects must be enqueued for another thread
to run their finalizer
Hi Laurent,
Thanks for your suggestion - yes I do have control of the data structure, so I
am able to implement it differently, I'll take a look at NSHashTable, I'll also
consider if there is a way of avoiding this pattern.
I've did a bit more research and there seems to be another more underlyi
Hi Alan,
Do you control the data structure that holds a reference to 'B'? If yes, you
may want to use NSHashTable which supports weak references.
To me, this sounds like a design problem. Maybe your project can be
re-architectured to avoid this pattern.
Laurent
On Feb 15, 2011, at 12:22 AM, A
Hi Laurent,
Thanks for the response. In essence the problem I have is something like this:
Object 'A' is created, then to handle Key Value Observing, Object 'B' is
created which holds an instance variable to Object 'A'. 'B' is held in a hash
or array somewhere. Object 'B' only has a purpose whil
Hi Alan,
MacRuby should have the same problem. ObjectSpace._id2ref in MacRuby basically
maps an object pointer value to a numerical description, and the GC recycles
objects.
I am curious why you need weak references, though. MacRuby is able to detect
and deal with reference cycles, so you sho
Hello everyone,
I've been doing some research into weak references in ruby and from what I've
read it seems that Ruby's WeakRef implementation is both inefficient and
unsafe. Here is the thread discussing the matter:
http://redmine.ruby-lang.org/issues/show/4168
As Macruby has a different garbag
