[Mono-osx] Objective-C and Mono's GC
andreas.faerber at web.de
Wed Jan 14 12:25:21 EST 2009
Am 13.01.2009 um 21:10 schrieb Martin Smith:
> We are working on an application where we're embedding Mono in an
> Objective-C application. One of the issues that we're seeing is
> that if the GC does not "see" pointers that are stored in Objective-
> C objects. The side effect is that when we run our applications,
> the Obj-C objects will have instance variables that will eventually
> raise a SIGSEV (NullReferenceException) whenever the garbage
> collector runs.
> Does anyone else have experience with this problem? I know one of
> the things we could probably do is maintain a data structure that
> stores all the "live" mono pointers and then write smart pointer
> classes that explicitly maintained ref counts on these objects, but
> I'm wondering if there's an easier way.
I have successfully used GC handles from Cocoa, locking and obtaining
a pointer only when necessary.
Locking only when needed is important for the future "sgen" collector,
which can thus move the objects around while they are not locked.
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