Re: ARC + CF types
Re: ARC + CF types
- Subject: Re: ARC + CF types
- From: David Duncan <email@hidden>
- Date: Mon, 29 Aug 2011 07:28:36 -0700
On Aug 29, 2011, at 7:20 AM, Thomas Davie wrote:
> I'm not really very clear on how ARC and CF types are meant to interact yet, because of that I've managed to create some buggy code, could someone have a quick stare at this and tell me what I've misunderstood that's causing a segfault when adding to the mutable set:
Given "id foo" and "CFTypeRef bar":
// assign bar to foo without making any implicit change to bar – traditional toll free bridging
foo = (__bridge id)bar;
// consume bar to create an ARC managed reference in foo – replaces foo = (id)bar; [foo release];
foo = (__bridge_transfer id)bar;
// retain foo and manage it as a non-ARC reference – replaces bar = (CFTypeRef)[foo retain];
bar = (__bridge_retain CFTypeRef)foo;
--
David Duncan
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