Re: Pointer to id
Re: Pointer to id
- Subject: Re: Pointer to id
- From: Pontus Ilbring <email@hidden>
- Date: Mon, 2 Jan 2006 02:21:20 +0100
On 1/2/06, Sanri Parov <email@hidden> wrote:
> Hi everybody,
>
> very fond of the large thread I've started with pointers, I beg your
> pardon if I ask you another very silly question.
> I've got to detach a new thread with
> detachNewThreadSelector:toTarget:withObject:
>
> The problem stands in the fact that "withObject" accepts only "id",
> while I need to send a pointer ( PortAudioStream *stream) instead.
> If I put "stream" in detachNewThreadSelector: the debugger complains
> and halts, while if I set nil everything is ok.
> How can I bypass this awful situation?
The NSValue class is capable of wrapping a pointer inside an object.
You can sometimes get away with simply casting a pointer or integer to
id, though it may not be a good idea, but
detachNewThreadSelector:toTarget:withObject: needs real objects
because it retains them when the thread is detached and releases them
when it terminates, and only real objects respond to retain and
release messages.
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