Re: Threadsafe copy of objective c object
Re: Threadsafe copy of objective c object
- Subject: Re: Threadsafe copy of objective c object
- From: Dave <email@hidden>
- Date: Tue, 03 Sep 2013 13:26:28 +0100
Opps! Typeo, should read:
[myCurrentObject setValuesFromObject: myNewObject];
Dave
On 3 Sep 2013, at 11:52, Jonathan Taylor <email@hidden> wrote:
> This feels like it should be a very basic question, but it's not one I've managed to find an answer to - can somebody here advise?
>
> I have an objective c object which contains a number of properties that serve as parameters for an algorithm. They are bound to UI elements. I would like to take a snapshot copy of the object that will be used for one whole run of the algorithm (rather than risk parameters changing halfway through the run). i.e. I just want to do [myObject copy].
>
> The complication is in ensuring this is threadsafe: ideally I would like to make the copy on a thread other than the main thread. My understanding is that properties themselves, even when designated atomic, are in some way not fully threadsafe, although I haven't found a clear explanation of exactly what makes them unsafe. I don't know if the 'copy' method is threadsafe or not, I am inclined to suspect not.
>
> Is there any way, then, that I can take a copy in a threadsafe manner? If necessary I can do the copy on the main thread, but I would prefer not to have to do that for timing reasons. Any suggestions?
>
> Cheers
> Jonny.
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