Re: CoreData multithreading question: @synchronized

FROM : Shawn Erickson
DATE : Wed Apr 04 19:42:01 2007

On Apr 4, 2007, at 10:28 AM, Ruotger Skupin wrote:

> Hi,
>
> a short CoreData question. according to the manual:
>
> Managed objects themselves are not thread safe. In order to work 
> with a managed object across different threads, you should lock its 
> context (see NSLocking).
>
> Does that mean I can do a
>
> @synchronized(myManagedObjectContext)
> {
>     // .. do stuff
> }
>
> or do I have to do a:
>
> [myManagedObjectContext lock];
> {
>     // .. do stuff
> }
> [myManagedObjectContext unlock];


The later otherwise you are likely not using the same locking construct.

In general I believe the recommend practice is to not attempt to 
modify a given managed object instance across threads but instead use 
a managed object context per thread and only modify the objects you 
get from the context on that given thread.

-Shawn