On 2012-03-06, at 2:51 PM, Jan E. Schotsman wrote: > Hello, > > I have an array of progress values (number objects) for subprojects, from > which I calculate the overall progress . > The array is an atomic property of the project class. > > Is it safe to access this array from multiple threads, using methods like > objectAtIndex and replaceObjectAtIndex? >
NSMutableArray is not (as far as I know) thread-safe while being mutated[1]. That said, it doesn't mean that you can't use the array in a multi-threaded environment: Just make sure that writes are all synchronized, and that enumerations only happen on immutable copies. HTH, —Mt. [1]: https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Multithreading/ThreadSafetySummary/ThreadSafetySummary.html _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com