On Nov 24, 2008, at 2:27 AM, Jens Miltner wrote:
Am 24.11.2008 um 11:08 schrieb WT:>And to answer one question you asked inline, NSNotificationCenter>delivers all notifications synchronously and immediately on the thread>on which they were sent. It is really just a way of indirectly >invoking methods, it doesn't know or care about threads at all.Ok, now, that's something I didn't know and which is very useful to know. Thanks!There's also NSNotificationQueue, which you could use to distribute notifications to another thread.
Only if you write your own, since NSNotificationQueue is not thread safe [1] and does not pass notifications to another thread. NSDistributedNotificationCenter always posts notifications on the main thread, but it's not intended for interthread messaging.
Apple has a document describing how to pass notifications between threads [2], but I've had a doc bug open against it for most of this year (rdar://problem/5772256) since it may be unsafe.
-- Adam [1] http://developer.apple.com/documentation/Cocoa/Conceptual/Multithreading/ThreadSafetySummary/chapter_950_section_2.html [2] http://developer.apple.com/DOCUMENTATION/Cocoa/Conceptual/Notifications/Articles/Threading.html
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