2009/4/1 Ammar Ibrahim <ammar.ibra...@gmail.com> > On Wed, Apr 1, 2009 at 10:21 PM, Luca C. <luca.pazzere...@gmail.com> wrote >> >> >> I didn't realize the unsafety of NSAppleScript - so I have been quite >> lucky, because my usage of applescript in non-main threads haven't caused >> me >> any problems. >> >> ScriptingBridge seems not to be thread safe, too. Adding a track to the >> iTunes library using either applescript or SB will cause a block of the >> app >> if iTunes has dialog windows opened. >> >> The solution could be writing a command line application, wich does all >> the work you need, either using AS or SB. >> > > Right now, I'm more confused than I was, hehe. My question is: Why would I > care about thread safety? Assuming that everytime I communicate with iTunes > I create a thread and have the communication happen from there, even if it's > blocking and times out, it wouldn't affect my main application. I'm I > missing anything here? How would be the command line application any > different from this? >
You have to care about thread safety when using a multithreaded design.To keep it simple: The main thread of your application handles every event-related action and the user interface. So if you perform a lenghty operation in it, your application will not able to handle anything until your operation ends. To avoid that, a solution could be creating a new worker thread, in wich performing every action you need. Note that you can use only thread-safe classes in your created threads. For further information, you can read the Apple's documentation about thread safety < http://developer.apple.com/documentation/Cocoa/Conceptual/Multithreading/ThreadSafetySummary/ThreadSafetySummary.html > Creating an helper tool would be useful, since opening it will cause the creation of a new process. Your application's main thread will not be affected in any way by it. --Luca C. _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
