Thanks for your quick response to my first post to the list and apologies for being off-topic. Your answers/suggestions make lot of sense to me. If any other JavaScriptCore experts want to weigh in with their recommendations, it would certainly be much appreciated as well.
- Yadong On Tue, Sep 29, 2015 at 10:04 PM, Darin Adler <da...@apple.com> wrote: > On Sep 29, 2015, at 8:40 PM, Yadong Liu <yad...@fingerprintplay.com> > wrote: > > So my question is: what I need to do to make sure the my Objective-C > object's dealloc() is called immediately as soon as my JavaScript code > removes all references to the object? > > > JavaScriptCore manages storage with garbage collection. With garbage > collection, there is no guarantee that an object will be deallocated as > soon as code removes all references to an object; that won’t happen until > garbage collection later determines it can deallocate the object. The > object will be deallocated some time later, but not promptly. > > If you need to promptly deallocate a particular Objective-C object at a > well defined time, then you will need to change your design so that the > deallocation of the object in question is driven by an explicit function > call, not by the timing of garbage collection. Typically that means that > work that was done in the “dealloc” method is instead done in some other > method, one called explicitly from JavaScript. The object you pass to > -[JSValue valueWithObject:inContext:] should typically be a small wrapper > object, not a large object that would drive a need to deallocate it > promptly. > > There may be some other JavaScriptCore experts on the list that can > elaborate further. > > By the way, this mailing list is normally for the development *of* WebKit, > not for tips on how to use it properly. There are some other lists for > that, such as http://lists.webkit.org/mailman/listinfo/webkit-help and > http://www.lists.apple.com/mailman/listinfo/webkitsdk-dev — I decided to > answer your question here even though it’s off topic. Please see > http://www.webkit.org/contact.html for details. > > — Darin > -- - Yadong Sr. Mobile Engineer Fingerprint Digital Inc. http://www.fingerprintplay.com 1-855-KID-GAME *News: Samsung and Fingerprint Announce Kids Mobile Play and Learn Network <http://www.prnewswire.com/news-releases/samsung-and-fingerprint-partner-to-create-mobile-play-and-learn-network-for-kids-companies-launch-initiative-to-drive-app-development-234570981.html>* Check out our latest apps at <http://www.fingerprintplay.com/> https://itunes.apple.com/us/artist/fingerprint/id473099999 Like us on Facebook at https://www.facebook.com/FingerprintPlay
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