Michael Tsai on Twitter: "@Catfish_Man It's the kind of thing people would implement for themselves—poorly

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David Smith ‏@Catfish_Man 4 Sep 2015 Highlands-Baywood Park, CA

I’m assuming nobody following me uses NSDistributedLock; if there is, cut it out. I think it’s not deprecated ‘cause we forgot it existed.
7 retweets 17 likes
Michael Tsai ‏@mjtsai 4 Sep 2015

@Catfish_Man What else would you suggest when there are multiple processes accessing the same file?
David Smith ‏@Catfish_Man 4 Sep 2015 Highlands-Baywood Park, CA

.@mjtsai in ascending order of squickiness: • a database • have one process use XPC to talk to a single writer • defaults • flock()
4 likes
Michael Tsai ‏@mjtsai 4 Sep 2015

@Catfish_Man Those aren't near as convenient as distributed locks with a network filesystem, but I guess that's not common these days.
2 likes
David Smith ‏@Catfish_Man 4 Sep 2015 Cupertino, CA

@mjtsai NSDistributedLock is a mkdir() spinlock. It’s prone to orphaned locks, doesn’t support donation, and is slow :/
1 like

‏@mjtsai

@Catfish_Man It's the kind of thing people would implement for themselves—poorly—if it wasn't there.

10:16 AM - 4 Sep 2015

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