It's not. Documented in the Thread Programming Guide.
On 1 Nov, 2011, at 8:27, Jens Alfke <j...@mooseyard.com> wrote: > I have some code that uses a shared NSDateFormatter instance to convert dates > to/from ISO-8601 format. This code is now being invoked on multiple threads, > and I’m getting intermittent malloc warnings about double frees, and one > actual crash. > My assumption was that an NSDateFormatter should be thread-safe as long as I > treat it as read-only (not changing any attributes) but this makes me think > I’m wrong. Anyone know for sure? > > Here’s the usual backtrace I see in a malloc warning or crash: > > #0 0x018f83b4 in icu::OlsonTimeZone::operator= () > #1 0x018f9f2d in icu::OlsonTimeZone::clone () > #2 0x018bb400 in icu::DateFormat::parse () > #3 0x01964d05 in udat_parse () > #4 0x01623161 in CFDateFormatterGetAbsoluteTimeFromString () > #5 0x01622f8e in CFDateFormatterCreateDateFromString () > #6 0x006bf7e9 in getObjectValue () > #7 0x006bf701 in -[NSDateFormatter > getObjectValue:forString:errorDescription:] () > #8 0x006bfa3f in -[NSDateFormatter dateFromString:] () > … > > —Jens > > _______________________________________________ > > 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/rols%40rols.org > > This email sent to r...@rols.org _______________________________________________ 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
