On Sep 18, 2009, at 11:04 AM, Stuart Malin wrote: > I am under the impression that the reference returned by NSString's > UTF8String method is valid for the life of the NSString instance which > provided the reference (and further, that the memory of the referenced > C string is freed when the NSString is released). Is this correct?
If I read the documentation, I get a different impression: === The returned C string is automatically freed just as a returned object would be released; you should copy the C string if it needs to store it outside of the autorelease context in which the C string is created === To me that indicates that the returned string may be autoreleased before the NSString is released. Jesper > > I have a class with some (statically allocated) class variables. In > the class's -initialize method, I create a retained NSString. I set > one of the class variables to the value returned by -UTF8String (as > sent to that retained NSString). I use this char* value in some C > calls made from instance methods of the class. > > The first time an object of the class is instantiated, this works > fine. But it seems that for subsequent instances, although the value > of the char* pointer remains unchanged, the memory it is pointing to > is changed (i.e., no longer a C string representation of the > NSString). So, either the NSString has done something with the memory > pointed to by the initialized reference (i.e., I can't hold onto the > reference as I have been), or somehow the memory is getting corrupt in > some other way. I will look into the latter but only if my assumption > about the former is correct. > > TIA. > > > _______________________________________________ > > 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/jsbache%40adobe.com > > This email sent to jsba...@adobe.com _______________________________________________ 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
