On Mon, Oct 17, 2011 at 9:26 PM, Wilker <wilkerlu...@gmail.com> wrote: > Hi guys, > > Im having a little problem here with reading NSData from a file, this is the > line that starts the reading: > > NSData *fileData = [NSData dataWithContentsOfFile:path > options:NSDataReadingMappedAlways | NSDataReadingUncached error:&error]; > > I wanna it mapped always and uncached because I don't wanna read the entire > file, just some pieces of it (small pieces), so, if the user is acessing a > file from an external drive, and the file has 8gb, I only wanna read 64kb, > so, I don't wanna read it all just for 64kb. > > Giving that, sometimes, I'm receiving some crash reports, by bad memory > access, I mean it should be the map got unavailable (maybe removed the drive > or something), and the software crashes...
This is precisely why the default behavior was changed to only map files from internal volumes. Read the Lion Foundation Release Notes; search for "Safe File Mapping": http://developer.apple.com/library/mac/#releasenotes/Cocoa/Foundation.html --Kyle Sluder _______________________________________________ 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
