On 12 Nov 2011, at 18:45, Nathan Sims wrote: > On Nov 12, 2011, at 10:56 AM, Thomas Davie wrote: >> Okay, does this mean that an object instantiated by a C function has >> persistence across C function calls? In the example above you have: >> [objcCode call]; >> I'm guessing I would have to have: >> ObjcCode *objcCode; >> declared globally in the library, and that would suffice? > > Declared somewhere certainly – I would highly recommend against it being a > global though for all the usual reasons to avoid globals.
Hmm, if not a global, where would the declaration go? The C function certainly shouldn't return it, so if it is to remain persistent across calls, wouldn't the logical (the only?) place for it be as a global in the library's .m file? Something like this: mylibrary.m: ------------------------------------------------- #import "ObjcCode.h" ObjcCode *objcCode; . . . int setup_data() { objcCode = [[ObjcCode alloc]init]; return 0; } int get_float_data(float *result1, float *result2) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; [objcCode call]; *result1 = [more stuff]; etc.; [pool drain]; return 0; } int quit_data() { [objcCode release]; objcCode = nil; return 0; } _______________________________________________ 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