Hi, In <objc/objc-auto.h> I found this functions:
OBJC_GC_EXPORT BOOL objc_atomicCompareAndSwapPtr(id predicate, id replacement, volatile id *objectLocation) OBJC_GC_EXPORT BOOL objc_atomicCompareAndSwapInstanceVariable(id predicate, id replacement, volatile id *objectLocation); OBJC_GC_EXPORT BOOL objc_atomicCompareAndSwapGlobal(id predicate, id replacement, volatile id *objectLocation);
This sounds exiting! But I couldn't find any documentation for it other than the comment in the header. I presume these work like the functions from libkern (<libkern/OSAtomic.h>) ?
Can the predicate be any predicate or is it more like OSAtomic... functions in that it must have some correlation with the value at objectLocation (replacement will only be set as new value if predicate and objectLocation are equal, at least that's how I understood what "man atomic(3)" was saying about the equivalent functions from OSAtomic)?
And how do you pass the objectLocation of an instance variable without accessing them directly (e.g. "obj->ivar" which will be a hard error in the future according to compiler warnings)?
Or aren't we supposed to touch those functions at all? I don't need to know this, just got me interested that's all. Thanks for reading! André _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
