Objective-C runtime

see also: method-cache implementation example

Types & selectors

objc/NSObjCRuntime.h new
objc/objc-api.h new
objc/objc.h new

Classes, methods & metadata

objc/runtime.h newTypes

Message dispatch

objc/message.h new

Synchronization & exceptions

objc/objc-exception.h new
objc/objc-sync.h new

Legacy utilities

objc/hashtable2.h new
objc/objc-auto.h newDefine OBJC_SILENCE_GC_DEPRECATIONS=1 to temporarily