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Diffstat (limited to 'libobjc/README')
| -rw-r--r-- | libobjc/README | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/libobjc/README b/libobjc/README index f478d67dec8..093116fd594 100644 --- a/libobjc/README +++ b/libobjc/README @@ -39,19 +39,26 @@ adopts it -- it is not enough to inherit them. The flag `-Wprotocols' is the default which requires them defined. ++load +=========== +This method, if defined, is called for each class and category +implementation when the class is loaded into the runtime. This method +is not inherited, and is thus not called for a subclass that doesn't +define it itself. Thus, each +load method is called exactly once by +the runtime. The runtime invocation of this method is thread safe. + + +initialize =========== This method, if defined, is called before any other instance or class -methods of that particular class. This method is not inherited, and -is thus not called as initializer for a subclass that doesn't define -it itself. Thus, each +initialize method is called exactly once (or -never if no methods of that particular class is never called). -Besides this, it is allowed to have several +initialize methods, one -for each category. The order in which these (multiple methods) are -called is not well defined. I am not completely certain what the -semantics of this method is for other implementations, but this is -how it works for GNU Objective C. +methods of that particular class. For the GNU runtime, this method is +not inherited, and is thus not called as initializer for a subclass that +doesn't define it itself. Thus, each +initialize method is called exactly +once by the runtime (or never if no methods of that particular class is +never called). It is wise to guard against multiple invocations anyway +to remain portable with the NeXT runtime. The runtime invocation of +this method is thread safe. Passivation/Activation/Typedstreams |