Re: Variable scope/lifetime of class methods (concerns Threads)
Re: Variable scope/lifetime of class methods (concerns Threads)
- Subject: Re: Variable scope/lifetime of class methods (concerns Threads)
- From: j o a r <email@hidden>
- Date: Thu, 18 May 2006 16:38:43 +0200
On 18 maj 2006, at 16.01, Ole Voß wrote:
What I meant is that the variables used within a method are unique
to the object it is used within.
Instance variables are created with the object, not shared between
objects or available in a global scope, that is true.
What I meant here are the variables used within the class method.
These are unique as opposed to the variables of a method of an
object that is instantiated?
There are no special type of variables for class methods (ie. while
there are instance variables, there are no class variables). You
might think of "static" variables (often used as a substitute for
proper class variables), or other variables with a global scope.
Additional details for Cocoa programmers:
<http://developer.apple.com/documentation/Cocoa/Conceptual/
Multithreading/index.html>
For more basic / fundamental discussions on the topic of thread
safety (ie. not particular to Cocoa), I suggest you pick up some good
book, or use Google.
j o a r
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