Question

I would like to know witch is the best practice to test if void pointer is actually an objective C object pointer (NSObject*)…

- (id)initWithExecPath:(NSString*)executePath withArgs:(NSArray*)args identifier:(NSString*)identifierString contextInfo:(void*)contextInfo {

// I would like to check here if contextInfo is an NSObject

}

Thanks…

Answer 1

Check out this post from the CocoaWithLove site:

In this post, I look at an approach for testing if an arbitrary
pointer is a pointer to a valid Objective-C object. The result from
the test is not absolutely accurate and can interfere with gdb
debugging if the pointer isn’t a valid memory location, so this is not
something you’d want to do often (and certainly not in production
code). But it can be a handy debugging tool for when you’re staring
blindly at memory you didn’t allocate.