NSLock behavior

[Morgan Giddings]

I am not sure whether this is a bug, or a difference in  
interpretation of the OpenStep spec... I apologize if this has been  
discussed before.

In Cocoa Foundation, if I have an NSLock that has not already been  
locked, and I do:

[myLock unlock]

it is ignored, and the program continues.

In GNUStep, the same thing (trying unlock on something that has not  
been locked), it causes an exception.  This is because in the GNUStep  
implementation, if objc_mutex_unlock returns -1, the exception is  
raised.  Is this necessary?

I wouldn't ask about this, except that working around the difference  
in the code I'm porting is not entirely trivial....

Thanks!

Morgan Giddings, Assistant Professor
Departments of Microbiology/Immunology and Biomedical Engineering
UNC-Chapel Hill
919-843-3513, giddings@unc.edu
http://bioinfo.unc.edu/giddings.html