I've added code to NSObject.m in subversion trunk to use atomic
increment and decrement for the retain count rather than using
locks. this should make a big increase to performance in
applications with a lot of active threads.
The new code should work on gnu/linux intel machines and on mswindows
machines, but all other systems should fall back to using locks.
Could people with other systems please.
1. try it out to make sure that the fallback to use locks works
correctly.
2. if possible, contribute code to use atomic increment and decrement
instructions on their machine.
The use of the atomic operations should be pretty clear, just search
for 'GSATOMIC' in NSObject.m
Of course, spotting any mistakes would be good too.
The other tricky thing today was porting NSAffineTransform
optimisations from mySTEP ... the changes there will require a
rebuild of the gui andfback libraries since the size of
NSAffineTransform objects has changed. Also, while I definitely
fixed a couple of bugs (one in the original code and one in the
mySTEP code), I could have introduced others ... please look out for
any reproducible oddities.
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