"Roy T. Fielding" <[EMAIL PROTECTED]> writes:
> Likewise, even a mid-update context
> switch doesn't matter for a variable that is only incremented/decremented.
only if the variable is used for an approximation :)
x = 0
thread1 thread2
load x into reg A load x into reg A
TIMESLICE increment reg A
(sleeping) store reg A at x
DISPATCH
increment reg A
store reg A at x
x has been incremented twice and now has value 1
compare-and-swap can be used for this.
--
Jeff Trawick | [EMAIL PROTECTED] | PGP public key at web site:
http://www.geocities.com/SiliconValley/Park/9289/
Born in Roswell... married an alien...
