K 10
svn:author
V 7
delphij
K 8
svn:date
V 27
2005-02-27T17:45:55.000000Z
K 7
svn:log
V 346
Change the spin lock logic to a reasonable one.  We should spin when
the lock is held by other thread, but not when nobody owns it.  According
to deischen@, this part of code will never be hit in our threads
library, since it does not use locks without wait/wakeup functions.

Spotted by:	mingyanguo via ChinaUnix.net forum
Reviewed by:	deischen

END