K 10
svn:author
V 7
davidxu
K 8
svn:date
V 27
2010-01-05T03:39:31.222656Z
K 7
svn:log
V 200
Don't check has_waiters twice, inline some small functions.
performance result on my machine:
	mutex     Elapsed: 902115 us; per iteration: 90 ns.
	semaphore Elapsed: 958780 us; per iteration: 95 ns.

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