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* add word-sized ctz function to atomic.hRich Felker2011-04-271-2/+8
| | | | | | strictly speaking this and a few other ops should be factored into asm.h or the file should just be renamed to asm.h, but whatever. clean it up someday.
* optimize contended normal mutex case; add int compare-and-swap atomicRich Felker2011-03-171-0/+7
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* move arch-specific internal headers into placeRich Felker2011-02-151-0/+110