Messages in this thread | | | Date | Tue, 25 Apr 2006 11:15:30 +0200 (MEST) | From | Mikael Pettersson <> | Subject | Re: [PATCH] Profile likely/unlikely macros |
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On Mon, 24 Apr 2006 19:57:47 -0700, Daniel Walker wrote: >+ if (likeliness->type & LIKELY_UNSEEN) { >+ if (atomic_dec_and_test(&likely_lock)) { >+ if (likeliness->type & LIKELY_UNSEEN) { >+ likeliness->type &= (~LIKELY_UNSEEN); >+ likeliness->next = likeliness_head; >+ likeliness_head = likeliness; >+ } >+ } >+ atomic_inc(&likely_lock); >+ }
I'm pretty sure one can do this (prepending an element to a list) w/o fiddling with locks by using CAS and looping until successful.
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