path: root/arch
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authorRich Felker <>2014-08-18 14:36:56 -0400
committerRich Felker <>2014-08-18 14:36:56 -0400
commit4992ace94232a116bdca25481ccc3d6841b83432 (patch)
treec3a6d861634c2b85ef87d93ec523220261ca7e79 /arch
parent2c4b510bae1b2841e6983a5639dd600255898442 (diff)
further simplify and optimize new cond var
the main idea of the changes made is to have waiters wait directly on the "barrier" lock that was used to prevent them from making forward progress too early rather than first waiting on the atomic state value and then attempting to lock the barrier. in addition, adjustments to the mutex waiter count are optimized. previously, each waking waiter decremented the count (unless it was the first) then immediately incremented it again for the next waiter (unless it was the last). this was a roundabout was of achieving the equivalent of incrementing it once for the first waiter and decrementing it once for the last.
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions