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authorEdward Z. Yang <ezyang@mit.edu>2013-07-08 11:03:35 -0700
committerEdward Z. Yang <ezyang@mit.edu>2013-07-09 11:29:11 -0700
commit70e20631742e516c6a11c3c112fbd5b4a08c15ac (patch)
treed0097f8b1c8e5c0a67b26bb950c036ea7684c65d /compiler/DEPEND-NOTES
parentca9a431401755f119d97dec59a1fc963a8e9f681 (diff)
downloadhaskell-70e20631742e516c6a11c3c112fbd5b4a08c15ac.tar.gz
Implement atomicReadMVar, fixing #4001.
We add the invariant to the MVar blocked threads queue that threads blocked on an atomic read are always at the front of the queue. This invariant is easy to maintain, since takers are only ever added to the end of the queue. Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
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