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| author | Edward Z. Yang <ezyang@mit.edu> | 2013-07-08 11:03:35 -0700 |
|---|---|---|
| committer | Edward Z. Yang <ezyang@mit.edu> | 2013-07-09 11:29:11 -0700 |
| commit | 70e20631742e516c6a11c3c112fbd5b4a08c15ac (patch) | |
| tree | d0097f8b1c8e5c0a67b26bb950c036ea7684c65d /rts/sm/Compact.c | |
| parent | ca9a431401755f119d97dec59a1fc963a8e9f681 (diff) | |
| download | haskell-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>
Diffstat (limited to 'rts/sm/Compact.c')
| -rw-r--r-- | rts/sm/Compact.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/rts/sm/Compact.c b/rts/sm/Compact.c index 9c98dc9895..247f1a01c6 100644 --- a/rts/sm/Compact.c +++ b/rts/sm/Compact.c @@ -442,6 +442,7 @@ thread_TSO (StgTSO *tso) thread_(&tso->global_link); if ( tso->why_blocked == BlockedOnMVar + || tso->why_blocked == BlockedOnMVarRead || tso->why_blocked == BlockedOnBlackHole || tso->why_blocked == BlockedOnMsgThrowTo || tso->why_blocked == NotBlocked |