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| author | Simon Marlow <marlowsd@gmail.com> | 2010-03-29 14:45:21 +0000 |
|---|---|---|
| committer | Simon Marlow <marlowsd@gmail.com> | 2010-03-29 14:45:21 +0000 |
| commit | 2726a2f10256710cc6ed80b1098cb32e121e1be7 (patch) | |
| tree | 81eef196c77c6a7f4581547202e664f38cc70882 /includes | |
| parent | 4b7fdaa8617e1fadc6175d2400d11fa1fc062c03 (diff) | |
| download | haskell-2726a2f10256710cc6ed80b1098cb32e121e1be7.tar.gz | |
Move a thread to the front of the run queue when another thread blocks on it
This fixes #3838, and was made possible by the new BLACKHOLE
infrastructure. To allow reording of the run queue I had to make it
doubly-linked, which entails some extra trickiness with regard to
GC write barriers and suchlike.
Diffstat (limited to 'includes')
| -rw-r--r-- | includes/rts/storage/TSO.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/includes/rts/storage/TSO.h b/includes/rts/storage/TSO.h index e07be88ac5..abe621564d 100644 --- a/includes/rts/storage/TSO.h +++ b/includes/rts/storage/TSO.h @@ -46,6 +46,7 @@ typedef struct { /* Reason for thread being blocked. See comment above struct StgTso_. */ typedef union { StgClosure *closure; + StgTSO *prev; // a back-link when the TSO is on the run queue (NotBlocked) struct MessageBlackHole_ *bh; struct MessageThrowTo_ *throwto; struct MessageWakeup_ *wakeup; @@ -163,6 +164,7 @@ typedef struct StgTSO_ { void dirty_TSO (Capability *cap, StgTSO *tso); void setTSOLink (Capability *cap, StgTSO *tso, StgTSO *target); +void setTSOPrev (Capability *cap, StgTSO *tso, StgTSO *target); // Apply to a TSO before looking at it if you are not sure whether it // might be ThreadRelocated or not (basically, that's most of the time |