Move a thread to the front of the run queue when another thread blocks on it

[ghc-hetmet.git] / rts / sm / Storage.c

diff --git a/rts/sm/Storage.c b/rts/sm/Storage.c
index 3b9775e..c2a1911 100644 (file)
--- a/rts/sm/Storage.c
+++ b/rts/sm/Storage.c
@@ -721,6 +721,16 @@ setTSOLink (Capability *cap, StgTSO *tso, StgTSO *target)
 }
 
 void
+setTSOPrev (Capability *cap, StgTSO *tso, StgTSO *target)
+{
+    if (tso->dirty == 0 && (tso->flags & TSO_LINK_DIRTY) == 0) {
+        tso->flags |= TSO_LINK_DIRTY;
+        recordClosureMutated(cap,(StgClosure*)tso);
+    }
+    tso->block_info.prev = target;
+}
+
+void
 dirty_TSO (Capability *cap, StgTSO *tso)
 {
     if (tso->dirty == 0 && (tso->flags & TSO_LINK_DIRTY) == 0) {