StgTSO * unblockOne (Capability *cap, StgTSO *tso);
StgTSO * unblockOne_ (Capability *cap, StgTSO *tso, rtsBool allow_migrate);
StgTSO * unblockOne (Capability *cap, StgTSO *tso);
StgTSO * unblockOne_ (Capability *cap, StgTSO *tso, rtsBool allow_migrate);