X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=rts%2FRaiseAsync.c;h=d892e9563866a39e3f13fcd40e0274b87876735f;hb=0d88de0b114a391712bc117d42928b49fba4d66a;hp=d55595309bceb82e4b3f8f3c7d23ec3206d80258;hpb=1cb0eb071f1316d6650f354166506789a2638720;p=ghc-hetmet.git

diff --git a/rts/RaiseAsync.c b/rts/RaiseAsync.c
index d555953..d892e95 100644
--- a/rts/RaiseAsync.c
+++ b/rts/RaiseAsync.c
@@ -496,9 +496,11 @@ throwToReleaseTarget (void *tso)
    queue, but not perform any throwTo() immediately.  This might be
    more appropriate when the target thread is the one actually running
    (see Exception.cmm).
+
+   Returns: non-zero if an exception was raised, zero otherwise.
    -------------------------------------------------------------------------- */
 
-void
+int
 maybePerformBlockedException (Capability *cap, StgTSO *tso)
 {
     StgTSO *source;
@@ -514,7 +516,7 @@ maybePerformBlockedException (Capability *cap, StgTSO *tso)
 	// locked it.
 	if (tso->blocked_exceptions == END_TSO_QUEUE) {
 	    unlockTSO(tso);
-	    return;
+	    return 0;
 	}
 
 	// We unblock just the first thread on the queue, and perform
@@ -524,7 +526,9 @@ maybePerformBlockedException (Capability *cap, StgTSO *tso)
 	tso->blocked_exceptions = unblockOne_(cap, source, 
 					      rtsFalse/*no migrate*/);
 	unlockTSO(tso);
+        return 1;
     }
+    return 0;
 }
 
 void