[libdispatch-dev] [PATCH] Quiet the warning of unused return value

[Joakim Johansson]

I get a warning as the return value is not checked from dispatch_atomic_cmpxchg() - as it is in all other 11 usages of it.

Attached is a patch that just discards the return value accordingly to quiet this warning.

Joakim

Index: src/queue.c
===================================================================
--- src/queue.c	(revision 197)
+++ src/queue.c	(working copy)
@@ -377,7 +377,7 @@
 		// The first xchg on the tail will tell the enqueueing thread that it
 		// is safe to blindly write out to the head pointer. A cmpxchg honors
 		// the algorithm.
-		dispatch_atomic_cmpxchg(&dq->dq_items_head, mediator, NULL);
+		(void) dispatch_atomic_cmpxchg(&dq->dq_items_head, mediator, NULL);
 		_dispatch_debug("no work on global work queue");
 		return NULL;
 	}