make warnings go away

[model-checker-benchmarks.git] / mpmc-queue / mpmc-queue.h

diff --git a/mpmc-queue/mpmc-queue.h b/mpmc-queue/mpmc-queue.h
index 918415fa99278e0a8cc3d47622f84de00749445c..47af8eab37b7509ca8e257e118c5b7e38ec8278a 100644 (file)
--- a/mpmc-queue/mpmc-queue.h
+++ b/mpmc-queue/mpmc-queue.h
@@ -34,7 +34,7 @@ public:
                        wr = rdwr & 0xFFFF;
 
                        if ( wr == rd ) // empty
-                               return false;
+                               return NULL;
 
                        if ( m_rdwr.compare_exchange_weak(rdwr,rdwr+(1<<16),mo_acq_rel) )
                                break;