1 files changed, 31 insertions, 0 deletions
diff --git a/src/common/likely.h b/src/common/likely.h
new file mode 100644
index 000000000..abaf2d2e2
--- /dev/null
+++ b/src/common/likely.h
@@ -0,0 +1,31 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2010 Dreamhost
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#ifndef CEPH_LIKELY_DOT_H
+#define CEPH_LIKELY_DOT_H
+
+/*
+ * Likely / Unlikely macros
+ */
+#ifndef likely
+#define likely(x)       __builtin_expect((x),1)
+#endif
+#ifndef unlikely
+#define unlikely(x)     __builtin_expect((x),0)
+#endif
+#ifndef expect
+#define expect(x, hint) __builtin_expect((x),(hint))
+#endif
+
+#endif