diff options
Diffstat (limited to 'lib/isc/include/isc/util.h')
| -rw-r--r-- | lib/isc/include/isc/util.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/lib/isc/include/isc/util.h b/lib/isc/include/isc/util.h index 6baf786bdeab..fc2e1882641a 100644 --- a/lib/isc/include/isc/util.h +++ b/lib/isc/include/isc/util.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2004-2007, 2010-2012, 2015 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 2004-2007, 2010-2012, 2015, 2016 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 1998-2001 Internet Software Consortium. * * Permission to use, copy, modify, and/or distribute this software for any @@ -206,6 +206,17 @@ #define INSERTAFTER(li, a, e, ln) ISC_LIST_INSERTAFTER(li, a, e, ln) #define APPENDLIST(list1, list2, link) ISC_LIST_APPENDLIST(list1, list2, link) +/*% + * Performance + */ +#ifdef HAVE_BUILTIN_EXPECT +#define ISC_LIKELY(x) __builtin_expect(!!(x), 1) +#define ISC_UNLIKELY(x) __builtin_expect(!!(x), 0) +#else +#define ISC_LIKELY(x) (x) +#define ISC_UNLIKELY(x) (x) +#endif + /* * Assertions */ |