fixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmocore/+/27046 )

Change subject: core/utils.h: add OSMO_LIKELY / OSMO_UNLIKELY macros ......................................................................

core/utils.h: add OSMO_LIKELY / OSMO_UNLIKELY macros

Change-Id: I0b029654ba050f079eed4a0574a3fa8019677067 --- M include/osmocom/core/utils.h 1 file changed, 9 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/46/27046/1

diff --git a/include/osmocom/core/utils.h b/include/osmocom/core/utils.h index 327aa3d..30d8be6 100644 --- a/include/osmocom/core/utils.h +++ b/include/osmocom/core/utils.h @@ -38,6 +38,15 @@ /*! Copy a C-string into a sized buffer using sizeof to detect buffer's size */ #define OSMO_STRLCPY_ARRAY(array, src) osmo_strlcpy(array, src, sizeof(array))

+/*! Branch prediction optimizations */ +#if defined(__GNUC__) +#define OSMO_LIKELY(exp) __builtin_expect (!!(exp), 1) +#define OSMO_UNLIKELY(exp) __builtin_expect (!!(exp), 0) +#else +#define OSMO_LIKELY(exp) exp +#define OSMO_UNLIKELY(exp) exp +#endif + /*! A mapping between human-readable string and numeric value */ struct value_string { uint32_t value; /*!< numeric value */