From 6d29f0e40597d851738b1ceacef8116d1f7bd33a Mon Sep 17 00:00:00 2001
From: Pavel Kirienko <pavel.kirienko@gmail.com>
Date: Fri, 16 Oct 2015 15:50:33 +0300
Subject: [PATCH] UAVCAN_LIKELY(), UAVCAN_UNLIKELY()

---
 libuavcan/include/uavcan/build_config.hpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/libuavcan/include/uavcan/build_config.hpp b/libuavcan/include/uavcan/build_config.hpp
index fedea852b7..c1ee6dc1e0 100644
--- a/libuavcan/include/uavcan/build_config.hpp
+++ b/libuavcan/include/uavcan/build_config.hpp
@@ -167,6 +167,22 @@
 # endif
 #endif
 
+#ifndef UAVCAN_LIKELY
+# if __GNUC__
+#  define UAVCAN_LIKELY(x) __builtin_expect(!!(x), true)
+# else
+#  define UAVCAN_LIKELY(x) (x)
+# endif
+#endif
+
+#ifndef UAVCAN_UNLIKELY
+# if __GNUC__
+#  define UAVCAN_UNLIKELY(x) __builtin_expect(!!(x), false)
+# else
+#  define UAVCAN_UNLIKELY(x) (x)
+# endif
+#endif
+
 namespace uavcan
 {
 /**