util: Introduce macros to tell the compiler how likely branches are

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/pakfire/util.h b/src/pakfire/util.h
index c3c9f00e1228ab04a07103f07126160d904538fb..8de8827d033afbc1b867db5658e8905a9225e744 100644 (file)
--- a/src/pakfire/util.h
+++ b/src/pakfire/util.h
@@ -28,6 +28,10 @@
 
 #include <pakfire/ctx.h>
 
+// Macros to help the compiler with branch prediction
+#define likely(x)              __builtin_expect(!!(x), 1)
+#define unlikely(x)            __builtin_expect(!!(x), 0)
+
 /*
        This implementation of realloc frees the original buffer
        if it could not be resized.