The nxt_expect() macro.

2017-04-11 19:28:23 +03:00
parent 60ae0314c0
commit e0881fd85c
1 changed files with 10 additions and 2 deletions
--- a/src/nxt_clang.h
+++ b/src/nxt_clang.h
@@ -30,17 +30,25 @@ nxt_pragma_loop_disable_vectorization

 #if (NXT_HAVE_BUILTIN_EXPECT)

+#define                                                                       \
+nxt_expect(c, x)                                                              \
+    __builtin_expect((long) (x), (c))
+
 #define                                                                       \
 nxt_fast_path(x)                                                              \
-    __builtin_expect((long) (x), 1)
+    nxt_expect(1, x)

 #define                                                                       \
 nxt_slow_path(x)                                                              \
-    __builtin_expect((long) (x), 0)
+    nxt_expect(0, x)


 #else

+#define                                                                       \
+nxt_expect(c, x)                                                              \
+    (x)
+
 #define                                                                       \
 nxt_fast_path(x)                                                              \
    (x)