From: Valentin Bartenev <vbart@nginx.com>
Date: Mon, 19 Dec 2016 11:19:43 +0000 (+0300)
Subject: The nxt_expect() macro.
X-Git-Tag: 0.1.7~3
X-Git-Url: http://git.kaiwu.me/postgresql/log/contrib/postgres_fdw/static/gitweb.js?a=commitdiff_plain;h=fff3a7ed15cd653ac76e6105ecb3180d871463a3;p=njs.git

The nxt_expect() macro.
---

diff --git a/nxt/nxt_clang.h b/nxt/nxt_clang.h
index aeadb117..32737201 100644
--- a/nxt/nxt_clang.h
+++ b/nxt/nxt_clang.h
@@ -27,10 +27,12 @@
 
 
 #if (NXT_HAVE_BUILTIN_EXPECT)
-#define nxt_fast_path(x)   __builtin_expect((long) (x), 1)
-#define nxt_slow_path(x)   __builtin_expect((long) (x), 0)
+#define nxt_expect(c, x)   __builtin_expect((long) (x), (c))
+#define nxt_fast_path(x)   nxt_expect(1, x)
+#define nxt_slow_path(x)   nxt_expect(0, x)
 
 #else
+#define nxt_expect(c, x)   (x)
 #define nxt_fast_path(x)   (x)
 #define nxt_slow_path(x)   (x)
 #endif