From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Thu, 18 Feb 2021 10:23:30 +0000 (+0100)
Subject: macro: add swap helper
X-Git-Tag: lxc-5.0.0~278^2~18
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a38a34f88884c62b4077a34e468965f9b18e9b1b;p=thirdparty%2Flxc.git

macro: add swap helper

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/macro.h b/src/lxc/macro.h
index 9e74078f4..f6ac8c45f 100644
--- a/src/lxc/macro.h
+++ b/src/lxc/macro.h
@@ -694,4 +694,11 @@ enum {
 
 #define MAX_FILENO ~0U
 
+#define swap(a, b)                     \
+	do {                           \
+		typeof(a) __tmp = (a); \
+		(a) = (b);             \
+		(b) = __tmp;           \
+	} while (0)
+
 #endif /* __LXC_MACRO_H */