From: Andrew Cooper <andrew.cooper3@citrix.com>
Date: Mon, 16 Mar 2015 13:29:49 +0000 (+0000)
Subject: tools/libxl: Introduce min and max macros
X-Git-Tag: 4.6.0-rc1~970
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=7057feebe117c64708aab054c5055e7a93341a0b;p=xen.git

tools/libxl: Introduce min and max macros

This is the same set used by libxc.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
CC: Ian Campbell <Ian.Campbell@citrix.com>
CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
---

diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 934465a87b..fcbec7f586 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -108,6 +108,22 @@
 
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
 
+#define min(X, Y) ({                             \
+            const typeof (X) _x = (X);           \
+            const typeof (Y) _y = (Y);           \
+            (void) (&_x == &_y);                 \
+            (_x < _y) ? _x : _y; })
+#define max(X, Y) ({                             \
+            const typeof (X) _x = (X);           \
+            const typeof (Y) _y = (Y);           \
+            (void) (&_x == &_y);                 \
+            (_x > _y) ? _x : _y; })
+
+#define min_t(type, x, y)                                               \
+    ({ const type _x = (x); const type _y = (y); _x < _y ? _x: _y; })
+#define max_t(type, x, y)                                               \
+    ({ const type _x = (x); const type _y = (y); _x > _y ? _x: _y; })
+
 #define LIBXL__LOGGING_ENABLED
 
 #ifdef LIBXL__LOGGING_ENABLED