From bded797f771daf80c03dd0eaf93c5cb463cf9256 Mon Sep 17 00:00:00 2001
From: Changpeng Liu <changpeng.liu@intel.com>
Date: Thu, 19 Dec 2019 01:00:55 -0500
Subject: [PATCH] util: add SPDK_ALIGN_FLOOR/CEIL macro definition

Change-Id: Ideb3a037a91b13432b8c0bd1271166067caf69c4
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/478409
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
---
 include/spdk/util.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/include/spdk/util.h b/include/spdk/util.h
index 993d10ac1..41734e46e 100644
--- a/include/spdk/util.h
+++ b/include/spdk/util.h
@@ -59,6 +59,23 @@ extern "C" {
 /* Ceiling division of unsigned integers */
 #define SPDK_CEIL_DIV(x,y) (((x)+(y)-1)/(y))
 
+/**
+ * Macro to align a value to a given power-of-two. The resultant value
+ * will be of the same type as the first parameter, and will be no
+ * bigger than the first parameter. Second parameter must be a
+ * power-of-two value.
+ */
+#define SPDK_ALIGN_FLOOR(val, align) \
+	(typeof(val))((val) & (~((typeof(val))((align) - 1))))
+/**
+ * Macro to align a value to a given power-of-two. The resultant value
+ * will be of the same type as the first parameter, and will be no lower
+ * than the first parameter. Second parameter must be a power-of-two
+ * value.
+ */
+#define SPDK_ALIGN_CEIL(val, align) \
+	SPDK_ALIGN_FLOOR(((val) + ((typeof(val)) (align) - 1)), align)
+
 uint32_t spdk_u32log2(uint32_t x);
 
 static inline uint32_t