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commit cf0769d6135dafdd7ed25e315b68c7005dfe808e
Author: chao an <anc...@xiaomi.com>
AuthorDate: Thu Feb 2 20:30:31 2023 +0800
include: Add nitems() definition to sys/param.h
Signed-off-by: chao an <anc...@xiaomi.com>
---
include/sys/param.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/sys/param.h b/include/sys/param.h
index 4e94f51bbc..831a552eae 100644
--- a/include/sys/param.h
+++ b/include/sys/param.h
@@ -43,6 +43,14 @@
# define MAX(a,b) (((a) > (b)) ? (a) : (b))
#endif /* MAX */
+/* Macros for number of items.
+ * (aka. ARRAY_SIZE, ArraySize, Size of an Array)
+ */
+
+#ifndef nitems
+# define nitems(_a) (sizeof(_a) / sizeof(0[(_a)]))
+#endif /* nitems */
+
/****************************************************************************
* Public Type Definitions
****************************************************************************/
