[rtdef] RT_IS_ALIGN marco add a null address exclusive

780806fe · 哈哈哈可是开电脑 · mysterywolf · e36b97ff · 780806fe
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include/rtdef.h include/rtdef.h +2 -1

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--- a/include/rtdef.h
+++ b/include/rtdef.h
@@ -393,8 +393,9 @@ typedef int (*init_fn_t)(void);
 * Return true(1) or false(0).
 *     RT_IS_ALIGN(128, 4) is judging whether 128 aligns with 4.
 *     The result is 1, which means 128 aligns with 4.
+ * @note If the address is NULL, false(0) will be returned
 */
-#define RT_IS_ALIGN(addr, align) (!(addr & (align - 1)))
+#define RT_IS_ALIGN(addr, align) ((!(addr & (align - 1))) && (addr != RT_NULL))

 /**
 * @ingroup BasicDef