move is_aligned() helper function into bertos/cfg/macros.h

[bertos.git] / bertos / cfg / macros.h

diff --git a/bertos/cfg/macros.h b/bertos/cfg/macros.h
index 0a721ac5a060f703d00a594ed9ab7cad25ae926e..17f9c6768d92db83972074b7ed26ba479f1c5451 100644 (file)
--- a/bertos/cfg/macros.h
+++ b/bertos/cfg/macros.h
@@ -192,8 +192,7 @@
 
 /**
  * Perform an integer division rounding the result to the upper int value.
- * \note \a divisor should preferibly be a costant, otherwise this macro generates
- * 2 division. Also divisor is evaluated twice.
+ * \note \a divisor is evaluated twice.
  */
 #define DIV_ROUNDUP(dividend, divisor)  (((dividend) + (divisor) - 1) / (divisor))
 
@@ -363,6 +362,14 @@
  */
 typedef uint32_t id_t;
 
+/**
+ * Check if a pointer is aligned to a certain power-of-2 size
+ */
+INLINE bool is_aligned(const void *addr, size_t size)
+{
+       return ((size_t)addr & (size - 1)) == 0;
+}
+
 /** \} */ //defgroup macros
 
 #endif /* MACROS_H */