Changeset 71f1cc1 in mainline

Timestamp:

2008-10-25T14:58:54Z (16 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

8d32152

Parents:

c947dda

Message:

Add the ROUND_UP() macro.

File:

• uspace/lib/libc/include/align.h (modified) (1 diff)

uspace/lib/libc/include/align.h

@@ -36 +36 @@
 #define LIBC_ALIGN_H_
 
-/** Align to the nearest lower address.
+/** Align to the nearest lower address which is a power of two.
  *
- * @param s Address or size to be aligned.
- * @param a Size of alignment, must be power of 2.
+ * @param s             Address or size to be aligned.
+ * @param a             Size of alignment, must be power of 2.
  */
 #define ALIGN_DOWN(s, a)        ((s) & ~((a) - 1))
 
 
-/** Align to the nearest higher address.
+/** Align to the nearest higher address which is a power of two.
  *
- * @param s Address or size to be aligned.
- * @param a Size of alignment, must be power of 2.
+ * @param s             Address or size to be aligned.
+ * @param a             Size of alignment, must be power of 2.
  */
 #define ALIGN_UP(s, a)          ((long)((s) + ((a) - 1)) & ~((long) (a) - 1))
+
+/** Round up to the nearest higher boundary.
+ *
+ * @param n             Number to be aligned.
+ * @param b             Boundary, arbitrary unsigned number.
+ */
+#define ROUND_UP(n, b)          (((n) / (b) + ((n) % (b) != 0)) * (b))
 
 #endif