svn commit: r236633 - stable/7/sys/sys

[Marius Strobl]

Author: marius
Date: Tue Jun  5 19:59:09 2012
New Revision: 236633
URL: http://svn.freebsd.org/changeset/base/236633

Log:
  MFC: r236486
  
  Add nitems(), a macro for determining the number of elements in a
  statically-allocated array.
  
  Obtained from:	OpenBSD (in principle)

Modified:
  stable/7/sys/sys/param.h
Directory Properties:
  stable/7/sys/   (props changed)
  stable/7/sys/cddl/contrib/opensolaris/   (props changed)
  stable/7/sys/contrib/dev/acpica/   (props changed)
  stable/7/sys/contrib/pf/   (props changed)

Modified: stable/7/sys/sys/param.h
==============================================================================
--- stable/7/sys/sys/param.h	Tue Jun  5 19:59:02 2012	(r236632)
+++ stable/7/sys/sys/param.h	Tue Jun  5 19:59:09 2012	(r236633)
@@ -249,6 +249,7 @@
 #ifndef howmany
 #define	howmany(x, y)	(((x)+((y)-1))/(y))
 #endif
+#define	nitems(x)	(sizeof((x)) / sizeof((x)[0]))
 #define	rounddown(x, y)	(((x)/(y))*(y))
 #define	roundup(x, y)	((((x)+((y)-1))/(y))*(y))  /* to any y */
 #define	roundup2(x, y)	(((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */