usr/src/bin/sh/machdep.h

/*-
 * Copyright (c) 1991, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)machdep.h   8.2 (Berkeley) %G%
 */

/*
 * Most machines require the value returned from malloc to be aligned
 * in some way.  The following macro will get this right on many machines.
 */

#ifndef ALIGN
union align {
        int i;
        char *cp;
};

#define ALIGN(nbytes)   (((nbytes) + sizeof(union align) - 1) & ~(sizeof(union align) - 1))
#endif