[unix-history] / 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	8.1 (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
Commit	Line	Data
c7a755e7	1	/*-
d1b73048 KB	2	* Copyright (c) 1991, 1993
d1b73048 KB	3	* The Regents of the University of California. All rights reserved.
c7a755e7 KB	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Kenneth Almquist.
	7	*
	8	* %sccs.include.redist.c%
	9	*
d1b73048	10	* @(#)machdep.h 8.1 (Berkeley) %G%
c7a755e7 KB	11	*/
	12
	13	/*
	14	* Most machines require the value returned from malloc to be aligned
	15	* in some way. The following macro will get this right on many machines.
	16	*/
	17
	18	#ifndef ALIGN
	19	union align {
	20	int i;
	21	char *cp;
	22	};
	23
	24	#define ALIGN(nbytes) ((nbytes) + sizeof(union align) - 1 &~ (sizeof(union align) - 1))
	25	#endif