[unix-history] / usr / src / sys.386bsd / sys / rlist.h

/*
 * Copyright (c) 1992 William Jolitz. All rights reserved.
 * Written by William Jolitz 1/92
 *
 * Redistribution and use in source and binary forms are freely permitted
 * provided that the above copyright notice and attribution and date of work
 * and this paragraph are duplicated in all such forms.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Resource lists.
 *
 *	Usage:
 *		rlist_free(&swapmap, 100, 200);	add space to swapmap
 *		rlist_alloc(&swapmap, 100, &loc); obtain 100 sectors from swap
 * $Header: /usr/bill/working/sys/sys/RCS/rlist.h,v 1.2 92/01/21 21:23:48 william Exp $
 */

/* A resource list element. */
struct rlist {
	unsigned	rl_start;	/* boundaries of extent - inclusive */
	unsigned	rl_end;		/* boundaries of extent - inclusive */
	struct rlist	*rl_next;	/* next list entry, if present */
};

/* Functions to manipulate resource lists.  */
extern rlist_free __P((struct rlist **, unsigned, unsigned));
int rlist_alloc __P((struct rlist **, unsigned, unsigned *));
extern rlist_destroy __P((struct rlist **));


/* heads of lists */
struct rlist *swapmap;
Commit	Line	Data
0651014b WJ	1	/*
	2	* Copyright (c) 1992 William Jolitz. All rights reserved.
	3	* Written by William Jolitz 1/92
	4	*
	5	* Redistribution and use in source and binary forms are freely permitted
	6	* provided that the above copyright notice and attribution and date of work
	7	* and this paragraph are duplicated in all such forms.
	8	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	9	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	10	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	11	*
	12	* Resource lists.
	13	*
	14	* Usage:
	15	* rlist_free(&swapmap, 100, 200); add space to swapmap
	16	* rlist_alloc(&swapmap, 100, &loc); obtain 100 sectors from swap
	17	* $Header: /usr/bill/working/sys/sys/RCS/rlist.h,v 1.2 92/01/21 21:23:48 william Exp $
	18	*/
	19
	20	/* A resource list element. */
	21	struct rlist {
	22	unsigned rl_start; /* boundaries of extent - inclusive */
	23	unsigned rl_end; /* boundaries of extent - inclusive */
	24	struct rlist rl_next; / next list entry, if present */
	25	};
	26
	27	/* Functions to manipulate resource lists. */
	28	extern rlist_free __P((struct rlist **, unsigned, unsigned));
	29	int rlist_alloc __P((struct rlist *, unsigned, unsigned ));
	30	extern rlist_destroy __P((struct rlist **));
	31
	32
	33	/* heads of lists */
	34	struct rlist *swapmap;