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/*
* 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 MERCHANTABILITY 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
*
* from: unknown?
* $Id: rlist.h,v 1.11 1997/02/22 09:45:47 peter Exp $
*/
#ifndef _SYS_RLIST_H_
#define _SYS_RLIST_H_
/* 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 */
};
struct rlisthdr {
int rlh_lock; /* list lock */
struct rlist *rlh_list; /* list itself */
};
#define RLH_DESIRED 0x2
#define RLH_LOCKED 0x1
/* extern struct rlisthdr swaplist; */
/* Functions to manipulate resource lists. */
extern void rlist_free __P((struct rlisthdr *, unsigned, unsigned));
int rlist_alloc __P((struct rlisthdr *, unsigned, unsigned *));
extern void rlist_destroy __P((struct rlisthdr *));
#endif /* _SYS_RLIST_H_ */