48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
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* Copyright (c) 1992 William Jolitz. All rights reserved.
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* Written by William Jolitz 1/92
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*
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* Redistribution and use in source and binary forms are freely permitted
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* provided that the above copyright notice and attribution and date of work
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* and this paragraph are duplicated in all such forms.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Resource lists.
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*
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* Usage:
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* rlist_free(&swapmap, 100, 200); add space to swapmap
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* rlist_alloc(&swapmap, 100, &loc); obtain 100 sectors from swap
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*
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* from: unknown?
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* $Id$
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*/
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#ifndef _SYS_RLIST_H_
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#define _SYS_RLIST_H_
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/* A resource list element. */
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struct rlist {
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unsigned rl_start; /* boundaries of extent - inclusive */
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unsigned rl_end; /* boundaries of extent - inclusive */
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struct rlist *rl_next; /* next list entry, if present */
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};
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struct rlisthdr {
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int rlh_lock; /* list lock */
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struct rlist *rlh_list; /* list itself */
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};
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#define RLH_DESIRED 0x2
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#define RLH_LOCKED 0x1
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/* extern struct rlisthdr swaplist; */
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/* Functions to manipulate resource lists. */
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extern void rlist_free __P((struct rlisthdr *, unsigned, unsigned));
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int rlist_alloc __P((struct rlisthdr *, unsigned, unsigned *));
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extern void rlist_destroy __P((struct rlisthdr *));
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#endif /* _SYS_RLIST_H_ */
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