1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/* $OpenBSD: rf_fifo.h,v 1.3 2002/12/16 07:01:04 tdeval Exp $ */
/* $NetBSD: rf_fifo.h,v 1.3 1999/02/05 00:06:11 oster Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Mark Holland
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*
* rf_fifo.h -- prioritized FIFO queue code.
*
* 4-9-93 Created (MCH)
*/
#ifndef _RF__RF_FIFO_H_
#define _RF__RF_FIFO_H_
#include "rf_archs.h"
#include "rf_types.h"
#include "rf_diskqueue.h"
typedef struct RF_FifoHeader_s {
RF_DiskQueueData_t *hq_head, *hq_tail; /* high priority requests */
RF_DiskQueueData_t *lq_head, *lq_tail; /* low priority requests */
int hq_count, lq_count; /* debug only */
} RF_FifoHeader_t;
extern void *rf_FifoCreate(RF_SectorCount_t, RF_AllocListElem_t *,
RF_ShutdownList_t **);
extern void rf_FifoEnqueue(void *, RF_DiskQueueData_t *, int);
extern RF_DiskQueueData_t *rf_FifoDequeue(void *);
extern RF_DiskQueueData_t *rf_FifoPeek(void *);
extern int rf_FifoPromote(void *, RF_StripeNum_t, RF_ReconUnitNum_t);
#endif /* !_RF__RF_FIFO_H_ */
|
