Annotation of sys/dev/raidframe/rf_fifo.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: rf_fifo.h,v 1.3 2002/12/16 07:01:04 tdeval Exp $ */
2: /* $NetBSD: rf_fifo.h,v 1.3 1999/02/05 00:06:11 oster Exp $ */
3:
4: /*
5: * Copyright (c) 1995 Carnegie-Mellon University.
6: * All rights reserved.
7: *
8: * Author: Mark Holland
9: *
10: * Permission to use, copy, modify and distribute this software and
11: * its documentation is hereby granted, provided that both the copyright
12: * notice and this permission notice appear in all copies of the
13: * software, derivative works or modified versions, and any portions
14: * thereof, and that both notices appear in supporting documentation.
15: *
16: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
18: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19: *
20: * Carnegie Mellon requests users of this software to return to
21: *
22: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
23: * School of Computer Science
24: * Carnegie Mellon University
25: * Pittsburgh PA 15213-3890
26: *
27: * any improvements or extensions that they make and grant Carnegie the
28: * rights to redistribute these changes.
29: */
30:
31: /*
32: * rf_fifo.h -- prioritized FIFO queue code.
33: *
34: * 4-9-93 Created (MCH)
35: */
36:
37:
38: #ifndef _RF__RF_FIFO_H_
39: #define _RF__RF_FIFO_H_
40:
41: #include "rf_archs.h"
42: #include "rf_types.h"
43: #include "rf_diskqueue.h"
44:
45: typedef struct RF_FifoHeader_s {
46: RF_DiskQueueData_t *hq_head, *hq_tail; /* high priority requests */
47: RF_DiskQueueData_t *lq_head, *lq_tail; /* low priority requests */
48: int hq_count, lq_count; /* debug only */
49: } RF_FifoHeader_t;
50:
51: extern void *rf_FifoCreate(RF_SectorCount_t, RF_AllocListElem_t *,
52: RF_ShutdownList_t **);
53: extern void rf_FifoEnqueue(void *, RF_DiskQueueData_t *, int);
54: extern RF_DiskQueueData_t *rf_FifoDequeue(void *);
55: extern RF_DiskQueueData_t *rf_FifoPeek(void *);
56: extern int rf_FifoPromote(void *, RF_StripeNum_t, RF_ReconUnitNum_t);
57:
58: #endif /* !_RF__RF_FIFO_H_ */
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