62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/* $NetBSD: rf_fifo.h,v 1.3 1999/02/05 00:06:11 oster Exp $ */
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Mark Holland
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* rf_fifo.h -- prioritized FIFO queue code.
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*
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* 4-9-93 Created (MCH)
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*/
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#ifndef _RF__RF_FIFO_H_
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#define _RF__RF_FIFO_H_
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#include "rf_archs.h"
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#include "rf_types.h"
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#include "rf_diskqueue.h"
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typedef struct RF_FifoHeader_s {
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RF_DiskQueueData_t *hq_head, *hq_tail; /* high priority requests */
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RF_DiskQueueData_t *lq_head, *lq_tail; /* low priority requests */
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int hq_count, lq_count; /* debug only */
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} RF_FifoHeader_t;
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extern void *
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rf_FifoCreate(RF_SectorCount_t sectPerDisk,
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RF_AllocListElem_t * clList, RF_ShutdownList_t ** listp);
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extern void
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rf_FifoEnqueue(void *q_in, RF_DiskQueueData_t * elem,
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int priority);
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extern RF_DiskQueueData_t *rf_FifoDequeue(void *q_in);
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extern RF_DiskQueueData_t *rf_FifoPeek(void *q_in);
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extern int
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rf_FifoPromote(void *q_in, RF_StripeNum_t parityStripeID,
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RF_ReconUnitNum_t which_ru);
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#endif /* !_RF__RF_FIFO_H_ */
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