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/* $OpenBSD: rf_fifo.h,v 1.2 1999/02/16 00:02:46 niklas 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 sectPerDisk,
RF_AllocListElem_t * clList, RF_ShutdownList_t ** listp);
extern void
rf_FifoEnqueue(void *q_in, RF_DiskQueueData_t * elem,
int priority);
extern RF_DiskQueueData_t *rf_FifoDequeue(void *q_in);
extern RF_DiskQueueData_t *rf_FifoPeek(void *q_in);
extern int
rf_FifoPromote(void *q_in, RF_StripeNum_t parityStripeID,
RF_ReconUnitNum_t which_ru);
#endif /* !_RF__RF_FIFO_H_ */
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