rf_fifo.h

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    1 /*      $NetBSD: rf_fifo.h,v 1.4 2001/10/04 15:58:53 oster Exp $        */
    2 /*
    3  * Copyright (c) 1995 Carnegie-Mellon University.
    4  * All rights reserved.
    5  *
    6  * Author: Mark Holland
    7  *
    8  * Permission to use, copy, modify and distribute this software and
    9  * its documentation is hereby granted, provided that both the copyright
   10  * notice and this permission notice appear in all copies of the
   11  * software, derivative works or modified versions, and any portions
   12  * thereof, and that both notices appear in supporting documentation.
   13  *
   14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
   16  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   17  *
   18  * Carnegie Mellon requests users of this software to return to
   19  *
   20  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   21  *  School of Computer Science
   22  *  Carnegie Mellon University
   23  *  Pittsburgh PA 15213-3890
   24  *
   25  * any improvements or extensions that they make and grant Carnegie the
   26  * rights to redistribute these changes.
   27  */
   28 
   29 /*
   30  * rf_fifo.h --  prioritized FIFO queue code.
   31  *
   32  * 4-9-93 Created (MCH)
   33  */
   34 
   35 
   36 #ifndef _RF__RF_FIFO_H_
   37 #define _RF__RF_FIFO_H_
   38 
   39 #include <dev/raidframe/raidframevar.h>
   40 
   41 #include "rf_archs.h"
   42 #include "rf_diskqueue.h"
   43 
   44 typedef struct RF_FifoHeader_s {
   45         RF_DiskQueueData_t *hq_head, *hq_tail;  /* high priority requests */
   46         RF_DiskQueueData_t *lq_head, *lq_tail;  /* low priority requests */
   47         int     hq_count, lq_count;     /* debug only */
   48 }       RF_FifoHeader_t;
   49 
   50 extern void *
   51 rf_FifoCreate(RF_SectorCount_t sectPerDisk,
   52     RF_AllocListElem_t * clList, RF_ShutdownList_t ** listp);
   53 extern void 
   54 rf_FifoEnqueue(void *q_in, RF_DiskQueueData_t * elem,
   55     int priority);
   56 extern RF_DiskQueueData_t *rf_FifoDequeue(void *q_in);
   57 extern RF_DiskQueueData_t *rf_FifoPeek(void *q_in);
   58 extern int 
   59 rf_FifoPromote(void *q_in, RF_StripeNum_t parityStripeID,
   60     RF_ReconUnitNum_t which_ru);
   61 
   62 #endif                          /* !_RF__RF_FIFO_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/raidframe/rf_fifo.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/raidframe/rf_fifo.h