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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_ */