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Annotation of sys/dev/raidframe/rf_sstf.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: rf_sstf.h,v 1.3 2002/12/16 07:01:05 tdeval Exp $      */
                      2: /*     $NetBSD: rf_sstf.h,v 1.3 1999/02/05 00:06:17 oster Exp $        */
                      3:
                      4: /*
                      5:  * Copyright (c) 1995 Carnegie-Mellon University.
                      6:  * All rights reserved.
                      7:  *
                      8:  * Author: Jim Zelenka
                      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: #ifndef        _RF__RF_SSTF_H_
                     32: #define        _RF__RF_SSTF_H_
                     33:
                     34: #include "rf_diskqueue.h"
                     35:
                     36: typedef struct RF_SstfQ_s {
                     37:        RF_DiskQueueData_t      *queue;
                     38:        RF_DiskQueueData_t      *qtail;
                     39:        int                      qlen;
                     40: } RF_SstfQ_t;
                     41:
                     42: typedef struct RF_Sstf_s {
                     43:        RF_SstfQ_t               left;
                     44:        RF_SstfQ_t               right;
                     45:        RF_SstfQ_t               lopri;
                     46:        RF_SectorNum_t           last_sector;
                     47:        int                      dir;
                     48:        int                      allow_reverse;
                     49: } RF_Sstf_t;
                     50:
                     51: void *rf_SstfCreate(RF_SectorCount_t, RF_AllocListElem_t *,
                     52:        RF_ShutdownList_t **);
                     53: void *rf_ScanCreate(RF_SectorCount_t, RF_AllocListElem_t *,
                     54:        RF_ShutdownList_t **);
                     55: void *rf_CscanCreate(RF_SectorCount_t, RF_AllocListElem_t *,
                     56:        RF_ShutdownList_t **);
                     57: void  rf_SstfEnqueue(void *, RF_DiskQueueData_t *, int);
                     58: RF_DiskQueueData_t *rf_SstfDequeue(void *);
                     59: RF_DiskQueueData_t *rf_SstfPeek(void *);
                     60: int   rf_SstfPromote(void *, RF_StripeNum_t, RF_ReconUnitNum_t);
                     61: RF_DiskQueueData_t *rf_ScanDequeue(void *);
                     62: RF_DiskQueueData_t *rf_ScanPeek(void *);
                     63: RF_DiskQueueData_t *rf_CscanDequeue(void *);
                     64: RF_DiskQueueData_t *rf_CscanPeek(void *);
                     65:
                     66: #endif /* !_RF__RF_SSTF_H_ */