1 /* $NetBSD: rf_fifo.h,v 1.7 2021/07/23 20:18:24 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 int 58 rf_FifoPromote(void *q_in, RF_StripeNum_t parityStripeID, 59 RF_ReconUnitNum_t which_ru); 60 61 #endif /* !_RF__RF_FIFO_H_ */ 62