ed0e8f2fe9
- Fix these types in ULE as well. This fixes bugs in priority index calculations in certain edge cases. (int)-1 % 64 != (uint)-1 % 64. Reported by: kkenn using pho's stress2.
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/*-
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* Copyright (c) 2001 Jake Burkholder <jake@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _RUNQ_H_
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#define _RUNQ_H_
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#include <machine/runq.h>
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struct td_sched;
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/*
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* Run queue parameters.
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*/
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#define RQ_NQS (64) /* Number of run queues. */
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#define RQ_PPQ (4) /* Priorities per queue. */
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/*
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* Head of run queues.
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*/
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TAILQ_HEAD(rqhead, td_sched);
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/*
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* Bit array which maintains the status of a run queue. When a queue is
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* non-empty the bit corresponding to the queue number will be set.
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*/
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struct rqbits {
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rqb_word_t rqb_bits[RQB_LEN];
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};
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/*
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* Run queue structure. Contains an array of run queues on which processes
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* are placed, and a structure to maintain the status of each queue.
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*/
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struct runq {
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struct rqbits rq_status;
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struct rqhead rq_queues[RQ_NQS];
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};
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void runq_add(struct runq *, struct td_sched *, int);
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void runq_add_pri(struct runq *, struct td_sched *, u_char, int);
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int runq_check(struct runq *);
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struct td_sched *runq_choose(struct runq *);
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struct td_sched *runq_choose_from(struct runq *, u_char);
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void runq_init(struct runq *);
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void runq_remove(struct runq *, struct td_sched *);
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void runq_remove_idx(struct runq *, struct td_sched *, u_char *);
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#endif
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