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