Annotation of prex/sys/include/sched.h, Revision 1.1
1.1 ! nbrk 1: /*-
! 2: * Copyright (c) 2005-2007, Kohsuke Ohtani
! 3: * All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the author nor the names of any co-contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #ifndef _SCHED_H
! 31: #define _SCHED_H
! 32:
! 33: #include <event.h>
! 34: #include <thread.h>
! 35:
! 36: /*
! 37: * Scheduling policies defined by IEEE Std 1003.1-2001
! 38: */
! 39: #define SCHED_FIFO 0 /* First in-first out */
! 40: #define SCHED_RR 1 /* Round robin */
! 41: #define SCHED_OTHER 2 /* Another scheduling policy */
! 42:
! 43: /*
! 44: * Scheduling quantum (Ticks for context switch)
! 45: */
! 46: #define QUANTUM (CONFIG_TIME_SLICE * HZ / 1000)
! 47:
! 48: /*
! 49: * DPC (Deferred Procedure Call) object
! 50: */
! 51: struct dpc {
! 52: struct queue link; /* Linkage on DPC queue */
! 53: int state;
! 54: void (*func)(void *); /* Callback routine */
! 55: void *arg; /* Argument to pass */
! 56: };
! 57:
! 58: /* state for DPC */
! 59: #define DPC_FREE 0x4470463f /* 'DpF?' */
! 60: #define DPC_PENDING 0x4470503f /* 'DpP?' */
! 61:
! 62: #define sched_sleep(evt) sched_tsleep((evt), 0)
! 63:
! 64: extern int sched_tsleep(struct event *, u_long);
! 65: extern void sched_wakeup(struct event *);
! 66: extern thread_t sched_wakeone(struct event *);
! 67: extern void sched_unsleep(thread_t, int);
! 68: extern void sched_yield(void);
! 69: extern void sched_suspend(thread_t);
! 70: extern void sched_resume(thread_t);
! 71: extern void sched_tick(void);
! 72: extern void sched_start(thread_t);
! 73: extern void sched_stop(thread_t);
! 74: extern void sched_lock(void);
! 75: extern void sched_unlock(void);
! 76: extern int sched_getprio(thread_t);
! 77: extern void sched_setprio(thread_t, int, int);
! 78: extern int sched_getpolicy(thread_t);
! 79: extern int sched_setpolicy(thread_t, int);
! 80: extern void sched_dpc(struct dpc *, void (*)(void *), void *);
! 81: extern void sched_init(void);
! 82:
! 83: #endif /* !_SCHED_H */
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