source: rtems-libbsd/freebsd/sys/sys/callout.h @ af5333e

4.115-freebsd-12freebsd-9.3
Last change on this file since af5333e was af5333e, checked in by Sebastian Huber <sebastian.huber@…>, on Nov 4, 2013 at 10:33:00 AM

Update to FreeBSD 8.4

  • Property mode set to 100644
File size: 4.3 KB
Line 
1/*-
2 * Copyright (c) 1990, 1993
3 *      The Regents of the University of California.  All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *      @(#)callout.h   8.2 (Berkeley) 1/21/94
35 * $FreeBSD$
36 */
37
38#ifndef _SYS_CALLOUT_H_
39#define _SYS_CALLOUT_H_
40
41#include <sys/queue.h>
42
43struct lock_object;
44
45SLIST_HEAD(callout_list, callout);
46TAILQ_HEAD(callout_tailq, callout);
47
48struct callout {
49        union {
50                SLIST_ENTRY(callout) sle;
51                TAILQ_ENTRY(callout) tqe;
52        } c_links;
53        int     c_time;                         /* ticks to the event */
54        void    *c_arg;                         /* function argument */
55        void    (*c_func)(void *);              /* function to call */
56        struct lock_object *c_lock;             /* lock to handle */
57        int     c_flags;                        /* state of this entry */
58        volatile int c_cpu;                     /* CPU we're scheduled on */
59};
60
61#define CALLOUT_LOCAL_ALLOC     0x0001 /* was allocated from callfree */
62#define CALLOUT_ACTIVE          0x0002 /* callout is currently active */
63#define CALLOUT_PENDING         0x0004 /* callout is waiting for timeout */
64#define CALLOUT_MPSAFE          0x0008 /* callout handler is mp safe */
65#define CALLOUT_RETURNUNLOCKED  0x0010 /* handler returns with mtx unlocked */
66#define CALLOUT_SHAREDLOCK      0x0020 /* callout lock held in shared mode */
67#define CALLOUT_DFRMIGRATION    0x0040 /* callout in deferred migration mode */
68
69struct callout_handle {
70        struct callout *callout;
71};
72
73#ifdef _KERNEL
74extern int ncallout;
75
76#define callout_active(c)       ((c)->c_flags & CALLOUT_ACTIVE)
77#define callout_deactivate(c)   ((c)->c_flags &= ~CALLOUT_ACTIVE)
78#define callout_drain(c)        _callout_stop_safe(c, 1)
79void    callout_init(struct callout *, int);
80void    _callout_init_lock(struct callout *, struct lock_object *, int);
81#define callout_init_mtx(c, mtx, flags)                                 \
82        _callout_init_lock((c), ((mtx) != NULL) ? &(mtx)->lock_object : \
83            NULL, (flags))
84#define callout_init_rw(c, rw, flags)                                   \
85        _callout_init_lock((c), ((rw) != NULL) ? &(rw)->lock_object :   \
86           NULL, (flags))
87#define callout_pending(c)      ((c)->c_flags & CALLOUT_PENDING)
88int     callout_reset_on(struct callout *, int, void (*)(void *), void *, int);
89#define callout_reset(c, on_tick, fn, arg)                              \
90    callout_reset_on((c), (on_tick), (fn), (arg), (c)->c_cpu)
91#define callout_reset_curcpu(c, on_tick, fn, arg)                       \
92    callout_reset_on((c), (on_tick), (fn), (arg), PCPU_GET(cpuid))
93int     callout_schedule(struct callout *, int);
94int     callout_schedule_on(struct callout *, int, int);
95#define callout_schedule_curcpu(c, on_tick)                             \
96    callout_schedule_on((c), (on_tick), PCPU_GET(cpuid))
97#define callout_stop(c)         _callout_stop_safe(c, 0)
98int     _callout_stop_safe(struct callout *, int);
99void    callout_tick(void);
100
101
102#endif
103
104#endif /* _SYS_CALLOUT_H_ */
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