[a9153ec] | 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 | |
---|
[e599318] | 38 | #ifndef _SYS_CALLOUT_H_ |
---|
| 39 | #define _SYS_CALLOUT_H_ |
---|
[a9153ec] | 40 | |
---|
[e599318] | 41 | #include <sys/queue.h> |
---|
[a9153ec] | 42 | |
---|
| 43 | struct lock_object; |
---|
| 44 | |
---|
| 45 | SLIST_HEAD(callout_list, callout); |
---|
| 46 | TAILQ_HEAD(callout_tailq, callout); |
---|
| 47 | |
---|
| 48 | struct 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 */ |
---|
[af5333e] | 67 | #define CALLOUT_DFRMIGRATION 0x0040 /* callout in deferred migration mode */ |
---|
[a9153ec] | 68 | |
---|
| 69 | struct callout_handle { |
---|
| 70 | struct callout *callout; |
---|
| 71 | }; |
---|
| 72 | |
---|
| 73 | #ifdef _KERNEL |
---|
| 74 | extern 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) |
---|
| 79 | void callout_init(struct callout *, int); |
---|
| 80 | void _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) |
---|
| 88 | int 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)) |
---|
| 93 | int callout_schedule(struct callout *, int); |
---|
| 94 | int 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) |
---|
| 98 | int _callout_stop_safe(struct callout *, int); |
---|
| 99 | void callout_tick(void); |
---|
| 100 | |
---|
| 101 | |
---|
| 102 | #endif |
---|
| 103 | |
---|
[e599318] | 104 | #endif /* _SYS_CALLOUT_H_ */ |
---|