| | 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 | * 3. All advertising materials mentioning features or use of this software |
| | 19 | * must display the following acknowledgement: |
| | 20 | * This product includes software developed by the University of |
| | 21 | * California, Berkeley and its contributors. |
| | 22 | * 4. Neither the name of the University nor the names of its contributors |
| | 23 | * may be used to endorse or promote products derived from this software |
| | 24 | * without specific prior written permission. |
| | 25 | * |
| | 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 36 | * SUCH DAMAGE. |
| | 37 | * |
| | 38 | * @(#)callout.h 8.2 (Berkeley) 1/21/94 |
| | 39 | * $FreeBSD: src/sys/sys/callout.h,v 1.15.2.1 2001/11/13 18:24:52 archie Exp $ |
| | 40 | */ |
| | 41 | |
| | 42 | #ifndef _SYS_CALLOUT_H_ |
| | 43 | #define _SYS_CALLOUT_H_ |
| | 44 | |
| | 45 | #include <sys/queue.h> |
| | 46 | |
| | 47 | SLIST_HEAD(callout_list, callout); |
| | 48 | TAILQ_HEAD(callout_tailq, callout); |
| | 49 | |
| | 50 | struct callout { |
| | 51 | union { |
| | 52 | SLIST_ENTRY(callout) sle; |
| | 53 | TAILQ_ENTRY(callout) tqe; |
| | 54 | } c_links; |
| | 55 | int c_time; /* ticks to the event */ |
| | 56 | void *c_arg; /* function argument */ |
| | 57 | void (*c_func) __P((void *)); /* function to call */ |
| | 58 | int c_flags; /* state of this entry */ |
| | 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 | |
| | 65 | struct callout_handle { |
| | 66 | struct callout *callout; |
| | 67 | }; |
| | 68 | |
| | 69 | #ifdef _KERNEL |
| | 70 | extern struct callout_list callfree; |
| | 71 | extern struct callout *callout; |
| | 72 | extern int ncallout; |
| | 73 | extern struct callout_tailq *callwheel; |
| | 74 | extern int callwheelsize, callwheelbits, callwheelmask, softticks; |
| | 75 | |
| | 76 | #define callout_active(c) ((c)->c_flags & CALLOUT_ACTIVE) |
| | 77 | #define callout_deactivate(c) ((c)->c_flags &= ~CALLOUT_ACTIVE) |
| | 78 | void callout_init __P((struct callout *)); |
| | 79 | #define callout_pending(c) ((c)->c_flags & CALLOUT_PENDING) |
| | 80 | void callout_reset __P((struct callout *, int, void (*)(void *), void *)); |
| | 81 | int callout_stop __P((struct callout *)); |
| | 82 | |
| | 83 | #endif |
| | 84 | |
| | 85 | #endif /* _SYS_CALLOUT_H_ */ |
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