callout.h revision 50673
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: head/sys/sys/callout.h 50673 1999-08-30 21:17:07Z jlemon $ 40 */ 41 42#ifndef _SYS_CALLOUT_H_ 43#define _SYS_CALLOUT_H_ 44 45#include <sys/queue.h> 46 47SLIST_HEAD(callout_list, callout); 48TAILQ_HEAD(callout_tailq, callout); 49 50struct 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 65struct callout_handle { 66 struct callout *callout; 67}; 68 69#ifdef KERNEL 70extern struct callout_list callfree; 71extern struct callout *callout; 72extern int ncallout; 73extern struct callout_tailq *callwheel; 74extern 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) 78void callout_init __P((struct callout *)); 79#define callout_pending(c) ((c)->c_flags & CALLOUT_PENDING) 80void callout_reset __P((struct callout *, int, void (*)(void *), void *)); 81void callout_stop __P((struct callout *)); 82 83#endif /* KERNEL */ 84 85#endif /* _SYS_CALLOUT_H_ */ 86