callout.h revision 221059
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: head/sys/sys/callout.h 221059 2011-04-26 11:39:56Z kib $ 36 */ 37 38#ifndef _SYS_CALLOUT_H_ 39#define _SYS_CALLOUT_H_ 40 41#include <sys/_callout.h> 42 43#define CALLOUT_LOCAL_ALLOC 0x0001 /* was allocated from callfree */ 44#define CALLOUT_ACTIVE 0x0002 /* callout is currently active */ 45#define CALLOUT_PENDING 0x0004 /* callout is waiting for timeout */ 46#define CALLOUT_MPSAFE 0x0008 /* callout handler is mp safe */ 47#define CALLOUT_RETURNUNLOCKED 0x0010 /* handler returns with mtx unlocked */ 48#define CALLOUT_SHAREDLOCK 0x0020 /* callout lock held in shared mode */ 49 50struct callout_handle { 51 struct callout *callout; 52}; 53 54#ifdef _KERNEL 55extern int ncallout; 56 57#define callout_active(c) ((c)->c_flags & CALLOUT_ACTIVE) 58#define callout_deactivate(c) ((c)->c_flags &= ~CALLOUT_ACTIVE) 59#define callout_drain(c) _callout_stop_safe(c, 1) 60void callout_init(struct callout *, int); 61void _callout_init_lock(struct callout *, struct lock_object *, int); 62#define callout_init_mtx(c, mtx, flags) \ 63 _callout_init_lock((c), ((mtx) != NULL) ? &(mtx)->lock_object : \ 64 NULL, (flags)) 65#define callout_init_rw(c, rw, flags) \ 66 _callout_init_lock((c), ((rw) != NULL) ? &(rw)->lock_object : \ 67 NULL, (flags)) 68#define callout_pending(c) ((c)->c_flags & CALLOUT_PENDING) 69int callout_reset_on(struct callout *, int, void (*)(void *), void *, int); 70#define callout_reset(c, on_tick, fn, arg) \ 71 callout_reset_on((c), (on_tick), (fn), (arg), (c)->c_cpu) 72#define callout_reset_curcpu(c, on_tick, fn, arg) \ 73 callout_reset_on((c), (on_tick), (fn), (arg), PCPU_GET(cpuid)) 74int callout_schedule(struct callout *, int); 75int callout_schedule_on(struct callout *, int, int); 76#define callout_schedule_curcpu(c, on_tick) \ 77 callout_schedule_on((c), (on_tick), PCPU_GET(cpuid)) 78#define callout_stop(c) _callout_stop_safe(c, 0) 79int _callout_stop_safe(struct callout *, int); 80void callout_tick(void); 81int callout_tickstofirst(int limit); 82extern void (*callout_new_inserted)(int cpu, int ticks); 83 84#endif 85 86#endif /* _SYS_CALLOUT_H_ */ 87