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: stable/9/sys/sys/callout.h 235220 2012-05-10 10:02:56Z 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 #define CALLOUT_DFRMIGRATION 0x0040 /* callout in deferred migration mode */ 50 51 struct callout_handle { 52 struct callout *callout; 53 }; 54 55 #ifdef _KERNEL 56 extern int ncallout; 57 58 #define callout_active(c) ((c)->c_flags & CALLOUT_ACTIVE) 59 #define callout_deactivate(c) ((c)->c_flags &= ~CALLOUT_ACTIVE) 60 #define callout_drain(c) _callout_stop_safe(c, 1) 61 void callout_init(struct callout *, int); 62 void _callout_init_lock(struct callout *, struct lock_object *, int); 63 #define callout_init_mtx(c, mtx, flags) \ 64 _callout_init_lock((c), ((mtx) != NULL) ? &(mtx)->lock_object : \ 65 NULL, (flags)) 66 #define callout_init_rw(c, rw, flags) \ 67 _callout_init_lock((c), ((rw) != NULL) ? &(rw)->lock_object : \ 68 NULL, (flags)) 69 #define callout_pending(c) ((c)->c_flags & CALLOUT_PENDING) 70 int callout_reset_on(struct callout *, int, void (*)(void *), void *, int); 71 #define callout_reset(c, on_tick, fn, arg) \ 72 callout_reset_on((c), (on_tick), (fn), (arg), (c)->c_cpu) 73 #define callout_reset_curcpu(c, on_tick, fn, arg) \ 74 callout_reset_on((c), (on_tick), (fn), (arg), PCPU_GET(cpuid)) 75 int callout_schedule(struct callout *, int); 76 int callout_schedule_on(struct callout *, int, int); 77 #define callout_schedule_curcpu(c, on_tick) \ 78 callout_schedule_on((c), (on_tick), PCPU_GET(cpuid)) 79 #define callout_stop(c) _callout_stop_safe(c, 0) 80 int _callout_stop_safe(struct callout *, int); 81 void callout_tick(void); 82 int callout_tickstofirst(int limit); 83 extern void (*callout_new_inserted)(int cpu, int ticks); 84 85 #endif 86 87 #endif /* _SYS_CALLOUT_H_ */ 88