FreeBSD/Linux Kernel Cross Reference
sys/sys/_callout.h

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 1990, 1993
      *      The Regents of the University of California.  All rights reserved.
      * (c) UNIX System Laboratories, Inc.
      * All or some portions of this file are derived from material licensed
      * to the University of California by American Telephone and Telegraph
      * Co. or Unix System Laboratories, Inc. and are reproduced herein with
     * the permission of UNIX System Laboratories, Inc.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)callout.h   8.2 (Berkeley) 1/21/94
     * $FreeBSD$
     */
    
    #ifndef _SYS__CALLOUT_H
    #define _SYS__CALLOUT_H
    
    #include <sys/_types.h>
    #include <sys/queue.h>
    
    struct lock_object;
    
    LIST_HEAD(callout_list, callout);
    SLIST_HEAD(callout_slist, callout);
    TAILQ_HEAD(callout_tailq, callout);
    
    typedef void callout_func_t(void *);
    
    struct callout {
            union {
                    LIST_ENTRY(callout) le;
                    SLIST_ENTRY(callout) sle;
                    TAILQ_ENTRY(callout) tqe;
            } c_links;
            __sbintime_t c_time;                    /* ticks to the event */
            __sbintime_t c_precision;               /* delta allowed wrt opt */
            void    *c_arg;                         /* function argument */
            callout_func_t *c_func;                 /* function to call */
            struct lock_object *c_lock;             /* lock to handle */
            short   c_flags;                        /* User State */
            short   c_iflags;                       /* Internal State */
            volatile int c_cpu;                     /* CPU we're scheduled on */
    };
    
    #endif

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