_task.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2000 Doug Rabson
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD$
   29  */
   30 
   31 #ifndef _SYS__TASK_H_
   32 #define _SYS__TASK_H_
   33 
   34 #include <sys/queue.h>
   35 
   36 /*
   37  * Each task includes a function which is called from
   38  * taskqueue_run().  The first argument is taken from the 'ta_context'
   39  * field of struct task and the second argument is a count of how many
   40  * times the task was enqueued before the call to taskqueue_run().
   41  *
   42  * List of locks
   43  * (c)  const after init
   44  * (q)  taskqueue lock
   45  */
   46 typedef void task_fn_t(void *context, int pending);
   47 typedef void gtask_fn_t(void *context);
   48 
   49 struct task {
   50         STAILQ_ENTRY(task) ta_link;     /* (q) link for queue */
   51         uint16_t ta_pending;            /* (q) count times queued */
   52         u_short ta_priority;            /* (c) Priority */
   53         task_fn_t *ta_func;             /* (c) task handler */
   54         void    *ta_context;            /* (c) argument for handler */
   55 };
   56 
   57 struct gtask {
   58         STAILQ_ENTRY(gtask) ta_link;    /* (q) link for queue */
   59         uint16_t ta_flags;              /* (q) state flags */
   60         u_short ta_priority;            /* (c) Priority */
   61         gtask_fn_t *ta_func;            /* (c) task handler */
   62         void    *ta_context;            /* (c) argument for handler */
   63 };
   64 
   65 struct grouptask {
   66         struct  gtask           gt_task;
   67         void                    *gt_taskqueue;
   68         LIST_ENTRY(grouptask)   gt_list;
   69         void                    *gt_uniq;
   70 #define GROUPTASK_NAMELEN       32
   71         char                    gt_name[GROUPTASK_NAMELEN];
   72         int16_t                 gt_irq;
   73         int16_t                 gt_cpu;
   74 };
   75 
   76 #endif /* !_SYS__TASK_H_ */

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

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sys/sys/_task.h