_task.h revision 145473 
1/*-
2 * Copyright (c) 2000 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/sys/_task.h 145473 2005-04-24 16:52:45Z sam $
27 */
28
29#ifndef _SYS__TASK_H_
30#define _SYS__TASK_H_
31
32#include <sys/queue.h>
33
34/*
35 * Each task includes a function which is called from
36 * taskqueue_run().  The first argument is taken from the 'ta_context'
37 * field of struct task and the second argument is a count of how many
38 * times the task was enqueued before the call to taskqueue_run().
39 */
40typedef void task_fn_t(void *context, int pending);
41
42struct task {
43	STAILQ_ENTRY(task) ta_link;	/* link for queue */
44	u_short	ta_pending;		/* count times queued */
45	u_short	ta_priority;		/* Priority */
46	task_fn_t *ta_func;		/* task handler */
47	void	*ta_context;		/* argument for handler */
48};
49
50#endif /* !_SYS__TASK_H_ */
51