FreeBSD/Linux Kernel Cross Reference
sys/sys/_task.h
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
48 struct task {
49 STAILQ_ENTRY(task) ta_link; /* (q) link for queue */
50 uint16_t ta_pending; /* (q) count times queued */
51 uint8_t ta_priority; /* (c) Priority */
52 uint8_t ta_flags; /* (c) Flags */
53 task_fn_t *ta_func; /* (c) task handler */
54 void *ta_context; /* (c) argument for handler */
55 };
56
57 #define TASK_ENQUEUED 0x1
58 #define TASK_NOENQUEUE 0x2
59 #define TASK_NETWORK 0x4
60
61 #define TASK_IS_NET(ta) ((ta)->ta_flags & TASK_NETWORK)
62
63 #ifdef _KERNEL
64
65 typedef void gtask_fn_t(void *context);
66
67 struct gtask {
68 STAILQ_ENTRY(gtask) ta_link; /* (q) link for queue */
69 uint16_t ta_flags; /* (q) state flags */
70 u_short ta_priority; /* (c) Priority */
71 gtask_fn_t *ta_func; /* (c) task handler */
72 void *ta_context; /* (c) argument for handler */
73 };
74
75 #endif /* _KERNEL */
76
77 #endif /* !_SYS__TASK_H_ */
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