1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
* All rights reserved.
*
* 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 unmodified, 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _LINUX_WORKQUEUE_H_
#define _LINUX_WORKQUEUE_H_
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <sys/taskqueue.h>
struct workqueue_struct {
struct taskqueue *taskqueue;
};
struct work_struct {
struct task work_task;
struct taskqueue *taskqueue;
void (*fn)(struct work_struct *);
};
struct delayed_work {
struct work_struct work;
struct callout timer;
};
static inline struct delayed_work *
to_delayed_work(struct work_struct *work)
{
return container_of(work, struct delayed_work, work);
}
static inline void
_work_fn(void *context, int pending)
{
struct work_struct *work;
work = context;
work->fn(work);
}
#define INIT_WORK(work, func) \
do { \
(work)->fn = (func); \
(work)->taskqueue = NULL; \
TASK_INIT(&(work)->work_task, 0, _work_fn, (work)); \
} while (0)
#define INIT_DELAYED_WORK(_work, func) \
do { \
INIT_WORK(&(_work)->work, func); \
callout_init(&(_work)->timer, 1); \
} while (0)
#define INIT_DEFERRABLE_WORK INIT_DELAYED_WORK
#define schedule_work(work) \
do { \
(work)->taskqueue = taskqueue_thread; \
taskqueue_enqueue(taskqueue_thread, &(work)->work_task); \
} while (0)
#define flush_scheduled_work() flush_taskqueue(taskqueue_thread)
static inline int queue_work(struct workqueue_struct *q, struct work_struct *work)
{
(work)->taskqueue = (q)->taskqueue;
/* Return opposite val to align with Linux logic */
return !taskqueue_enqueue((q)->taskqueue, &(work)->work_task);
}
static inline void
_delayed_work_fn(void *arg)
{
struct delayed_work *work;
work = arg;
taskqueue_enqueue(work->work.taskqueue, &work->work.work_task);
}
static inline int
queue_delayed_work(struct workqueue_struct *wq, struct delayed_work *work,
unsigned long delay)
{
int pending;
pending = work->work.work_task.ta_pending;
work->work.taskqueue = wq->taskqueue;
if (delay != 0)
callout_reset(&work->timer, delay, _delayed_work_fn, work);
else
_delayed_work_fn((void *)work);
return (!pending);
}
static inline bool schedule_delayed_work(struct delayed_work *dwork,
unsigned long delay)
{
struct workqueue_struct wq;
wq.taskqueue = taskqueue_thread;
return queue_delayed_work(&wq, dwork, delay);
}
static inline struct workqueue_struct *
_create_workqueue_common(char *name, int cpus)
{
struct workqueue_struct *wq;
wq = kmalloc(sizeof(*wq), M_WAITOK);
wq->taskqueue = taskqueue_create((name), M_WAITOK,
taskqueue_thread_enqueue, &wq->taskqueue);
taskqueue_start_threads(&wq->taskqueue, cpus, PWAIT, "%s", name);
return (wq);
}
#define create_singlethread_workqueue(name) \
_create_workqueue_common(name, 1)
#define create_workqueue(name) \
_create_workqueue_common(name, MAXCPU)
#define alloc_ordered_workqueue(name, flags) \
_create_workqueue_common(name, 1)
#define alloc_workqueue(name, flags, max_active) \
_create_workqueue_common(name, max_active)
static inline void
destroy_workqueue(struct workqueue_struct *wq)
{
taskqueue_free(wq->taskqueue);
kfree(wq);
}
#define flush_workqueue(wq) flush_taskqueue((wq)->taskqueue)
static inline void
_flush_fn(void *context, int pending)
{
}
static inline void
flush_taskqueue(struct taskqueue *tq)
{
struct task flushtask;
PHOLD(curproc);
TASK_INIT(&flushtask, 0, _flush_fn, NULL);
taskqueue_enqueue(tq, &flushtask);
taskqueue_drain(tq, &flushtask);
PRELE(curproc);
}
static inline int
cancel_work_sync(struct work_struct *work)
{
if (work->taskqueue &&
taskqueue_cancel(work->taskqueue, &work->work_task, NULL))
taskqueue_drain(work->taskqueue, &work->work_task);
return 0;
}
/*
* This may leave work running on another CPU as it does on Linux.
*/
static inline int
cancel_delayed_work(struct delayed_work *work)
{
callout_stop(&work->timer);
if (work->work.taskqueue)
return (taskqueue_cancel(work->work.taskqueue,
&work->work.work_task, NULL) == 0);
return 0;
}
static inline int
cancel_delayed_work_sync(struct delayed_work *work)
{
callout_drain(&work->timer);
if (work->work.taskqueue &&
taskqueue_cancel(work->work.taskqueue, &work->work.work_task, NULL))
taskqueue_drain(work->work.taskqueue, &work->work.work_task);
return 0;
}
static inline bool
mod_delayed_work(struct workqueue_struct *wq, struct delayed_work *dwork,
unsigned long delay)
{
cancel_delayed_work(dwork);
queue_delayed_work(wq, dwork, delay);
return false;
}
#endif /* _LINUX_WORKQUEUE_H_ */
|
