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
|
/*-
* 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_WAIT_H_
#define _LINUX_WAIT_H_
#include <linux/compiler.h>
#include <linux/list.h>
#include <linux/jiffies.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sleepqueue.h>
#include <sys/kernel.h>
#include <sys/proc.h>
typedef struct {
} wait_queue_t;
typedef struct {
unsigned int wchan;
} wait_queue_head_t;
#define init_waitqueue_head(x) \
do { } while (0)
static inline void
__wake_up(wait_queue_head_t *q, int all)
{
int wakeup_swapper;
void *c;
c = &q->wchan;
sleepq_lock(c);
if (all)
wakeup_swapper = sleepq_broadcast(c, SLEEPQ_SLEEP, 0, 0);
else
wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0);
sleepq_release(c);
if (wakeup_swapper)
kick_proc0();
}
#define wake_up(q) __wake_up(q, 0)
#define wake_up_nr(q, nr) __wake_up(q, 1)
#define wake_up_all(q) __wake_up(q, 1)
#define wake_up_interruptible(q) __wake_up(q, 0)
#define wake_up_interruptible_nr(q, nr) __wake_up(q, 1)
#define wake_up_interruptible_all(q, nr) __wake_up(q, 1)
#define wait_event(q, cond) \
do { \
void *c = &(q).wchan; \
if (!(cond)) { \
for (;;) { \
if (SCHEDULER_STOPPED()) \
break; \
sleepq_lock(c); \
if (cond) { \
sleepq_release(c); \
break; \
} \
sleepq_add(c, NULL, "completion", SLEEPQ_SLEEP, 0); \
sleepq_wait(c, 0); \
} \
} \
} while (0)
#define wait_event_interruptible(q, cond) \
({ \
void *c = &(q).wchan; \
int _error; \
\
_error = 0; \
if (!(cond)) { \
for (; _error == 0;) { \
if (SCHEDULER_STOPPED()) \
break; \
sleepq_lock(c); \
if (cond) { \
sleepq_release(c); \
break; \
} \
sleepq_add(c, NULL, "completion", \
SLEEPQ_SLEEP | SLEEPQ_INTERRUPTIBLE, 0); \
if (sleepq_wait_sig(c, 0)) \
_error = -ERESTARTSYS; \
} \
} \
-_error; \
})
#define wait_event_interruptible_timeout(q, cond, timeout) \
({ \
void *c = &(q).wchan; \
long end = jiffies + timeout; \
int __ret = 0; \
int __rc = 0; \
\
if (!(cond)) { \
for (; __rc == 0;) { \
if (SCHEDULER_STOPPED()) \
break; \
sleepq_lock(c); \
if (cond) { \
sleepq_release(c); \
__ret = 1; \
break; \
} \
sleepq_add(c, NULL, "completion", \
SLEEPQ_SLEEP | SLEEPQ_INTERRUPTIBLE, 0); \
sleepq_set_timeout(c, linux_timer_jiffies_until(end));\
__rc = sleepq_timedwait_sig (c, 0); \
if (__rc != 0) { \
/* check for timeout or signal. \
* 0 if the condition evaluated to false\
* after the timeout elapsed, 1 if the \
* condition evaluated to true after the\
* timeout elapsed. \
*/ \
if (__rc == EWOULDBLOCK) \
__ret = (cond); \
else \
__ret = -ERESTARTSYS; \
} \
\
} \
} else { \
/* return remaining jiffies (at least 1) if the \
* condition evaluated to true before the timeout \
* elapsed. \
*/ \
__ret = (end - jiffies); \
if( __ret < 1 ) \
__ret = 1; \
} \
__ret; \
})
static inline int
waitqueue_active(wait_queue_head_t *q)
{
return 0; /* XXX: not really implemented */
}
#define DEFINE_WAIT(name) \
wait_queue_t name = {}
static inline void
prepare_to_wait(wait_queue_head_t *q, wait_queue_t *wait, int state)
{
}
static inline void
finish_wait(wait_queue_head_t *q, wait_queue_t *wait)
{
}
#endif /* _LINUX_WAIT_H_ */
|
