aboutsummaryrefslogtreecommitdiff
path: root/sys/compat/linuxkpi/common/include/linux/wait.h
blob: c62f73519e431278bd7fffe3ac73d3930375cb0a (plain) (blame)
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
/*-
 * 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/spinlock.h>
#include <linux/sched.h>
#include <linux/list.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 (;;) {						\
			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;) {					\
			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;							\
})

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_ */