1 /*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
13 * disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29 #ifndef _LINUX_WAIT_H_
30 #define _LINUX_WAIT_H_
31
32 #include <linux/spinlock.h>
33 #include <linux/sched.h>
34 #include <linux/list.h>
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/sleepqueue.h>
39 #include <sys/kernel.h>
40 #include <sys/proc.h>
41
42 struct __wait_queue_head {
43 unsigned int wchan;
44 };
45 typedef struct __wait_queue_head wait_queue_head_t;
46
47 #define init_waitqueue_head(x)
48
49 static inline void
__wake_up(struct __wait_queue_head * q,int all)50 __wake_up(struct __wait_queue_head *q, int all)
51 {
52 int wakeup_swapper;
53 void *c;
54
55 c = &q->wchan;
56 sleepq_lock(c);
57 if (all)
58 wakeup_swapper = sleepq_broadcast(c, SLEEPQ_SLEEP, 0, 0);
59 else
60 wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0);
61 sleepq_release(c);
62 if (wakeup_swapper)
63 kick_proc0();
64 }
65
66 #define wake_up(q) __wake_up(q, 0)
67 #define wake_up_nr(q, nr) __wake_up(q, 1)
68 #define wake_up_all(q) __wake_up(q, 1)
69 #define wake_up_interruptible(q) __wake_up(q, 0)
70 #define wake_up_interruptible_nr(q, nr) __wake_up(q, 1)
71 #define wake_up_interruptible_all(q, nr) __wake_up(q, 1)
72
73 #define wait_event(q, cond) \
74 do { \
75 void *c = &(q).wchan; \
76 if (!(cond)) { \
77 for (;;) { \
78 sleepq_lock(c); \
79 if (cond) { \
80 sleepq_release(c); \
81 break; \
82 } \
83 sleepq_add(c, NULL, "completion", SLEEPQ_SLEEP, 0); \
84 sleepq_wait(c, 0); \
85 } \
86 } \
87 } while (0)
88
89 #define wait_event_interruptible(q, cond) \
90 ({ \
91 void *c = &(q).wchan; \
92 int _error; \
93 \
94 _error = 0; \
95 if (!(cond)) { \
96 for (; _error == 0;) { \
97 sleepq_lock(c); \
98 if (cond) { \
99 sleepq_release(c); \
100 break; \
101 } \
102 sleepq_add(c, NULL, "completion", \
103 SLEEPQ_SLEEP | SLEEPQ_INTERRUPTIBLE, 0); \
104 if (sleepq_wait_sig(c, 0)) \
105 _error = -ERESTARTSYS; \
106 } \
107 } \
108 -_error; \
109 })
110
111 #define DEFINE_WAIT(x)
112
113 #endif /* _LINUX_WAIT_H_ */
114