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.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
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.
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.
31 #ifndef _LINUX_WAIT_H_
32 #define _LINUX_WAIT_H_
34 #include <linux/compiler.h>
35 #include <linux/spinlock.h>
36 #include <linux/sched.h>
37 #include <linux/list.h>
38 #include <linux/jiffies.h>
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/sleepqueue.h>
43 #include <sys/kernel.h>
53 #define init_waitqueue_head(x) \
57 __wake_up(wait_queue_head_t *q, int all)
65 wakeup_swapper = sleepq_broadcast(c, SLEEPQ_SLEEP, 0, 0);
67 wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0);
73 #define wake_up(q) __wake_up(q, 0)
74 #define wake_up_nr(q, nr) __wake_up(q, 1)
75 #define wake_up_all(q) __wake_up(q, 1)
76 #define wake_up_interruptible(q) __wake_up(q, 0)
77 #define wake_up_interruptible_nr(q, nr) __wake_up(q, 1)
78 #define wake_up_interruptible_all(q, nr) __wake_up(q, 1)
80 #define wait_event(q, cond) \
82 void *c = &(q).wchan; \
85 if (SCHEDULER_STOPPED()) \
92 sleepq_add(c, NULL, "completion", SLEEPQ_SLEEP, 0); \
98 #define wait_event_interruptible(q, cond) \
100 void *c = &(q).wchan; \
105 for (; _error == 0;) { \
106 if (SCHEDULER_STOPPED()) \
113 sleepq_add(c, NULL, "completion", \
114 SLEEPQ_SLEEP | SLEEPQ_INTERRUPTIBLE, 0); \
115 if (sleepq_wait_sig(c, 0)) \
116 _error = -ERESTARTSYS; \
122 #define wait_event_interruptible_timeout(q, cond, timeout) \
124 void *c = &(q).wchan; \
125 long end = jiffies + timeout; \
130 for (; __rc == 0;) { \
131 if (SCHEDULER_STOPPED()) \
139 sleepq_add(c, NULL, "completion", \
140 SLEEPQ_SLEEP | SLEEPQ_INTERRUPTIBLE, 0); \
141 sleepq_set_timeout(c, linux_timer_jiffies_until(end));\
142 __rc = sleepq_timedwait_sig (c, 0); \
144 /* check for timeout or signal. \
145 * 0 if the condition evaluated to false\
146 * after the timeout elapsed, 1 if the \
147 * condition evaluated to true after the\
150 if (__rc == EWOULDBLOCK) \
153 __ret = -ERESTARTSYS; \
158 /* return remaining jiffies (at least 1) if the \
159 * condition evaluated to true before the timeout \
162 __ret = (end - jiffies); \
171 waitqueue_active(wait_queue_head_t *q)
173 return 0; /* XXX: not really implemented */
176 #define DEFINE_WAIT(name) \
177 wait_queue_t name = {}
180 prepare_to_wait(wait_queue_head_t *q, wait_queue_t *wait, int state)
185 finish_wait(wait_queue_head_t *q, wait_queue_t *wait)
189 #endif /* _LINUX_WAIT_H_ */