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/list.h>
36 #include <linux/jiffies.h>
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/sleepqueue.h>
41 #include <sys/kernel.h>
51 #define init_waitqueue_head(x) \
55 __wake_up(wait_queue_head_t *q, int all)
63 wakeup_swapper = sleepq_broadcast(c, SLEEPQ_SLEEP, 0, 0);
65 wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0);
71 #define wake_up(q) __wake_up(q, 0)
72 #define wake_up_nr(q, nr) __wake_up(q, 1)
73 #define wake_up_all(q) __wake_up(q, 1)
74 #define wake_up_interruptible(q) __wake_up(q, 0)
75 #define wake_up_interruptible_nr(q, nr) __wake_up(q, 1)
76 #define wake_up_interruptible_all(q, nr) __wake_up(q, 1)
78 #define wait_event(q, cond) \
80 void *c = &(q).wchan; \
83 if (SCHEDULER_STOPPED()) \
90 sleepq_add(c, NULL, "completion", SLEEPQ_SLEEP, 0); \
96 #define wait_event_interruptible(q, cond) \
98 void *c = &(q).wchan; \
103 for (; _error == 0;) { \
104 if (SCHEDULER_STOPPED()) \
111 sleepq_add(c, NULL, "completion", \
112 SLEEPQ_SLEEP | SLEEPQ_INTERRUPTIBLE, 0); \
113 if (sleepq_wait_sig(c, 0)) \
114 _error = -ERESTARTSYS; \
120 #define wait_event_interruptible_timeout(q, cond, timeout) \
122 void *c = &(q).wchan; \
123 long end = jiffies + timeout; \
128 for (; __rc == 0;) { \
129 if (SCHEDULER_STOPPED()) \
137 sleepq_add(c, NULL, "completion", \
138 SLEEPQ_SLEEP | SLEEPQ_INTERRUPTIBLE, 0); \
139 sleepq_set_timeout(c, linux_timer_jiffies_until(end));\
140 __rc = sleepq_timedwait_sig (c, 0); \
142 /* check for timeout or signal. \
143 * 0 if the condition evaluated to false\
144 * after the timeout elapsed, 1 if the \
145 * condition evaluated to true after the\
148 if (__rc == EWOULDBLOCK) \
151 __ret = -ERESTARTSYS; \
156 /* return remaining jiffies (at least 1) if the \
157 * condition evaluated to true before the timeout \
160 __ret = (end - jiffies); \
169 waitqueue_active(wait_queue_head_t *q)
171 return 0; /* XXX: not really implemented */
174 #define DEFINE_WAIT(name) \
175 wait_queue_t name = {}
178 prepare_to_wait(wait_queue_head_t *q, wait_queue_t *wait, int state)
183 finish_wait(wait_queue_head_t *q, wait_queue_t *wait)
187 #endif /* _LINUX_WAIT_H_ */