1 /*-
2  * Copyright (c) 2020 The FreeBSD Foundation
3  *
4  * This software was developed by Emmanuel Vadot under sponsorship
5  * from the FreeBSD Foundation.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  *
28  * $FreeBSD$
29  */
30 
31 #ifndef __LINUXKPI_LINUX_WAITBIT_H__
32 #define	__LINUXKPI_LINUX_WAITBIT_H__
33 
34 #include <linux/wait.h>
35 #include <linux/bitops.h>
36 
37 extern wait_queue_head_t linux_bit_waitq;
38 extern wait_queue_head_t linux_var_waitq;
39 
40 #define	wait_var_event_killable(var, cond) \
41 	wait_event_killable(linux_var_waitq, cond)
42 
43 #define	wait_var_event_interruptible(var, cond) \
44 	wait_event_interruptible(linux_var_waitq, cond)
45 
46 static inline void
47 clear_and_wake_up_bit(int bit, void *word)
48 {
49 	clear_bit_unlock(bit, word);
50 	wake_up_bit(word, bit);
51 }
52 
53 static inline wait_queue_head_t *
54 bit_waitqueue(void *word, int bit)
55 {
56 
57 	return (&linux_bit_waitq);
58 }
59 
60 static inline void
61 wake_up_var(void *var)
62 {
63 
64 	wake_up(&linux_var_waitq);
65 }
66 
67 static inline wait_queue_head_t *
68 __var_waitqueue(void *p)
69 {
70 	return (&linux_var_waitq);
71 }
72 
73 #endif	/* __LINUXKPI_LINUX_WAITBIT_H__ */
74