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 
29 #ifndef __LINUXKPI_LINUX_WAITBIT_H__
30 #define	__LINUXKPI_LINUX_WAITBIT_H__
31 
32 #include <linux/wait.h>
33 #include <linux/bitops.h>
34 
35 extern wait_queue_head_t linux_bit_waitq;
36 extern wait_queue_head_t linux_var_waitq;
37 
38 #define	wait_var_event_killable(var, cond) \
39 	wait_event_killable(linux_var_waitq, cond)
40 
41 #define	wait_var_event_interruptible(var, cond) \
42 	wait_event_interruptible(linux_var_waitq, cond)
43 
44 static inline void
45 clear_and_wake_up_bit(int bit, void *word)
46 {
47 	clear_bit_unlock(bit, word);
48 	wake_up_bit(word, bit);
49 }
50 
51 static inline wait_queue_head_t *
52 bit_waitqueue(void *word, int bit)
53 {
54 
55 	return (&linux_bit_waitq);
56 }
57 
58 static inline void
59 wake_up_var(void *var)
60 {
61 
62 	wake_up(&linux_var_waitq);
63 }
64 
65 static inline wait_queue_head_t *
66 __var_waitqueue(void *p)
67 {
68 	return (&linux_var_waitq);
69 }
70 
71 #endif	/* __LINUXKPI_LINUX_WAITBIT_H__ */
72