1/* SPDX-License-Identifier: GPL-2.0+ */
2#ifndef _TOOLS__RWSEM_H
3#define _TOOLS__RWSEM_H
4
5#include <pthread.h>
6
7struct rw_semaphore {
8	pthread_rwlock_t lock;
9};
10
11static inline int init_rwsem(struct rw_semaphore *sem)
12{
13	return pthread_rwlock_init(&sem->lock, NULL);
14}
15
16static inline int exit_rwsem(struct rw_semaphore *sem)
17{
18	return pthread_rwlock_destroy(&sem->lock);
19}
20
21static inline int down_read(struct rw_semaphore *sem)
22{
23	return pthread_rwlock_rdlock(&sem->lock);
24}
25
26static inline int up_read(struct rw_semaphore *sem)
27{
28	return pthread_rwlock_unlock(&sem->lock);
29}
30
31static inline int down_write(struct rw_semaphore *sem)
32{
33	return pthread_rwlock_wrlock(&sem->lock);
34}
35
36static inline int up_write(struct rw_semaphore *sem)
37{
38	return pthread_rwlock_unlock(&sem->lock);
39}
40
41#define down_read_nested(sem, subclass)		down_read(sem)
42#define down_write_nested(sem, subclass)	down_write(sem)
43
44#endif /* _TOOLS_RWSEM_H */
45