1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _LIBLOCKDEP_RWLOCK_H
 3#define _LIBLOCKDEP_RWLOCK_H
 4
 5#include <pthread.h>
 6#include "common.h"
 7
 8struct liblockdep_pthread_rwlock {
 9	pthread_rwlock_t rwlock;
10	struct lockdep_map dep_map;
11};
12
13typedef struct liblockdep_pthread_rwlock liblockdep_pthread_rwlock_t;
14
15#define LIBLOCKDEP_PTHREAD_RWLOCK_INITIALIZER(rwl)			\
16		(struct liblockdep_pthread_rwlock) {			\
17	.rwlock = PTHREAD_RWLOCK_INITIALIZER,				\
18	.dep_map = STATIC_LOCKDEP_MAP_INIT(#rwl, &((&(rwl))->dep_map)),	\
19}
20
21static inline int __rwlock_init(liblockdep_pthread_rwlock_t *lock,
22				const char *name,
23				struct lock_class_key *key,
24				const pthread_rwlockattr_t *attr)
25{
26	lockdep_init_map(&lock->dep_map, name, key, 0);
27
28	return pthread_rwlock_init(&lock->rwlock, attr);
29}
30
31#define liblockdep_pthread_rwlock_init(lock, attr)		\
32({							\
33	static struct lock_class_key __key;		\
34							\
35	__rwlock_init((lock), #lock, &__key, (attr));	\
36})
37
38static inline int liblockdep_pthread_rwlock_rdlock(liblockdep_pthread_rwlock_t *lock)
39{
40	lock_acquire(&lock->dep_map, 0, 0, 2, 1, NULL, (unsigned long)_RET_IP_);
41	return pthread_rwlock_rdlock(&lock->rwlock);
42
43}
44
45static inline int liblockdep_pthread_rwlock_unlock(liblockdep_pthread_rwlock_t *lock)
46{
47	lock_release(&lock->dep_map, (unsigned long)_RET_IP_);
48	return pthread_rwlock_unlock(&lock->rwlock);
49}
50
51static inline int liblockdep_pthread_rwlock_wrlock(liblockdep_pthread_rwlock_t *lock)
52{
53	lock_acquire(&lock->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
54	return pthread_rwlock_wrlock(&lock->rwlock);
55}
56
57static inline int liblockdep_pthread_rwlock_tryrdlock(liblockdep_pthread_rwlock_t *lock)
58{
59	lock_acquire(&lock->dep_map, 0, 1, 2, 1, NULL, (unsigned long)_RET_IP_);
60	return pthread_rwlock_tryrdlock(&lock->rwlock) == 0 ? 1 : 0;
61}
62
63static inline int liblockdep_pthread_rwlock_trywrlock(liblockdep_pthread_rwlock_t *lock)
64{
65	lock_acquire(&lock->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
66	return pthread_rwlock_trywrlock(&lock->rwlock) == 0 ? 1 : 0;
67}
68
69static inline int liblockdep_rwlock_destroy(liblockdep_pthread_rwlock_t *lock)
70{
71	return pthread_rwlock_destroy(&lock->rwlock);
72}
73
74#ifdef __USE_LIBLOCKDEP
75
76#define pthread_rwlock_t		liblockdep_pthread_rwlock_t
77#define pthread_rwlock_init		liblockdep_pthread_rwlock_init
78#define pthread_rwlock_rdlock		liblockdep_pthread_rwlock_rdlock
79#define pthread_rwlock_unlock		liblockdep_pthread_rwlock_unlock
80#define pthread_rwlock_wrlock		liblockdep_pthread_rwlock_wrlock
81#define pthread_rwlock_tryrdlock	liblockdep_pthread_rwlock_tryrdlock
82#define pthread_rwlock_trywrlock	liblockdep_pthread_rwlock_trywrlock
83#define pthread_rwlock_destroy		liblockdep_rwlock_destroy
84
85#endif
86
87#endif