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1/* SPDX-License-Identifier: GPL-2.0+ */2#ifndef _TOOLS__RWSEM_H3#define _TOOLS__RWSEM_H4 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