/* SPDX-License-Identifier: GPL-2.0+ */#ifndef _TOOLS__RWSEM_H#define _TOOLS__RWSEM_H #include <pthread.h> struct rw_semaphore {	pthread_rwlock_t lock;}; static inline int init_rwsem(struct rw_semaphore *sem){	return pthread_rwlock_init(&sem->lock, NULL);} static inline int exit_rwsem(struct rw_semaphore *sem){	return pthread_rwlock_destroy(&sem->lock);} static inline int down_read(struct rw_semaphore *sem){	return pthread_rwlock_rdlock(&sem->lock);} static inline int up_read(struct rw_semaphore *sem){	return pthread_rwlock_unlock(&sem->lock);} static inline int down_write(struct rw_semaphore *sem){	return pthread_rwlock_wrlock(&sem->lock);} static inline int up_write(struct rw_semaphore *sem){	return pthread_rwlock_unlock(&sem->lock);} #define down_read_nested(sem, subclass)		down_read(sem)#define down_write_nested(sem, subclass)	down_write(sem) #endif /* _TOOLS_RWSEM_H */