/* 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 */