1 // SPDX-License-Identifier: GPL-2.0
9 int init_rwsem(struct rw_semaphore *sem)
12 mutex_init(&sem->mtx);
15 return pthread_rwlock_init(&sem->lock, NULL);
19 int exit_rwsem(struct rw_semaphore *sem)
22 mutex_destroy(&sem->mtx);
25 return pthread_rwlock_destroy(&sem->lock);
29 int down_read(struct rw_semaphore *sem)
32 mutex_lock(&sem->mtx);
35 return perf_singlethreaded ? 0 : pthread_rwlock_rdlock(&sem->lock);
39 int up_read(struct rw_semaphore *sem)
42 mutex_unlock(&sem->mtx);
45 return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock);
49 int down_write(struct rw_semaphore *sem)
52 mutex_lock(&sem->mtx);
55 return perf_singlethreaded ? 0 : pthread_rwlock_wrlock(&sem->lock);
59 int up_write(struct rw_semaphore *sem)
62 mutex_unlock(&sem->mtx);
65 return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock);