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/* 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 */
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