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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_PERCPU_RWSEM_H
#define _LINUX_PERCPU_RWSEM_H
#include <pthread.h>
#include <linux/cleanup.h>
#include <linux/preempt.h>
struct percpu_rw_semaphore {
pthread_mutex_t lock;
};
static inline void percpu_down_read_preempt_disable(struct percpu_rw_semaphore *sem)
{
pthread_mutex_lock(&sem->lock);
}
static inline void percpu_down_read(struct percpu_rw_semaphore *sem)
{
pthread_mutex_lock(&sem->lock);
}
static inline int percpu_down_read_trylock(struct percpu_rw_semaphore *sem)
{
return !pthread_mutex_trylock(&sem->lock);
}
static inline void percpu_up_read_preempt_enable(struct percpu_rw_semaphore *sem)
{
pthread_mutex_unlock(&sem->lock);
}
static inline void percpu_up_read(struct percpu_rw_semaphore *sem)
{
pthread_mutex_unlock(&sem->lock);
}
static inline void percpu_down_write(struct percpu_rw_semaphore *sem)
{
pthread_mutex_lock(&sem->lock);
}
static inline void percpu_up_write(struct percpu_rw_semaphore *sem)
{
pthread_mutex_unlock(&sem->lock);
}
static inline void percpu_free_rwsem(struct percpu_rw_semaphore *sem) {}
static inline int percpu_init_rwsem(struct percpu_rw_semaphore *sem)
{
pthread_mutex_init(&sem->lock, NULL);
return 0;
}
#define percpu_rwsem_assert_held(sem) do {} while (0)
DEFINE_GUARD(percpu_read, struct percpu_rw_semaphore *,
percpu_down_read(_T), percpu_up_read(_T))
DEFINE_GUARD_COND(percpu_read, _try, percpu_down_read_trylock(_T))
DEFINE_GUARD(percpu_write, struct percpu_rw_semaphore *,
percpu_down_write(_T), percpu_up_write(_T))
#endif
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