linux/fs/bcachefs/two_state_shared_lock.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_TWO_STATE_LOCK_H
#define _BCACHEFS_TWO_STATE_LOCK_H

#include <linux/atomic.h>
#include <linux/sched.h>
#include <linux/wait.h>

#include "util.h"

/*
 * Two-state lock - can be taken for add or block - both states are shared,
 * like read side of rwsem, but conflict with other state:
 */
two_state_lock_t;

static inline void two_state_lock_init(two_state_lock_t *lock)
{ … }

static inline void bch2_two_state_unlock(two_state_lock_t *lock, int s)
{ … }

static inline bool bch2_two_state_trylock(two_state_lock_t *lock, int s)
{ … }

void __bch2_two_state_lock(two_state_lock_t *, int);

static inline void bch2_two_state_lock(two_state_lock_t *lock, int s)
{ … }

#endif /* _BCACHEFS_TWO_STATE_LOCK_H */