Staging
v0.5.2
https://github.com/torvalds/linux
Raw File
Tip revision: 7d194c2100ad2a6dded545887d02754948ca5241 authored by Linus Torvalds on 20 October 2019, 19:56:22 UTC
Linux 5.4-rc4
Tip revision: 7d194c2
seq_lock.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SND_SEQ_LOCK_H
#define __SND_SEQ_LOCK_H

#include <linux/sched.h>

typedef atomic_t snd_use_lock_t;

/* initialize lock */
#define snd_use_lock_init(lockp) atomic_set(lockp, 0)

/* increment lock */
#define snd_use_lock_use(lockp) atomic_inc(lockp)

/* release lock */
#define snd_use_lock_free(lockp) atomic_dec(lockp)

/* wait until all locks are released */
void snd_use_lock_sync_helper(snd_use_lock_t *lock, const char *file, int line);
#define snd_use_lock_sync(lockp) snd_use_lock_sync_helper(lockp, __BASE_FILE__, __LINE__)

#endif /* __SND_SEQ_LOCK_H */
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