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v0.5.1
swh:1:snp:a902887e4be9191b7c6c4406aa06b31c1ce2c7cc
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Tip revision: 7566ec393f4161572ba6f11ad5171fd5d59b0fbd authored by Linus Torvalds on 16 December 2018, 23:46:55 UTC
Linux 4.20-rc7
Tip revision: 7566ec3
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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