1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __SND_SEQ_LOCK_H
3 #define __SND_SEQ_LOCK_H
4 
5 #include <linux/sched.h>
6 
7 typedef atomic_t snd_use_lock_t;
8 
9 /* initialize lock */
10 #define snd_use_lock_init(lockp) atomic_set(lockp, 0)
11 
12 /* increment lock */
13 #define snd_use_lock_use(lockp) atomic_inc(lockp)
14 
15 /* release lock */
16 #define snd_use_lock_free(lockp) atomic_dec(lockp)
17 
18 /* wait until all locks are released */
19 void snd_use_lock_sync_helper(snd_use_lock_t *lock, const char *file, int line);
20 #define snd_use_lock_sync(lockp) snd_use_lock_sync_helper(lockp, __BASE_FILE__, __LINE__)
21 
22 #endif /* __SND_SEQ_LOCK_H */
23