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seq_lock.h
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1 #ifndef __SND_SEQ_LOCK_H
2 #define __SND_SEQ_LOCK_H
3 
4 #include <linux/sched.h>
5 
6 #if defined(CONFIG_SMP) || defined(CONFIG_SND_DEBUG)
7 
9 
10 /* initialize lock */
11 #define snd_use_lock_init(lockp) atomic_set(lockp, 0)
12 
13 /* increment lock */
14 #define snd_use_lock_use(lockp) atomic_inc(lockp)
15 
16 /* release lock */
17 #define snd_use_lock_free(lockp) atomic_dec(lockp)
18 
19 /* wait until all locks are released */
20 void snd_use_lock_sync_helper(snd_use_lock_t *lock, const char *file, int line);
21 #define snd_use_lock_sync(lockp) snd_use_lock_sync_helper(lockp, __BASE_FILE__, __LINE__)
22 
23 #else /* SMP || CONFIG_SND_DEBUG */
24 
25 typedef spinlock_t snd_use_lock_t; /* dummy */
26 #define snd_use_lock_init(lockp)
27 #define snd_use_lock_use(lockp)
28 #define snd_use_lock_free(lockp)
29 #define snd_use_lock_sync(lockp)
30 
31 #endif /* SMP || CONFIG_SND_DEBUG */
32 
33 #endif /* __SND_SEQ_LOCK_H */