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 8 typedef atomic_t snd_use_lock_t; 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 */ 34