diff options
| author | Yuval Adam <_@yuv.al> | 2017-08-30 08:25:59 +0000 |
|---|---|---|
| committer | Yuval Adam <_@yuv.al> | 2017-08-30 08:25:59 +0000 |
| commit | 8e4bff4cab0ddac6060645b0715210484d02ff40 (patch) | |
| tree | 3a5c3024371a04692a3a6d9974d001cdff8ebf84 /sound/core/seq/seq_lock.h | |
Diffstat (limited to 'sound/core/seq/seq_lock.h')
| -rw-r--r-- | sound/core/seq/seq_lock.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/sound/core/seq/seq_lock.h b/sound/core/seq/seq_lock.h new file mode 100644 index 00000000..54044bc2 --- /dev/null +++ b/sound/core/seq/seq_lock.h @@ -0,0 +1,33 @@ +#ifndef __SND_SEQ_LOCK_H +#define __SND_SEQ_LOCK_H + +#include <linux/sched.h> + +#if defined(CONFIG_SMP) || defined(CONFIG_SND_DEBUG) + +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__) + +#else /* SMP || CONFIG_SND_DEBUG */ + +typedef spinlock_t snd_use_lock_t; /* dummy */ +#define snd_use_lock_init(lockp) /**/ +#define snd_use_lock_use(lockp) /**/ +#define snd_use_lock_free(lockp) /**/ +#define snd_use_lock_sync(lockp) /**/ + +#endif /* SMP || CONFIG_SND_DEBUG */ + +#endif /* __SND_SEQ_LOCK_H */ |