sound/core/seq/seq_lock.h

   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 */