drivers/sound/soundmodule.h

   1 #ifndef _SOUNDMODULE_H
   2 #define _SOUNDMODULE_H
   3
   4 #include <linux/notifier.h>
   5
   6 extern struct notifier_block *sound_locker;
   7 extern void sound_notifier_chain_register(struct notifier_block *);
   8
   9 #ifdef MODULE
  10
  11 #define SOUND_LOCK              sound_notifier_chain_register(&sound_notifier);
  12 #define SOUND_LOCK_END          notifier_chain_unregister(&sound_locker, &sound_notifier)
  13
  14 static int my_notifier_call(struct notifier_block *b, unsigned long foo, void *bar)
  15 {
  16         if(foo)
  17                 MOD_INC_USE_COUNT;
  18         else
  19                 MOD_DEC_USE_COUNT;
  20         return NOTIFY_DONE;
  21 }
  22
  23 static struct notifier_block sound_notifier=
  24 {
  25         my_notifier_call,
  26         (void *)0,
  27         0
  28 };
  29
  30 #endif
  31 #endif