release/src-rt-6.x/linux/linux-2.6/include/linux/eventfd.h

   1 /*
   2  *  include/linux/eventfd.h
   3  *
   4  *  Copyright (C) 2007  Davide Libenzi <davidel@xmailserver.org>
   5  *
   6  */
   7
   8 #ifndef _LINUX_EVENTFD_H
   9 #define _LINUX_EVENTFD_H
  10
  11
  12 #ifdef __KERNEL__
  13
  14 #ifdef CONFIG_EVENTFD
  15
  16 struct file *eventfd_fget(int fd);
  17 int eventfd_signal(struct file *file, int n);
  18
  19 #else /* CONFIG_EVENTFD */
  20
  21 #define eventfd_fget(fd) ERR_PTR(-ENOSYS)
  22 static inline int eventfd_signal(struct file *file, int n)
  23 { return 0; }
  24
  25 #endif /* CONFIG_EVENTFD */
  26
  27 #endif /* __KERNEL__ */
  28
  29 #endif /* _LINUX_EVENTFD_H */
  30