include/linux/signalfd.h

   1 /*
   2  *  include/linux/signalfd.h
   3  *
   4  *  Copyright (C) 2007  Davide Libenzi <davidel@xmailserver.org>
   5  *
   6  */
   7
   8 #ifndef _LINUX_SIGNALFD_H
   9 #define _LINUX_SIGNALFD_H
  10
  11
  12 struct signalfd_siginfo {
  13         __u32 ssi_signo;
  14         __s32 ssi_errno;
  15         __s32 ssi_code;
  16         __u32 ssi_pid;
  17         __u32 ssi_uid;
  18         __s32 ssi_fd;
  19         __u32 ssi_tid;
  20         __u32 ssi_band;
  21         __u32 ssi_overrun;
  22         __u32 ssi_trapno;
  23         __s32 ssi_status;
  24         __s32 ssi_int;
  25         __u64 ssi_ptr;
  26         __u64 ssi_utime;
  27         __u64 ssi_stime;
  28         __u64 ssi_addr;
  29
  30         /*
  31          * Pad strcture to 128 bytes. Remember to update the
  32          * pad size when you add new members. We use a fixed
  33          * size structure to avoid compatibility problems with
  34          * future versions, and we leave extra space for additional
  35          * members. We use fixed size members because this strcture
  36          * comes out of a read(2) and we really don't want to have
  37          * a compat on read(2).
  38          */
  39         __u8 __pad[48];
  40 };
  41
  42
  43 #ifdef __KERNEL__
  44
  45 #ifdef CONFIG_SIGNALFD
  46
  47 /*
  48  * Deliver the signal to listening signalfd.
  49  */
  50 static inline void signalfd_notify(struct task_struct *tsk, int sig)
  51 {
  52         if (unlikely(waitqueue_active(&tsk->sighand->signalfd_wqh)))
  53                 wake_up(&tsk->sighand->signalfd_wqh);
  54 }
  55
  56 #else /* CONFIG_SIGNALFD */
  57
  58 static inline void signalfd_notify(struct task_struct *tsk, int sig) { }
  59
  60 #endif /* CONFIG_SIGNALFD */
  61
  62 #endif /* __KERNEL__ */
  63
  64 #endif /* _LINUX_SIGNALFD_H */
  65