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 #include <linux/types.h>
  12 /* For O_CLOEXEC and O_NONBLOCK */
  13 #include <linux/fcntl.h>
  14
  15 /* Flags for signalfd4.  */
  16 #define SFD_CLOEXEC O_CLOEXEC
  17 #define SFD_NONBLOCK O_NONBLOCK
  18
  19 struct signalfd_siginfo {
  20         __u32 ssi_signo;
  21         __s32 ssi_errno;
  22         __s32 ssi_code;
  23         __u32 ssi_pid;
  24         __u32 ssi_uid;
  25         __s32 ssi_fd;
  26         __u32 ssi_tid;
  27         __u32 ssi_band;
  28         __u32 ssi_overrun;
  29         __u32 ssi_trapno;
  30         __s32 ssi_status;
  31         __s32 ssi_int;
  32         __u64 ssi_ptr;
  33         __u64 ssi_utime;
  34         __u64 ssi_stime;
  35         __u64 ssi_addr;
  36         __u16 ssi_addr_lsb;
  37
  38         /*
  39          * Pad strcture to 128 bytes. Remember to update the
  40          * pad size when you add new members. We use a fixed
  41          * size structure to avoid compatibility problems with
  42          * future versions, and we leave extra space for additional
  43          * members. We use fixed size members because this strcture
  44          * comes out of a read(2) and we really don't want to have
  45          * a compat on read(2).
  46          */
  47         __u8 __pad[46];
  48 };
  49
  50
  51 #ifdef __KERNEL__
  52
  53 #ifdef CONFIG_SIGNALFD
  54
  55 /*
  56  * Deliver the signal to listening signalfd.
  57  */
  58 static inline void signalfd_notify(struct task_struct *tsk, int sig)
  59 {
  60         if (unlikely(waitqueue_active(&tsk->sighand->signalfd_wqh)))
  61                 wake_up(&tsk->sighand->signalfd_wqh);
  62 }
  63
  64 extern void signalfd_cleanup(struct sighand_struct *sighand);
  65
  66 #else /* CONFIG_SIGNALFD */
  67
  68 static inline void signalfd_notify(struct task_struct *tsk, int sig) { }
  69
  70 static inline void signalfd_cleanup(struct sighand_struct *sighand) { }
  71
  72 #endif /* CONFIG_SIGNALFD */
  73
  74 #endif /* __KERNEL__ */
  75
  76 #endif /* _LINUX_SIGNALFD_H */