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review.evervolv.com / android_kernel_htc_msm8960 / c420060e7b21368c21972e8a29e4ff56abb9d219 / . / include / linux / signalfd.h
blob: 247399b2979a9a331c976e9f413e4dd122ef7711 [file] [log] [blame]
Davide Libenzifba2afa2007-05-10 22:23:13 -0700[diff] [blame]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
Jaswinder Singh Rajputa788fd52009-01-30 22:14:02 +0530[diff] [blame]11#include <linux/types.h>
Ulrich Drepper5fb5e042008-07-23 21:29:37 -0700[diff] [blame]12/* For O_CLOEXEC and O_NONBLOCK */
Ulrich Drepper9deb27b2008-07-23 21:29:24 -0700[diff] [blame]13#include <linux/fcntl.h>
14
15/* Flags for signalfd4. */
16#define SFD_CLOEXEC O_CLOEXEC
Ulrich Drepper5fb5e042008-07-23 21:29:37 -0700[diff] [blame]17#define SFD_NONBLOCK O_NONBLOCK
Davide Libenzifba2afa2007-05-10 22:23:13 -0700[diff] [blame]18
19struct signalfd_siginfo {
Davide Libenzi96358de2007-10-16 23:30:23 -0700[diff] [blame]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;
Hidetoshi Setob8aeec32010-10-07 15:31:31 +0900[diff] [blame]36 __u16 ssi_addr_lsb;
Davide Libenzifba2afa2007-05-10 22:23:13 -0700[diff] [blame]37
38 /*
39 * Pad strcture to 128 bytes. Remember to update the
Robert P. J. Day14e4a0f2008-02-03 15:12:15 +0200[diff] [blame]40 * pad size when you add new members. We use a fixed
Davide Libenzifba2afa2007-05-10 22:23:13 -0700[diff] [blame]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 */
Hidetoshi Setob8aeec32010-10-07 15:31:31 +0900[diff] [blame]47 __u8 __pad[46];
Davide Libenzifba2afa2007-05-10 22:23:13 -0700[diff] [blame]48};
49
50
51#ifdef __KERNEL__
52
53#ifdef CONFIG_SIGNALFD
54
55/*
Davide Libenzib8fceee2007-09-20 12:40:16 -0700[diff] [blame]56 * Deliver the signal to listening signalfd.
Davide Libenzifba2afa2007-05-10 22:23:13 -0700[diff] [blame]57 */
58static inline void signalfd_notify(struct task_struct *tsk, int sig)
59{
Davide Libenzib8fceee2007-09-20 12:40:16 -0700[diff] [blame]60 if (unlikely(waitqueue_active(&tsk->sighand->signalfd_wqh)))
61 wake_up(&tsk->sighand->signalfd_wqh);
Davide Libenzifba2afa2007-05-10 22:23:13 -0700[diff] [blame]62}
63
Oleg Nesterovd80e7312012-02-24 20:07:11 +0100[diff] [blame]64extern void signalfd_cleanup(struct sighand_struct *sighand);
65
Davide Libenzifba2afa2007-05-10 22:23:13 -0700[diff] [blame]66#else /* CONFIG_SIGNALFD */
67
Davide Libenzib8fceee2007-09-20 12:40:16 -0700[diff] [blame]68static inline void signalfd_notify(struct task_struct *tsk, int sig) { }
Davide Libenzifba2afa2007-05-10 22:23:13 -0700[diff] [blame]69
Oleg Nesterovd80e7312012-02-24 20:07:11 +0100[diff] [blame]70static inline void signalfd_cleanup(struct sighand_struct *sighand) { }
71
Davide Libenzifba2afa2007-05-10 22:23:13 -0700[diff] [blame]72#endif /* CONFIG_SIGNALFD */
73
74#endif /* __KERNEL__ */
75
76#endif /* _LINUX_SIGNALFD_H */