[linux-2.6-block.git] / include / linux / signalfd.h

/*
 *  include/linux/signalfd.h
 *
 *  Copyright (C) 2007  Davide Libenzi <davidel@xmailserver.org>
 *
 */

#ifndef _LINUX_SIGNALFD_H
#define _LINUX_SIGNALFD_H

#include <linux/types.h>
/* For O_CLOEXEC and O_NONBLOCK */
#include <linux/fcntl.h>

/* Flags for signalfd4.  */
#define SFD_CLOEXEC O_CLOEXEC
#define SFD_NONBLOCK O_NONBLOCK

struct signalfd_siginfo {
	__u32 ssi_signo;
	__s32 ssi_errno;
	__s32 ssi_code;
	__u32 ssi_pid;
	__u32 ssi_uid;
	__s32 ssi_fd;
	__u32 ssi_tid;
	__u32 ssi_band;
	__u32 ssi_overrun;
	__u32 ssi_trapno;
	__s32 ssi_status;
	__s32 ssi_int;
	__u64 ssi_ptr;
	__u64 ssi_utime;
	__u64 ssi_stime;
	__u64 ssi_addr;

	/*
	 * Pad strcture to 128 bytes. Remember to update the
	 * pad size when you add new members. We use a fixed
	 * size structure to avoid compatibility problems with
	 * future versions, and we leave extra space for additional
	 * members. We use fixed size members because this strcture
	 * comes out of a read(2) and we really don't want to have
	 * a compat on read(2).
	 */
	__u8 __pad[48];
};


#ifdef __KERNEL__

#ifdef CONFIG_SIGNALFD

/*
 * Deliver the signal to listening signalfd.
 */
static inline void signalfd_notify(struct task_struct *tsk, int sig)
{
	if (unlikely(waitqueue_active(&tsk->sighand->signalfd_wqh)))
		wake_up(&tsk->sighand->signalfd_wqh);
}

#else /* CONFIG_SIGNALFD */

static inline void signalfd_notify(struct task_struct *tsk, int sig) { }

#endif /* CONFIG_SIGNALFD */

#endif /* __KERNEL__ */

#endif /* _LINUX_SIGNALFD_H */
Commit	Line	Data
fba2afaa DL	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
a788fd53	11	#include <linux/types.h>
5fb5e049	12	/* For O_CLOEXEC and O_NONBLOCK */
9deb27ba UD	13	#include <linux/fcntl.h>
	14
	15	/* Flags for signalfd4. */
	16	#define SFD_CLOEXEC O_CLOEXEC
5fb5e049	17	#define SFD_NONBLOCK O_NONBLOCK
fba2afaa DL	18
fba2afaa DL	19	struct signalfd_siginfo {
96358de6 DL	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;
fba2afaa DL	36
	37	/*
	38	* Pad strcture to 128 bytes. Remember to update the
14e4a0f2	39	* pad size when you add new members. We use a fixed
fba2afaa DL	40	* size structure to avoid compatibility problems with
	41	* future versions, and we leave extra space for additional
	42	* members. We use fixed size members because this strcture
	43	* comes out of a read(2) and we really don't want to have
	44	* a compat on read(2).
	45	*/
	46	__u8 __pad[48];
	47	};
	48
	49
	50	#ifdef __KERNEL__
	51
	52	#ifdef CONFIG_SIGNALFD
	53
	54	/*
b8fceee1	55	* Deliver the signal to listening signalfd.
fba2afaa DL	56	*/
	57	static inline void signalfd_notify(struct task_struct *tsk, int sig)
	58	{
b8fceee1 DL	59	if (unlikely(waitqueue_active(&tsk->sighand->signalfd_wqh)))
b8fceee1 DL	60	wake_up(&tsk->sighand->signalfd_wqh);
fba2afaa DL	61	}
	62
	63	#else /* CONFIG_SIGNALFD */
	64
b8fceee1	65	static inline void signalfd_notify(struct task_struct *tsk, int sig) { }
fba2afaa DL	66
	67	#endif /* CONFIG_SIGNALFD */
	68
	69	#endif /* __KERNEL__ */
	70
	71	#endif /* _LINUX_SIGNALFD_H */
	72