98 строки
2.1 KiB
C
98 строки
2.1 KiB
C
|
/*
|
||
|
|
* include/linux/signalfd.h
|
||
|
|
*
|
||
|
|
* Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org>
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _LINUX_SIGNALFD_H
|
||
|
|
#define _LINUX_SIGNALFD_H
|
||
|
|
|
||
|
|
|
||
|
|
struct signalfd_siginfo {
|
||
|
|
__u32 signo;
|
||
|
|
__s32 err;
|
||
|
|
__s32 code;
|
||
|
|
__u32 pid;
|
||
|
|
__u32 uid;
|
||
|
|
__s32 fd;
|
||
|
|
__u32 tid;
|
||
|
|
__u32 band;
|
||
|
|
__u32 overrun;
|
||
|
|
__u32 trapno;
|
||
|
|
__s32 status;
|
||
|
|
__s32 svint;
|
||
|
|
__u64 svptr;
|
||
|
|
__u64 utime;
|
||
|
|
__u64 stime;
|
||
|
|
__u64 addr;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Pad strcture to 128 bytes. Remember to update the
|
||
|
|
* pad size when you add new memebers. 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. This must be called
|
||
|
|
* with the sighand lock held. Same are the following that end up
|
||
|
|
* calling signalfd_deliver().
|
||
|
|
*/
|
||
|
|
void signalfd_deliver(struct task_struct *tsk, int sig);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* No need to fall inside signalfd_deliver() if no signal listeners
|
||
|
|
* are available.
|
||
|
|
*/
|
||
|
|
static inline void signalfd_notify(struct task_struct *tsk, int sig)
|
||
|
|
{
|
||
|
|
if (unlikely(!list_empty(&tsk->sighand->signalfd_list)))
|
||
|
|
signalfd_deliver(tsk, sig);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The signal -1 is used to notify the signalfd that the sighand
|
||
|
|
* is on its way to be detached.
|
||
|
|
*/
|
||
|
|
static inline void signalfd_detach_locked(struct task_struct *tsk)
|
||
|
|
{
|
||
|
|
if (unlikely(!list_empty(&tsk->sighand->signalfd_list)))
|
||
|
|
signalfd_deliver(tsk, -1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void signalfd_detach(struct task_struct *tsk)
|
||
|
|
{
|
||
|
|
struct sighand_struct *sighand = tsk->sighand;
|
||
|
|
|
||
|
|
if (unlikely(!list_empty(&sighand->signalfd_list))) {
|
||
|
|
spin_lock_irq(&sighand->siglock);
|
||
|
|
signalfd_deliver(tsk, -1);
|
||
|
|
spin_unlock_irq(&sighand->siglock);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#else /* CONFIG_SIGNALFD */
|
||
|
|
|
||
|
|
#define signalfd_deliver(t, s) do { } while (0)
|
||
|
|
#define signalfd_notify(t, s) do { } while (0)
|
||
|
|
#define signalfd_detach_locked(t) do { } while (0)
|
||
|
|
#define signalfd_detach(t) do { } while (0)
|
||
|
|
|
||
|
|
#endif /* CONFIG_SIGNALFD */
|
||
|
|
|
||
|
|
#endif /* __KERNEL__ */
|
||
|
|
|
||
|
|
#endif /* _LINUX_SIGNALFD_H */
|
||
|
|
|