2 * include/linux/signalfd.h
4 * Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org>
8 #ifndef _LINUX_SIGNALFD_H
9 #define _LINUX_SIGNALFD_H
11 /* For O_CLOEXEC and O_NONBLOCK */
12 #include <linux/fcntl.h>
14 /* Flags for signalfd4. */
15 #define SFD_CLOEXEC O_CLOEXEC
16 #define SFD_NONBLOCK O_NONBLOCK
18 struct signalfd_siginfo {
37 * Pad strcture to 128 bytes. Remember to update the
38 * pad size when you add new members. We use a fixed
39 * size structure to avoid compatibility problems with
40 * future versions, and we leave extra space for additional
41 * members. We use fixed size members because this strcture
42 * comes out of a read(2) and we really don't want to have
43 * a compat on read(2).
51 #ifdef CONFIG_SIGNALFD
54 * Deliver the signal to listening signalfd.
56 static inline void signalfd_notify(struct task_struct *tsk, int sig)
58 if (unlikely(waitqueue_active(&tsk->sighand->signalfd_wqh)))
59 wake_up(&tsk->sighand->signalfd_wqh);
62 #else /* CONFIG_SIGNALFD */
64 static inline void signalfd_notify(struct task_struct *tsk, int sig) { }
66 #endif /* CONFIG_SIGNALFD */
68 #endif /* __KERNEL__ */
70 #endif /* _LINUX_SIGNALFD_H */