+++ /dev/null
-.\" Copyright (C) 2006, 2010 Michael Kerrisk <mtk.manpages@gmail.com>
-.\" Copyright (C) 2009 Petr Baudis <pasky@suse.cz>
-.\"
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-.\" manual provided the copyright notice and this permission notice are
-.\" preserved on all copies.
-.\"
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-.\" manual under the conditions for verbatim copying, provided that the
-.\" entire resulting derived work is distributed under the terms of a
-.\" permission notice identical to this one.
-.\"
-.\" Since the Linux kernel and libraries are constantly changing, this
-.\" manual page may be incorrect or out-of-date. The author(s) assume no
-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein. The author(s) may not
-.\" have taken the same level of care in the production of this manual,
-.\" which is licensed free of charge, as they might when working
-.\" professionally.
-.\"
-.\" Formatted or processed versions of this manual, if unaccompanied by
-.\" the source, must acknowledge the copyright and authors of this work.
-.\" %%%LICENSE_END
-.\"
-.TH SIGEVENT 7 2011-09-09 "GNU" "Linux Programmer's Manual"
-.SH NAME
-sigevent \- structure for notification from asynchronous routines
-.SH SYNOPSIS
-.nf
-
-union sigval { /* Data passed with notification */
- int sival_int; /* Integer value */
- void *sival_ptr; /* Pointer value */
-};
-
-struct sigevent {
- int sigev_notify; /* Notification method */
- int sigev_signo; /* Notification signal */
- union sigval sigev_value; /* Data passed with
- notification */
- void (*sigev_notify_function) (union sigval);
- /* Function used for thread
- notification (SIGEV_THREAD) */
- void *sigev_notify_attributes;
- /* Attributes for notification thread
- (SIGEV_THREAD) */
- pid_t sigev_notify_thread_id;
- /* ID of thread to signal (SIGEV_THREAD_ID) */
-};
-.fi
-.SH DESCRIPTION
-.PP
-The
-.I sigevent
-structure is used by various APIs
-to describe the way a process is to be notified about an event
-(e.g., completion of an asynchronous request, expiration of a timer,
-or the arrival of a message).
-.PP
-The definition shown in the SYNOPSIS is approximate:
-some of the fields in the
-.I sigevent
-structure may be defined as part of a union.
-Programs should employ only those fields relevant
-to the value specified in
-.IR sigev_notify .
-.PP
-The
-.I sigev_notify
-field specifies how notification is to be performed.
-This field can have one of the following values:
-.TP 8
-.BR SIGEV_NONE
-A "null" notification: don't do anything when the event occurs.
-.TP
-.BR SIGEV_SIGNAL
-Notify the process by sending the signal specified in
-.IR sigev_signo .
-.IP
-If the signal is caught with a signal handler that was registered using the
-.BR sigaction (2)
-.B SA_SIGINFO
-flag, then the following fields are set in the
-.I siginfo_t
-structure that is passed as the second argument of the handler:
-.RS 8
-.TP 10
-.I si_code
-This field is set to a value that depends on the API
-delivering the notification.
-.TP
-.I si_signo
-This field is set to the signal number (i.e., the same value as in
-.IR sigev_signo ).
-.TP
-.I si_value
-This field is set to the value specified in
-.IR sigev_value .
-.RE
-.IP
-Depending on the API, other fields may also be set in the
-.I siginfo_t
-structure.
-.IP
-The same information is also available if the signal is accepted using
-.BR sigwaitinfo (2).
-.TP
-.BR SIGEV_THREAD
-Notify the process by invoking
-.I sigev_notify_function
-"as if" it were the start function of a new thread.
-(Among the implementation possibilities here are that
-each timer notification could result in the creation of a new thread,
-or that a single thread is created to receive all notifications.)
-The function is invoked with
-.I sigev_value
-as its sole argument.
-If
-.I sigev_notify_attributes
-is not NULL, it should point to a
-.I pthread_attr_t
-structure that defines attributes for the new thread (see
-.BR pthread_attr_init (3)).
-.TP
-.BR SIGEV_THREAD_ID " (Linux-specific)"
-.\" | SIGEV_SIGNAL vs not?
-Currently used only by POSIX timers; see
-.BR timer_create (2).
-.SH CONFORMING TO
-POSIX.1-2001.
-.SH SEE ALSO
-.BR timer_create (2),
-.BR aio_fsync (3),
-.BR aio_read (3),
-.BR aio_write (3),
-.BR getaddrinfo_a (3),
-.BR lio_listio (3),
-.BR mq_notify (3),
-.BR aio (7),
-.BR pthreads (7)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
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