2 .\" Copyright (c) 2002 Dag-Erling Coïdan Smørgrav
3 .\" All rights reserved.
5 .\" Redistribution and use in source and binary forms, with or without
6 .\" modification, are permitted provided that the following conditions
8 .\" 1. Redistributions of source code must retain the above copyright
9 .\" notice, this list of conditions and the following disclaimer.
10 .\" 2. Redistributions in binary form must reproduce the above copyright
11 .\" notice, this list of conditions and the following disclaimer in the
12 .\" documentation and/or other materials provided with the distribution.
13 .\" 3. The name of the author may not be used to endorse or promote products
14 .\" derived from this software without specific prior written permission.
16 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 To link into the kernel:
40 To load as a kernel loadable module:
45 facility provides system calls for asynchronous I/O.
46 It is available both as a kernel option for static inclusion and as a
47 dynamic kernel module.
49 Asynchronous I/O control buffers should be zeroed before initializing
51 This ensures all fields are initialized.
53 All asynchronous I/O control buffers contain a
57 field which can be used to request notification when an operation completes.
66 .Va sigev_notify_kqueue
67 field should contain the descriptor of the kqueue that the event should be attached
69 .Va sigev_notify_kevent_flags
73 .Dv EV_DISPATCH , and its
75 field should be set to
77 The posted kevent will contain:
78 .Bl -column ".Va filter"
79 .It Sy Member Ta Sy Value
80 .It Va ident Ta asynchronous I/O control buffer pointer
81 .It Va filter Ta Dv EVFILT_AIO
82 .It Va flags Ta Dv EV_EOF
85 .Va aio_sigevent.sigev_value
93 the information for the queued signal will include
97 field and the value stored in
98 .Va sigevent.sigev_value
107 .Va aio_sigevent.sigev_value
109 .Va aio_sigevent.sigev_notify_function
118 .Xr aio_waitcomplete 2 ,
128 facility appeared as a kernel option in
132 kernel module appeared in