2004-11-03 13:51:07 +00:00
|
|
|
.\" Copyright (C) 2003 Free Software Foundation, Inc.
|
|
|
|
|
.\" This file is distributed according to the GNU General Public License.
|
|
|
|
|
.\" See the file COPYING in the top level source directory for details.
|
|
|
|
|
.\"
|
|
|
|
|
.de Sh \" Subsection
|
|
|
|
|
.br
|
|
|
|
|
.if t .Sp
|
|
|
|
|
.ne 5
|
|
|
|
|
.PP
|
|
|
|
|
\fB\\$1\fR
|
|
|
|
|
.PP
|
|
|
|
|
..
|
|
|
|
|
.de Sp \" Vertical space (when we can't use .PP)
|
|
|
|
|
.if t .sp .5v
|
|
|
|
|
.if n .sp
|
|
|
|
|
..
|
|
|
|
|
.de Ip \" List item
|
|
|
|
|
.br
|
|
|
|
|
.ie \\n(.$>=3 .ne \\$3
|
|
|
|
|
.el .ne 3
|
|
|
|
|
.IP "\\$1" \\$2
|
|
|
|
|
..
|
|
|
|
|
.TH "IO_CANCEL" 2 "2003-02-21" "Linux 2.4" "Linux Programmer's Manual"
|
|
|
|
|
.SH NAME
|
|
|
|
|
io_cancel \- Cancel an outstanding asynchronous I/O operation
|
|
|
|
|
.SH "SYNOPSIS"
|
|
|
|
|
.ad l
|
|
|
|
|
.hy 0
|
|
|
|
|
|
2006-12-01 04:23:44 +00:00
|
|
|
#include <libaio.>
|
|
|
|
|
.\"#include <linux/aio.h>
|
2004-11-03 13:51:07 +00:00
|
|
|
.sp
|
|
|
|
|
.HP 16
|
2006-12-01 04:23:44 +00:00
|
|
|
int\ \fBio_cancel\fR\ (aio_context_t\ \fIctx_id\fR, struct\ iocb\ \fI*iocb\fR, struct\ io_event\ \fI*result\fR);
|
2004-11-03 13:51:07 +00:00
|
|
|
.ad
|
|
|
|
|
.hy
|
|
|
|
|
|
|
|
|
|
.SH "DESCRIPTION"
|
|
|
|
|
|
|
|
|
|
.PP
|
2005-10-19 06:54:38 +00:00
|
|
|
\fBio_cancel\fR() attempts to cancel an asynchronous I/O operation
|
2004-11-03 13:51:07 +00:00
|
|
|
previously submitted with the \fBio_submit\fR system call.
|
|
|
|
|
\fIctx_id\fR is the AIO context ID of the operation to be cancelled.
|
|
|
|
|
If the AIO context is found, the event will be cancelled and then copied
|
|
|
|
|
into the memory pointed to by \fIresult\fR without being placed
|
|
|
|
|
into the completion queue.
|
|
|
|
|
|
|
|
|
|
.SH "RETURN VALUE"
|
|
|
|
|
|
|
|
|
|
.PP
|
2005-10-19 06:54:38 +00:00
|
|
|
\fBio_cancel\fR() returns 0 on success; otherwise, it returns one of the
|
2004-11-03 13:51:07 +00:00
|
|
|
errors listed in the "Errors" section.
|
|
|
|
|
|
|
|
|
|
.SH "ERRORS"
|
|
|
|
|
|
|
|
|
|
.TP
|
|
|
|
|
EINVAL
|
|
|
|
|
The AIO context specified by \fIctx_id\fR is invalid.
|
|
|
|
|
|
|
|
|
|
.TP
|
|
|
|
|
EFAULT
|
|
|
|
|
One of the data structures points to invalid data.
|
|
|
|
|
|
|
|
|
|
.TP
|
|
|
|
|
EAGAIN
|
|
|
|
|
The \fIiocb\fR specified was not cancelled.
|
|
|
|
|
|
|
|
|
|
.TP
|
|
|
|
|
ENOSYS
|
2005-10-19 06:54:38 +00:00
|
|
|
\fBio_cancel\fR() is not implemented on this architecture.
|
2004-11-03 13:51:07 +00:00
|
|
|
|
|
|
|
|
.SH "VERSIONS"
|
|
|
|
|
|
|
|
|
|
.PP
|
|
|
|
|
The asynchronous I/O system calls first appeared in Linux 2.5, August 2002.
|
|
|
|
|
|
|
|
|
|
.SH "CONFORMING TO"
|
|
|
|
|
|
|
|
|
|
.PP
|
2006-12-27 03:54:41 +00:00
|
|
|
\fBio_cancel\fR() is Linux specific and should not be used
|
|
|
|
|
in programs that are intended to be portable.
|
2004-11-03 13:51:07 +00:00
|
|
|
|
|
|
|
|
.SH "SEE ALSO"
|
|
|
|
|
|
|
|
|
|
.PP
|
2006-12-27 03:54:41 +00:00
|
|
|
\fBio_setup\fR(2), \fBio_destroy\fR(2), \fBio_getevents\fR(2),
|
|
|
|
|
\fBio_submit\fR(2).
|
2004-11-03 13:51:07 +00:00
|
|
|
|
|
|
|
|
.SH "NOTES"
|
|
|
|
|
|
|
|
|
|
.PP
|
|
|
|
|
The asynchronous I/O system calls were written by Benjamin LaHaise.
|
|
|
|
|
|
|
|
|
|
.SH AUTHOR
|
|
|
|
|
Kent Yoder.
|
