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