mirror of https://github.com/mkerrisk/man-pages
97 lines
2.4 KiB
Groff
97 lines
2.4 KiB
Groff
.\" Copyright (C) 2003 Free Software Foundation, Inc.
|
|
.\"
|
|
.\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
|
|
.\" This file is distributed according to the GNU General Public License.
|
|
.\" %%%LICENSE_END
|
|
.\"
|
|
.TH IO_DESTROY 2 2020-06-09 "Linux" "Linux Programmer's Manual"
|
|
.SH NAME
|
|
io_destroy \- destroy an asynchronous I/O context
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.BR "#include <linux/aio_abi.h>" " /* Defines needed types */"
|
|
.PP
|
|
.BI "int io_destroy(aio_context_t " ctx_id );
|
|
.fi
|
|
.PP
|
|
.IR Note :
|
|
There is no glibc wrapper for this system call; see NOTES.
|
|
.SH DESCRIPTION
|
|
.IR Note :
|
|
this page describes the raw Linux system call interface.
|
|
The wrapper function provided by
|
|
.I libaio
|
|
uses a different type for the
|
|
.I ctx_id
|
|
argument.
|
|
See NOTES.
|
|
.PP
|
|
The
|
|
.BR io_destroy ()
|
|
system call
|
|
will attempt to cancel all outstanding asynchronous I/O operations against
|
|
.IR ctx_id ,
|
|
will block on the completion of all operations
|
|
that could not be canceled, and will destroy the
|
|
.IR ctx_id .
|
|
.SH RETURN VALUE
|
|
On success,
|
|
.BR io_destroy ()
|
|
returns 0.
|
|
For the failure return, see NOTES.
|
|
.SH ERRORS
|
|
.TP
|
|
.B EFAULT
|
|
The context pointed to is invalid.
|
|
.TP
|
|
.B EINVAL
|
|
The AIO context specified by \fIctx_id\fP is invalid.
|
|
.TP
|
|
.B ENOSYS
|
|
.BR io_destroy ()
|
|
is not implemented on this architecture.
|
|
.SH VERSIONS
|
|
The asynchronous I/O system calls first appeared in Linux 2.5.
|
|
.SH CONFORMING TO
|
|
.BR io_destroy ()
|
|
is Linux-specific and should not be used in programs
|
|
that are intended to be portable.
|
|
.SH NOTES
|
|
Glibc does not provide a wrapper function for this system call.
|
|
You could invoke it using
|
|
.BR syscall (2).
|
|
But instead, you probably want to use the
|
|
.BR io_destroy ()
|
|
wrapper function provided by
|
|
.\" http://git.fedorahosted.org/git/?p=libaio.git
|
|
.IR libaio .
|
|
.PP
|
|
Note that the
|
|
.I libaio
|
|
wrapper function uses a different type
|
|
.RI ( io_context_t )
|
|
.\" But glibc is confused, since <libaio.h> uses 'io_context_t' to declare
|
|
.\" the system call.
|
|
for the
|
|
.I ctx_id
|
|
argument.
|
|
Note also that the
|
|
.I libaio
|
|
wrapper does not follow the usual C library conventions for indicating errors:
|
|
on error it returns a negated error number
|
|
(the negative of one of the values listed in ERRORS).
|
|
If the system call is invoked via
|
|
.BR syscall (2),
|
|
then the return value follows the usual conventions for
|
|
indicating an error: \-1, with
|
|
.I errno
|
|
set to a (positive) value that indicates the error.
|
|
.SH SEE ALSO
|
|
.BR io_cancel (2),
|
|
.BR io_getevents (2),
|
|
.BR io_setup (2),
|
|
.BR io_submit (2),
|
|
.BR aio (7)
|
|
.\" .SH AUTHOR
|
|
.\" Kent Yoder.
|