io_setup — create an asynchronous I/O context
#include <linux/aio_abi.h> /* Defines needed types */
|There is no glibc wrapper for this system call; see NOTES.|
io_setup() system call
creates an asynchronous I/O context suitable for concurrently
ctx_idp argument must not point
to an AIO context that already exists, and must be
initialized to 0 prior to the call. On successful creation of
the AIO context, *
ctx_idp is filled in with the
nr_events exceeds the
user's limit of available events, as defined in
An invalid pointer is passed for
not initialized, or the specified
nr_events should be
greater than 0.
Insufficient kernel resources are available.
io_setup() is not
implemented on this architecture.
io_setup() is Linux-specific
and should not be used in programs that are intended to be
Glibc does not provide a wrapper function for this system
call. You could invoke it using syscall(2). But instead,
you probably want to use the
io_setup() wrapper function provided by
Note that the
libaio wrapper function uses
a different type (io_context_t
*) for the
ctx_idp argument. Note also
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 syscall(2), then the return
value follows the usual conventions for indicating an error:
errno set to a
(positive) value that indicates the error.
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Copyright (C) 2003 Free Software Foundation, Inc.
This file is distributed according to the GNU General Public License.