io_submit - submit asynchronous I/O blocks for processing
#include <linux/aio_abi.h> /* Defines needed types */
int io_submit(aio_context_t ctx_id, long nr, struct iocb **iocbpp);
: There is no glibc wrapper for this system call; see NOTES.
() system call queues nr
I/O request blocks for
processing in the AIO context ctx_id
. The iocbpp
be an array of nr
AIO control blocks, which will be submitted to
On success, io_submit
() returns the number of iocb
(which may be less than nr
, or 0 if nr
is zero). For the failure
return, see NOTES.
- Insufficient resources are available to queue any
- The file descriptor specified in the first iocb is
- One of the data structures points to invalid data.
- The AIO context specified by ctx_id is invalid.
nr is less than 0. The iocb at *iocbpp is not
properly initialized, or the operation specified is invalid for the file
descriptor in the iocb.
- io_submit() is not implemented on this
The asynchronous I/O system calls first appeared in Linux 2.5.
() is Linux-specific and should not be used in programs that are
intended to be portable.
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
() wrapper function provided by libaio
Note that the libaio
wrapper function uses a different type
) for the ctx_id
argument. Note also that the
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
(2), then the return value follows the usual conventions for
indicating an error: -1, with errno
set to a (positive) value that
indicates the error.
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