AIO_RETURN(3) Linux Programmer's Manual AIO_RETURN(3)
NAME
aio_return - get return status of asynchronous I/O operation
SYNOPSIS
#include <aio.h>
ssize_t aio_return(struct aiocb *aiocbp);
Link with -lrt.
DESCRIPTION
The aio_return() function returns the final return status for the asynchronous I/O request with control block pointed to by aiocbp. (See
aio(7) for a description of the aiocb structure.)
This function should be called only once for any given request, after aio_error(3) returns something other than EINPROGRESS.
RETURN VALUE
If the asynchronous I/O operation has completed, this function returns the value that would have been returned in case of a synchronous
read(2), write(2), fsync(2) or fdatasync(2), call. On error, -1 is returned, and errno is set appropriately.
If the asynchronous I/O operation has not yet completed, the return value and effect of aio_return() are undefined.
ERRORS
EINVAL aiocbp does not point at a control block for an asynchronous I/O request of which the return status has not been retrieved yet.
ENOSYS aio_return() is not implemented.
VERSIONS
The aio_return() function is available since glibc 2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
+-------------+---------------+---------+
|Interface | Attribute | Value |
+-------------+---------------+---------+
|aio_return() | Thread safety | MT-Safe |
+-------------+---------------+---------+
CONFORMING TO
POSIX.1-2001, POSIX.1-2008.
EXAMPLE
See aio(7).
SEE ALSO
aio_cancel(3), aio_error(3), aio_fsync(3), aio_read(3), aio_suspend(3), aio_write(3), lio_listio(3), aio(7)
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
2017-09-15 AIO_RETURN(3)