aio_return man page

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).

InterfaceAttributeValue
aio_return()Thread safetyMT-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 4.08 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/.

Referenced By

aio(7), aio_cancel(3), aio_error(3), aio_fsync(3), aio_read(3), aio_suspend(3), aio_write(3), lio_listio(3).

2015-03-02 Linux Programmer's Manual