| .TH aio_return 3 2002-09-12 "Linux 2.4" Linux AIO" |
| .SH NAME |
| aio_return \- Retrieve status of asynchronous I/O operation |
| .SH SYNOPSYS |
| .nf |
| .B #include <errno.h> |
| .sp |
| .br |
| .B #include <aio.h> |
| .sp |
| .br |
| .BI "ssize_t aio_return (const struct aiocb *aiocbp)" |
| .fi |
| .SH DESCRIPTION |
| This function can be used to retrieve the return status of the operation |
| carried out by the request described in the variable pointed to by |
| .IR aiocbp |
| . As long as the error status of this request as returned |
| by |
| .IR aio_error |
| is |
| .IR EINPROGRESS |
| the return of this function is |
| undefined. |
| |
| Once the request is finished this function can be used exactly once to |
| retrieve the return value. Following calls might lead to undefined |
| behavior. |
| When the sources are compiled with |
| .B "_FILE_OFFSET_BITS == 64" |
| this function is in fact |
| .IR aio_return64 |
| since the LFS interface |
| transparently replaces the normal implementation. |
| .SH "RETURN VALUES" |
| The return value itself is the value which would have been |
| returned by the |
| .IR read |
| , |
| .IR write |
| , or |
| .IR fsync |
| call. |
| .SH ERRORS |
| The function can return |
| .TP |
| .B ENOSYS |
| if it is not implemented. |
| .TP |
| .B EINVAL |
| if the |
| .IR aiocbp |
| parameter does not |
| refer to an asynchronous operation whose return status is not yet known. |
| .SH "SEE ALSO" |
| .BR aio(3), |
| .BR aio_cancel(3), |
| .BR aio_cancel64(3), |
| .BR aio_error(3), |
| .BR aio_error64(3), |
| .BR aio_fsync(3), |
| .BR aio_fsync64(3), |
| .BR aio_init(3), |
| .BR aio_read(3), |
| .BR aio_read64(3), |
| .BR aio_return64(3), |
| .BR aio_suspend(3), |
| .BR aio_suspend64(3), |
| .BR aio_write(3), |
| .BR aio_write64(3), |
| .BR errno(3), |
