aio_return - get return status of asynchronous I/O operation
Real-time library (librt, -lrt)
#include <aio.h>
ssize_t aio_return(struct aiocb *aiocbp);
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.
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 to indicate the error.
If the asynchronous I/O operation has not yet completed, the return value and effect of aio_return() are undefined.
- 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.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| aio_return () | Thread safety | MT-Safe |