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
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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), signal-safety(7).