aio_return - get return status of asynchronous I/O operation
#include <aio.h>
ssize_t aio_return(struct aiocb *aiocbp);
Link with
-lrt.
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 appropriately.
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.
The
aio_return() function is available since glibc 2.1.
For an explanation of the terms used in this section, see
attributes(7).
Interface |
Attribute |
Value |
aio_return () |
Thread safety |
MT-Safe |
POSIX.1-2001, POSIX.1-2008.
See
aio(7).
aio_cancel(3),
aio_error(3),
aio_fsync(3),
aio_read(3),
aio_suspend(3),
aio_write(3),
lio_listio(3),
aio(7)