Originální popis anglicky:
aio_return - retrieve return status of an asynchronous I/O operation (
REALTIME)
Návod, kniha: POSIX Programmer's Manual
#include <aio.h>
ssize_t aio_return(struct aiocb *
aiocbp);
The
aio_return() function shall return the return status associated with
the
aiocb structure referenced by the
aiocbp argument. The
return status for an asynchronous I/O operation is the value that would be
returned by the corresponding
read(),
write(), or
fsync()
function call. If the error status for the operation is equal to
[EINPROGRESS], then the return status for the operation is undefined. The
aio_return() function may be called exactly once to retrieve the return
status of a given asynchronous operation; thereafter, if the same
aiocb
structure is used in a call to
aio_return() or
aio_error(), an
error may be returned. When the
aiocb structure referred to by
aiocbp is used to submit another asynchronous operation, then
aio_return() may be successfully used to retrieve the return status of
that operation.
If the asynchronous I/O operation has completed, then the return status, as
described for
read(),
write(), and
fsync(), shall be
returned. If the asynchronous I/O operation has not yet completed, the results
of
aio_return() are undefined.
The
aio_return() function may fail if:
- EINVAL
- The aiocbp argument does not refer to an
asynchronous operation whose return status has not yet been retrieved.
The following sections are informative.
None.
The
aio_return() function is part of the Asynchronous Input and Output
option and need not be available on all implementations.
None.
None.
aio_cancel() ,
aio_error() ,
aio_fsync() ,
aio_read() ,
aio_write() ,
close() ,
exec() ,
exit() ,
fork() ,
lio_listio() ,
lseek() ,
read() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<aio.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
