|| POSIX Programmer's Manual
PROLOG This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
NAME aio_return - retrieve return status of an asynchronous I/O operation (
ssize_t aio_return(struct aiocb *
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
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_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.
RETURN VALUE If the asynchronous I/O operation has completed, then the return status, as described for
fsync(), shall be returned. If the asynchronous I/O operation has not yet completed, the results of
aio_return() are undefined.
() function may fail if:
aiocbp argument does not refer to an asynchronous operation whose return status has not yet been retrieved.
The following sections are informative.
APPLICATION USAGE The
aio_return() function is part of the Asynchronous Input and Output option and need not be available on all implementations.
FUTURE DIRECTIONS None.
read() , the Base Definitions volume of IEEE Std 1003.1-2001,
COPYRIGHT 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 .