aio_return(3p) — Linux manual page


AIO_RETURN(3P)            POSIX Programmer's Manual           AIO_RETURN(3P)

PROLOG         top

       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         top

       aio_return — retrieve return status of an asynchronous I/O operation

SYNOPSIS         top

       #include <aio.h>

       ssize_t aio_return(struct aiocb *aiocbp);

DESCRIPTION         top

       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.

RETURN VALUE         top

       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.

       If the aio_return() function fails, it shall return −1 and set errno
       to indicate the error.

ERRORS         top

       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.

EXAMPLES         top




RATIONALE         top




SEE ALSO         top

       aio_cancel(3p), aio_error(3p), aio_fsync(3p), aio_read(3p),
       aio_write(3p), close(3p), exec(1p), exit(3p), fork(3p),
       lio_listio(3p), lseek(3p), read(3p)

       The Base Definitions volume of POSIX.1‐2008, aio.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) 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 .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see .

IEEE/The Open Group                 2013                      AIO_RETURN(3P)

Pages that refer to this page: aio.h(0p)aio_error(3p)aio_read(3p)aio_write(3p)lio_listio(3p)