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Linux 2.6 - man page for aio_return (linux section 3)

AIO_RETURN(3)			    Linux Programmer's Manual			    AIO_RETURN(3)

NAME
       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 fdata-
       sync(2), call.

       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
   Multithreading (see pthreads(7))
       The aio_return() function is thread-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
       This  page  is  part of release 3.55 of the Linux man-pages project.  A description of the
       project,    and	  information	 about	  reporting    bugs,	can    be    found     at
       http://www.kernel.org/doc/man-pages/.

					    2013-07-04				    AIO_RETURN(3)


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