opensolaris man page for aio_return

aio_return(3C)						   Standard C Library Functions 					    aio_return(3C)

NAME
       aio_return - retrieve return status of an asynchronous I/O operation

SYNOPSIS
       #include <aio.h>

       ssize_t aio_return(struct aiocb *aiocbp);

DESCRIPTION
       The  aio_return() function returns the return status associated with the aiocb structure referenced by the aiocbp argument. The return sta-
       tus for an asynchronous I/O operation is the value that would be returned by the corresponding read(2),	write(2),  or  fsync(3C)  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(3C), 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 VALUES
       If the asynchronous I/O operation has completed, then the return status, as described for read(2), write(2), and fsync(3C), is returned. If
       the asynchronous I/O operation has not yet completed, the results of aio_return() are undefined.

ERRORS
       The aio_return() function will fail if:

       EINVAL	 The aiocbp argument does not refer to an asynchronous operation whose return status has not yet been retrieved.

       ENOSYS	 The aio_return() function is not supported by the system.

USAGE
       The aio_return() function has a transitional interface for 64-bit file offsets.	See lf64(5).

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |ATTRIBUTE TYPE		     |ATTRIBUTE VALUE		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Async-Signal-Safe 	   |
       +-----------------------------+-----------------------------+
       |Standard		     |See standards(5). 	   |
       +-----------------------------+-----------------------------+

SEE ALSO
       close(2), exec(2), exit(2), fork(2), lseek(2), read(2), write(2), fsync(3C), aio.h(3HEAD), signal.h(3HEAD), aio_cancel(3C),  aio_fsync(3C),
       aio_read(3C), lio_listio(3C), attributes(5), lf64(5), standards(5)

NOTES
       Solaris 2.6 was the first release to support the Asynchronous Input and Output option. Prior to this release, this function always returned
       -1 and set errno to ENOSYS.

SunOS 5.11							    5 Feb 2008							    aio_return(3C)