aio_return(3) - NetBSD Manual Pages

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AIO_RETURN(3)           NetBSD Library Functions Manual          AIO_RETURN(3)


NAME

     aio_return -- retrieve return status of asynchronous I/O operation (REAL-
     TIME)


LIBRARY

     POSIX Real-time Library (librt, -lrt)


SYNOPSIS

     #include <aio.h>

     ssize_t
     aio_return(struct aiocb *aiocbp);


DESCRIPTION

     The aio_return() system call returns the final status of the asynchronous
     I/O request associated with the structure pointed to by aiocbp.

     The aio_return() system call should only be called once, to obtain the
     final status of an asynchronous I/O operation once it has completed
     (aio_error(3) returns something other than EINPROGRESS).


RETURN VALUES

     If the asynchronous I/O request has completed, the status is returned as
     described in read(2), write(2), or fsync(2).  Otherwise, aio_return()
     returns -1 and sets errno to indicate the error condition.


ERRORS

     The aio_return() system call will fail if:

     [EINVAL]           The aiocbp argument does not reference a completed
                        asynchronous I/O request.


SEE ALSO

     fsync(2), read(2), write(2), aio(3)


STANDARDS

     The aio_return() system call is expected to conform to the IEEE Std
     1003.1-2001 (``POSIX.1'') standard.


HISTORY

     The aio_return() system call first appeared in NetBSD 5.0.

NetBSD 10.1                     August 13, 2011                    NetBSD 10.1