How do I make vectored AIO calls?

On May 8, 1:22 pm, "rupertlssm...@googlemail.com"
<rupertlssm...@googlemail.com> wrote:[color=blue]
> Hi,
>
> Please forgive my ignorance of the linux file system API; I've
> obviously spent far too long in Java land! I have been working on a
> Java/C implementation of the Java NIO.2 specification (JSR 203 I
> think), and have implemented asynchronous file IO using the Posix API
> exposed in 'aio.h'.
>
> The Posix API does not expose vectored asynchronous reads and writes
> (aio_readv and aio_writev). I do know that the Linux kernel supports
> vectored asynchronous io (I'm on 2.6.22), and I have checked the
> source to see that patches for this are in fact there. So my question
> is, where is the API to use this? I'm guessing that I need to use the
> linux native filesystem API and pass it a structure with flags set
> correctly in it to request the style of io operation I am after. Do I
> do this though a call to readv/writev? How are asynchronous completion
> notifications delivered? A small example or pointers to where I can
> learn more would be very much appreciated. Thanks for any help you can
> give.
>
> Rupert
>
> P.S. I can obviously do the vectored calls through the Posix API by
> copying blocks of memory, but that kind of misses the point.[/color]

OK. I think I figured this one out for myself. I need to install
libaio, and the API calls to use it are exposed in 'libaio.h'.

Rupert