Re: Send a RealArray over a Socket

Hi everyone,

Thanks for all your suggestions. I finally ended up
adding c-functions
to the smlnj runtime to send and receive a
Real64Array. I also added
appropriate wrapper functions to the smlnj basis
library to send and
receive real array slices. This seems to work fine for
me. If
interested in a patch, I will be glad to share it.

Regards
Vaishali
--- Matthew Fluet <[email protected]> wrote:

> On Thu, 16 Aug 2007, Gergely Buday wrote:
> >> I am trying to send a RealArray over a socket.
> >> However, I noticed that the sendArray function
> works
> >> only with Word8Arrays. What is the best way to
> send a
> >> large RealArray efficiently over a socket?
> >>
> >> Do I have to convert the RealArray into a
> Word8Array?
> >
> > Dear Vaishali,
> >
> > as John wrote you have to have a Word8Array to
> send it over a socket.
> > But an option would be to write a wrapper
> structure around Word8Array
> > that implements a part of RealArray's signature.
> It's not clear what
> > do you use to compute the RealArray but in an
> optimist's view it's
> > enough to implement sub, update and tabulate. And
> a simple function
> > that exports the underlying Word8Array that you
> will use only to send
> > it over a socket. What do you think of this?
> 
> The structures that match the PACK_REAL signature
> are provided by the 
> Basis Library as a convenient way of packing real
> values into a 
> Word8Array:
>    http://www.standardml.org/Basis/pack-float.html
> 
> As Gergely suggests, if you can organize your
> computation so that you 
> write the elements of the "final RealArray" directly
> into a Word8Array 
> via PackRealLittle.update, then you won't have any
> additional copying.
> 
> -Matthew
> 
> 



       
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