Using MPI...

[A***@gmail.com]

Hi,

I have a application that allows you to hook up external DLL for
functionality. I want to create an external DLL that uses MPI. So,
is it possible for me to call MPI_Init inside the dll as opposed to
the main application. This would be equivalent to me calling a
function inside the application. It can be executed multiple times:


int my_mpi_function ()
{
MPI_Init....();

}

[A***@gmail.com]

Never mind, found that you can only call MPI_Init once and only once

[Heiko Bauke]

Hi,

On Wed, 14 Nov 2007 09:12:07 -0800

Post by A***@gmail.com
Never mind, found that you can only call MPI_Init once and only once

you can test if MPI_Init has already been called by MPI_Initialized, see
http://www.mpi-forum.org/docs/mpi-11-html/node151.html


Heiko

[David Cronk]

You can call MPI_Init from anywhere, but only once. For this type of
situation you may want to do:

MPI_Initialized (&flag);
if (!flag)
MPI_Init ();

This ensures you only call MPI_Init once.

Hope this helps.

Dave.

Post by A***@gmail.com
Hi,
I have a application that allows you to hook up external DLL for
functionality. I want to create an external DLL that uses MPI. So,
is it possible for me to call MPI_Init inside the dll as opposed to
the main application. This would be equivalent to me calling a
int my_mpi_function ()
{
MPI_Init....();
}