Getting started

Since TPO++ provides a interface syntactically and semantically close to MPI, we assume the reader to be familiar with basic MPI concepts, including communicator, ranks, tag etc. More advanced MPI concepts provided in TPO++ will be explained in more detail.

The usual hello world example in TPO++ can be found below:

#include <iostream>
#include <tpo++.H>

int main(int argc, char *argv[]) {
    TPO::init(&argc, &argv);

    cout << "Hello world from host " << TPO::CommWorld.rank() << endl;
}

All objects, functions and global variables of TPO++ are encapsulated in a namespace TPO. To use them, you have to provide a prefix TPO::. In the example above, the global initialization function TPO::init is used to start up the message-passing environment. Each host prints ``hello world'' message and its own communication rank, using the rank() method of the global object TPO::CommWorld. An alternative would be to state using namespace TPO to import all TPO++ symbols into the default namespace. For clarity, all our examples use the explicit TPO:: prefix.