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// https://www.boost.org/doc/libs/1_67_0/doc/html/mpi/tutorial.html
#include <boost/mpi.hpp>
#include <iostream>
#include <string>
#include <boost/serialization/string.hpp>
namespace mpi = boost::mpi;
int main()
{
mpi::environment env;
mpi::communicator world;
if (world.rank() == 0)
{
mpi::request reqs[2];
std::string msg, out_msg = "Hello";
reqs[0] = world.isend(1, 0, out_msg);
reqs[1] = world.irecv(1, 1, msg);
mpi::wait_all(reqs, reqs + 2);
std::cout << msg << "!" << std::endl;
}
else
{
mpi::request reqs[2];
std::string msg, out_msg = "world";
reqs[0] = world.isend(0, 1, out_msg);
reqs[1] = world.irecv(0, 0, msg);
mpi::wait_all(reqs, reqs + 2);
std::cout << msg << ", ";
}
return 0;
}
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