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#include <mpi.h>
int Ccommcheck(int F77World, int f77comm)
{
int Np, Iam, i, OK=1;
if (sizeof(int) != sizeof(MPI_Comm)) OK=0;
else if ((MPI_Comm) F77World != MPI_COMM_WORLD) OK=0;
else
{
MPI_Comm_rank(MPI_COMM_WORLD, &Iam);
if (Iam > 1) OK = ((MPI_Comm) f77comm == MPI_COMM_NULL);
else
{
i = MPI_Comm_size((MPI_Comm) f77comm, &Np);
if (i != MPI_SUCCESS) OK = 0;
else if (Np != 2) OK = 0;
}
}
MPI_Allreduce(&OK, &i, 1, MPI_INT, MPI_MIN, MPI_COMM_WORLD);
return(i);
}
/*
* Fortran interfaces
*/
int CCOMMCHECK(int *F77World, int *f77comm)
{
return(Ccommcheck(*F77World, *f77comm));
}
int ccommcheck_(int *F77World, int *f77comm)
{
return(Ccommcheck(*F77World, *f77comm));
}
int ccommcheck(int *F77World, int *f77comm)
{
return(Ccommcheck(*F77World, *f77comm));
}
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