MPI.h

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#pragma once
 
namespace BaseLib::MPI
{
 
#ifdef USE_PETSC
// Reduce operations for interprocess communications while using Petsc
static inline int reduceMin(int val)
{
    int result;
    MPI_Allreduce(&val, &result, 1, MPI_INTEGER, MPI_MIN, PETSC_COMM_WORLD);
    return result;
}
#else
// Reduce operations for interprocess communications without using Petsc
static inline int reduceMin(int val)
{
    return val;
}
#endif
 
}  // namespace BaseLib::MPI