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#include <algorithm>
#include <ios>
#include <iostream>
#include <numeric>
#include <stdexcept>
#include <vector>
#include <adios2.h>
#if ADIOS2_USE_MPI
#include <mpi.h>
#endif
int main(int argc, char *argv[])
{
int rank, size;
#if ADIOS2_USE_MPI
int provided;
MPI_Init_thread(&argc, &argv, MPI_THREAD_MULTIPLE, &provided);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
#else
rank = 0;
size = 1;
#endif
const size_t Nx = 2, Ny = 3;
const size_t steps = 2;
std::vector<float> commonArray(Nx * Ny);
std::iota(commonArray.begin(), commonArray.end(), 4.0f);
#if ADIOS2_USE_MPI
adios2::ADIOS adios(MPI_COMM_WORLD);
#else
adios2::ADIOS adios;
#endif
/* PRIMARY file */
{
adios2::IO bpIO = adios.DeclareIO("BPcmp1");
auto bpFloats = bpIO.DefineVariable<float>("bpFloats", {size * Nx, Ny}, {rank * Nx, 0},
{Nx, Ny}, adios2::ConstantDims);
auto bpStep = bpIO.DefineVariable<unsigned int>("bpStep");
// Create the raw file with the 2D raw array and step information
adios2::Engine bpWriter = bpIO.Open("TestBPcmp_set1.bp", adios2::Mode::Write);
for (size_t i = 0; i < steps; i++)
{
bpWriter.BeginStep();
bpWriter.Put(bpFloats, commonArray.data());
bpWriter.Put(bpStep, static_cast<unsigned int>(i));
bpWriter.EndStep();
std::transform(commonArray.begin(), commonArray.end(), commonArray.begin(),
[](float &v) { return v + 1; });
}
bpWriter.Close();
}
/* SECONDARY file */
{
adios2::IO bpIO = adios.DeclareIO("BPcmp2");
auto bpFloats = bpIO.DefineVariable<float>("bpFloats", {size * Nx, Ny}, {rank * Nx, 0},
{Nx, Ny}, adios2::ConstantDims);
auto bpStep = bpIO.DefineVariable<int>("bpStep", {1}, {0}, {1});
// Create the raw file with the 2D raw array and step information
adios2::Engine bpWriter = bpIO.Open("TestBPcmp_set2.bp", adios2::Mode::Write);
for (size_t i = 0; i < steps; i++)
{
bpWriter.BeginStep();
bpWriter.Put(bpFloats, commonArray.data());
bpWriter.Put(bpStep, static_cast<int>(i));
bpWriter.EndStep();
}
bpWriter.BeginStep();
bpWriter.Put(bpStep, static_cast<int>(steps));
bpWriter.EndStep();
bpWriter.Close();
}
#if ADIOS2_USE_MPI
MPI_Finalize();
#endif
return 0;
}
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