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40 lines
1 KiB
C++
40 lines
1 KiB
C++
#ifndef OPENMC_MESSAGE_PASSING_H
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#define OPENMC_MESSAGE_PASSING_H
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#include <cstdint>
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#ifdef OPENMC_MPI
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#include <mpi.h>
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#endif
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#include "openmc/vector.h"
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namespace openmc {
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namespace mpi {
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extern int rank;
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extern int n_procs;
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extern bool master;
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#ifdef OPENMC_MPI
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extern MPI_Datatype source_site;
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extern MPI_Datatype collision_track_site;
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extern MPI_Comm intracomm;
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#endif
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// Calculates global indices of the bank particles
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// across all ranks using a parallel scan. This is used to write
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// the surface source file in parallel runs. It will probably
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// be used in the future for other types of bank like particles
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// in flight used to kick off transient simulations.
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//
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// More abstractly, this just takes a number from each MPI rank,
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// and returns a vector which is the exclusive parallel scan across
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// all of those numbers, having a length of the number of MPI ranks
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// plus one.
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vector<int64_t> calculate_parallel_index_vector(int64_t size);
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} // namespace mpi
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} // namespace openmc
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#endif // OPENMC_MESSAGE_PASSING_H
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