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diy: Add support for MPI_COMM_NULL.

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This commit is contained in:
Utkarsh Ayachit 2017-12-05 16:43:16 -05:00
parent 6a4edd87f7
commit 42d5be319b
1 changed files with 1 additions and 1 deletions
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2
diy/include/diy/mpi/communicator.hpp
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@ -9,7 +9,7 @@ namespace mpi
{
public:
communicator(MPI_Comm comm = MPI_COMM_WORLD):
comm_(comm) { MPI_Comm_rank(comm_, &rank_); MPI_Comm_size(comm_, &size_); }
comm_(comm), rank_(0), size_(1) { if (comm != MPI_COMM_NULL) { MPI_Comm_rank(comm_, &rank_); MPI_Comm_size(comm_, &size_); } }
int rank() const { return rank_; }
int size() const { return size_; }