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NgMPI_Communicator by reference, check for valid mpi-comm

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This commit is contained in:
Joachim Schöberl 2020-08-02 09:25:23 +02:00
parent e4ef03caac
commit ba84439227
4 changed files with 16 additions and 4 deletions
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5
libsrc/core/mpi_wrapper.hpp
View File

@ -89,6 +89,11 @@ namespace ngcore
MPI_Comm_free(&comm);
}
bool ValidCommunicator() const
{
return valid_comm;
}
NgMPI_Comm & operator= (const NgMPI_Comm & c)
{
if (refcount)

2
libsrc/include/nginterface_v2.hpp
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@ -276,7 +276,7 @@ namespace netgen
void UpdateTopology ();
void DoArchive (Archive & archive);
NgMPI_Comm GetCommunicator() const;
const NgMPI_Comm & GetCommunicator() const;
virtual ~Ngx_Mesh();

11
libsrc/interface/nginterface_v2.cpp
View File

@ -61,8 +61,12 @@ namespace netgen
SetGlobalMesh (mesh);
}
NgMPI_Comm Ngx_Mesh :: GetCommunicator() const
{ return Valid() ? mesh->GetCommunicator() : NgMPI_Comm{}; }
const NgMPI_Comm & Ngx_Mesh :: GetCommunicator() const
{
// return Valid() ? mesh->GetCommunicator() : NgMPI_Comm{};
if (!Valid()) throw Exception("Ngx_mesh::GetCommunicator: don't have a valid mesh");
return mesh->GetCommunicator();
}
void Ngx_Mesh :: SaveMesh (ostream & ost) const
{
@ -1297,6 +1301,9 @@ void Ngx_Mesh::SetSurfaceElementOrders (int enr, int ox, int oy)
std::tuple<int,int*> Ngx_Mesh :: GetDistantProcs (int nodetype, int locnum) const
{
#ifdef PARALLEL
if (mesh->GetCommunicator().Size() == 1)
return std::tuple<int,int*>(0,nullptr);
switch (nodetype)
{
case 0:

2
libsrc/meshing/meshclass.hpp
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@ -640,7 +640,7 @@ namespace netgen
int AddEdgeDescriptor(const EdgeDescriptor & fd)
{ edgedecoding.Append(fd); return edgedecoding.Size() - 1; }
auto GetCommunicator() const { return this->comm; }
auto & GetCommunicator() const { return this->comm; }
void SetCommunicator(NgMPI_Comm acomm);
///