processorTopology.H

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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
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Class
    Foam::processorTopology
 
Description
    Determines/represents processor-processor connection.
    After instantiation contains the processor-processor connection table
    (globally synchronized on all processors).
 
Note
    A processorTopology is usually generated by using the \c New
    factory method, which has been wrapped into a separate header to
    minimize dependencies.
 
Warning
    Does not currently correctly support multiple processor
    patches connecting two processors.
 
SourceFiles
    processorTopologyNew.H
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_processorTopology_H
#define Foam_processorTopology_H
 
#include "labelList.H"
#include "lduSchedule.H"
#include "Map.H"
#include "UPstream.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                      Class processorTopology Declaration
\*---------------------------------------------------------------------------*/
 
class processorTopology
{
    // Private Data
 
        //- Map from neighbour proc to patch index
        //- (processor-local information!)
        Map<label> procPatchMap_;
 
        //- The neighbour processor connections (ascending order) associated
        //- with the local rank.
        //  Possibly demand-driven data.
        mutable labelList procNeighbours_;
 
        //- The complete processor to processor connection adjacency table.
        //- Globally synchronized information.
        //  Likely demand-driven data.
        mutable labelListList procAdjacencyTable_;
 
        //- Order in which the patches should be initialised/evaluated
        //- corresponding to the schedule
        lduSchedule patchSchedule_;
 
        //- The communicator used during creation of the topology
        label comm_;
 
 
    // Private Methods Functions
 
        // Could expose as public...
        // //- Map of neighbour processor to \em local boundary patch index.
        // const Map<label>& procPatchMap() const noexcept
        // {
        //     return procPatchMap_;
        // }
 
public:
 
    // Generated Methods
 
        //- Copy construct
        processorTopology(const processorTopology&) = default;
 
        //- Move construct
        processorTopology(processorTopology&&) = default;
 
        //- Copy assignment
        processorTopology& operator=(const processorTopology&) = default;
 
        //- Move assignment
        processorTopology& operator=(processorTopology&&) = default;
 
 
    // Constructors
 
        //- Default construct (empty)
        processorTopology() noexcept;
 
 
    // Static Functions
 
        //- Factory method to create topology, schedule and proc/patch maps.
        //  Scans the list of patches for processor connections corresponding
        //  to the ProcPatch type.
        template<class ProcPatch, class PatchListType>
        static processorTopology New
        (
            const PatchListType& patches,
            const label comm
        );
 
 
    // Member Functions
 
        //- The communicator used during creation of the topology
        label comm() const noexcept { return comm_; }
 
        //- The neighbour processor connections (ascending order) associated
        //- with the \em local rank.
        const labelList& procNeighbours() const;
 
        //- The complete processor to processor connection adjacency table.
        //- Globally synchronized information.
        //  Likely demand-driven data.
        const labelListList& procAdjacency() const;
 
        //- Which \em local boundary is attached to specified neighbour
        //- processor.
        //  \return -1 if not currently connected to specified processor.
        label procPatchLookup(const label proci) const
        {
            return procPatchMap_.lookup(proci, -1);
        }
 
        //- Order in which the patches should be initialised/evaluated
        //- corresponding to the schedule
        const lduSchedule& patchSchedule() const noexcept
        {
            return patchSchedule_;
        }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //