collatedFileOperation.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2017 OpenFOAM Foundation
    Copyright (C) 2019-2021 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::fileOperations::collatedFileOperation
 
Description
    Version of masterUncollatedFileOperation that collates regIOobjects
    into a container in the processors/ subdirectory.
 
    Uses threading if maxThreadFileBufferSize != 0.
        > 0 : Can use mpi inside thread to collect data if buffer is not
              large enough. Does need full thread support inside MPI.
 
        < 0 : special : -maxThreadFileBufferSize is guaranteed large enough
              for all writing. Initialises MPI without thread support.
 
See also
    masterUncollatedFileOperation
 
SourceFiles
    collatedFileOperation.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef fileOperations_collatedFileOperation_H
#define fileOperations_collatedFileOperation_H
 
#include "masterUncollatedFileOperation.H"
#include "OFstreamCollator.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace fileOperations
{
 
/*---------------------------------------------------------------------------*\
                    Class collatedFileOperation Declaration
\*---------------------------------------------------------------------------*/
 
class collatedFileOperation
:
    public masterUncollatedFileOperation
{
protected:
 
    // Protected Data
 
        //- Any communicator allocated by me
        const label myComm_;
 
        //- Threaded writer
        mutable OFstreamCollator writer_;
 
        // For non-parallel operation
 
            //- Number of processors (overall)
            label nProcs_;
 
            //- Ranks of IO handlers
            const labelList ioRanks_;
 
 
    // Protected Member Functions
 
        //- Print banner information, optionally with io ranks
        void printBanner(const bool printRanks = false) const;
 
        //- Is proci master of communicator (in parallel) or master of
        //- the io ranks (non-parallel)
        bool isMasterRank(const label proci) const;
 
        //- Append to processorsNN/ file
        bool appendObject
        (
            const regIOobject& io,
            const fileName& pathName,
            IOstreamOption streamOpt
        ) const;
 
 
public:
 
        //- Runtime type information
        TypeName("collated");
 
 
    // Static Data
 
        //- Max size of thread buffer size. This is the overall size of
        //  all files to be written. Starts blocking if not enough size.
        //  Read as float to enable easy specification of large sizes.
        static float maxThreadFileBufferSize;
 
 
    // Constructors
 
        //- Default construct
        explicit collatedFileOperation(bool verbose);
 
        //- Construct from user communicator
        collatedFileOperation
        (
            const label comm,
            const labelList& ioRanks,
            const word& typeName,
            bool verbose
        );
 
 
    //- Destructor
    virtual ~collatedFileOperation();
 
 
    // Member Functions
 
        // (reg)IOobject functionality
 
            //- Generate disk file name for object. Opposite of filePath.
            virtual fileName objectPath
            (
                const IOobject& io,
                const word& typeName
            ) const;
 
            //- Writes a regIOobject (so header, contents and divider).
            //  Returns success state.
            virtual bool writeObject
            (
                const regIOobject&,
                IOstreamOption streamOpt = IOstreamOption(),
                const bool valid = true
            ) const;
 
        // Other
 
            //- Forcibly wait until all output done. Flush any cached data
            virtual void flush() const;
 
            //- Actual name of processors dir
            virtual word processorsDir(const IOobject&) const;
 
            //- Actual name of processors dir
            virtual word processorsDir(const fileName&) const;
 
            //- Set number of processor directories/results.
            //- Only used in decomposePar
            virtual void setNProcs(const label nProcs);
};
 
 
/*---------------------------------------------------------------------------*\
               Class collatedFileOperationInitialise Declaration
\*---------------------------------------------------------------------------*/
 
class collatedFileOperationInitialise
:
    public masterUncollatedFileOperationInitialise
{
public:
 
    // Constructors
 
        //- Construct from components
        collatedFileOperationInitialise(int& argc, char**& argv)
        :
            masterUncollatedFileOperationInitialise(argc, argv)
        {}
 
 
    //- Destructor
    virtual ~collatedFileOperationInitialise() = default;
 
 
    // Member Functions
 
        //- Requires threading for non-zero maxThreadFileBufferSize
        virtual bool needsThreading() const
        {
            return (collatedFileOperation::maxThreadFileBufferSize > 0);
        }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace fileOperations
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //