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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2017-2026 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
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::decomposedBlockData
Description
decomposedBlockData is a List<char> with IO on the master processor only.
SourceFiles
decomposedBlockData.C
\*---------------------------------------------------------------------------*/
#ifndef decomposedBlockData_H
#define decomposedBlockData_H
#include "IOList.H"
#include "regIOobject.H"
#include "UPstream.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
/*---------------------------------------------------------------------------*\
Class decomposedBlockData Declaration
\*---------------------------------------------------------------------------*/
class decomposedBlockData
:
public regIOobject,
public List<char>
{
protected:
// Protected data
//- Type to use for gather
const UPstream::commsTypes commsType_;
//- Communicator for all parallel comms
const label comm_;
// Protected Member Functions
//- Helper: determine number of processors whose recvSizes fits
// ito maxBufferSize
static label calcNumProcs
(
const label comm,
const off_t maxBufferSize,
const labelUList& recvSizes,
const label startProci
);
//- Read data into *this. ISstream is only valid on master.
static bool readBlocks
(
const label comm,
autoPtr<ISstream>& isPtr,
List<char>& data,
const UPstream::commsTypes commsType
);
public:
TypeName("decomposedBlockData");
// Constructors
//- Construct given an IOobject
decomposedBlockData
(
const label comm,
const IOobject&,
const UPstream::commsTypes = UPstream::commsTypes::scheduled
);
//- Construct given an IOobject and for READ_IF_MODIFIED a List<char>
decomposedBlockData
(
const label comm,
const IOobject&,
const UList<char>&,
const UPstream::commsTypes = UPstream::commsTypes::scheduled
);
//- Move construct by transferring the IOList contents
decomposedBlockData
(
const label comm,
const IOobject&,
List<char>&&,
const UPstream::commsTypes = UPstream::commsTypes::scheduled
);
//- Destructor
virtual ~decomposedBlockData();
// Member Functions
//- Read object
virtual bool read();
//- Write separated content. Assumes content is the serialised data
// and that the master data contains a header
virtual bool writeData(Ostream&) const;
//- Write using given format, version and compression
virtual bool writeObject
(
IOstream::streamFormat,
IOstream::versionNumber,
IOstream::compressionType,
const bool write
) const;
// Helpers
//- Read header. Call only on master.
static bool readMasterHeader(IOobject&, Istream&);
//- Read selected block (non-seeking) + header information
static autoPtr<ISstream> readBlock
(
const label blocki,
Istream& is,
IOobject& headerIO
);
//- Read master header information (into headerIO) and return
// data in stream. Note: isPtr is only valid on master.
static autoPtr<ISstream> readBlocks
(
const label comm,
const fileName& fName,
autoPtr<ISstream>& isPtr,
IOobject& headerIO,
const UPstream::commsTypes commsType
);
//- Helper: gather single label. Note: using native Pstream.
// datas sized with num procs but undefined contents on
// slaves
static void gather
(
const label comm,
const label data,
labelList& datas
);
//- Helper: gather data from (subset of) slaves. Returns
// recvData : received data
// recvOffsets : offset in data. recvOffsets is nProcs+1
static void gatherSlaveData
(
const label comm,
const UList<char>& data,
const labelUList& recvSizes,
const label startProc,
const label nProcs,
List<int>& recvOffsets,
List<char>& recvData
);
//- Write *this. Ostream only valid on master. Returns starts of
// processor blocks
static bool writeBlocks
(
const label comm,
autoPtr<OSstream>& osPtr,
List<std::streamoff>& start,
const UList<char>& masterData,
const labelUList& recvSizes,
// optional slave data (on master)
const PtrList<SubList<char>>& slaveData,
const UPstream::commsTypes,
const bool syncReturnState = true
);
//- Detect number of blocks in a file
static label numBlocks(const fileName&);
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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