codedFunctionObject.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | www.openfoam.com
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-------------------------------------------------------------------------------
    Copyright (C) 2011-2017 OpenFOAM Foundation
    Copyright (C) 2019-2020 OpenCFD Ltd.
-------------------------------------------------------------------------------
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::functionObjects::codedFunctionObject
 
Group
    grpUtilitiesFunctionObjects
 
Description
    Provides a general interface to enable dynamic code compilation.
 
    The entries are:
    \plaintable
       codeInclude | include files
       codeOptions | include paths; inserted into EXE_INC in Make/options
       codeLibs    | link line; inserted into LIB_LIBS in Make/options
       codeData    | c++; local member data (null constructed);
       localCode   | c++; local static functions;
       codeRead    | c++; upon functionObject::read();
       codeExecute | c++; upon functionObject::execute();
       codeWrite   | c++; upon functionObject::write()
       codeEnd     | c++; upon functionObject::end();
    \endplaintable
 
Usage
    Example of function object specification:
    \verbatim
    difference
    {
        type coded;
        libs (utilityFunctionObjects);
 
        // Name of on-the-fly generated functionObject
        name writeMagU;
        codeWrite
        #{
            // Lookup U
            const volVectorField& U = mesh().lookupObject<volVectorField>("U");
            // Write
            mag(U)().write();
        #};
    }
    \endverbatim
 
See also
    Foam::functionObject
    Foam::codedBase
 
SourceFiles
    codedFunctionObject.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef functionObjects_codedFunctionObject_H
#define functionObjects_codedFunctionObject_H
 
#include "timeFunctionObject.H"
#include "codedBase.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace functionObjects
{
 
/*---------------------------------------------------------------------------*\
                     Class codedFunctionObject Declaration
\*---------------------------------------------------------------------------*/
 
class codedFunctionObject
:
    public functionObjects::timeFunctionObject,
    public codedBase
{
protected:
 
    // Protected data
 
        //- Input dictionary
        dictionary dict_;
 
        word name_;
 
        string codeData_;
        string codeRead_;
        string codeExecute_;
        string codeWrite_;
        string codeEnd_;
 
        //- Underlying functionObject
        mutable autoPtr<functionObject> redirectFunctionObjectPtr_;
 
 
    // Protected Member Functions
 
        //- Get the loaded dynamic libraries
        virtual dlLibraryTable& libs() const;
 
        //- Adapt the context for the current object
        virtual void prepare(dynamicCode&, const dynamicCodeContext&) const;
 
        //- Return a description (type + name) for the output
        virtual string description() const;
 
        //- Clear any redirected objects
        virtual void clearRedirect() const;
 
        //- The dictionary to initialize the codeContext
        virtual const dictionary& codeDict() const;
 
 
        //- No copy construct
        codedFunctionObject(const codedFunctionObject&) = delete;
 
        //- No copy assignment
        void operator=(const codedFunctionObject&) = delete;
 
 
public:
 
    // Static Data Members
 
        //- Name of the C code template to be used
        static constexpr const char* const codeTemplateC
            = "functionObjectTemplate.C";
 
        //- Name of the H code template to be used
        static constexpr const char* const codeTemplateH
            = "functionObjectTemplate.H";
 
 
    //- Runtime type information
    TypeName("coded");
 
 
    // Constructors
 
        //- Construct from Time and dictionary
        codedFunctionObject
        (
            const word& name,
            const Time& runTime,
            const dictionary& dict
        );
 
 
    //- Destructor
    virtual ~codedFunctionObject() = default;
 
 
    // Member Functions
 
        //- Dynamically compiled functionObject
        functionObject& redirectFunctionObject() const;
 
        //- Called at each ++ or += of the time-loop.
        //  postProcess overrides the usual executeControl behaviour and
        //  forces execution (used in post-processing mode)
        virtual bool execute();
 
        //- Called at each ++ or += of the time-loop.
        //  postProcess overrides the usual writeControl behaviour and
        //  forces writing always (used in post-processing mode)
        virtual bool write();
 
        //- Called when Time::run() determines that the time-loop exits.
        //  By default it simply calls execute().
        virtual bool end();
 
        //- Read and set the function object if its data have changed
        virtual bool read(const dictionary&);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace functionObjects
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //