First level of support for cached temporary fields.

applications/test/fieldDependency/Make/files

+fieldDependency.C
+
+EXE = $(FOAM_USER_APPBIN)/fieldDependency

applications/test/fieldDependency/Make/options

+EXE_INC = \
+    -I$(LIB_SRC)/finiteVolume/lnInclude
+
+EXE_LIBS = \
+    -lfiniteVolume

applications/test/fieldDependency/fieldDependency.C

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
+     \\/     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 2 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, write to the Free Software Foundation,
+    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+Description
+    Test field dependencies.
+
+\*---------------------------------------------------------------------------*/
+
+#include "argList.H"
+#include "Time.H"
+#include "volFields.H"
+
+using namespace Foam;
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+// Main program:
+
+int main(int argc, char *argv[])
+{
+    #include "setRootCase.H"
+    #include "createTime.H"
+    #include "createMesh.H"
+
+    Info<< "Creating field T\n" << endl;
+    volScalarField T
+    (
+        IOobject
+        (
+            "T",
+            runTime.timeName(),
+            mesh,
+            IOobject::NO_READ,
+            IOobject::AUTO_WRITE
+        ),
+        mesh,
+        dimensionedScalar("zero", dimless, 0)
+    );
+
+    Info<< "Creating field p\n" << endl;
+    volScalarField p
+    (
+        IOobject
+        (
+            "p",
+            runTime.timeName(),
+            mesh,
+            IOobject::NO_READ,
+            IOobject::AUTO_WRITE
+        ),
+        mesh,
+        dimensionedScalar("zero", dimless, 0)
+    );
+
+
+    Info<< "p.eventNo:" << p.eventNo() << endl;
+    Info<< "p.uptodate:" << p.upToDate("T")<< endl;
+
+    // Change T and mark as uptodate.
+    Info<< "Changing T" << endl;
+    T = 0.0;
+    T.setUpToDate();
+    Info<< "T.eventNo:" << T.eventNo() << endl;
+
+    // Check p dependency:
+    Info<< "p.uptodate:" << p.upToDate("T")<< endl;
+
+    // Change p and mark as uptodate.
+    Info<< "Changing p." << endl;
+    p.setUpToDate();
+    Info<< "p.uptodate:" << p.upToDate("T")<< endl;
+    Info<< "p.eventNo:" << p.eventNo() << endl;
+
+
+    Info<< "End\n" << endl;
+
+    return 0;
+}
+
+
+// ************************************************************************* //

src/OpenFOAM/matrices/solution/solution.C

@@ -59,11 +59,8 @@ Foam::solution::solution(const objectRegistry& obr, const fileName& dictName)
             IOobject::NO_WRITE
         )
     ),
-    relaxationFactors_
-    (
-        ITstream("relaxationFactors",
-        tokenList())()
-    ),
+    cache_(ITstream("cache", tokenList())()),
+    relaxationFactors_(ITstream("relaxationFactors", tokenList())()),
     defaultRelaxationFactor_(0),
     solvers_(ITstream("solvers", tokenList())())
 {
@@ -151,44 +148,14 @@ Foam::label Foam::solution::upgradeSolverDict
 }
 
 
-bool Foam::solution::read()
+bool Foam::solution::cache(const word& name) const
 {
-    if (regIOobject::read())
-    {
-        const dictionary& dict = solutionDict();
-
-        if (dict.found("relaxationFactors"))
-        {
-            relaxationFactors_ = dict.subDict("relaxationFactors");
-        }
-
-        relaxationFactors_.readIfPresent("default", defaultRelaxationFactor_);
-
-        if (dict.found("solvers"))
-        {
-            solvers_ = dict.subDict("solvers");
-            upgradeSolverDict(solvers_);
-        }
-
-        return true;
-    }
-    else
+    if (debug)
     {
-        return false;
+        Info<< "Find cache entry for " << name << endl;
     }
-}
 
-
-const Foam::dictionary& Foam::solution::solutionDict() const
-{
-    if (found("select"))
-    {
-        return subDict(word(lookup("select")));
-    }
-    else
-    {
-        return *this;
-    }
+    return cache_.found(name);
 }
 
 
@@ -235,6 +202,19 @@ Foam::scalar Foam::solution::relaxationFactor(const word& name) const
 }
 
 
+const Foam::dictionary& Foam::solution::solutionDict() const
+{
+    if (found("select"))
+    {
+        return subDict(word(lookup("select")));
+    }
+    else
+    {
+        return *this;
+    }
+}
+
+
 const Foam::dictionary& Foam::solution::solverDict(const word& name) const
 {
     if (debug)
@@ -259,4 +239,37 @@ const Foam::dictionary& Foam::solution::solver(const word& name) const
 }
 
 
+bool Foam::solution::read()
+{
+    if (regIOobject::read())
+    {
+        const dictionary& dict = solutionDict();
+
+        if (dict.found("cache"))
+        {
+            cache_ = dict.subDict("cache");
+        }
+
+        if (dict.found("relaxationFactors"))
+        {
+            relaxationFactors_ = dict.subDict("relaxationFactors");
+        }
+
+        relaxationFactors_.readIfPresent("default", defaultRelaxationFactor_);
+
+        if (dict.found("solvers"))
+        {
+            solvers_ = dict.subDict("solvers");
+            upgradeSolverDict(solvers_);
+        }
+
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+
+
 // ************************************************************************* //

src/OpenFOAM/matrices/solution/solution.H

@@ -53,6 +53,9 @@ class solution
 {
     // Private data
 
+        //- Dictionary of temporary fields to cache
+        dictionary cache_;
+
         //- Dictionary of relaxation factors for all the fields
         dictionary relaxationFactors_;
 
@@ -62,6 +65,7 @@ class solution
         //- Dictionary of solver parameters for all the fields
         dictionary solvers_;
 
+
     // Private Member Functions
 
         //- Disallow default bitwise copy construct and assignment
@@ -90,9 +94,8 @@ public:
 
         // Access
 
-            //- Return the selected sub-dictionary of solvers if the "select"
-            //  keyword is given, otherwise return the complete dictionary
-            const dictionary& solutionDict() const;
+            //- Return true if the given field should be cached
+            bool cache(const word& name) const;
 
             //- Return true if the relaxation factor is given for the field
             bool relax(const word& name) const;
@@ -100,6 +103,10 @@ public:
             //- Return the relaxation factor for the given field
             scalar relaxationFactor(const word& name) const;
 
+            //- Return the selected sub-dictionary of solvers if the "select"
+            //  keyword is given, otherwise return the complete dictionary
+            const dictionary& solutionDict() const;
+
             //- Return the solver controls dictionary for the given field
             const dictionary& solverDict(const word& name) const;