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src/OpenFOAM/memory/tmp/tmp.H

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+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2011-2012 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::tmp
+
+Description
+    A class for managing temporary objects
+
+SourceFiles
+    tmpI.H
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef tmp_H
+#define tmp_H
+
+#include "refCount.H"
+#include <cstddef>
+
+#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
+#   define ConstructFromTmp
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                             Class tmp Declaration
+\*---------------------------------------------------------------------------*/
+
+template<class T>
+class tmp
+{
+    // Private data
+
+        //- Flag for whether object is a temporary or a constant object
+        bool isTmp_;
+
+        //- Pointer to temporary object
+        mutable T* ptr_;
+
+        //- Const reference to constant object
+        const T& ref_;
+
+
+public:
+
+    // Constructors
+
+        //- Store object pointer
+        inline explicit tmp(T* = 0);
+
+        //- Store object const reference
+        inline tmp(const T&);
+
+        //- Construct copy and increment reference count
+        inline tmp(const tmp<T>&);
+
+        //- Construct copy transferring content of temporary if required
+        inline tmp(const tmp<T>&, bool allowTransfer);
+
+
+    //- Destructor, delete object when reference count == 0
+    inline ~tmp();
+
+
+    // Member Functions
+
+        // Access
+
+            //- Return true if this is really a temporary object
+            inline bool isTmp() const;
+
+            //- Return true if this temporary object empty,
+            //  ie, a temporary without allocation
+            inline bool empty() const;
+
+            //- Is this temporary object valid,
+            //  ie, it is a reference or a temporary that has been allocated
+            inline bool valid() const;
+
+        // Edit
+
+            //- Return tmp pointer for reuse
+            inline T* ptr() const;
+
+            //- If object pointer points to valid object:
+            //  delete object and set pointer to NULL
+            inline void clear() const;
+
+
+    // Member operators
+
+        //- Dereference operator
+        inline T& operator()();
+
+        //- Const dereference operator
+        inline const T& operator()() const;
+
+        //- Const cast to the underlying type reference
+        inline operator const T&() const;
+
+        //- Return object pointer
+        inline T* operator->();
+
+        //- Return const object pointer
+        inline const T* operator->() const;
+
+        //- Assignment operator
+        inline void operator=(const tmp<T>&);
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#include "tmpI.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //