STYLE: reset parameters in memInfo::update()

- avoids old values if the read from /proc/.../status somehow failed

applications/test/memInfo/Make/files

@@ -1,3 +1,3 @@
-memInfo.C
+Test-memInfo.C
 
-EXE = $(FOAM_USER_APPBIN)/memInfo
+EXE = $(FOAM_USER_APPBIN)/Test-memInfo

applications/test/memInfo/Test-memInfo.C

@@ -0,0 +1,61 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2010-2010 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 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/>.
+
+Application
+
+Description
+
+\*---------------------------------------------------------------------------*/
+
+#include "memInfo.H"
+#include "IOstreams.H"
+#include "List.H"
+#include "vector.H"
+
+using namespace Foam;
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+//  Main program:
+
+int main(int argc, char *argv[])
+{
+    const int n = 10000000;
+    const char* const memTags = "peak/size/rss mem: ";
+
+    memInfo mem;
+
+    Info<< memTags << mem << endl;
+    List<vector> lst(n, vector::one);
+
+    Info<< "allocate " << n << " vectors" << nl
+        << memTags << mem.update() << endl;
+
+    lst.clear();
+    Info<< "clear" << nl
+        << memTags << mem.update() << endl;
+
+    return 0;
+}
+
+
+// ************************************************************************* //

applications/test/memInfo/memInfo.C

@@ -1,19 +0,0 @@
-#include "memInfo.H"
-#include "IOstreams.H"
-#include "List.H"
-#include "vector.H"
-
-using namespace Foam;
-
-int main()
-{
-    memInfo m;
-
-    Info<< m << endl;
-
-    List<vector> l(10000000, vector::one);
-
-    Info<< m.update() << endl;
-
-    return 0;
-}