Finalized Checkpointing, see t-eoCheckpointing for a test

eo/src/utils/eoUpdater.cpp

@@ -0,0 +1,36 @@
+#ifdef _MSC_VER
+#pragma warning(disable:4786)
+#endif
+
+
+#include <strstream>
+
+#include <utils/eoState.h>
+#include <utils/eoUpdater.h>
+
+using namespace std;
+
+void eoTimedStateSaver::operator()(void)
+{
+    time_t now = time(0);
+
+    if (now >= last_time + interval)
+    {
+        last_time = now;
+
+        ostrstream os;
+        os << prefix << (now - first_time) << '.' << extension << ends;
+        state.save(os.str());
+    }
+}
+
+void eoCountedStateSaver::operator()(void)
+{
+    if (++counter % interval == 0)
+    {
+        ostrstream os;
+        os << prefix << counter << '.' << extension << ends;
+        state.save(os.str());
+    }
+};
+