- Add History::clear() to empty an existing history (equivalent

to removing all of its resources and all of its processes, but
faster)


git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@887 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/concrete_history.cc

@@ -290,6 +290,17 @@ ConcreteHistory::remove(SubRequest& subrequest)
 }
 
 
+void
+ConcreteHistory::clear()
+{
+  for_each(_snapshots.begin(), _snapshots.end(),
+           deletor<ConcreteEnvironment>());
+  _snapshots.clear();
+  _snapshots.push_back(new ConcreteEnvironment());
+  assert(_snapshots.size() == 1);
+}
+
+
 ConcreteHistory::ResourcePair
 ConcreteHistory::add_resource(const Glib::ustring& name,
                               bool   preemptable,

src/backend/concrete_history.hh

@@ -60,6 +60,7 @@ namespace sgpem
     virtual void  remove(Request&    request);
     virtual void  remove(SubRequest& subrequest);
 
+    virtual void clear();
 
     virtual ResourcePair        add_resource(const Glib::ustring& name,
         bool   preemptable  = false,

src/backend/history.hh

@@ -77,6 +77,8 @@ namespace sgpem
     virtual void  remove(Request&    request)          = 0;
     virtual void  remove(SubRequest& subrequest)       = 0;
 
+    // \brief Clears the whole history
+    virtual void clear() = 0;
 
     virtual ResourcePair add_resource(const Glib::ustring& name,
                                       bool   preemptable  = false,