New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/drape_frontend/threads_commutator.cpp

@@ -0,0 +1,26 @@
+#include "drape_frontend/threads_commutator.hpp"
+
+#include "drape_frontend/base_renderer.hpp"
+
+#include "base/assert.hpp"
+
+#include <utility>
+
+namespace df
+{
+
+void ThreadsCommutator::RegisterThread(ThreadName name, BaseRenderer * acceptor)
+{
+  VERIFY(m_acceptors.insert(std::make_pair(name, acceptor)).second, ());
+}
+
+void ThreadsCommutator::PostMessage(ThreadName name, drape_ptr<Message> && message, MessagePriority priority)
+{
+  TAcceptorsMap::iterator it = m_acceptors.find(name);
+  ASSERT(it != m_acceptors.end(), ());
+  if (it != m_acceptors.end() && it->second->CanReceiveMessages())
+    it->second->PostMessage(std::move(message), priority);
+}
+
+} // namespace df
+