New cpp folder structure

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

libs/routing/routes_builder/data_source_storage.cpp

@@ -0,0 +1,26 @@
+#include "routing/routes_builder/data_source_storage.hpp"
+
+#include "base/assert.hpp"
+
+#include <utility>
+
+namespace routing
+{
+namespace routes_builder
+{
+void DataSourceStorage::PushDataSource(std::unique_ptr<FrozenDataSource> && ptr)
+{
+  std::lock_guard<std::mutex> lock(m_mutex);
+  m_freeDataSources.emplace_back(std::move(ptr));
+}
+
+std::unique_ptr<FrozenDataSource> DataSourceStorage::GetDataSource()
+{
+  std::lock_guard<std::mutex> lock(m_mutex);
+  CHECK(!m_freeDataSources.empty(), ());
+  std::unique_ptr<FrozenDataSource> front = std::move(m_freeDataSources.front());
+  m_freeDataSources.pop_front();
+  return front;
+}
+}  // namespace routes_builder
+}  // namespace routing