diff --git a/src/state.cpp b/src/state.cpp
new file mode 100644
index 00000000..d4040f4b
--- /dev/null
+++ b/src/state.cpp
@@ -0,0 +1,3 @@
+#include "state.hpp"
+
+State state;
diff --git a/src/state.hpp b/src/state.hpp
new file mode 100644
index 00000000..749e6d74
--- /dev/null
+++ b/src/state.hpp
@@ -0,0 +1,14 @@
+#pragma once
+
+#include "boost/unordered/concurrent_flat_map.hpp"
+
+#include <filesystem>
+
+
+class State
+{
+public:
+  boost::concurrent_flat_map<std::filesystem::path,int> passthrough;
+};
+
+extern State state;