2 files changed, 9 insertions, 0 deletions
diff --git a/include/mbgl/map/backend.hpp b/include/mbgl/map/backend.hpp
index 884c4b5256..69a998709b 100644
--- a/include/mbgl/map/backend.hpp
+++ b/include/mbgl/map/backend.hpp
@@ -3,6 +3,7 @@
 #include <mbgl/map/map_observer.hpp>
 #include <mbgl/util/image.hpp>
 #include <mbgl/util/size.hpp>
+#include <mbgl/util/util.hpp>
 
 #include <memory>
 #include <mutex>
@@ -80,4 +81,8 @@ private:
     friend class BackendScope;
 };
 
+constexpr bool operator==(const Backend& a, const Backend& b) {
+    return &a == &b;
+}
+
 } // namespace mbgl
diff --git a/include/mbgl/map/backend_scope.hpp b/include/mbgl/map/backend_scope.hpp
index 4985cd197f..322c17b3fc 100644
--- a/include/mbgl/map/backend_scope.hpp
+++ b/include/mbgl/map/backend_scope.hpp
@@ -22,10 +22,14 @@ public:
     static bool exists();
 
 private:
+    void activate();
+    void deactivate();
+
     BackendScope* priorScope;
     BackendScope* nextScope;
     Backend& backend;
     const ScopeType scopeType;
+    bool activated = false;
 };
 
 } // namespace mbgl