1 files changed, 49 insertions, 0 deletions
diff --git a/platform/qt/src/thread_local.cpp b/platform/qt/src/thread_local.cpp
new file mode 100644
index 0000000000..467bfb0d05
--- /dev/null
+++ b/platform/qt/src/thread_local.cpp
@@ -0,0 +1,49 @@
+#include <mbgl/util/thread_local.hpp>
+
+#include <mbgl/actor/scheduler.hpp>
+#include <mbgl/renderer/backend_scope.hpp>
+
+#include <array>
+#include <cassert>
+
+#include <QThreadStorage>
+
+namespace mbgl {
+namespace util {
+
+template <class T>
+class ThreadLocal<T>::Impl {
+public:
+    QThreadStorage<std::array<T*, 1>> local;
+};
+
+template <class T>
+ThreadLocal<T>::ThreadLocal() : impl(std::make_unique<Impl>()) {
+    set(nullptr);
+}
+
+template <class T>
+ThreadLocal<T>::~ThreadLocal() {
+    // ThreadLocal will not take ownership
+    // of the pointer it is managing. The pointer
+    // needs to be explicitly cleared before we
+    // destroy this object.
+    assert(!get());
+}
+
+template <class T>
+T* ThreadLocal<T>::get() {
+    return impl->local.localData()[0];
+}
+
+template <class T>
+void ThreadLocal<T>::set(T* ptr) {
+   impl->local.localData()[0] = ptr;
+}
+
+template class ThreadLocal<Scheduler>;
+template class ThreadLocal<BackendScope>;
+template class ThreadLocal<int>; // For unit tests
+
+} // namespace util
+} // namespace mbgl