1 files changed, 44 insertions, 0 deletions
diff --git a/deps/v8/src/heap/cppgc/prefinalizer-handler.h b/deps/v8/src/heap/cppgc/prefinalizer-handler.h
new file mode 100644
index 00000000000..a6255534710
--- /dev/null
+++ b/deps/v8/src/heap/cppgc/prefinalizer-handler.h
@@ -0,0 +1,44 @@
+// Copyright 2020 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_HEAP_CPPGC_PREFINALIZER_HANDLER_H_
+#define V8_HEAP_CPPGC_PREFINALIZER_HANDLER_H_
+
+#include <vector>
+
+#include "include/cppgc/prefinalizer.h"
+
+namespace cppgc {
+namespace internal {
+
+class PreFinalizerHandler final {
+ public:
+  using PreFinalizer =
+      cppgc::internal::PreFinalizerRegistrationDispatcher::PreFinalizer;
+
+  PreFinalizerHandler();
+
+  void RegisterPrefinalizer(PreFinalizer prefinalzier);
+
+  void InvokePreFinalizers();
+
+ private:
+  // Checks that the current thread is the thread that created the heap.
+  bool CurrentThreadIsCreationThread();
+
+  // Pre-finalizers are called in the reverse order in which they are
+  // registered by the constructors (including constructors of Mixin
+  // objects) for an object, by processing the ordered_pre_finalizers_
+  // back-to-front.
+  std::vector<PreFinalizer> ordered_pre_finalizers_;
+
+#ifdef DEBUG
+  int creation_thread_id_;
+#endif
+};
+
+}  // namespace internal
+}  // namespace cppgc
+
+#endif  // V8_HEAP_CPPGC_PREFINALIZER_HANDLER_H_