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v8/include/cppgc/heap-handle.h

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+// Copyright 2022 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 INCLUDE_CPPGC_HEAP_HANDLE_H_
+#define INCLUDE_CPPGC_HEAP_HANDLE_H_
+
+#include "v8config.h"  // NOLINT(build/include_directory)
+
+namespace cppgc {
+
+namespace internal {
+class HeapBase;
+class WriteBarrierTypeForCagedHeapPolicy;
+class WriteBarrierTypeForNonCagedHeapPolicy;
+}  // namespace internal
+
+/**
+ * Opaque handle used for additional heap APIs.
+ */
+class HeapHandle {
+ private:
+  HeapHandle() = default;
+
+  V8_INLINE bool is_incremental_marking_in_progress() const {
+    return is_incremental_marking_in_progress_;
+  }
+
+  V8_INLINE bool is_young_generation_enabled() const {
+    return is_young_generation_enabled_;
+  }
+
+  bool is_incremental_marking_in_progress_ = false;
+  bool is_young_generation_enabled_ = false;
+
+  friend class internal::HeapBase;
+  friend class internal::WriteBarrierTypeForCagedHeapPolicy;
+  friend class internal::WriteBarrierTypeForNonCagedHeapPolicy;
+};
+
+}  // namespace cppgc
+
+#endif  // INCLUDE_CPPGC_HEAP_HANDLE_H_