1 files changed, 53 insertions, 0 deletions
diff --git a/chromium/v8/src/heap/cppgc/caged-heap.h b/chromium/v8/src/heap/cppgc/caged-heap.h
new file mode 100644
index 00000000000..7ac34624a0a
--- /dev/null
+++ b/chromium/v8/src/heap/cppgc/caged-heap.h
@@ -0,0 +1,53 @@
+// 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_CAGED_HEAP_H_
+#define V8_HEAP_CPPGC_CAGED_HEAP_H_
+
+#include <memory>
+
+#include "include/cppgc/platform.h"
+#include "src/base/bounded-page-allocator.h"
+#include "src/heap/cppgc/globals.h"
+#include "src/heap/cppgc/virtual-memory.h"
+
+namespace cppgc {
+namespace internal {
+
+struct CagedHeapLocalData;
+class HeapBase;
+
+class CagedHeap final {
+ public:
+  using AllocatorType = v8::base::BoundedPageAllocator;
+
+  CagedHeap(HeapBase* heap, PageAllocator* platform_allocator);
+
+  CagedHeap(const CagedHeap&) = delete;
+  CagedHeap& operator=(const CagedHeap&) = delete;
+
+  AllocatorType& allocator() { return *bounded_allocator_; }
+  const AllocatorType& allocator() const { return *bounded_allocator_; }
+
+  CagedHeapLocalData& local_data() {
+    return *static_cast<CagedHeapLocalData*>(reserved_area_.address());
+  }
+  const CagedHeapLocalData& local_data() const {
+    return *static_cast<CagedHeapLocalData*>(reserved_area_.address());
+  }
+
+  static uintptr_t OffsetFromAddress(void* address) {
+    return reinterpret_cast<uintptr_t>(address) &
+           (kCagedHeapReservationAlignment - 1);
+  }
+
+ private:
+  VirtualMemory reserved_area_;
+  std::unique_ptr<AllocatorType> bounded_allocator_;
+};
+
+}  // namespace internal
+}  // namespace cppgc
+
+#endif  // V8_HEAP_CPPGC_CAGED_HEAP_H_