text: // Copyright 2021 The Chromium 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_V8_WRAPPER_CUSTOM_SPACES_H_
  #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_V8_WRAPPER_CUSTOM_SPACES_H_
  
  #include "third_party/blink/renderer/platform/platform_export.h"
  #include "v8/include/cppgc/custom-space.h"
  
  namespace blink {
  
  // The following defines custom spaces that are used to partition Oilpan's heap.
  // Each custom space is assigned to a type partition using `cppgc::SpaceTrait`.
  // It is expected that `kSpaceIndex` uniquely identifies a space and that the
  // indices of all custom spaces form a sequence starting at 0. See
  // `cppgc::CustomSpace` for details.
  
  class PLATFORM_EXPORT HeapVectorBackingSpace
      : public cppgc::CustomSpace<HeapVectorBackingSpace> {
   public:
    static constexpr cppgc::CustomSpaceIndex kSpaceIndex = 0;
    static constexpr bool kSupportsCompaction = true;
  };
  
  class PLATFORM_EXPORT HeapHashTableBackingSpace
      : public cppgc::CustomSpace<HeapHashTableBackingSpace> {
   public:
    static constexpr cppgc::CustomSpaceIndex kSpaceIndex = 1;
    static constexpr bool kSupportsCompaction = true;
  };
  
  class PLATFORM_EXPORT NodeSpace : public cppgc::CustomSpace<NodeSpace> {
   public:
    static constexpr cppgc::CustomSpaceIndex kSpaceIndex = 2;
  };
  
  class PLATFORM_EXPORT CSSValueSpace : public cppgc::CustomSpace<CSSValueSpace> {
   public:
    static constexpr cppgc::CustomSpaceIndex kSpaceIndex = 3;
  };
  
  }  // namespace blink
  
  #endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_V8_WRAPPER_CUSTOM_SPACES_H_
  