FM / internal

/snap/node/11691/include/node/cppgc/internal/

/snap/node/11691/include/node/cppgc/internal

Name	Size	Mode	Actions
api-constants.h	2901	0644	edit dl rm
atomic-entry-flag.h	1763	0644	edit dl rm
base-page-handle.h	1472	0644	edit dl rm
caged-heap-local-data.h	3696	0644	edit dl rm
caged-heap.h	2264	0644	edit dl rm
compiler-specific.h	1019	0644	edit dl rm
finalizer-trait.h	2656	0644	edit dl rm
gc-info.h	6461	0644	edit dl rm
logging.h	1702	0644	edit dl rm
member-storage.h	8904	0644	edit dl rm
name-trait.h	4180	0644	edit dl rm
persistent-node.h	6032	0644	edit dl rm
pointer-policies.h	8540	0644	edit dl rm
write-barrier.h	19548	0644	edit dl rm

Edit: /snap/node/11691/include/node/cppgc/internal/finalizer-trait.h (2656B)

// 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 INCLUDE_CPPGC_INTERNAL_FINALIZER_TRAIT_H_
#define INCLUDE_CPPGC_INTERNAL_FINALIZER_TRAIT_H_

#include <type_traits>

#include "cppgc/type-traits.h"

namespace cppgc {
namespace internal {

using FinalizationCallback = void (*)(void*);

template <typename T, typename = void>
struct HasFinalizeGarbageCollectedObject : std::false_type {};

template <typename T>
struct HasFinalizeGarbageCollectedObject<
    T,
    std::void_t<decltype(std::declval<T>().FinalizeGarbageCollectedObject())>>
    : std::true_type {};

// The FinalizerTraitImpl specifies how to finalize objects.
template <typename T, bool isFinalized>
struct FinalizerTraitImpl;

template <typename T>
struct FinalizerTraitImpl<T, true> {
 private:
  // Dispatch to custom FinalizeGarbageCollectedObject().
  struct Custom {
    static void Call(void* obj) {
      static_cast<T*>(obj)->FinalizeGarbageCollectedObject();
    }
  };

// Dispatch to regular destructor.
  struct Destructor {
    static void Call(void* obj) { static_cast<T*>(obj)->~T(); }
  };

using FinalizeImpl =
      std::conditional_t<HasFinalizeGarbageCollectedObject<T>::value, Custom,
                         Destructor>;

public:
  static void Finalize(void* obj) {
    static_assert(sizeof(T), "T must be fully defined");
    FinalizeImpl::Call(obj);
  }
};

template <typename T>
struct FinalizerTraitImpl<T, false> {
  static void Finalize(void* obj) {
    static_assert(sizeof(T), "T must be fully defined");
  }
};

// The FinalizerTrait is used to determine if a type requires finalization and
// what finalization means.
template <typename T>
struct FinalizerTrait {
 private:
  // Object has a finalizer if it has
  // - a custom FinalizeGarbageCollectedObject method, or
  // - a destructor.
  static constexpr bool kNonTrivialFinalizer =
      internal::HasFinalizeGarbageCollectedObject<T>::value ||
      !std::is_trivially_destructible<typename std::remove_cv<T>::type>::value;

static void Finalize(void* obj) {
    internal::FinalizerTraitImpl<T, kNonTrivialFinalizer>::Finalize(obj);
  }

public:
  static constexpr bool HasFinalizer() { return kNonTrivialFinalizer; }

// The callback used to finalize an object of type T.
  static constexpr FinalizationCallback kCallback =
      kNonTrivialFinalizer ? Finalize : nullptr;
};

template <typename T>
constexpr FinalizationCallback FinalizerTrait<T>::kCallback;

}  // namespace internal
}  // namespace cppgc

#endif  // INCLUDE_CPPGC_INTERNAL_FINALIZER_TRAIT_H_

// 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 INCLUDE_CPPGC_INTERNAL_FINALIZER_TRAIT_H_ #define INCLUDE_CPPGC_INTERNAL_FINALIZER_TRAIT_H_ #include #include "cppgc/type-traits.h" namespace cppgc { namespace internal { using FinalizationCallback = void (*)(void*); template struct HasFinalizeGarbageCollectedObject : std::false_type {}; template struct HasFinalizeGarbageCollectedObject< T, std::void_t().FinalizeGarbageCollectedObject())>> : std::true_type {}; // The FinalizerTraitImpl specifies how to finalize objects. template struct FinalizerTraitImpl; template struct FinalizerTraitImpl { private: // Dispatch to custom FinalizeGarbageCollectedObject(). struct Custom { static void Call(void* obj) { static_cast(obj)->FinalizeGarbageCollectedObject(); } }; // Dispatch to regular destructor. struct Destructor { static void Call(void* obj) { static_cast(obj)->~T(); } }; using FinalizeImpl = std::conditional_t::value, Custom, Destructor>; public: static void Finalize(void* obj) { static_assert(sizeof(T), "T must be fully defined"); FinalizeImpl::Call(obj); } }; template struct FinalizerTraitImpl { static void Finalize(void* obj) { static_assert(sizeof(T), "T must be fully defined"); } }; // The FinalizerTrait is used to determine if a type requires finalization and // what finalization means. template struct FinalizerTrait { private: // Object has a finalizer if it has // - a custom FinalizeGarbageCollectedObject method, or // - a destructor. static constexpr bool kNonTrivialFinalizer = internal::HasFinalizeGarbageCollectedObject::value || !std::is_trivially_destructible::type>::value; static void Finalize(void* obj) { internal::FinalizerTraitImpl::Finalize(obj); } public: static constexpr bool HasFinalizer() { return kNonTrivialFinalizer; } // The callback used to finalize an object of type T. static constexpr FinalizationCallback kCallback = kNonTrivialFinalizer ? Finalize : nullptr; }; template constexpr FinalizationCallback FinalizerTrait::kCallback; } // namespace internal } // namespace cppgc #endif // INCLUDE_CPPGC_INTERNAL_FINALIZER_TRAIT_H_