chromium/v8/src/objects/slots-atomic-inl.h

// Copyright 2018 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_OBJECTS_SLOTS_ATOMIC_INL_H_
#define V8_OBJECTS_SLOTS_ATOMIC_INL_H_

#include "src/base/atomic-utils.h"
#include "src/objects/compressed-slots.h"
#include "src/objects/slots.h"

namespace v8 {
namespace internal {

// This class is intended to be used as a wrapper for elements of an array
// that is passed in to STL functions such as std::sort. It ensures that
// elements accesses are atomic.
// Usage example:
//   FixedArray array;
//   AtomicSlot start(array->GetFirstElementAddress());
//   std::sort(start, start + given_length,
//             [](Tagged_t a, Tagged_t b) {
//               // Decompress a and b if necessary.
//               return my_comparison(a, b);
//             });
// Note how the comparator operates on Tagged_t values, representing the raw
// data found at the given heap location, so you probably want to construct
// an Object from it.
class AtomicSlot : public SlotBase<AtomicSlot, Tagged_t> { … };

}  // namespace internal
}  // namespace v8

#endif  // V8_OBJECTS_SLOTS_ATOMIC_INL_H_