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// 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_COLLECTION_SUPPORT_HEAP_DEQUE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_COLLECTION_SUPPORT_HEAP_DEQUE_H_
#include "third_party/blink/renderer/platform/heap/heap.h"
#include "third_party/blink/renderer/platform/heap/heap_allocator_impl.h"
#include "third_party/blink/renderer/platform/heap/visitor.h"
#include "third_party/blink/renderer/platform/wtf/deque.h"
#include "third_party/blink/renderer/platform/wtf/type_traits.h"
namespace blink {
template <typename T>
class HeapDeque final : public GarbageCollected<HeapDeque<T>>,
public Deque<T, 0, HeapAllocator> {
DISALLOW_NEW();
public:
HeapDeque() = default;
explicit HeapDeque(wtf_size_t size) : Deque<T, 0, HeapAllocator>(size) {
}
HeapDeque(wtf_size_t size, const T& val)
: Deque<T, 0, HeapAllocator>(size, val) {
}
HeapDeque& operator=(const HeapDeque& other) {
HeapDeque<T> copy(other);
Deque<T, 0, HeapAllocator>::Swap(copy);
return *this;
}
HeapDeque(const HeapDeque<T>& other) : Deque<T, 0, HeapAllocator>(other) {}
void Trace(Visitor* visitor) const {
CheckType();
Deque<T, 0, HeapAllocator>::Trace(visitor);
}
private:
static constexpr void CheckType() {
static_assert(WTF::IsMemberType<T>::value,
"HeapDeque supports only Member.");
static_assert(std::is_trivially_destructible<HeapDeque>::value,
"HeapDeque must be trivially destructible.");
static_assert(WTF::IsTraceable<T>::value,
"For vectors without traceable elements, use Deque<> instead "
"of HeapDeque<>");
}
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_COLLECTION_SUPPORT_HEAP_DEQUE_H_
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