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/*
* Copyright (C) 2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <type_traits>
#include <wtf/Ref.h>
#include <wtf/RefCounted.h>
#include <wtf/ThreadSafeRefCounted.h>
#include <wtf/TrailingArray.h>
namespace WTF {
template<typename T, bool isThreadSafe>
class RefCountedFixedVectorBase final : public std::conditional<isThreadSafe, ThreadSafeRefCounted<RefCountedFixedVectorBase<T, isThreadSafe>>, RefCounted<RefCountedFixedVectorBase<T, isThreadSafe>>>::type, public TrailingArray<RefCountedFixedVectorBase<T, isThreadSafe>, T> {
public:
using Base = TrailingArray<RefCountedFixedVectorBase<T, isThreadSafe>, T>;
static Ref<RefCountedFixedVectorBase> create(unsigned size)
{
return adoptRef(*new (NotNull, fastMalloc(Base::allocationSize(size))) RefCountedFixedVectorBase(size));
}
template<typename InputIterator>
static Ref<RefCountedFixedVectorBase> create(InputIterator first, InputIterator last)
{
unsigned size = Checked<uint32_t> { std::distance(first, last) };
return adoptRef(*new (NotNull, fastMalloc(Base::allocationSize(size))) RefCountedFixedVectorBase(size, first, last));
}
template<size_t inlineCapacity, typename OverflowHandler>
static Ref<RefCountedFixedVectorBase> createFromVector(const Vector<T, inlineCapacity, OverflowHandler>& other)
{
unsigned size = Checked<uint32_t> { other.size() }.value();
return adoptRef(*new (NotNull, fastMalloc(Base::allocationSize(size))) RefCountedFixedVectorBase(size, std::begin(other), std::end(other)));
}
template<size_t inlineCapacity, typename OverflowHandler>
static Ref<RefCountedFixedVectorBase> createFromVector(Vector<T, inlineCapacity, OverflowHandler>&& other)
{
Vector<T, inlineCapacity, OverflowHandler> container = WTFMove(other);
unsigned size = Checked<uint32_t> { container.size() }.value();
return adoptRef(*new (NotNull, fastMalloc(Base::allocationSize(size))) RefCountedFixedVectorBase(size, std::move_iterator { container.begin() }, std::move_iterator { container.end() }));
}
Ref<RefCountedFixedVectorBase> clone() const
{
return create(Base::begin(), Base::end());
}
bool operator==(const RefCountedFixedVectorBase& other) const
{
if (Base::size() != other.size())
return false;
for (unsigned i = 0; i < Base::size(); ++i) {
if (Base::at(i) != other.at(i))
return false;
}
return true;
}
private:
explicit RefCountedFixedVectorBase(unsigned size)
: Base(size)
{
}
template<typename InputIterator>
RefCountedFixedVectorBase(unsigned size, InputIterator first, InputIterator last)
: Base(size, first, last)
{
}
};
template<typename T>
using RefCountedFixedVector = RefCountedFixedVectorBase<T, false>;
template<typename T>
using ThreadSafeRefCountedFixedVector = RefCountedFixedVectorBase<T, true>;
} // namespace WTF
using WTF::RefCountedFixedVector;
using WTF::ThreadSafeRefCountedFixedVector;
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