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/*
* Copyright (C) 2020 Metrological Group B.V.
* Copyright (C) 2020 Igalia S.L.
*
* 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 <memory>
#include <wtf/Box.h>
namespace WTF {
template<typename T> struct BoxPtrDeleter {
void operator()(T*) const = delete;
};
#define WTF_DEFINE_BOXPTR_DELETER(typeName, deleterFunction) \
template<> struct BoxPtrDeleter<typeName> \
{ \
void operator() (typeName* ptr) const \
{ \
deleterFunction(ptr); \
} \
};
template<typename T> using BoxPtr = Box<std::unique_ptr<T, BoxPtrDeleter<T>>>;
template<typename T> BoxPtr<T> adoptInBoxPtr(T* ptr)
{
return BoxPtr<T>::create(ptr);
}
template<typename T> bool operator==(const BoxPtr<T>& lhs, const BoxPtr<T>& rhs)
{
if (!lhs && !rhs)
return true;
if (!lhs || !rhs)
return false;
if (!lhs->get() && !rhs->get())
return true;
if (!lhs->get() || !rhs->get())
return false;
return *lhs == *rhs;
}
} // namespace WTF
using WTF::adoptInBoxPtr;
using WTF::BoxPtr;
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