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https://github.com/flutter/flutter.git
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76 lines
2.7 KiB
C++
76 lines
2.7 KiB
C++
/*
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* Copyright (C) 2012 Google, Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_PLATFORM_REFCOUNTEDSUPPLEMENT_H_
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#define SKY_ENGINE_PLATFORM_REFCOUNTEDSUPPLEMENT_H_
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#include "sky/engine/platform/Supplementable.h"
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#include "sky/engine/wtf/RefCounted.h"
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#include "sky/engine/wtf/RefPtr.h"
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namespace blink {
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#if !ENABLE(OILPAN)
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template<class T, class S>
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class RefCountedSupplement : public RefCounted<S> {
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public:
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typedef RefCountedSupplement<T, S> ThisType;
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virtual ~RefCountedSupplement() { }
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class Wrapper final : public Supplement<T> {
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public:
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explicit Wrapper(PassRefPtr<ThisType> wrapped) : m_wrapped(wrapped) { }
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virtual ~Wrapper() { }
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#if ENABLE(SECURITY_ASSERT)
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virtual bool isRefCountedWrapper() const override { return true; }
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#endif
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ThisType* wrapped() const { return m_wrapped.get(); }
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private:
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RefPtr<ThisType> m_wrapped;
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};
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static void provideTo(Supplementable<T>& host, const char* key, PassRefPtr<ThisType> supplement)
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{
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host.provideSupplement(key, adoptPtr(new Wrapper(supplement)));
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}
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static ThisType* from(Supplementable<T>& host, const char* key)
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{
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Supplement<T>* found = static_cast<Supplement<T>*>(host.requireSupplement(key));
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if (!found)
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return 0;
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ASSERT_WITH_SECURITY_IMPLICATION(found->isRefCountedWrapper());
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return static_cast<Wrapper*>(found)->wrapped();
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}
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};
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#endif
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} // namespace blink
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#endif // SKY_ENGINE_PLATFORM_REFCOUNTEDSUPPLEMENT_H_
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