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295f920116
I wrote a script to do this which is attached to the bug. TBR=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/736373003
96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
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/*
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* Copyright (C) 2013 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 COMPUTER, 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 COMPUTER, 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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*/
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#ifndef SKY_ENGINE_PLATFORM_LIFECYCLECONTEXT_H_
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#define SKY_ENGINE_PLATFORM_LIFECYCLECONTEXT_H_
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#include "sky/engine/platform/LifecycleNotifier.h"
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#include "sky/engine/platform/LifecycleObserver.h"
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#include "sky/engine/wtf/HashSet.h"
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#include "sky/engine/wtf/OwnPtr.h"
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#include "sky/engine/wtf/PassOwnPtr.h"
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namespace blink {
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template <typename T>
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class LifecycleContext {
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public:
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typedef LifecycleNotifier<T> Notifier;
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typedef LifecycleObserver<T> Observer;
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LifecycleContext() { }
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virtual ~LifecycleContext() { }
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virtual bool isContextThread() const { return true; }
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// Called from the constructor of observers.
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void wasObservedBy(Observer*);
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// Called from the destructor of observers.
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void wasUnobservedBy(Observer*);
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protected:
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Notifier& lifecycleNotifier();
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private:
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PassOwnPtr<Notifier> createLifecycleNotifier();
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OwnPtr<Notifier> m_lifecycleNotifier;
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};
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template<typename T>
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inline void LifecycleContext<T>::wasObservedBy(typename LifecycleContext<T>::Observer* observer)
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{
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ASSERT(isContextThread());
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lifecycleNotifier().addObserver(observer);
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}
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template<typename T>
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inline void LifecycleContext<T>::wasUnobservedBy(typename LifecycleContext<T>::Observer* observer)
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{
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ASSERT(isContextThread());
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lifecycleNotifier().removeObserver(observer);
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}
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template<typename T>
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inline typename LifecycleContext<T>::Notifier& LifecycleContext<T>::lifecycleNotifier()
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{
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if (!m_lifecycleNotifier)
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m_lifecycleNotifier = static_cast<T*>(this)->createLifecycleNotifier();
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return *m_lifecycleNotifier;
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}
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template<typename T>
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inline PassOwnPtr<typename LifecycleContext<T>::Notifier> LifecycleContext<T>::createLifecycleNotifier()
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{
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return LifecycleContext<T>::Notifier::create(static_cast<T*>(this));
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}
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} // namespace blink
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#endif // SKY_ENGINE_PLATFORM_LIFECYCLECONTEXT_H_
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