88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
/*
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* Copyright (C) 2017 Apple 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. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "CallbackID.h"
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#include <wtf/HashTraits.h>
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#include <wtf/RunLoop.h>
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namespace WebKit {
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class OptionalCallbackID {
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public:
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explicit OptionalCallbackID() { }
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ALWAYS_INLINE explicit OptionalCallbackID(const CallbackID& otherID)
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: m_id(otherID.m_id)
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{
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}
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ALWAYS_INLINE OptionalCallbackID(const OptionalCallbackID& otherID)
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: m_id(otherID.m_id)
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{
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ASSERT(!HashTraits<uint64_t>::isDeletedValue(m_id));
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}
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ALWAYS_INLINE OptionalCallbackID& operator=(const OptionalCallbackID& otherID)
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{
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m_id = otherID.m_id;
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return *this;
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}
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uint64_t toInteger() { return m_id; }
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CallbackID callbackID()
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{
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RELEASE_ASSERT(CallbackID::isValidCallbackID(m_id));
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return CallbackID(m_id);
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}
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operator bool() { return m_id; }
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ALWAYS_INLINE bool isValid() const { return isValidCallbackID(m_id); }
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static ALWAYS_INLINE bool isValidCallbackID(uint64_t rawId)
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{
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return !HashTraits<uint64_t>::isDeletedValue(rawId);
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}
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template<class Encoder> void encode(Encoder& encoder) const
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{
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RELEASE_ASSERT(isValid());
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encoder << m_id;
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}
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template<class Decoder> static WARN_UNUSED_RETURN bool decode(Decoder& decoder, OptionalCallbackID& callbackID)
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{
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auto result = decoder.decode(callbackID.m_id);
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RELEASE_ASSERT(callbackID.isValid());
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return result;
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}
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private:
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uint64_t m_id { HashTraits<uint64_t>::emptyValue() };
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};
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}
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