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/*
* Copyright (C) 2018 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. AND ITS CONTRIBUTORS ``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 ITS 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 "ProcessIdentifier.h"
#include <wtf/HashTraits.h>
#include <wtf/Hasher.h>
#include <wtf/ObjectIdentifier.h>
namespace WebCore {
enum class WindowIdentifierType { };
using WindowIdentifier = ObjectIdentifier<WindowIdentifierType>;
// Window identifier that is unique across all WebContent processes.
struct GlobalWindowIdentifier {
ProcessIdentifier processIdentifier;
WindowIdentifier windowIdentifier;
friend bool operator==(const GlobalWindowIdentifier&, const GlobalWindowIdentifier&) = default;
};
inline void add(Hasher& hasher, const GlobalWindowIdentifier& identifier)
{
add(hasher, identifier.processIdentifier, identifier.windowIdentifier);
}
} // namespace WebCore
namespace WTF {
struct GlobalWindowIdentifierHash {
static unsigned hash(const WebCore::GlobalWindowIdentifier& key) { return computeHash(key); }
static bool equal(const WebCore::GlobalWindowIdentifier& a, const WebCore::GlobalWindowIdentifier& b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = true;
};
template<> struct HashTraits<WebCore::GlobalWindowIdentifier> : GenericHashTraits<WebCore::GlobalWindowIdentifier> {
static WebCore::GlobalWindowIdentifier emptyValue() { return { HashTraits<WebCore::ProcessIdentifier>::emptyValue(), HashTraits<WebCore::WindowIdentifier>::emptyValue() }; }
static bool isEmptyValue(const WebCore::GlobalWindowIdentifier& value) { return value.windowIdentifier.isHashTableEmptyValue(); }
static void constructDeletedValue(WebCore::GlobalWindowIdentifier& slot)
{
new (NotNull, &slot.processIdentifier) WebCore::ProcessIdentifier(WTF::HashTableDeletedValue);
new (NotNull, &slot.windowIdentifier) WebCore::WindowIdentifier(WTF::HashTableDeletedValue);
}
static bool isDeletedValue(const WebCore::GlobalWindowIdentifier& slot) { return slot.windowIdentifier.isHashTableDeletedValue(); }
};
template<> struct DefaultHash<WebCore::GlobalWindowIdentifier> : GlobalWindowIdentifierHash { };
} // namespace WTF
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