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/*
* Copyright (C) 2015, 2016 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 <WebCore/ProcessIdentifier.h>
#include <wtf/ArgumentCoder.h>
#include <wtf/Hasher.h>
namespace WebCore {
class IDBRequest;
namespace IDBClient {
class IDBConnectionProxy;
}
namespace IDBServer {
class IDBConnectionToClient;
}
using IDBConnectionIdentifier = ProcessIdentifier;
struct IDBResourceIdentifierHashTraits;
enum class IDBResourceObjectIdentifierType { };
using IDBResourceObjectIdentifier = AtomicObjectIdentifier<IDBResourceObjectIdentifierType>;
class IDBResourceIdentifier {
public:
explicit IDBResourceIdentifier(const IDBClient::IDBConnectionProxy&);
IDBResourceIdentifier(const IDBClient::IDBConnectionProxy&, const IDBRequest&);
explicit IDBResourceIdentifier(const IDBServer::IDBConnectionToClient&);
bool isEmpty() const
{
return !m_resourceNumber && !m_idbConnectionIdentifier;
}
friend bool operator==(const IDBResourceIdentifier&, const IDBResourceIdentifier&) = default;
std::optional<IDBConnectionIdentifier> connectionIdentifier() const { return m_idbConnectionIdentifier; }
WEBCORE_EXPORT IDBResourceIdentifier isolatedCopy() const;
String loggingString() const;
WEBCORE_EXPORT IDBResourceIdentifier();
private:
friend struct IPC::ArgumentCoder<IDBResourceIdentifier, void>;
friend struct IDBResourceIdentifierHashTraits;
friend void add(Hasher&, const IDBResourceIdentifier&);
WEBCORE_EXPORT IDBResourceIdentifier(std::optional<IDBConnectionIdentifier>, std::optional<IDBResourceObjectIdentifier>);
Markable<IDBConnectionIdentifier> m_idbConnectionIdentifier;
Markable<IDBResourceObjectIdentifier> m_resourceNumber;
};
inline void add(Hasher& hasher, const IDBResourceIdentifier& identifier)
{
add(hasher, identifier.m_idbConnectionIdentifier, identifier.m_resourceNumber);
}
struct IDBResourceIdentifierHash {
static unsigned hash(const IDBResourceIdentifier& a) { return computeHash(a); }
static bool equal(const IDBResourceIdentifier& a, const IDBResourceIdentifier& b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = false;
};
struct IDBResourceIdentifierHashTraits : WTF::CustomHashTraits<IDBResourceIdentifier> {
static constexpr bool hasIsEmptyValueFunction = true;
static constexpr bool emptyValueIsZero = false;
static constexpr uint64_t resourceNumberDeletedValue = -1;
static IDBResourceIdentifier emptyValue()
{
return { };
}
static bool isEmptyValue(const IDBResourceIdentifier& identifier)
{
return identifier.isEmpty();
}
static void constructDeletedValue(IDBResourceIdentifier& identifier)
{
new (NotNull, &identifier.m_resourceNumber) IDBResourceObjectIdentifier(WTF::HashTableDeletedValue);
}
static bool isDeletedValue(const IDBResourceIdentifier& identifier)
{
return identifier.m_resourceNumber && identifier.m_resourceNumber->isHashTableDeletedValue();
}
};
} // namespace WebCore
namespace WTF {
template<> struct HashTraits<WebCore::IDBResourceIdentifier> : WebCore::IDBResourceIdentifierHashTraits { };
template<> struct DefaultHash<WebCore::IDBResourceIdentifier> : WebCore::IDBResourceIdentifierHash { };
inline WebCore::IDBConnectionIdentifier crossThreadCopy(WebCore::IDBConnectionIdentifier identifier)
{
return identifier;
}
} // namespace WTF
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