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/*
* Copyright (C) 2015-2020 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 "IDBRequest.h"
#include "IDBRequestData.h"
#include "IDBResourceIdentifier.h"
#include "IDBResultData.h"
#include "IDBTransaction.h"
#include <wtf/Function.h>
#include <wtf/MainThread.h>
#include <wtf/Threading.h>
namespace WebCore {
class IDBResultData;
namespace IndexedDB {
enum class IndexRecordType : bool;
}
namespace IDBClient {
class TransactionOperation : public ThreadSafeRefCounted<TransactionOperation> {
WTF_MAKE_ISO_ALLOCATED(TransactionOperation);
friend IDBRequestData::IDBRequestData(TransactionOperation&);
public:
virtual ~TransactionOperation()
{
ASSERT(canCurrentThreadAccessThreadLocalData(originThread()));
}
void perform()
{
ASSERT(canCurrentThreadAccessThreadLocalData(originThread()));
ASSERT(m_performFunction);
m_performFunction();
m_performFunction = { };
}
void transitionToCompleteOnThisThread(const IDBResultData& data)
{
ASSERT(canCurrentThreadAccessThreadLocalData(originThread()));
m_transaction->operationCompletedOnServer(data, *this);
}
void transitionToComplete(const IDBResultData& data, RefPtr<TransactionOperation>&& lastRef)
{
ASSERT(isMainThread());
if (canCurrentThreadAccessThreadLocalData(originThread()))
transitionToCompleteOnThisThread(data);
else {
m_transaction->performCallbackOnOriginThread(*this, &TransactionOperation::transitionToCompleteOnThisThread, data);
m_transaction->callFunctionOnOriginThread([lastRef = WTFMove(lastRef)]() {
});
}
}
void doComplete(const IDBResultData& data)
{
ASSERT(canCurrentThreadAccessThreadLocalData(originThread()));
if (m_performFunction)
m_performFunction = { };
// Due to race conditions between the server sending an "operation complete" message and the client
// forcefully aborting an operation, it's unavoidable that this method might be called twice.
// It's okay to handle that gracefully with an early return.
if (m_didComplete)
return;
m_didComplete = true;
if (m_completeFunction) {
m_completeFunction(data);
// m_completeFunction should not hold ref to this TransactionOperation after its execution.
m_completeFunction = { };
}
m_transaction->operationCompletedOnClient(*this);
}
const IDBResourceIdentifier& identifier() const { return m_identifier; }
Thread& originThread() const { return m_originThread.get(); }
IDBRequest* idbRequest() { return m_idbRequest.get(); }
bool nextRequestCanGoToServer() const { return m_nextRequestCanGoToServer && m_idbRequest; }
void setNextRequestCanGoToServer(bool nextRequestCanGoToServer) { m_nextRequestCanGoToServer = nextRequestCanGoToServer; }
uint64_t operationID() const { return m_operationID; }
protected:
TransactionOperation(IDBTransaction& transaction)
: m_transaction(transaction)
, m_identifier(transaction.connectionProxy())
, m_operationID(transaction.generateOperationID())
{
}
TransactionOperation(IDBTransaction&, IDBRequest&);
Ref<IDBTransaction> m_transaction;
IDBResourceIdentifier m_identifier;
uint64_t m_objectStoreIdentifier { 0 };
uint64_t m_indexIdentifier { 0 };
std::optional<IDBResourceIdentifier> m_cursorIdentifier;
IndexedDB::IndexRecordType m_indexRecordType { IndexedDB::IndexRecordType::Key };
Function<void()> m_performFunction;
Function<void(const IDBResultData&)> m_completeFunction;
private:
IDBResourceIdentifier transactionIdentifier() const { return m_transaction->info().identifier(); }
uint64_t objectStoreIdentifier() const { return m_objectStoreIdentifier; }
uint64_t indexIdentifier() const { return m_indexIdentifier; }
std::optional<IDBResourceIdentifier> cursorIdentifier() const { return m_cursorIdentifier; }
IDBTransaction& transaction() { return m_transaction.get(); }
IndexedDB::IndexRecordType indexRecordType() const { return m_indexRecordType; }
Ref<Thread> m_originThread { Thread::current() };
RefPtr<IDBRequest> m_idbRequest;
bool m_nextRequestCanGoToServer { true };
bool m_didComplete { false };
uint64_t m_operationID { 0 };
};
class TransactionOperationImpl final : public TransactionOperation {
WTF_MAKE_ISO_ALLOCATED(TransactionOperationImpl);
public:
template<typename... Args> static Ref<TransactionOperationImpl> create(Args&&... args) { return adoptRef(*new TransactionOperationImpl(std::forward<Args>(args)...)); }
private:
TransactionOperationImpl(IDBTransaction& transaction, Function<void(const IDBResultData&)> completeMethod, Function<void(TransactionOperation&)> performMethod)
: TransactionOperation(transaction)
{
ASSERT(performMethod);
m_performFunction = [protectedThis = Ref { *this }, performMethod = WTFMove(performMethod)] {
performMethod(protectedThis.get());
};
if (completeMethod) {
m_completeFunction = [protectedThis = Ref { *this }, completeMethod = WTFMove(completeMethod)] (const IDBResultData& resultData) {
completeMethod(resultData);
};
}
}
TransactionOperationImpl(IDBTransaction& transaction, IDBRequest& request, Function<void(const IDBResultData&)> completeMethod, Function<void(TransactionOperation&)> performMethod)
: TransactionOperation(transaction, request)
{
ASSERT(performMethod);
m_performFunction = [protectedThis = Ref { *this }, performMethod = WTFMove(performMethod)] {
performMethod(protectedThis.get());
};
if (completeMethod) {
m_completeFunction = [protectedThis = Ref { *this }, completeMethod = WTFMove(completeMethod)] (const IDBResultData& resultData) {
completeMethod(resultData);
};
}
}
};
} // namespace IDBClient
} // namespace WebCore
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