From 1bf1084f2b10c3b47fd1a588d85d21ed0eb41d0c Mon Sep 17 00:00:00 2001
From: Lorry Tar Creator <lorry-tar-importer@lorry>
Date: Tue, 27 Jun 2017 06:07:23 +0000
Subject: webkitgtk-2.16.5

---
 .../WebCore/Modules/webdatabase/SQLTransaction.h   | 132 +++++++++++++--------
 1 file changed, 85 insertions(+), 47 deletions(-)

(limited to 'Source/WebCore/Modules/webdatabase/SQLTransaction.h')

diff --git a/Source/WebCore/Modules/webdatabase/SQLTransaction.h b/Source/WebCore/Modules/webdatabase/SQLTransaction.h
index c24bcc008..81b668f7e 100644
--- a/Source/WebCore/Modules/webdatabase/SQLTransaction.h
+++ b/Source/WebCore/Modules/webdatabase/SQLTransaction.h
@@ -10,7 +10,7 @@
  * 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.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
  *     its contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
@@ -26,87 +26,125 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef SQLTransaction_h
-#define SQLTransaction_h
+#pragma once
 
-#if ENABLE(SQL_DATABASE)
-
-#include "AbstractSQLTransaction.h"
+#include "EventTarget.h"
+#include "ExceptionOr.h"
 #include "SQLCallbackWrapper.h"
-#include "SQLStatement.h"
+#include "SQLTransactionBackend.h"
 #include "SQLTransactionStateMachine.h"
-#include <wtf/PassRefPtr.h>
-#include <wtf/RefPtr.h>
+#include "SQLValue.h"
+#include <wtf/Optional.h>
 
 namespace WebCore {
 
-class AbstractSQLTransactionBackend;
 class Database;
 class SQLError;
 class SQLStatementCallback;
 class SQLStatementErrorCallback;
+class SQLTransactionBackend;
 class SQLTransactionCallback;
 class SQLTransactionErrorCallback;
-class SQLValue;
 class VoidCallback;
 
-class SQLTransaction : public SQLTransactionStateMachine<SQLTransaction>, public AbstractSQLTransaction {
+class SQLTransactionWrapper : public ThreadSafeRefCounted<SQLTransactionWrapper> {
 public:
-    static PassRefPtr<SQLTransaction> create(Database*, PassRefPtr<SQLTransactionCallback>,
-        PassRefPtr<VoidCallback> successCallback, PassRefPtr<SQLTransactionErrorCallback>,
-        bool readOnly);
+    virtual ~SQLTransactionWrapper() { }
+    virtual bool performPreflight(SQLTransaction&) = 0;
+    virtual bool performPostflight(SQLTransaction&) = 0;
+    virtual SQLError* sqlError() const = 0;
+    virtual void handleCommitFailedAfterPostflight(SQLTransaction&) = 0;
+};
+
+class SQLTransaction : public ThreadSafeRefCounted<SQLTransaction>, public SQLTransactionStateMachine<SQLTransaction> {
+public:
+    static Ref<SQLTransaction> create(Ref<Database>&&, RefPtr<SQLTransactionCallback>&&, RefPtr<VoidCallback>&& successCallback, RefPtr<SQLTransactionErrorCallback>&&, RefPtr<SQLTransactionWrapper>&&, bool readOnly);
+    ~SQLTransaction();
+
+    ExceptionOr<void> executeSql(const String& sqlStatement, std::optional<Vector<SQLValue>>&& arguments, RefPtr<SQLStatementCallback>&&, RefPtr<SQLStatementErrorCallback>&&);
 
+    void lockAcquired();
+    void performNextStep();
     void performPendingCallback();
 
-    void executeSQL(const String& sqlStatement, const Vector<SQLValue>& arguments,
-        PassRefPtr<SQLStatementCallback>, PassRefPtr<SQLStatementErrorCallback>, ExceptionCode&);
+    Database& database() { return m_database; }
+    bool isReadOnly() const { return m_readOnly; }
+    void notifyDatabaseThreadIsShuttingDown();
 
-    Database* database() { return m_database.get(); }
+    // APIs called from the backend published via SQLTransaction:
+    void requestTransitToState(SQLTransactionState);
 
 private:
-    SQLTransaction(Database*, PassRefPtr<SQLTransactionCallback>,
-        PassRefPtr<VoidCallback> successCallback, PassRefPtr<SQLTransactionErrorCallback>,
-        bool readOnly);
+    friend class SQLTransactionBackend;
+
+    SQLTransaction(Ref<Database>&&, RefPtr<SQLTransactionCallback>&&, RefPtr<VoidCallback>&& successCallback, RefPtr<SQLTransactionErrorCallback>&&, RefPtr<SQLTransactionWrapper>&&, bool readOnly);
+
+    void enqueueStatement(std::unique_ptr<SQLStatement>);
+
+    void checkAndHandleClosedDatabase();
 
     void clearCallbackWrappers();
 
-    // APIs called from the backend published via AbstractSQLTransaction:
-    virtual void requestTransitToState(SQLTransactionState) override;
-    virtual bool hasCallback() const override;
-    virtual bool hasSuccessCallback() const override;
-    virtual bool hasErrorCallback() const override;
-    virtual void setBackend(AbstractSQLTransactionBackend*) override;
+    void scheduleCallback(void (SQLTransaction::*)());
 
     // State Machine functions:
-    virtual StateFunction stateFunctionFor(SQLTransactionState) override;
-    bool computeNextStateAndCleanupIfNeeded();
+    StateFunction stateFunctionFor(SQLTransactionState) override;
+    void computeNextStateAndCleanupIfNeeded();
 
     // State functions:
-    SQLTransactionState deliverTransactionCallback();
-    SQLTransactionState deliverTransactionErrorCallback();
-    SQLTransactionState deliverStatementCallback();
-    SQLTransactionState deliverQuotaIncreaseCallback();
-    SQLTransactionState deliverSuccessCallback();
-
-    SQLTransactionState unreachableState();
-    SQLTransactionState sendToBackendState();
-
-    SQLTransactionState nextStateForTransactionError();
+    void acquireLock();
+    void openTransactionAndPreflight();
+    void runStatements();
+    void cleanupAndTerminate();
+    void cleanupAfterTransactionErrorCallback();
+    void deliverTransactionCallback();
+    void deliverTransactionErrorCallback();
+    void deliverStatementCallback();
+    void deliverQuotaIncreaseCallback();
+    void deliverSuccessCallback();
+
+    NO_RETURN_DUE_TO_ASSERT void unreachableState();
+
+    void getNextStatement();
+    bool runCurrentStatement();
+    void handleCurrentStatementError();
+    void handleTransactionError();
+    void postflightAndCommit();
+
+    void acquireOriginLock();
+    void releaseOriginLockIfNeeded();
+
+#if !LOG_DISABLED
+    static const char* debugStepName(void (SQLTransaction::*)());
+#endif
 
-    RefPtr<Database> m_database;
-    RefPtr<AbstractSQLTransactionBackend> m_backend;
+    Ref<Database> m_database;
     SQLCallbackWrapper<SQLTransactionCallback> m_callbackWrapper;
     SQLCallbackWrapper<VoidCallback> m_successCallbackWrapper;
     SQLCallbackWrapper<SQLTransactionErrorCallback> m_errorCallbackWrapper;
 
-    bool m_executeSqlAllowed;
+    RefPtr<SQLTransactionWrapper> m_wrapper;
+
+    void (SQLTransaction::*m_nextStep)();
+
+    bool m_executeSqlAllowed { false };
     RefPtr<SQLError> m_transactionError;
 
-    bool m_readOnly;
-};
+    bool m_shouldRetryCurrentStatement { false };
+    bool m_modifiedDatabase { false };
+    bool m_lockAcquired { false };
+    bool m_readOnly { false };
+    bool m_hasVersionMismatch { false };
 
-} // namespace WebCore
+    Lock m_statementMutex;
+    Deque<std::unique_ptr<SQLStatement>> m_statementQueue;
 
-#endif
+    std::unique_ptr<SQLStatement> m_currentStatement;
+
+    std::unique_ptr<SQLiteTransaction> m_sqliteTransaction;
+    RefPtr<OriginLock> m_originLock;
 
-#endif // SQLTransaction_h
+    SQLTransactionBackend m_backend;
+};
+
+} // namespace WebCore
-- 
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