Move core/platform/sql into modules/webdatabase

Source/core/platform/sql/SQLiteTransaction.cpp

-/*
- * Copyright (C) 2006 Apple Computer, 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
- * 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.
- */
-
-#include "config.h"
-#include "core/platform/sql/SQLiteTransaction.h"
-
-#include "core/platform/sql/SQLiteDatabase.h"
-
-namespace WebCore {
-
-SQLiteTransaction::SQLiteTransaction(SQLiteDatabase& db, bool readOnly)
-    : m_db(db)
-    , m_inProgress(false)
-    , m_readOnly(readOnly)
-{
-}
-
-SQLiteTransaction::~SQLiteTransaction()
-{
-    if (m_inProgress)
-        rollback();
-}
-
-void SQLiteTransaction::begin()
-{
-    if (!m_inProgress) {
-        ASSERT(!m_db.m_transactionInProgress);
-        // Call BEGIN IMMEDIATE for a write transaction to acquire
-        // a RESERVED lock on the DB file. Otherwise, another write
-        // transaction (on another connection) could make changes
-        // to the same DB file before this transaction gets to execute
-        // any statements. If that happens, this transaction will fail.
-        // http://www.sqlite.org/lang_transaction.html
-        // http://www.sqlite.org/lockingv3.html#locking
-        if (m_readOnly)
-            m_inProgress = m_db.executeCommand("BEGIN");
-        else
-            m_inProgress = m_db.executeCommand("BEGIN IMMEDIATE");
-        m_db.m_transactionInProgress = m_inProgress;
-    }
-}
-
-void SQLiteTransaction::commit()
-{
-    if (m_inProgress) {
-        ASSERT(m_db.m_transactionInProgress);
-        m_inProgress = !m_db.executeCommand("COMMIT");
-        m_db.m_transactionInProgress = m_inProgress;
-    }
-}
-
-void SQLiteTransaction::rollback()
-{
-    // We do not use the 'm_inProgress = m_db.executeCommand("ROLLBACK")' construct here,
-    // because m_inProgress should always be set to false after a ROLLBACK, and
-    // m_db.executeCommand("ROLLBACK") can sometimes harmlessly fail, thus returning
-    // a non-zero/true result (http://www.sqlite.org/lang_transaction.html).
-    if (m_inProgress) {
-        ASSERT(m_db.m_transactionInProgress);
-        m_db.executeCommand("ROLLBACK");
-        m_inProgress = false;
-        m_db.m_transactionInProgress = false;
-    }
-}
-
-void SQLiteTransaction::stop()
-{
-    if (m_inProgress) {
-        m_inProgress = false;
-        m_db.m_transactionInProgress = false;
-    }
-}
-
-bool SQLiteTransaction::wasRolledBackBySqlite() const
-{
-    // According to http://www.sqlite.org/c3ref/get_autocommit.html,
-    // the auto-commit flag should be off in the middle of a transaction
-    return m_inProgress && m_db.isAutoCommitOn();
-}
-
-} // namespace WebCore