--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/storage/DatabaseTask.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,176 @@
+/*
+ * Copyright (C) 2007, 2008 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.
+ * 3.  Neither the name of Apple Computer, 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE 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 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.
+ */
+#include "config.h"
+#include "DatabaseTask.h"
+
+#if ENABLE(DATABASE)
+
+#include "Database.h"
+#include "Logging.h"
+
+namespace WebCore {
+
+DatabaseTaskSynchronizer::DatabaseTaskSynchronizer()
+    : m_taskCompleted(false)
+{
+}
+
+void DatabaseTaskSynchronizer::waitForTaskCompletion()
+{
+    m_synchronousMutex.lock();
+    if (!m_taskCompleted)
+        m_synchronousCondition.wait(m_synchronousMutex);
+    m_synchronousMutex.unlock();
+}
+
+void DatabaseTaskSynchronizer::taskCompleted()
+{
+    m_synchronousMutex.lock();
+    m_taskCompleted = true;
+    m_synchronousCondition.signal();
+    m_synchronousMutex.unlock();
+}
+
+DatabaseTask::DatabaseTask(Database* database, DatabaseTaskSynchronizer* synchronizer)
+    : m_database(database)
+    , m_synchronizer(synchronizer)
+#ifndef NDEBUG
+    , m_complete(false)
+#endif
+{
+}
+
+DatabaseTask::~DatabaseTask()
+{
+}
+
+void DatabaseTask::performTask()
+{
+    // Database tasks are meant to be used only once, so make sure this one hasn't been performed before.
+    ASSERT(!m_complete);
+
+    LOG(StorageAPI, "Performing %s %p\n", debugTaskName(), this);
+
+    m_database->resetAuthorizer();
+    doPerformTask();
+
+    if (m_synchronizer)
+        m_synchronizer->taskCompleted();
+}
+
+// *** DatabaseOpenTask ***
+// Opens the database file and verifies the version matches the expected version.
+
+Database::DatabaseOpenTask::DatabaseOpenTask(Database* database, bool setVersionInNewDatabase, DatabaseTaskSynchronizer* synchronizer, ExceptionCode& code, bool& success)
+    : DatabaseTask(database, synchronizer)
+    , m_setVersionInNewDatabase(setVersionInNewDatabase)
+    , m_code(code)
+    , m_success(success)
+{
+    ASSERT(synchronizer); // A task with output parameters is supposed to be synchronous.
+}
+
+void Database::DatabaseOpenTask::doPerformTask()
+{
+    m_success = database()->performOpenAndVerify(m_setVersionInNewDatabase, m_code);
+}
+
+#ifndef NDEBUG
+const char* Database::DatabaseOpenTask::debugTaskName() const
+{
+    return "DatabaseOpenTask";
+}
+#endif
+
+// *** DatabaseCloseTask ***
+// Closes the database.
+
+Database::DatabaseCloseTask::DatabaseCloseTask(Database* database, DatabaseTaskSynchronizer* synchronizer)
+    : DatabaseTask(database, synchronizer)
+{
+}
+
+void Database::DatabaseCloseTask::doPerformTask()
+{
+    database()->close();
+}
+
+#ifndef NDEBUG
+const char* Database::DatabaseCloseTask::debugTaskName() const
+{
+    return "DatabaseCloseTask";
+}
+#endif
+
+// *** DatabaseTransactionTask ***
+// Starts a transaction that will report its results via a callback.
+
+Database::DatabaseTransactionTask::DatabaseTransactionTask(PassRefPtr<SQLTransaction> transaction)
+    : DatabaseTask(transaction->database(), 0)
+    , m_transaction(transaction)
+{
+}
+
+void Database::DatabaseTransactionTask::doPerformTask()
+{
+    if (m_transaction->performNextStep())
+        m_transaction->database()->inProgressTransactionCompleted();
+}
+
+#ifndef NDEBUG
+const char* Database::DatabaseTransactionTask::debugTaskName() const
+{
+    return "DatabaseTransactionTask";
+}
+#endif
+
+// *** DatabaseTableNamesTask ***
+// Retrieves a list of all tables in the database - for WebInspector support.
+
+Database::DatabaseTableNamesTask::DatabaseTableNamesTask(Database* database, DatabaseTaskSynchronizer* synchronizer, Vector<String>& names)
+    : DatabaseTask(database, synchronizer)
+    , m_tableNames(names)
+{
+    ASSERT(synchronizer); // A task with output parameters is supposed to be synchronous.
+}
+
+void Database::DatabaseTableNamesTask::doPerformTask()
+{
+    m_tableNames = database()->performGetTableNames();
+}
+
+#ifndef NDEBUG
+const char* Database::DatabaseTableNamesTask::debugTaskName() const
+{
+    return "DatabaseTableNamesTask";
+}
+#endif
+
+} // namespace WebCore
+
+#endif