Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 114 insertions, 0 deletions

diff --git a/Source/WebCore/storage/IDBTransactionCoordinator.cpp b/Source/WebCore/storage/IDBTransactionCoordinator.cpp
new file mode 100644
index 0000000..f867f42
--- /dev/null
+++ b/Source/WebCore/storage/IDBTransactionCoordinator.cpp
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2010 Google 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 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 "IDBTransactionCoordinator.h"
+
+#if ENABLE(INDEXED_DATABASE)
+
+#include "IDBDatabaseBackendImpl.h"
+#include "IDBObjectStoreBackendInterface.h"
+#include "IDBTransactionBackendImpl.h"
+#include "SQLiteDatabase.h"
+#include "ScriptExecutionContext.h"
+
+namespace WebCore {
+
+PassRefPtr<IDBTransactionCoordinator> IDBTransactionCoordinator::create()
+{
+    return adoptRef(new IDBTransactionCoordinator());
+}
+
+IDBTransactionCoordinator::IDBTransactionCoordinator() 
+{
+}
+
+IDBTransactionCoordinator::~IDBTransactionCoordinator()
+{
+}
+
+void IDBTransactionCoordinator::didCreateTransaction(IDBTransactionBackendImpl* transaction)
+{
+    ASSERT(!m_transactions.contains(transaction));
+    m_transactions.add(transaction, transaction);
+}
+
+void IDBTransactionCoordinator::didStartTransaction(IDBTransactionBackendImpl* transaction)
+{
+    ASSERT(m_transactions.contains(transaction));
+
+    m_startedTransactions.add(transaction);
+    processStartedTransactions();
+}
+
+void IDBTransactionCoordinator::didFinishTransaction(IDBTransactionBackendImpl* transaction)
+{
+    ASSERT(m_transactions.contains(transaction));
+
+    if (m_startedTransactions.contains(transaction)) {
+        ASSERT(!m_runningTransactions.contains(transaction));
+        m_startedTransactions.remove(transaction);
+    } else if (m_runningTransactions.contains(transaction))
+        m_runningTransactions.remove(transaction);
+
+    m_transactions.remove(transaction);
+
+    processStartedTransactions();
+}
+
+#ifndef NDEBUG
+// Verifies internal consistiency while returning whether anything is found.
+bool IDBTransactionCoordinator::isActive(IDBTransactionBackendImpl* transaction)
+{
+    bool found = false;
+    if (m_startedTransactions.contains(transaction))
+        found = true;
+    if (m_runningTransactions.contains(transaction)) {
+        ASSERT(!found);
+        found = true;
+    }
+    ASSERT(found == m_transactions.contains(transaction));
+    return found;
+}
+#endif
+
+void IDBTransactionCoordinator::processStartedTransactions()
+{
+    // FIXME: For now, we only allow one transaction to run at a time.
+    if (!m_runningTransactions.isEmpty())
+        return;
+
+    if (m_startedTransactions.isEmpty())
+        return;
+
+    IDBTransactionBackendImpl* transaction = *m_startedTransactions.begin();
+    m_startedTransactions.remove(transaction);
+    m_runningTransactions.add(transaction);
+    transaction->run();
+}
+
+};
+
+#endif // ENABLE(INDEXED_DATABASE)