webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 108 insertions, 0 deletions

diff --git a/Source/WebCore/Modules/indexeddb/shared/IDBResourceIdentifier.cpp b/Source/WebCore/Modules/indexeddb/shared/IDBResourceIdentifier.cpp
new file mode 100644
index 000000000..d7e3f1742
--- /dev/null
+++ b/Source/WebCore/Modules/indexeddb/shared/IDBResourceIdentifier.cpp
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+#include "config.h"
+#include "IDBResourceIdentifier.h"
+
+#if ENABLE(INDEXED_DATABASE)
+
+#include "IDBConnectionToClient.h"
+#include "IDBConnectionToServer.h"
+#include "IDBRequest.h"
+#include <wtf/MainThread.h>
+
+namespace WebCore {
+
+static uint64_t nextClientResourceNumber()
+{
+    static std::atomic<uint64_t> currentNumber(1);
+    return currentNumber += 2;
+}
+
+static uint64_t nextServerResourceNumber()
+{
+    ASSERT(isMainThread());
+    static uint64_t currentNumber = 0;
+    return currentNumber += 2;
+}
+
+IDBResourceIdentifier::IDBResourceIdentifier()
+{
+}
+
+IDBResourceIdentifier::IDBResourceIdentifier(uint64_t connectionIdentifier, uint64_t resourceIdentifier)
+    : m_idbConnectionIdentifier(connectionIdentifier)
+    , m_resourceNumber(resourceIdentifier)
+{
+}
+
+IDBResourceIdentifier::IDBResourceIdentifier(const IDBClient::IDBConnectionProxy& connectionProxy)
+    : m_idbConnectionIdentifier(connectionProxy.serverConnectionIdentifier())
+    , m_resourceNumber(nextClientResourceNumber())
+{
+}
+
+IDBResourceIdentifier::IDBResourceIdentifier(const IDBClient::IDBConnectionProxy& connectionProxy, const IDBRequest& request)
+    : m_idbConnectionIdentifier(connectionProxy.serverConnectionIdentifier())
+    , m_resourceNumber(request.resourceIdentifier().m_resourceNumber)
+{
+}
+
+IDBResourceIdentifier::IDBResourceIdentifier(const IDBServer::IDBConnectionToClient& connection)
+    : m_idbConnectionIdentifier(connection.identifier())
+    , m_resourceNumber(nextServerResourceNumber())
+{
+}
+
+IDBResourceIdentifier IDBResourceIdentifier::isolatedCopy() const
+{
+    return IDBResourceIdentifier(m_idbConnectionIdentifier, m_resourceNumber);
+}
+
+IDBResourceIdentifier IDBResourceIdentifier::emptyValue()
+{
+    return IDBResourceIdentifier(0, 0);
+}
+
+IDBResourceIdentifier IDBResourceIdentifier::deletedValue()
+{
+    return IDBResourceIdentifier(std::numeric_limits<uint64_t>::max(), std::numeric_limits<uint64_t>::max());
+}
+
+bool IDBResourceIdentifier::isHashTableDeletedValue() const
+{
+    return m_idbConnectionIdentifier == std::numeric_limits<uint64_t>::max()
+        && m_resourceNumber == std::numeric_limits<uint64_t>::max();
+}
+
+#if !LOG_DISABLED
+String IDBResourceIdentifier::loggingString() const
+{
+    return String::format("<%" PRIu64", %" PRIu64">", m_idbConnectionIdentifier, m_resourceNumber);
+}
+#endif
+} // namespace WebCore
+
+#endif // ENABLE(INDEXED_DATABASE)