diff -r 000000000000 -r 4f2f89ce4247 WebKit2/Platform/win/WorkQueueWin.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKit2/Platform/win/WorkQueueWin.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2010 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 "WorkQueue.h"
+
+#include <process.h>
+#include <wtf/Threading.h>
+
+void WorkQueue::registerHandle(HANDLE handle, PassOwnPtr<WorkItem> item)
+{
+    // Add the item.
+    {
+        MutexLocker locker(m_handlesLock);
+        m_handles.set(handle, item.leakPtr());
+    }
+
+    // Set the work event.
+    ::SetEvent(m_performWorkEvent);
+}
+
+void* WorkQueue::workQueueThreadBody(void *context)
+{
+    static_cast<WorkQueue*>(context)->workQueueThreadBody();
+    return 0;
+}
+
+void WorkQueue::workQueueThreadBody()
+{
+    while (true) {
+        Vector<HANDLE> handles;
+        {
+            // Copy the handles to our handles vector.
+            MutexLocker locker(m_handlesLock);
+            copyKeysToVector(m_handles, handles);
+        }
+
+        // Add the "perform work" event handle.
+        handles.append(m_performWorkEvent);
+
+        // Now we wait.
+        DWORD result = ::WaitForMultipleObjects(handles.size(), handles.data(), FALSE, INFINITE);
+
+        if (result == handles.size() - 1)
+            performWork();
+        else {
+            // FIXME: If we ever decide to support unregistering handles we would need to copy the hash map.
+            WorkItem* workItem;
+            HANDLE handle = handles[result];
+
+            {
+                MutexLocker locker(m_handlesLock);
+                workItem = m_handles.get(handle);
+            }
+
+            // Execute the work item.
+            workItem->execute();
+        }
+
+        // Check if this queue is invalid.
+        {
+            MutexLocker locker(m_isValidMutex);
+            if (!m_isValid)
+                break;
+        }
+    }
+}
+
+void WorkQueue::platformInitialize(const char* name)
+{
+    // Create our event.
+    m_performWorkEvent = ::CreateEvent(0, false, false, 0);
+
+    m_workQueueThread = createThread(&WorkQueue::workQueueThreadBody, this, name);
+}
+
+void WorkQueue::platformInvalidate()
+{
+    ::CloseHandle(m_performWorkEvent);
+
+    // FIXME: Stop the thread and do other cleanup.
+}
+
+void WorkQueue::scheduleWork(PassOwnPtr<WorkItem> item)
+{
+    MutexLocker locker(m_workItemQueueLock);
+    m_workItemQueue.append(item.leakPtr());
+
+    // Set the work event.
+    ::SetEvent(m_performWorkEvent);
+}
+
+void WorkQueue::performWork()
+{
+    Vector<WorkItem*> workItemQueue;
+    {
+        MutexLocker locker(m_workItemQueueLock);
+        m_workItemQueue.swap(workItemQueue);
+    }
+
+    for (size_t i = 0; i < workItemQueue.size(); ++i) {
+        OwnPtr<WorkItem> item(workItemQueue[i]);
+
+        MutexLocker locker(m_isValidMutex);
+        if (m_isValid)
+            item->execute();
+    }
+}