--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/websockets/WorkerThreadableWebSocketChannel.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,426 @@
+/*
+ * Copyright (C) 2009, 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER 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"
+
+#if ENABLE(WEB_SOCKETS) && ENABLE(WORKERS)
+
+#include "WorkerThreadableWebSocketChannel.h"
+
+#include "CrossThreadTask.h"
+#include "PlatformString.h"
+#include "ScriptExecutionContext.h"
+#include "ThreadableWebSocketChannelClientWrapper.h"
+#include "WebSocketChannel.h"
+#include "WebSocketChannelClient.h"
+#include "WorkerContext.h"
+#include "WorkerLoaderProxy.h"
+#include "WorkerRunLoop.h"
+#include "WorkerThread.h"
+
+#include <wtf/PassRefPtr.h>
+
+namespace WebCore {
+
+WorkerThreadableWebSocketChannel::WorkerThreadableWebSocketChannel(WorkerContext* context, WebSocketChannelClient* client, const String& taskMode, const KURL& url, const String& protocol)
+    : m_workerContext(context)
+    , m_workerClientWrapper(ThreadableWebSocketChannelClientWrapper::create(client))
+    , m_bridge(Bridge::create(m_workerClientWrapper, m_workerContext, taskMode, url, protocol))
+{
+}
+
+WorkerThreadableWebSocketChannel::~WorkerThreadableWebSocketChannel()
+{
+    if (m_bridge)
+        m_bridge->disconnect();
+}
+
+void WorkerThreadableWebSocketChannel::connect()
+{
+    if (m_bridge)
+        m_bridge->connect();
+}
+
+bool WorkerThreadableWebSocketChannel::send(const String& message)
+{
+    if (!m_bridge)
+        return false;
+    return m_bridge->send(message);
+}
+
+unsigned long WorkerThreadableWebSocketChannel::bufferedAmount() const
+{
+    if (!m_bridge)
+        return 0;
+    return m_bridge->bufferedAmount();
+}
+
+void WorkerThreadableWebSocketChannel::close()
+{
+    if (m_bridge)
+        m_bridge->close();
+}
+
+void WorkerThreadableWebSocketChannel::disconnect()
+{
+    m_bridge->disconnect();
+    m_bridge.clear();
+}
+
+void WorkerThreadableWebSocketChannel::suspend()
+{
+    m_workerClientWrapper->suspend();
+    if (m_bridge)
+        m_bridge->suspend();
+}
+
+void WorkerThreadableWebSocketChannel::resume()
+{
+    m_workerClientWrapper->resume();
+    if (m_bridge)
+        m_bridge->resume();
+}
+
+WorkerThreadableWebSocketChannel::Peer::Peer(RefPtr<ThreadableWebSocketChannelClientWrapper> clientWrapper, WorkerLoaderProxy& loaderProxy, ScriptExecutionContext* context, const String& taskMode, const KURL& url, const String& protocol)
+    : m_workerClientWrapper(clientWrapper)
+    , m_loaderProxy(loaderProxy)
+    , m_mainWebSocketChannel(WebSocketChannel::create(context, this, url, protocol))
+    , m_taskMode(taskMode)
+{
+    ASSERT(isMainThread());
+}
+
+WorkerThreadableWebSocketChannel::Peer::~Peer()
+{
+    ASSERT(isMainThread());
+    if (m_mainWebSocketChannel)
+        m_mainWebSocketChannel->disconnect();
+}
+
+void WorkerThreadableWebSocketChannel::Peer::connect()
+{
+    ASSERT(isMainThread());
+    if (!m_mainWebSocketChannel)
+        return;
+    m_mainWebSocketChannel->connect();
+}
+
+static void workerContextDidSend(ScriptExecutionContext* context, RefPtr<ThreadableWebSocketChannelClientWrapper> workerClientWrapper, bool sent)
+{
+    ASSERT_UNUSED(context, context->isWorkerContext());
+    workerClientWrapper->setSent(sent);
+}
+
+void WorkerThreadableWebSocketChannel::Peer::send(const String& message)
+{
+    ASSERT(isMainThread());
+    if (!m_mainWebSocketChannel || !m_workerClientWrapper)
+        return;
+    bool sent = m_mainWebSocketChannel->send(message);
+    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidSend, m_workerClientWrapper, sent), m_taskMode);
+}
+
+static void workerContextDidGetBufferedAmount(ScriptExecutionContext* context, RefPtr<ThreadableWebSocketChannelClientWrapper> workerClientWrapper, unsigned long bufferedAmount)
+{
+    ASSERT_UNUSED(context, context->isWorkerContext());
+    workerClientWrapper->setBufferedAmount(bufferedAmount);
+}
+
+void WorkerThreadableWebSocketChannel::Peer::bufferedAmount()
+{
+    ASSERT(isMainThread());
+    if (!m_mainWebSocketChannel || !m_workerClientWrapper)
+        return;
+    unsigned long bufferedAmount = m_mainWebSocketChannel->bufferedAmount();
+    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidGetBufferedAmount, m_workerClientWrapper, bufferedAmount), m_taskMode);
+}
+
+void WorkerThreadableWebSocketChannel::Peer::close()
+{
+    ASSERT(isMainThread());
+    if (!m_mainWebSocketChannel)
+        return;
+    m_mainWebSocketChannel->close();
+    m_mainWebSocketChannel = 0;
+}
+
+void WorkerThreadableWebSocketChannel::Peer::disconnect()
+{
+    ASSERT(isMainThread());
+    if (!m_mainWebSocketChannel)
+        return;
+    m_mainWebSocketChannel->disconnect();
+    m_mainWebSocketChannel = 0;
+}
+
+void WorkerThreadableWebSocketChannel::Peer::suspend()
+{
+    ASSERT(isMainThread());
+    if (!m_mainWebSocketChannel)
+        return;
+    m_mainWebSocketChannel->suspend();
+}
+
+void WorkerThreadableWebSocketChannel::Peer::resume()
+{
+    ASSERT(isMainThread());
+    if (!m_mainWebSocketChannel)
+        return;
+    m_mainWebSocketChannel->resume();
+}
+
+static void workerContextDidConnect(ScriptExecutionContext* context, RefPtr<ThreadableWebSocketChannelClientWrapper> workerClientWrapper)
+{
+    ASSERT_UNUSED(context, context->isWorkerContext());
+    workerClientWrapper->didConnect();
+}
+
+void WorkerThreadableWebSocketChannel::Peer::didConnect()
+{
+    ASSERT(isMainThread());
+    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidConnect, m_workerClientWrapper), m_taskMode);
+}
+
+static void workerContextDidReceiveMessage(ScriptExecutionContext* context, RefPtr<ThreadableWebSocketChannelClientWrapper> workerClientWrapper, const String& message)
+{
+    ASSERT_UNUSED(context, context->isWorkerContext());
+    workerClientWrapper->didReceiveMessage(message);
+}
+
+void WorkerThreadableWebSocketChannel::Peer::didReceiveMessage(const String& message)
+{
+    ASSERT(isMainThread());
+    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidReceiveMessage, m_workerClientWrapper, message), m_taskMode);
+}
+
+static void workerContextDidClose(ScriptExecutionContext* context, RefPtr<ThreadableWebSocketChannelClientWrapper> workerClientWrapper, unsigned long unhandledBufferedAmount)
+{
+    ASSERT_UNUSED(context, context->isWorkerContext());
+    workerClientWrapper->didClose(unhandledBufferedAmount);
+}
+
+void WorkerThreadableWebSocketChannel::Peer::didClose(unsigned long unhandledBufferedAmount)
+{
+    ASSERT(isMainThread());
+    m_mainWebSocketChannel = 0;
+    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidClose, m_workerClientWrapper, unhandledBufferedAmount), m_taskMode);
+}
+
+void WorkerThreadableWebSocketChannel::Bridge::setWebSocketChannel(ScriptExecutionContext* context, Bridge* thisPtr, Peer* peer, RefPtr<ThreadableWebSocketChannelClientWrapper> workerClientWrapper)
+{
+    ASSERT_UNUSED(context, context->isWorkerContext());
+    thisPtr->m_peer = peer;
+    workerClientWrapper->setSyncMethodDone();
+}
+
+void WorkerThreadableWebSocketChannel::Bridge::mainThreadCreateWebSocketChannel(ScriptExecutionContext* context, Bridge* thisPtr, RefPtr<ThreadableWebSocketChannelClientWrapper> clientWrapper, const String& taskMode, const KURL& url, const String& protocol)
+{
+    ASSERT(isMainThread());
+    ASSERT_UNUSED(context, context->isDocument());
+
+    Peer* peer = Peer::create(clientWrapper, thisPtr->m_loaderProxy, context, taskMode, url, protocol);
+    thisPtr->m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&Bridge::setWebSocketChannel, thisPtr, peer, clientWrapper), taskMode);
+}
+
+WorkerThreadableWebSocketChannel::Bridge::Bridge(PassRefPtr<ThreadableWebSocketChannelClientWrapper> workerClientWrapper, PassRefPtr<WorkerContext> workerContext, const String& taskMode, const KURL& url, const String& protocol)
+    : m_workerClientWrapper(workerClientWrapper)
+    , m_workerContext(workerContext)
+    , m_loaderProxy(m_workerContext->thread()->workerLoaderProxy())
+    , m_taskMode(taskMode)
+    , m_peer(0)
+{
+    ASSERT(m_workerClientWrapper.get());
+    setMethodNotCompleted();
+    m_loaderProxy.postTaskToLoader(createCallbackTask(&Bridge::mainThreadCreateWebSocketChannel, this, m_workerClientWrapper, m_taskMode, url, protocol));
+    waitForMethodCompletion();
+    ASSERT(m_peer);
+}
+
+WorkerThreadableWebSocketChannel::Bridge::~Bridge()
+{
+    disconnect();
+}
+
+void WorkerThreadableWebSocketChannel::mainThreadConnect(ScriptExecutionContext* context, Peer* peer)
+{
+    ASSERT(isMainThread());
+    ASSERT_UNUSED(context, context->isDocument());
+    ASSERT(peer);
+
+    peer->connect();
+}
+
+void WorkerThreadableWebSocketChannel::Bridge::connect()
+{
+    ASSERT(m_workerClientWrapper);
+    ASSERT(m_peer);
+    m_loaderProxy.postTaskToLoader(createCallbackTask(&WorkerThreadableWebSocketChannel::mainThreadConnect, m_peer));
+}
+
+void WorkerThreadableWebSocketChannel::mainThreadSend(ScriptExecutionContext* context, Peer* peer, const String& message)
+{
+    ASSERT(isMainThread());
+    ASSERT_UNUSED(context, context->isDocument());
+    ASSERT(peer);
+
+    peer->send(message);
+}
+
+bool WorkerThreadableWebSocketChannel::Bridge::send(const String& message)
+{
+    if (!m_workerClientWrapper)
+        return false;
+    ASSERT(m_peer);
+    setMethodNotCompleted();
+    m_loaderProxy.postTaskToLoader(createCallbackTask(&WorkerThreadableWebSocketChannel::mainThreadSend, m_peer, message));
+    RefPtr<Bridge> protect(this);
+    waitForMethodCompletion();
+    ThreadableWebSocketChannelClientWrapper* clientWrapper = m_workerClientWrapper.get();
+    return clientWrapper && clientWrapper->sent();
+}
+
+void WorkerThreadableWebSocketChannel::mainThreadBufferedAmount(ScriptExecutionContext* context, Peer* peer)
+{
+    ASSERT(isMainThread());
+    ASSERT_UNUSED(context, context->isDocument());
+    ASSERT(peer);
+
+    peer->bufferedAmount();
+}
+
+unsigned long WorkerThreadableWebSocketChannel::Bridge::bufferedAmount()
+{
+    if (!m_workerClientWrapper)
+        return 0;
+    ASSERT(m_peer);
+    setMethodNotCompleted();
+    m_loaderProxy.postTaskToLoader(createCallbackTask(&WorkerThreadableWebSocketChannel::mainThreadBufferedAmount, m_peer));
+    RefPtr<Bridge> protect(this);
+    waitForMethodCompletion();
+    ThreadableWebSocketChannelClientWrapper* clientWrapper = m_workerClientWrapper.get();
+    if (clientWrapper)
+        return clientWrapper->bufferedAmount();
+    return 0;
+}
+
+void WorkerThreadableWebSocketChannel::mainThreadClose(ScriptExecutionContext* context, Peer* peer)
+{
+    ASSERT(isMainThread());
+    ASSERT_UNUSED(context, context->isDocument());
+    ASSERT(peer);
+
+    peer->close();
+}
+
+void WorkerThreadableWebSocketChannel::Bridge::close()
+{
+    ASSERT(m_peer);
+    m_loaderProxy.postTaskToLoader(createCallbackTask(&WorkerThreadableWebSocketChannel::mainThreadClose, m_peer));
+}
+
+void WorkerThreadableWebSocketChannel::mainThreadDestroy(ScriptExecutionContext* context, Peer* peer)
+{
+    ASSERT(isMainThread());
+    ASSERT_UNUSED(context, context->isDocument());
+    ASSERT(peer);
+
+    delete peer;
+}
+
+void WorkerThreadableWebSocketChannel::Bridge::disconnect()
+{
+    clearClientWrapper();
+    if (m_peer) {
+        Peer* peer = m_peer;
+        m_peer = 0;
+        m_loaderProxy.postTaskToLoader(createCallbackTask(&mainThreadDestroy, peer));
+    }
+    m_workerContext = 0;
+}
+
+void WorkerThreadableWebSocketChannel::mainThreadSuspend(ScriptExecutionContext* context, Peer* peer)
+{
+    ASSERT(isMainThread());
+    ASSERT_UNUSED(context, context->isDocument());
+    ASSERT(peer);
+
+    peer->suspend();
+}
+
+void WorkerThreadableWebSocketChannel::Bridge::suspend()
+{
+    ASSERT(m_peer);
+    m_loaderProxy.postTaskToLoader(createCallbackTask(&WorkerThreadableWebSocketChannel::mainThreadSuspend, m_peer));
+}
+
+void WorkerThreadableWebSocketChannel::mainThreadResume(ScriptExecutionContext* context, Peer* peer)
+{
+    ASSERT(isMainThread());
+    ASSERT_UNUSED(context, context->isDocument());
+    ASSERT(peer);
+
+    peer->resume();
+}
+
+void WorkerThreadableWebSocketChannel::Bridge::resume()
+{
+    ASSERT(m_peer);
+    m_loaderProxy.postTaskToLoader(createCallbackTask(&WorkerThreadableWebSocketChannel::mainThreadResume, m_peer));
+}
+
+void WorkerThreadableWebSocketChannel::Bridge::clearClientWrapper()
+{
+    m_workerClientWrapper->clearClient();
+}
+
+void WorkerThreadableWebSocketChannel::Bridge::setMethodNotCompleted()
+{
+    ASSERT(m_workerClientWrapper);
+    m_workerClientWrapper->clearSyncMethodDone();
+}
+
+// Caller of this function should hold a reference to the bridge, because this function may call WebSocket::didClose() in the end,
+// which causes the bridge to get disconnected from the WebSocket and deleted if there is no other reference.
+void WorkerThreadableWebSocketChannel::Bridge::waitForMethodCompletion()
+{
+    if (!m_workerContext)
+        return;
+    WorkerRunLoop& runLoop = m_workerContext->thread()->runLoop();
+    MessageQueueWaitResult result = MessageQueueMessageReceived;
+    ThreadableWebSocketChannelClientWrapper* clientWrapper = m_workerClientWrapper.get();
+    while (m_workerContext && clientWrapper && !clientWrapper->syncMethodDone() && result != MessageQueueTerminated) {
+        result = runLoop.runInMode(m_workerContext.get(), m_taskMode); // May cause this bridge to get disconnected, which makes m_workerContext become null.
+        clientWrapper = m_workerClientWrapper.get();
+    }
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WEB_SOCKETS)