140 lines
6.5 KiB
C++
140 lines
6.5 KiB
C++
/*
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* Copyright (C) 2009 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "NetworkLoadMetrics.h"
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#include "ThreadableLoader.h"
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#include "ThreadableLoaderClient.h"
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#include "ThreadableLoaderClientWrapper.h"
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#include <wtf/text/WTFString.h>
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namespace WebCore {
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class ContentSecurityPolicy;
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class DocumentThreadableLoader;
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class ResourceError;
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class ResourceRequest;
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class SecurityOrigin;
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class WorkerOrWorkletGlobalScope;
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class WorkerLoaderProxy;
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class WorkerThreadableLoader : public RefCounted<WorkerThreadableLoader>, public ThreadableLoader {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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static void loadResourceSynchronously(WorkerOrWorkletGlobalScope&, ResourceRequest&&, ThreadableLoaderClient&, const ThreadableLoaderOptions&);
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static Ref<WorkerThreadableLoader> create(WorkerOrWorkletGlobalScope& WorkerOrWorkletGlobalScope, ThreadableLoaderClient& client, const String& taskMode, ResourceRequest&& request, const ThreadableLoaderOptions& options, const String& referrer)
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{
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return adoptRef(*new WorkerThreadableLoader(WorkerOrWorkletGlobalScope, client, taskMode, WTFMove(request), options, referrer));
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}
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~WorkerThreadableLoader();
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void cancel() override;
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bool done() const { return m_workerClientWrapper->done(); }
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void notifyIsDone(bool isDone);
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using RefCounted<WorkerThreadableLoader>::ref;
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using RefCounted<WorkerThreadableLoader>::deref;
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protected:
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void refThreadableLoader() override { ref(); }
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void derefThreadableLoader() override { deref(); }
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private:
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// Creates a loader on the main thread and bridges communication between
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// the main thread and the worker context's thread where WorkerThreadableLoader runs.
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//
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// Regarding the bridge and lifetimes of items used in callbacks, there are a few cases:
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//
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// all cases. All tasks posted from the worker context's thread are ok because
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// the last task posted always is "mainThreadDestroy", so MainThreadBridge is
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// around for all tasks that use it on the main thread.
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//
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// case 1. worker.terminate is called.
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// In this case, no more tasks are posted from the worker object's thread to the worker
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// context's thread -- WorkerOrWorkletGlobalScopeProxy implementation enforces this.
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//
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// case 2. xhr gets aborted and the worker context continues running.
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// The ThreadableLoaderClientWrapper has the underlying client cleared, so no more calls
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// go through it. All tasks posted from the worker object's thread to the worker context's
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// thread contain the RefPtr<ThreadableLoaderClientWrapper> object, so the
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// ThreadableLoaderClientWrapper instance is there until all tasks are executed.
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class MainThreadBridge : public ThreadableLoaderClient {
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public:
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// All executed on the worker context's thread.
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MainThreadBridge(ThreadableLoaderClientWrapper&, WorkerLoaderProxy&, const String& taskMode, ResourceRequest&&, const ThreadableLoaderOptions&, const String& outgoingReferrer, WorkerOrWorkletGlobalScope&);
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void cancel();
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void destroy();
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void computeIsDone();
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private:
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// Executed on the worker context's thread.
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void clearClientWrapper();
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// All executed on the main thread.
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void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent) override;
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void didReceiveResponse(unsigned long identifier, const ResourceResponse&) override;
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void didReceiveData(const uint8_t*, int dataLength) override;
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void didFinishLoading(unsigned long identifier) override;
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void didFail(const ResourceError&) override;
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void didFinishTiming(const ResourceTiming&) override;
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void notifyIsDone(bool isDone) final;
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// Only to be used on the main thread.
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RefPtr<DocumentThreadableLoader> m_mainThreadLoader;
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bool m_loadingFinished { false };
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// ThreadableLoaderClientWrapper is to be used on the worker context thread.
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// The ref counting is done on either thread.
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RefPtr<ThreadableLoaderClientWrapper> m_workerClientWrapper;
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// May be used on either thread.
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WorkerLoaderProxy& m_loaderProxy;
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// For use on the main thread.
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String m_taskMode;
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unsigned long m_workerRequestIdentifier { 0 };
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NetworkLoadMetrics m_networkLoadMetrics;
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};
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WorkerThreadableLoader(WorkerOrWorkletGlobalScope&, ThreadableLoaderClient&, const String& taskMode, ResourceRequest&&, const ThreadableLoaderOptions&, const String& referrer);
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void computeIsDone() final;
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Ref<WorkerOrWorkletGlobalScope> m_WorkerOrWorkletGlobalScope;
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Ref<ThreadableLoaderClientWrapper> m_workerClientWrapper;
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MainThreadBridge& m_bridge;
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};
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} // namespace WebCore
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