WorkerMessagingProxy.h   [plain text]


/*
 * Copyright (C) 2008-2017 Apple Inc. All Rights Reserved.
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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#pragma once

#include "WorkerGlobalScopeProxy.h"
#include "WorkerDebuggerProxy.h"
#include "WorkerLoaderProxy.h"
#include "WorkerObjectProxy.h"
#include <wtf/MonotonicTime.h>
#include <wtf/ThreadSafeRefCounted.h>

namespace WebCore {

class DedicatedWorkerThread;
class WorkerInspectorProxy;

class WorkerMessagingProxy final : public ThreadSafeRefCounted<WorkerMessagingProxy>, public WorkerGlobalScopeProxy, public WorkerObjectProxy, public WorkerLoaderProxy, public WorkerDebuggerProxy {
    WTF_MAKE_FAST_ALLOCATED;
public:
    explicit WorkerMessagingProxy(Worker&);
    virtual ~WorkerMessagingProxy();

private:
    // Implementations of WorkerGlobalScopeProxy.
    // (Only use these functions in the worker object thread.)
    void startWorkerGlobalScope(const URL& scriptURL, const String& name, const String& userAgent, bool isOnline, const String& sourceCode, const ContentSecurityPolicyResponseHeaders&, bool shouldBypassMainWorldContentSecurityPolicy, MonotonicTime timeOrigin, JSC::RuntimeFlags, PAL::SessionID) final;
    void terminateWorkerGlobalScope() final;
    void postMessageToWorkerGlobalScope(MessageWithMessagePorts&&) final;
    bool hasPendingActivity() const final;
    void workerObjectDestroyed() final;
    void notifyNetworkStateChange(bool isOnline) final;

    // Implementation of WorkerObjectProxy.
    // (Only use these functions in the worker context thread.)
    void postMessageToWorkerObject(MessageWithMessagePorts&&) final;
    void postExceptionToWorkerObject(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL) final;
    void confirmMessageFromWorkerObject(bool hasPendingActivity) final;
    void reportPendingActivity(bool hasPendingActivity) final;
    void workerGlobalScopeClosed() final;
    void workerGlobalScopeDestroyed() final;

    // Implementation of WorkerDebuggerProxy.
    // (Only use these functions in the worker context thread.)
    void postMessageToDebugger(const String&) final;
    void setResourceCachingDisabled(bool) final;

    // Implementation of WorkerLoaderProxy.
    // These functions are called on different threads to schedule loading
    // requests and to send callbacks back to WorkerGlobalScope.
    void postTaskToLoader(ScriptExecutionContext::Task&&) final;
    bool postTaskForModeToWorkerGlobalScope(ScriptExecutionContext::Task&&, const String& mode) final;
    Ref<CacheStorageConnection> createCacheStorageConnection() final;

    void workerThreadCreated(DedicatedWorkerThread&);

    // Only use this method on the worker object thread.
    bool askedToTerminate() const { return m_askedToTerminate; }

    void workerGlobalScopeDestroyedInternal();
    void reportPendingActivityInternal(bool confirmingMessage, bool hasPendingActivity);
    Worker* workerObject() const { return m_workerObject; }

    RefPtr<ScriptExecutionContext> m_scriptExecutionContext;
    std::unique_ptr<WorkerInspectorProxy> m_inspectorProxy;
    Worker* m_workerObject;
    bool m_mayBeDestroyed { false };
    RefPtr<DedicatedWorkerThread> m_workerThread;

    unsigned m_unconfirmedMessageCount { 0 }; // Unconfirmed messages from worker object to worker thread.
    bool m_workerThreadHadPendingActivity { false }; // The latest confirmation from worker thread reported that it was still active.

    bool m_askedToTerminate { false };

    Vector<std::unique_ptr<ScriptExecutionContext::Task>> m_queuedEarlyTasks; // Tasks are queued here until there's a thread object created.
};

} // namespace WebCore