102 lines
3.7 KiB
C++
102 lines
3.7 KiB
C++
/*
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* Copyright (C) 2009 Google Inc. All rights reserved.
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* Copyright (C) 2017 Apple 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 "ScriptExecutionContext.h"
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#include <memory>
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#include <wtf/MessageQueue.h>
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namespace WebCore {
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class ModePredicate;
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class WorkerOrWorkletGlobalScope;
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class WorkerSharedTimer;
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class WorkerRunLoop {
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public:
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WorkerRunLoop();
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~WorkerRunLoop();
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// Blocking call. Waits for tasks and timers, invokes the callbacks.
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void run(WorkerOrWorkletGlobalScope*);
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enum WaitMode { WaitForMessage, DontWaitForMessage };
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// Waits for a single task and returns.
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MessageQueueWaitResult runInMode(WorkerOrWorkletGlobalScope*, const String& mode, WaitMode = WaitForMessage);
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MessageQueueWaitResult runInDebuggerMode(WorkerOrWorkletGlobalScope&);
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void terminate();
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bool terminated() const { return m_messageQueue.killed(); }
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void postTask(ScriptExecutionContext::Task&&);
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void postTaskAndTerminate(ScriptExecutionContext::Task&&);
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WEBCORE_EXPORT void postTaskForMode(ScriptExecutionContext::Task&&, const String& mode);
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void postDebuggerTask(ScriptExecutionContext::Task&&);
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unsigned long createUniqueId() { return ++m_uniqueId; }
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WEBCORE_EXPORT static String defaultMode();
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class Task {
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WTF_MAKE_NONCOPYABLE(Task); WTF_MAKE_FAST_ALLOCATED;
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public:
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Task(ScriptExecutionContext::Task&&, const String& mode);
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const String& mode() const { return m_mode; }
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private:
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void performTask(WorkerOrWorkletGlobalScope*);
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ScriptExecutionContext::Task m_task;
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String m_mode;
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friend class WorkerRunLoop;
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};
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private:
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friend class RunLoopSetup;
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MessageQueueWaitResult runInMode(WorkerOrWorkletGlobalScope*, const ModePredicate&, WaitMode);
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// Runs any clean up tasks that are currently in the queue and returns.
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// This should only be called when the context is closed or loop has been terminated.
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void runCleanupTasks(WorkerOrWorkletGlobalScope*);
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bool isBeingDebugged() const { return m_debugCount >= 1; }
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MessageQueue<Task> m_messageQueue;
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std::unique_ptr<WorkerSharedTimer> m_sharedTimer;
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int m_nestedCount { 0 };
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int m_debugCount { 0 };
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unsigned long m_uniqueId { 0 };
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};
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} // namespace WebCore
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