/* * Copyright (C) 2017 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. ``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 * 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. */ #pragma once #include "JSRunLoopTimer.h" #include "Strong.h" #include <wtf/HashMap.h> #include <wtf/Lock.h> #include <wtf/Vector.h> namespace JSC { class JSPromiseDeferred; class VM; class JSCell; class PromiseDeferredTimer : public JSRunLoopTimer { public: using Base = JSRunLoopTimer; PromiseDeferredTimer(VM&); void doWork(VM&) override; void addPendingPromise(VM&, JSPromiseDeferred*, Vector<Strong<JSCell>>&& dependencies); JS_EXPORT_PRIVATE bool hasPendingPromise(JSPromiseDeferred* ticket); JS_EXPORT_PRIVATE bool hasDependancyInPendingPromise(JSPromiseDeferred* ticket, JSCell* dependency); // JSPromiseDeferred should handle canceling when the promise is resolved or rejected. bool cancelPendingPromise(JSPromiseDeferred*); using Task = Function<void()>; void scheduleWorkSoon(JSPromiseDeferred*, Task&&); void stopRunningTasks() { m_runTasks = false; } JS_EXPORT_PRIVATE void runRunLoop(); private: HashMap<JSPromiseDeferred*, Vector<Strong<JSCell>>> m_pendingPromises; Lock m_taskLock; bool m_runTasks { true }; bool m_shouldStopRunLoopWhenAllPromisesFinish { false }; bool m_currentlyRunningTask { false }; Vector<std::tuple<JSPromiseDeferred*, Task>> m_tasks; }; } // namespace JSC