mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
83 lines
3.0 KiB
C++
83 lines
3.0 KiB
C++
/*
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* Copyright (C) 2017-2020 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
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* are met:
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* 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 "JSRunLoopTimer.h"
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#include "Strong.h"
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#include <wtf/Deque.h>
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#include <wtf/HashMap.h>
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#include <wtf/Lock.h>
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#include <wtf/Vector.h>
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namespace JSC {
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class JSPromise;
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class VM;
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class JSCell;
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class JS_EXPORT_PRIVATE DeferredWorkTimer final : public JSRunLoopTimer {
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public:
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using Base = JSRunLoopTimer;
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void doWork(VM&) final;
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using Ticket = JSObject*;
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void addPendingWork(VM&, Ticket, Vector<Strong<JSCell>>&& dependencies);
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bool hasPendingWork(Ticket);
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bool hasDependancyInPendingWork(Ticket, JSCell* dependency);
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bool cancelPendingWork(Ticket);
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// If the script execution owner your ticket is associated with gets canceled
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// the Task will not be called and will be deallocated. So it's important
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// to make sure your memory ownership model won't leak memory when
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// this occurs. The easiest way is to make sure everything is either owned
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// by a GC'd value in dependencies or by the Task lambda.
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using Task = Function<void()>;
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void scheduleWorkSoon(Ticket, Task&&);
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void didResumeScriptExecutionOwner();
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void stopRunningTasks() { m_runTasks = false; }
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void runRunLoop();
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static Ref<DeferredWorkTimer> create(VM& vm) { return adoptRef(*new DeferredWorkTimer(vm)); }
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private:
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DeferredWorkTimer(VM&);
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Lock m_taskLock;
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bool m_runTasks { true };
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bool m_shouldStopRunLoopWhenAllTicketsFinish { false };
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bool m_currentlyRunningTask { false };
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Deque<std::tuple<Ticket, Task>> m_tasks;
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struct TicketData {
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Vector<Strong<JSCell>> dependencies;
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Strong<JSObject> scriptExecutionOwner;
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};
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HashMap<Ticket, TicketData> m_pendingTickets;
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};
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} // namespace JSC
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