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https://github.com/LadybirdBrowser/ladybird.git
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03256a2543
Note that it's not actually executing tasks in parallel, it's still throwing them on the HTML event loop task queue, each with its own unique task source. This makes our fetch implementation a lot more robust when HTTP caching is enabled, and you can now click links on https://terminal.shop/ without hitting TODO assertions in fetch.
128 lines
3.6 KiB
C++
128 lines
3.6 KiB
C++
/*
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* Copyright (c) 2021-2024, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/DistinctNumeric.h>
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#include <LibGC/CellAllocator.h>
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#include <LibJS/Heap/Cell.h>
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#include <LibWeb/Forward.h>
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namespace Web::HTML {
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struct UniqueTaskSource;
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AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(u64, TaskID, Comparison);
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class Task final : public JS::Cell {
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GC_CELL(Task, JS::Cell);
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GC_DECLARE_ALLOCATOR(Task);
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public:
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// https://html.spec.whatwg.org/multipage/webappapis.html#generic-task-sources
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enum class Source {
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Unspecified,
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DOMManipulation,
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UserInteraction,
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Networking,
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HistoryTraversal,
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IdleTask,
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PostedMessage,
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Microtask,
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TimerTask,
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JavaScriptEngine,
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// https://w3c.github.io/geolocation/#dfn-geolocation-task-source
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Geolocation,
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// https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#bitmap-task-source
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BitmapTask,
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// https://html.spec.whatwg.org/multipage/webappapis.html#navigation-and-traversal-task-source
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NavigationAndTraversal,
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// https://w3c.github.io/FileAPI/#fileReadingTaskSource
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FileReading,
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// https://www.w3.org/TR/intersection-observer/#intersectionobserver-task-source
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IntersectionObserver,
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// https://w3c.github.io/performance-timeline/#dfn-performance-timeline-task-source
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PerformanceTimeline,
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// https://html.spec.whatwg.org/multipage/canvas.html#canvas-blob-serialisation-task-source
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CanvasBlobSerializationTask,
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// https://w3c.github.io/clipboard-apis/#clipboard-task-source
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Clipboard,
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// https://w3c.github.io/permissions/#permissions-task-source
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Permissions,
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// https://drafts.csswg.org/css-font-loading/#task-source
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FontLoading,
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// https://html.spec.whatwg.org/multipage/server-sent-events.html#remote-event-task-source
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RemoteEvent,
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// https://html.spec.whatwg.org/multipage/webappapis.html#rendering-task-source
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Rendering,
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// https://w3c.github.io/IndexedDB/#database-access-task-source
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DatabaseAccess,
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// https://websockets.spec.whatwg.org/#websocket-task-source
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WebSocket,
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// https://w3c.github.io/media-capabilities/#media-capabilities-task-source
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MediaCapabilities,
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// !!! IMPORTANT: Keep this field last!
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// This serves as the base value of all unique task sources.
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// Some elements, such as the HTMLMediaElement, must have a unique task source per instance.
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UniqueTaskSourceStart
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};
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static GC::Ref<Task> create(JS::VM&, Source, GC::Ptr<DOM::Document const>, GC::Ref<GC::Function<void()>> steps);
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virtual ~Task() override;
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[[nodiscard]] TaskID id() const { return m_id; }
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Source source() const { return m_source; }
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void execute();
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DOM::Document const* document() const;
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bool is_runnable() const;
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private:
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Task(Source, GC::Ptr<DOM::Document const>, GC::Ref<GC::Function<void()>> steps);
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virtual void visit_edges(Visitor&) override;
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TaskID m_id {};
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Source m_source { Source::Unspecified };
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GC::Ref<GC::Function<void()>> m_steps;
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GC::Ptr<DOM::Document const> m_document;
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};
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struct UniqueTaskSource {
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UniqueTaskSource();
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~UniqueTaskSource();
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Task::Source const source;
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};
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class ParallelQueue : public RefCounted<ParallelQueue> {
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public:
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static NonnullRefPtr<ParallelQueue> create();
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TaskID enqueue(GC::Ref<GC::Function<void()>>);
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private:
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UniqueTaskSource m_task_source;
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};
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}
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