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LibWeb+WebWorker: Move worker execution into a new WebWorker process

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We now create a WorkerAgent for the parent context, which is currently
only a Window. Note that Workers can have Workers per the spec.

The WorkerAgent spawns a WebWorker process to hold the actual
script execution of the Worker. This is modeled with the
DedicatedWorkerHost object in the WebWorker process.
A start_dedicated_worker IPC method in the WebWorker IPC creates the
WorkerHost object. Future different worker types may use different IPC
messages to create their WorkerHost instance.

This implementation cannot yet postMessage between the parent and the
child processes.

Co-Authored-By: Andreas Kling <kling@serenityos.org>
This commit is contained in:
Andrew Kaster 2023-11-08 11:47:41 -07:00 • committed by Andreas Kling
parent 3dbbb5b263
commit 124c378472
31 changed files with 998 additions and 267 deletions
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21
Userland/Libraries/LibWeb/HTML/WorkerGlobalScope.h
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@ -41,6 +41,16 @@ public:
virtual Bindings::PlatformObject& this_impl() override { return *this; }
virtual Bindings::PlatformObject const& this_impl() const override { return *this; }
using WindowOrWorkerGlobalScopeMixin::atob;
using WindowOrWorkerGlobalScopeMixin::btoa;
using WindowOrWorkerGlobalScopeMixin::clear_interval;
using WindowOrWorkerGlobalScopeMixin::clear_timeout;
using WindowOrWorkerGlobalScopeMixin::fetch;
using WindowOrWorkerGlobalScopeMixin::queue_microtask;
using WindowOrWorkerGlobalScopeMixin::set_interval;
using WindowOrWorkerGlobalScopeMixin::set_timeout;
using WindowOrWorkerGlobalScopeMixin::structured_clone;
// Following methods are from the WorkerGlobalScope IDL definition
// https://html.spec.whatwg.org/multipage/workers.html#the-workerglobalscope-common-interface
@ -67,16 +77,17 @@ public:
// this is not problematic as it cannot be observed from script.
void set_location(JS::NonnullGCPtr<WorkerLocation> loc) { m_location = move(loc); }
void initialize_web_interfaces(Badge<WorkerEnvironmentSettingsObject>);
Web::Page* page() { return &m_page; }
protected:
explicit WorkerGlobalScope(JS::Realm&);
explicit WorkerGlobalScope(JS::Realm&, Web::Page&);
private:
virtual void initialize(JS::Realm&) override;
virtual void visit_edges(Cell::Visitor&) override;
JS::GCPtr<WorkerLocation> m_location;
JS::GCPtr<WorkerNavigator> m_navigator;
// FIXME: Add all these internal slots
@ -110,6 +121,8 @@ private:
// https://html.spec.whatwg.org/multipage/workers.html#concept-workerglobalscope-cross-origin-isolated-capability
bool m_cross_origin_isolated_capability { false };
Web::Page& m_page;
};
}