bfd354492e
With this change, we now have ~1200 CellAllocators across both LibJS and LibWeb in a normal WebContent instance. This gives us a minimum heap size of 4.7 MiB in the scenario where we only have one cell allocated per type. Of course, in practice there will be many more of each type, so the effective overhead is quite a bit smaller than that in practice. I left a few types unconverted to this mechanism because I got tired of doing this. :^)
119 lines
3.6 KiB
C++
119 lines
3.6 KiB
C++
/*
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* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/DOM/AbortSignal.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/EventDispatcher.h>
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#include <LibWeb/HTML/EventHandler.h>
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namespace Web::DOM {
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JS_DEFINE_ALLOCATOR(AbortSignal);
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WebIDL::ExceptionOr<JS::NonnullGCPtr<AbortSignal>> AbortSignal::construct_impl(JS::Realm& realm)
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{
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return realm.heap().allocate<AbortSignal>(realm, realm);
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}
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AbortSignal::AbortSignal(JS::Realm& realm)
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: EventTarget(realm)
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{
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}
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void AbortSignal::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::AbortSignalPrototype>(realm, "AbortSignal"));
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}
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// https://dom.spec.whatwg.org/#abortsignal-add
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void AbortSignal::add_abort_algorithm(Function<void()> abort_algorithm)
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{
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// 1. If signal is aborted, then return.
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if (aborted())
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return;
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// 2. Append algorithm to signal’s abort algorithms.
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m_abort_algorithms.append(JS::create_heap_function(vm().heap(), move(abort_algorithm)));
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}
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// https://dom.spec.whatwg.org/#abortsignal-signal-abort
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void AbortSignal::signal_abort(JS::Value reason)
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{
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// 1. If signal is aborted, then return.
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if (aborted())
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return;
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// 2. Set signal’s abort reason to reason if it is given; otherwise to a new "AbortError" DOMException.
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if (!reason.is_undefined())
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m_abort_reason = reason;
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else
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m_abort_reason = WebIDL::AbortError::create(realm(), "Aborted without reason"_fly_string).ptr();
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// 3. For each algorithm in signal’s abort algorithms: run algorithm.
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for (auto& algorithm : m_abort_algorithms)
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algorithm->function()();
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// 4. Empty signal’s abort algorithms.
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m_abort_algorithms.clear();
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// 5. Fire an event named abort at signal.
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dispatch_event(Event::create(realm(), HTML::EventNames::abort));
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}
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void AbortSignal::set_onabort(WebIDL::CallbackType* event_handler)
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{
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set_event_handler_attribute(HTML::EventNames::abort, event_handler);
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}
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WebIDL::CallbackType* AbortSignal::onabort()
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{
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return event_handler_attribute(HTML::EventNames::abort);
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}
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// https://dom.spec.whatwg.org/#dom-abortsignal-throwifaborted
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JS::ThrowCompletionOr<void> AbortSignal::throw_if_aborted() const
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{
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// The throwIfAborted() method steps are to throw this’s abort reason, if this is aborted.
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if (!aborted())
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return {};
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return JS::throw_completion(m_abort_reason);
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}
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void AbortSignal::visit_edges(JS::Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_abort_reason);
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for (auto& algorithm : m_abort_algorithms)
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visitor.visit(algorithm);
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}
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// https://dom.spec.whatwg.org/#abortsignal-follow
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void AbortSignal::follow(JS::NonnullGCPtr<AbortSignal> parent_signal)
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{
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// A followingSignal (an AbortSignal) is made to follow a parentSignal (an AbortSignal) by running these steps:
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// 1. If followingSignal is aborted, then return.
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if (aborted())
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return;
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// 2. If parentSignal is aborted, then signal abort on followingSignal with parentSignal’s abort reason.
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if (parent_signal->aborted()) {
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signal_abort(parent_signal->reason());
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return;
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}
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// 3. Otherwise, add the following abort steps to parentSignal:
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// NOTE: `this` and `parent_signal` are protected by AbortSignal using JS::SafeFunction.
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parent_signal->add_abort_algorithm([this, parent_signal] {
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// 1. Signal abort on followingSignal with parentSignal’s abort reason.
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signal_abort(parent_signal->reason());
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});
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}
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}
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