ladybird/Userland/Libraries/LibWeb/HTML/EventLoop/TaskQueue.h
Andreas Kling a248ec63e3 LibWeb: Implement window.queueMicrotask(callback)
This API allows authors to schedule a serialized JS callback that will
get invoked at the next spec-allowed opportunity.
2021-09-26 14:39:14 +02:00

38 lines
776 B
C++

/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Queue.h>
#include <LibWeb/HTML/EventLoop/Task.h>
namespace Web::HTML {
class TaskQueue {
public:
explicit TaskQueue(HTML::EventLoop&);
~TaskQueue();
bool is_empty() const { return m_tasks.is_empty(); }
void add(NonnullOwnPtr<HTML::Task>);
OwnPtr<HTML::Task> take_first_runnable() { return m_tasks.dequeue(); }
void enqueue(NonnullOwnPtr<HTML::Task> task) { add(move(task)); }
OwnPtr<HTML::Task> dequeue()
{
if (m_tasks.is_empty())
return {};
return m_tasks.dequeue();
}
private:
HTML::EventLoop& m_event_loop;
Queue<NonnullOwnPtr<HTML::Task>> m_tasks;
};
}