mirror of
https://github.com/RGBCube/serenity
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7b963e1e98
Things such as timers and notifiers aren't specific to one instance of Core::EventLoop, so let's not tie them down to EventLoopImplementation. Instead, move those APIs + signals & a few other things to a new EventLoopManager interface. EventLoopManager also knows how to create a new EventLoopImplementation object.
127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
/*
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* Copyright (c) 2023, Andreas Kling <kling@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 <AK/Vector.h>
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#include <LibCore/DeferredInvocationContext.h>
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#include <LibCore/EventLoopImplementation.h>
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#include <LibCore/Object.h>
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#include <LibCore/Promise.h>
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#include <LibCore/ThreadEventQueue.h>
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#include <LibThreading/Mutex.h>
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namespace Core {
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struct ThreadEventQueue::Private {
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struct QueuedEvent {
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AK_MAKE_NONCOPYABLE(QueuedEvent);
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public:
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QueuedEvent(Object& receiver, NonnullOwnPtr<Event> event)
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: receiver(receiver)
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, event(move(event))
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{
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}
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QueuedEvent(QueuedEvent&& other)
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: receiver(other.receiver)
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, event(move(other.event))
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{
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}
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~QueuedEvent() = default;
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WeakPtr<Object> receiver;
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NonnullOwnPtr<Event> event;
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};
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Threading::Mutex mutex;
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Vector<QueuedEvent, 128> queued_events;
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Vector<NonnullRefPtr<Promise<NonnullRefPtr<Object>>>, 16> pending_promises;
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bool warned_promise_count { false };
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};
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static thread_local ThreadEventQueue* s_current_thread_event_queue;
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ThreadEventQueue& ThreadEventQueue::current()
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{
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if (!s_current_thread_event_queue) {
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// FIXME: Don't leak these.
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s_current_thread_event_queue = new ThreadEventQueue;
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}
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return *s_current_thread_event_queue;
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}
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ThreadEventQueue::ThreadEventQueue()
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: m_private(make<Private>())
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{
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}
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ThreadEventQueue::~ThreadEventQueue() = default;
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void ThreadEventQueue::post_event(Core::Object& receiver, NonnullOwnPtr<Core::Event> event)
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{
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{
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Threading::MutexLocker lock(m_private->mutex);
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m_private->queued_events.empend(receiver, move(event));
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}
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Core::EventLoopManager::the().did_post_event();
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}
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void ThreadEventQueue::add_job(NonnullRefPtr<Promise<NonnullRefPtr<Object>>> promise)
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{
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Threading::MutexLocker lock(m_private->mutex);
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m_private->pending_promises.append(move(promise));
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}
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size_t ThreadEventQueue::process()
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{
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decltype(m_private->queued_events) events;
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{
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Threading::MutexLocker locker(m_private->mutex);
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events = move(m_private->queued_events);
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m_private->pending_promises.remove_all_matching([](auto& job) { return job->is_resolved() || job->is_canceled(); });
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}
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size_t processed_events = 0;
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for (size_t i = 0; i < events.size(); ++i) {
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auto& queued_event = events.at(i);
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auto receiver = queued_event.receiver.strong_ref();
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auto& event = *queued_event.event;
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if (!receiver) {
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switch (event.type()) {
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case Event::Quit:
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VERIFY_NOT_REACHED();
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default:
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// Receiver disappeared, drop the event on the floor.
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break;
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}
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} else if (event.type() == Event::Type::DeferredInvoke) {
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static_cast<DeferredInvocationEvent&>(event).m_invokee();
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} else {
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NonnullRefPtr<Object> protector(*receiver);
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receiver->dispatch_event(event);
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}
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++processed_events;
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}
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{
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Threading::MutexLocker locker(m_private->mutex);
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if (m_private->pending_promises.size() > 30 && !m_private->warned_promise_count) {
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m_private->warned_promise_count = true;
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dbgln("ThreadEventQueue::process: Job queue wasn't designed for this load ({} promises)", m_private->pending_promises.size());
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}
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}
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return processed_events;
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}
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bool ThreadEventQueue::has_pending_events() const
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{
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Threading::MutexLocker locker(m_private->mutex);
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return !m_private->queued_events.is_empty();
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}
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}
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