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b572ae95a9
The DeferredInvocationContext only existed to satisfy the requirement in ThreadEventQueue that each event has an EventReceiver. However, deferred_invoke() was not even using the EventReceiver to call its callback. Therefore, we don't need to allocate one for every deferred invocation. This also prevents WeakPtr::strong_ref() from racing and leaking the context object when invoking a function across threads.
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/*
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* Copyright (c) 2023, 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/NonnullOwnPtr.h>
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#include <AK/OwnPtr.h>
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#include <LibCore/Forward.h>
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namespace Core {
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// Per-thread global event queue. This is where events are queued for the EventLoop to process.
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// There is only one ThreadEventQueue per thread, and it is accessed via ThreadEventQueue::current().
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// It is allowed to post events to other threads' event queues.
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class ThreadEventQueue {
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AK_MAKE_NONCOPYABLE(ThreadEventQueue);
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AK_MAKE_NONMOVABLE(ThreadEventQueue);
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public:
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static ThreadEventQueue& current();
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// Process all queued events. Returns the number of events that were processed.
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size_t process();
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// Posts an event to the event queue.
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void post_event(EventReceiver*, NonnullOwnPtr<Event>);
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// Used by Threading::BackgroundAction.
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void add_job(NonnullRefPtr<Promise<NonnullRefPtr<EventReceiver>>>);
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void cancel_all_pending_jobs();
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// Returns true if there are events waiting to be flushed.
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bool has_pending_events() const;
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private:
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ThreadEventQueue();
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~ThreadEventQueue();
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struct Private;
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OwnPtr<Private> m_private;
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};
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}
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