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123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/Forward.h>
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#include <AK/Function.h>
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#include <AK/HashMap.h>
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#include <AK/Noncopyable.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/Vector.h>
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#include <AK/WeakPtr.h>
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#include <LibCore/Forward.h>
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#include <sys/time.h>
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#include <sys/types.h>
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namespace Core {
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class EventLoop {
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public:
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EventLoop();
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~EventLoop();
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int exec();
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enum class WaitMode {
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WaitForEvents,
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PollForEvents,
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};
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// processe events, generally called by exec() in a loop.
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// this should really only be used for integrating with other event loops
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void pump(WaitMode = WaitMode::WaitForEvents);
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void post_event(Object& receiver, NonnullOwnPtr<Event>&&);
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static EventLoop& main();
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static EventLoop& current();
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bool was_exit_requested() const { return m_exit_requested; }
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static int register_timer(Object&, int milliseconds, bool should_reload, TimerShouldFireWhenNotVisible);
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static bool unregister_timer(int timer_id);
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static void register_notifier(Badge<Notifier>, Notifier&);
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static void unregister_notifier(Badge<Notifier>, Notifier&);
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void quit(int);
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void unquit();
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void take_pending_events_from(EventLoop& other)
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{
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m_queued_events.append(move(other.m_queued_events));
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}
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static void wake();
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static int register_signal(int signo, Function<void(int)> handler);
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static void unregister_signal(int handler_id);
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// Note: Boost uses Parent/Child/Prepare, but we don't really have anything
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// interesting to do in the parent or before forking.
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enum class ForkEvent {
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Child,
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};
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static void notify_forked(ForkEvent);
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private:
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bool start_rpc_server();
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void wait_for_event(WaitMode);
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Optional<struct timeval> get_next_timer_expiration();
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static void dispatch_signal(int);
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static void handle_signal(int);
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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>);
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QueuedEvent(QueuedEvent&&);
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~QueuedEvent();
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WeakPtr<Object> receiver;
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NonnullOwnPtr<Event> event;
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};
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Vector<QueuedEvent, 64> m_queued_events;
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static pid_t s_pid;
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bool m_exit_requested { false };
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int m_exit_code { 0 };
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static int s_wake_pipe_fds[2];
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struct Private;
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NonnullOwnPtr<Private> m_private;
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};
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}
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