119 lines
2.6 KiB
C++
119 lines
2.6 KiB
C++
#ifndef event_manager_hh_INCLUDED
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#define event_manager_hh_INCLUDED
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#include "clock.hh"
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#include "meta.hh"
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#include "utils.hh"
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#include "vector.hh"
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#include <functional>
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#include <sys/select.h>
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#include <csignal>
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namespace Kakoune
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{
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enum class EventMode
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{
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Normal,
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Urgent,
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};
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enum class FdEvents
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{
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None = 0,
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Read = 1 << 0,
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Write = 1 << 1,
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Except = 1 << 2,
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};
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constexpr bool with_bit_ops(Meta::Type<FdEvents>) { return true; }
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class FDWatcher
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{
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public:
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using Callback = std::function<void (FDWatcher& watcher, FdEvents events, EventMode mode)>;
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FDWatcher(int fd, FdEvents events, EventMode mode, Callback callback);
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FDWatcher(const FDWatcher&) = delete;
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FDWatcher& operator=(const FDWatcher&) = delete;
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~FDWatcher();
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int fd() const { return m_fd; }
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FdEvents events() const { return m_events; }
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FdEvents& events() { return m_events; }
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EventMode mode() const { return m_mode; }
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void run(FdEvents events, EventMode mode);
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void reset_fd(int fd) { m_fd = fd; }
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void close_fd();
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void disable() { m_fd = -1; }
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private:
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int m_fd;
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FdEvents m_events;
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EventMode m_mode;
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Callback m_callback;
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};
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class Timer
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{
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public:
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using Callback = std::function<void (Timer& timer)>;
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Timer(TimePoint date, Callback callback,
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EventMode mode = EventMode::Normal);
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Timer(const Timer&) = delete;
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Timer& operator=(const Timer&) = delete;
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~Timer();
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TimePoint next_date() const { return m_date; }
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void set_next_date(TimePoint date) { m_date = date; }
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void disable() { m_date = TimePoint::max(); }
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void run(EventMode mode);
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private:
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TimePoint m_date;
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EventMode m_mode;
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Callback m_callback;
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};
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// The EventManager provides an interface to file descriptor
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// based event handling.
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//
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// The program main loop should call handle_next_events()
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// until it's time to quit.
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class EventManager : public Singleton<EventManager>
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{
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public:
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EventManager();
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~EventManager();
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bool handle_next_events(EventMode mode, sigset_t* sigmask = nullptr, bool block = true);
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// force the watchers associated with fd to be executed
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// on next handle_next_events call.
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void force_signal(int fd);
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static void handle_urgent_events();
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private:
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friend class FDWatcher;
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friend class Timer;
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Vector<FDWatcher*, MemoryDomain::Events> m_fd_watchers;
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Vector<Timer*, MemoryDomain::Events> m_timers;
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fd_set m_forced_fd;
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bool m_has_forced_fd = false;
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TimePoint m_last;
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};
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using SignalHandler = void(*)(int);
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SignalHandler set_signal_handler(int signum, SignalHandler handler);
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}
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#endif // event_manager_hh_INCLUDED
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