98 lines
2.0 KiB
C++
98 lines
2.0 KiB
C++
#ifndef event_manager_hh_INCLUDED
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#define event_manager_hh_INCLUDED
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#include "utils.hh"
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#include "flags.hh"
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#include "vector.hh"
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#include <chrono>
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#include <functional>
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#include <sys/select.h>
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#include <signal.h>
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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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Pending
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};
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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, EventMode mode)>;
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FDWatcher(int fd, 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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void run(EventMode mode);
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void close_fd();
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bool closed() const { return m_fd == -1; }
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private:
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int m_fd;
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Callback m_callback;
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};
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using Clock = std::chrono::steady_clock;
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using TimePoint = Clock::time_point;
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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 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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void handle_next_events(EventMode mode, sigset_t* sigmask = nullptr);
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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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private:
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friend class FDWatcher;
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friend class Timer;
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Vector<FDWatcher*> m_fd_watchers;
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Vector<Timer*> m_timers;
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fd_set m_forced_fd;
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TimePoint m_last;
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};
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}
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#endif // event_manager_hh_INCLUDED
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