event.h

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/*
Copyright (c) 2026 MrXie1109
 
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The above copyright notice and this permission notice shall be included in all
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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*/
 
#pragma once
#include <condition_variable>
#include <mutex>
 
#include "../util/time.h"
 
namespace console {
    class Event {
        bool                            flag_;  
        mutable std::mutex              mutex_; 
        mutable std::condition_variable cv_;    
 
    public:
        Event() : flag_(false) {}

        void set() {
            std::unique_lock<std::mutex> lock(mutex_);
            flag_ = true;
            cv_.notify_all();
        }

        void clear() {
            std::unique_lock<std::mutex> lock(mutex_);
            flag_ = false;
        }

        void wait() const {
            std::unique_lock<std::mutex> lock(mutex_);
            cv_.wait(lock, [this]() { return flag_; });
        }

        template <class Rep, class Period>
        bool wait(const std::chrono::duration<Rep, Period> &duration) const {
            std::unique_lock<std::mutex> lock(mutex_);
            return cv_.wait_for(lock, duration, [this]() { return flag_; });
        }

        bool wait(Time timeout) const {
            return wait(std::chrono::nanoseconds(timeout.count()));
        }

        bool wait(double seconds) const {
            return wait(std::chrono::duration<double>(seconds));
        }

        bool is_set() const {
            std::unique_lock<std::mutex> lock(mutex_);
            return flag_;
        }

        Event(const Event &) = delete;
        Event &operator=(const Event &) = delete;
        Event(Event &&other) = delete;
        Event &operator=(Event &&other) = delete;
    };
}