#pragma once 
 
class TCont; 
class TContExecutor; 
 
namespace NCoro { 
    class IScheduleCallback { 
    public: 
        virtual void OnSchedule(TContExecutor&, TCont&) = 0;
        virtual void OnUnschedule(TContExecutor&) = 0;
    };
 
    class IEnterPollerCallback {
    public:
        virtual void OnEnterPoller() = 0;
        virtual void OnExitPoller() = 0;
    }; 
}