time_cache.h

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#pragma once
#ifndef SYDEVS_TIME_CACHE_H_
#define SYDEVS_TIME_CACHE_H_

#include <sydevs/time/time_queue.h>

namespace sydevs {


class time_cache
{
public:
    time_cache();                               
    explicit time_cache(duration dt0);          
    explicit time_cache(const time_point& t0);  

    time_cache(const time_cache&)            = default;  
    time_cache& operator=(const time_cache&) = default;  
    time_cache(time_cache&&)                 = default;  
    time_cache& operator=(time_cache&&)      = default;  
    ~time_cache()                            = default;  

    bool empty() const;  
    int64 size() const;  

    const time_point& current_time() const;  

    const time_point& advance_time(duration dt);          
    const time_point& advance_time(const time_point& t);  

    duration duration_since(int64 event_id) const;  

    void retain_event(int64 event_id, scale precision);  
    bool release_event(int64 event_id);                  

    const time_queue::event_id_set& event_ids() const;  

private:
    time_queue tq_;
    time_queue::event_id_set event_ids_;
};


inline bool time_cache::empty() const
{
    return event_ids_.empty();
}


inline int64 time_cache::size() const
{
    return event_ids_.size();
}


inline const time_point& time_cache::current_time() const
{
    return tq_.current_time();
}


inline const time_queue::event_id_set& time_cache::event_ids() const
{
    return event_ids_;
}


}  // namespace

#endif