File content as of revision 31:22e7fd7b12b3:

#if !defined(LINUXMQTT_H)
#define LINUXMQTT_H

class Countdown
{
public:
    Countdown()
    { 
    
    }

    Countdown(int ms)
    { 
        countdown_ms(ms);
    }
    

    bool expired()
    {
        struct timeval now, res;
        gettimeofday(&now, NULL);
        timersub(&end_time, &now, &res);        
        //printf("left %d ms\n", (res.tv_sec < 0) ? 0 : res.tv_sec * 1000 + res.tv_usec / 1000);
        //if (res.tv_sec > 0 || res.tv_usec > 0)
        //  printf("expired %d %d\n", res.tv_sec, res.tv_usec);
        return res.tv_sec < 0 || (res.tv_sec == 0 && res.tv_usec <= 0);
    }
    

    void countdown_ms(int ms)  
    {
        struct timeval now;
        gettimeofday(&now, NULL);
        struct timeval interval = {ms / 1000, (ms % 1000) * 1000};
        //printf("interval %d %d\n", interval.tv_sec, interval.tv_usec);
        timeradd(&now, &interval, &end_time);
    }

    
    void countdown(int seconds)
    {
        struct timeval now;
        gettimeofday(&now, NULL);
        struct timeval interval = {seconds, 0};
        timeradd(&now, &interval, &end_time);
    }

    
    int left_ms()
    {
        struct timeval now, res;
        gettimeofday(&now, NULL);
        timersub(&end_time, &now, &res);
        //printf("left %d ms\n", (res.tv_sec < 0) ? 0 : res.tv_sec * 1000 + res.tv_usec / 1000);
        return (res.tv_sec < 0) ? 0 : res.tv_sec * 1000 + res.tv_usec / 1000;
    }
    
private:

    struct timeval end_time;
};


#endif