bctimer.C

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#include "bctimer.h"
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>

Timer::Timer()
{
}

Timer::~Timer()
{
}

int Timer::update()
{
        gettimeofday(&current_time, 0);
        return 0;
}

int64_t Timer::get_difference(struct timeval *result)
{
        gettimeofday(&new_time, 0);
        
        result->tv_usec = new_time.tv_usec - current_time.tv_usec;
        result->tv_sec = new_time.tv_sec - current_time.tv_sec;
        if(result->tv_usec < 0) 
        {
                result->tv_usec += 1000000; 
                result->tv_sec--; 
        }
        
        return (int64_t)result->tv_sec * 1000 + (int64_t)result->tv_usec / 1000;
}

int64_t Timer::get_difference()
{
        gettimeofday(&new_time, 0);

        new_time.tv_usec -= current_time.tv_usec;
        new_time.tv_sec -= current_time.tv_sec;
        if(new_time.tv_usec < 0)
        {
                new_time.tv_usec += 1000000;
                new_time.tv_sec--;
        }

        return (int64_t)new_time.tv_sec * 1000 + 
                (int64_t)new_time.tv_usec / 1000;
}

int64_t Timer::get_scaled_difference(long denominator)
{
        get_difference(&new_time);
        return (int64_t)new_time.tv_sec * denominator + 
                (int64_t)((double)new_time.tv_usec / 1000000 * denominator);
}

int Timer::delay(long milliseconds)
{
        struct timeval delay_duration;
        delay_duration.tv_sec = 0;
        delay_duration.tv_usec = milliseconds * 1000;
        select(0,  NULL,  NULL, NULL, &delay_duration);
        return 0;
}

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