nanosecond Measurement in arduino using clock_gettime

Question

I making a Localization project Using Arduino and Xbee Zg where i need to measure time in nano second resolution im using arduino due board with 84 Mhz clock and arduino 1.5.2 IDE

im trying to use clock_gettime function i already included time.h but i get the same compiling error clock_gettime is not declared in this scope

this is just a part of my Distance_Measurement.c file

#include "Distance_Measurement.h"
#include "time.h"
struct timespec start, stop;

bool Start_Time()
{
 if(clock_gettime(CLOCK_REALTIME,&start) == -1)
    return false;
 else 
    return true;
}

bool Stop_Time()
{
  if(clock_gettime(CLOCK_REALTIME,&stop) == -1)
    return false;
  else 
    return true;
}

double Cal_Time_Nano()
{ 
    return (stop_time.tv_nsec - start_time.tv_nsec);
}

please help me

Answer 1

i first used #include i got the same error i have found that visual studio have included anther time.h not time.h in arduino gcc so i copied the last one and pasted it to arduino libraries path with my distance measurement library – PrinceOfEgy