I'm trying to get the time difference between two time stamps. Thread is sleeping between the two time stamps. but when i get the difference, it doesn't give me the time which the thread was sleeping. My code is below.
#include <iostream>
#include <locale>
#include <sys/time.h>
#include <cstdlib>
#include <unistd.h>
using namespace std;
int timeInMilli();
int main()
{
timeval t;
timeval t2;
gettimeofday(&t, NULL);
gettimeofday(&t2, NULL);
std::string buf(20, '\0');
std::strftime(&buf[0], buf.size(), "%H:%M:%S:", localtime(&t.tv_sec));
std::string hr = buf.substr(0, 2);
std::string min = buf.substr(3, 2);
std::string sec = buf.substr(6, 2);
/*std::cout << hr << '\n';
std::cout << min << '\n';
std::cout << std::atoi(sec.c_str()) << '\n';*/
int a = timeInMilli();
usleep(10);
int b = timeInMilli();
cout << b-a << endl;
}
int timeInMilli()
{
timeval t;
gettimeofday(&t, NULL);
string buf(20, '\0');
strftime(&buf[0], buf.size(), "%H:%M:%S:", localtime(&t.tv_sec));
string str_hr = buf.substr(0, 2);
string str_min = buf.substr(3, 2);
string str_sec = buf.substr(6, 2);
int hr = atoi(str_hr.c_str());
int min = atoi(str_min.c_str());
int sec = atoi(str_sec.c_str());
int milli = t.tv_usec/1000;
/*cout << hr << endl;
cout << min << endl;
cout << sec << endl;
cout << milli << endl;*/
int timeInMilli = (((hr * 60) + min) * 60 + sec) * 1000 + milli;
return timeInMilli;
}