milliseconds.txt

#ifdef _WIN32
#include <chrono>
uint64_t milliseconds(void)
{
  return std::chrono::duration_cast<std::chrono::milliseconds>
    (std::chrono::steady_clock::now().time_since_epoch()).count();
}
#else
#include <sys/time.h>
uint64_t milliseconds(void)
{
  struct timeval tv;
  gettimeofday(&tv, NULL);
  return (((uint64_t)tv.tv_sec * 1000) + ((uint64_t)tv.tv_usec / 1000));
}
#endif