How do I compare two timestamps in C?

Question

I\'m writing a socket program that maintains FIFO queues for two input sockets. When deciding which queue to service, the program pulls the most recent time-stamp from each

Answer 1

For viewing timevals I just whipped this up. It returns a timeval as a string that you can print or send to a text file:

char *tv2str(struct timeval *intv) {
  static char ans[200];
  snprintf(ans,200,"%u.%u",(unsigned int)intv->tv_sec, \
    (unsigned int) intv->tv_usec);
  return ans;
}

Use like:

printf("nowtv: %s\n",tv2str(&nowtv));

nowtv: 1568407554.646623

Timercmp() didn't seem to work right so I wanted a way to check up on it by actually looking at some values.