Get a timestamp in C in microseconds?

Question

How do I get a microseconds timestamp in C?

I\'m trying to do:

struct timeval tv;
gettimeofday(&tv,NULL);
return tv.tv_usec;

Bu

Answer 1

You need to add in the seconds, too:

unsigned long time_in_micros = 1000000 * tv.tv_sec + tv.tv_usec;

Note that this will only last for about 2³²/10⁶ =~ 4295 seconds, or roughly 71 minutes though (on a typical 32-bit system).