thread-safe sleep using select

[almo6914]

I need to do the following for a C++ assessment I'm taking. I've never used the select function before and can't find much on it. The question is:

Write a thread-safe implementation of sleep without using nanosleep. Make use of select in your implementation.

an example I found is:
int usleep(long usec)
{
struct timeval tv;
tv.tv_sec = usec/1000000L;
tv.tv_usec = usec%1000000L;
return select(0, 0, 0, 0, &tv);
}

Will that work, or do I need something else?

[kbw]

You probably need to provide a valid fd. You have stdin, stdout, stderr. You can make them block my waiting for output from stdin or input from stdout or stderr.

BTW, usleep returns 0 on success.