>> + 	if ((lasttime->tv_sec == 0 && lasttime->tv_usec == 0) ||
>> + 	    delta.tv_sec > 0) {
>> + 		*lasttime = mono_time;
>> + 		*curpps = 0;
>> + 		rv = 1;
>> + 	} else if (*curpps < maxpps)
>> + 		rv = 1;
>> + 	else
>> + 		rv = 0;
>> + 	/* be careful about wrap-around */
>> + 	if (*curpps + 1 > *curpps)
>> + 		*curpps = *curpps + 1;
>If it reached to the limit, we don't need to increment it, do we?

	I do intend to increment it, someone can use the counter variable
	for statistics purposes.

>> 	you may have different idea about function names or argument types,
>> 	i'm not good at naming things:-)
>psratecheck (per second rate check)?  I'll strongly agree with you
>that at least the acronym pps isn't generic enough.

	while i agree pps is not a generic name, "ps" looks like "process"...
	:-P

itojun