[Asterisk-Dev] timeval stuff

[Kevin P. Fleming]

Luigi Rizzo wrote:

> compared to the use of pointers, there is an extra copy of 64-bit values,
> however 1) on modern machines that cost is probably negligible,
> and 2) these things are generally associated to more expensive
> computations, such as system calls etc. so i would not worry.

I like this idea (in fact I'm about to pull the ms_diff function out of 
app_alarmreceiver.c and into utils.h so I can use it in some other 
code). However, I think we need to stick with passing struct pointers 
around whenever we can, unless it's really ugly.