Help me to understand the POSIX timers

[george anzinger]

I am looking at glibc-2.2.5 sources and trying to understand what POSIX
timers do for the thread and process timers.  I get lost when I try to
find the thread that is used to actually set up the timer.

General pointers to what is going on here would be of great help.

I am trying to figure out how to integrate the high-res-timers (see
signature) stuff into glibc without loosing functionality.  The standard
says that these timers should time execution time, and I need to
understand how they do that.
-- 
George           george@mvista.com
High-res-timers: http://sourceforge.net/projects/high-res-timers/
Real time sched: http://sourceforge.net/projects/rtsched/