Watchdog for Lua

["Todor Totev" <umbra.tenebris@...>]

Hello all,
I want to limit the scripts to execute only for a specified period of time.
I.e. if the script executes for more than a second, lua should terminate it
and return from loadstring() call.
Is it possible? Where I should look in the code to made it?
Thank you in advance,
Todor