[PD] firm delay scheduling

[Jean-Marie Adrien]

Hello
I'm trying to launch security procedures in case of trouble, that will respond in less than 250 msec.
The fundamental question is :

Is there an object to schedule an event in the future with firm absolute delay ? 

{realtime} measures time AFTER the problem (no scheduling)
{del} schedules things but the delay is kind of elastic, depending on the CPU load.

thanks
JM