Solaris/Linux flowchart (critical instant scheme) draw tool

[Emanuel Berg <embe8573@student.uu.se>]

This might be (a bit) OT on comp.lang.ada, but as Ada is
- or should be - the number one real time programming
language, I thought probably you could help me. (Also,
there doesn't seem to be that much traffic on
comp.realtime, though I know there are some good people
there, too.)

Anyway, take a look at this:

http://user.it.uu.se/~embe8573/flowchart.png

Is there a tool to draw such diagrams? (In general, the
details may vary.)

I don't need a tool to compute runtimes, preemptions,
etc., out of raw data, and then draw, no, I'm going to
draw everything manually, only, I thought there might be
a tool to do it.

Otherwise, I thought about buying those big
white-blue-ish sheets that engineers used (and should
use, still, if they have style), and draw them by
hand. Also, I contemplated the idea of drawing them on a
whiteboard, and then shoot it with a camera.

I don't know. Doing it with gimp or even Dia doesn't
seem that attractive.

-- 
Emanuel Berg - programmer (hire me! CV below)
computer projects: http://user.it.uu.se/~embe8573
internet activity: http://home.student.uu.se/embe8573