help2002

It's UWAweek 30 (2nd semester, week 1)

help2002

This forum is provided to promote discussion amongst students enrolled in CITS2002 Systems Programming.
Please consider offering answers and suggestions to help other students! And if you fix a problem by following a suggestion here, it would be great if other interested students could see a short "Great, fixed it!" followup message.

Displaying selected article

Showing 1 of 1168 articles.
Currently 17 other people reading this forum.

UWA week 36 (2nd semester, mid-semester break) ↓

Wait Sys call (all 4)

5:22pm Thu 7th Sep, Christopher M.

ANONYMOUS wrote:

> What is it actually waiting for? This is a valid file according to the sample solution.

A process calling wait will be blocked until all of its child processes (that it has spawned) have terminated. The project sheet says: "waits for all processes that it has spawned to terminate (at which time the process is marked as Blocked until the other processes terminate)."

> And am I correct in saying that if wait is called with nothing to actually wait for then it just goes back to the READY queue?

The Clarifications page says: "If a process calls the 'wait' system-call when it has no children, it should be moved from the CPU to the READY queue (not to the WAITING queue)." If either of these points are unclear, please explain which part you're confused about.