I was thinking about similar interface to what is in CtrlCore (or using bazaar/Timer). I decided to drop support for that because in preforked mode there would be no simple way to communicate the commands back to the timer thread. (Or is there some shared memory or other IPC mechanism in U++?).
Well, do we really need to communicate commands back?
I mean, jobs started before prefork can stay in the main process. Each forked process then can start its own timer queue. The only thing impossible then would be killing job created in the main process in forked process or job id that is somehow transfered (via IPC) from another process. But there is a simple solution to that: make it illegal
Related question (issue?): for the task you suggest (deleting obsolete sessions), I would normally use standard cron job. I mean I really do not see advantage of proposed job queue to normal cron job. Is there any?
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