Add "after at" to schedule events for a specific time

[SpaceManiac]

A patch has been submitted upstream:

https://core.tcl.tk/tcl/tktview/2953b1b26b58c887435b74923ccef1712ad4b614

[jima00]

Any chance this could be coordinated with efforts towards http://www.tcl.tk/cgi-bin/tct/tip/302 ?

[eviltwinskippy]

For the interim, there is a pure-tcl module for tcllib to do roughly this task:
http://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/cron/cron.html

[kennykb]

@jima00 - Yes, I would imagine that we'd want to combine this functionality with 302. My only trepidation is that it changes the semantics of [after] for all the programs that are using something like the 'cron' module to get the desired functionality. [at] really does need to be affected by changes in the system clock.

[resuna]

It seems like implementing "after at" and then giving some time for programs currently using "after" to schedule wallclock events to switch to "after at" would be a path to making TIP #302 implementable.

So I think this should be submitted as a new TIP with cross-reference to TIP #302.

[sebres]

I've provided artificial PR sebres/tcl#4, that fully implements this (together with TIP #302 and many, many other things.

If I get a bit time, and TCT does not see absolute no-go for it (because I've several doubts about), I'll make decent rebase to fossil (with commit-history and review).
@flightaware I would like to know your statement also.

[resuna]

That looks really impressive. I’ll have to have a sitdown and look it all over. Hopefully it will be possible to convince the TCT. From: "Serg G. Brester" <notifications@github.com> Reply-To: flightaware/Tcl-bounties <reply@reply.github.com> Date: Thursday, June 29, 2017 at 2:56 PM To: flightaware/Tcl-bounties <Tcl-bounties@noreply.github.com> Cc: Peter da Silva <peter.dasilva@flightaware.com>, Comment <comment@noreply.github.com> Subject: Re: [flightaware/Tcl-bounties] Add "after at" to schedule events for a specific time (#2) I've provided artificial PR sebres/tcl#4<sebres/tcl#4>, that fully implements this (together with TIP #302<www.tcl.tk/cgi-bin/tct/tip/302.html> and many, many other things. If I get a bit time, and TCT does not see absolute no-go for it (because I've several doubts about), I'll make decent rebase to fossil (with commit-history and review). @flightaware<https://github.com/flightaware> I would like to know your statement also. — You are receiving this because you commented. Reply to this email directly, view it on GitHub<#2 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AAF0OoYMRiQVS4gqCZtaNNmFQbLUR5ziks5sJAGDgaJpZM4K2afA>.

[sebres]

I've extended test-cases a bit, and have provided a performance comparison for above-mentioned branch, if interesting sebres/tcl#4 (comment)

[sebres]

Reintegrated resp. back-ported as 8.6 based branch in sebres-8-6-event-perf-branch