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* mod_cron: Allow for a small amount of timer driftKim Alvefur2022-01-151-1/+1
| | | | | | | | | If the timer activates a bit early then a task might be just a few seconds short of being allowed to run. This would run such a task rather than wait another hour. The value 0.5% chosen so that a weekly task does not run an entire hour earlier than last time.
* mod_cron: Expose the One Timer via module environmentKim Alvefur2021-12-041-1/+1
| | | | | This makes it easier to reschedule or otherwise manipulate the timer from e.g. the shell, which is handy for debugging.
* mod_cron: Add a 'weekly' job frequencyKim Alvefur2021-12-031-1/+1
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* mod_cron: Initialize timestamp of new tasks to start of periodKim Alvefur2021-12-031-2/+2
| | | | | Makes it more generic so new periods (e.g. weekly etc) can be added easily.
* mod_cron: Follow convention of imports at the topKim Alvefur2021-12-031-1/+2
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* mod_cron: Initialize daily tasks so they run around midnight UTCKim Alvefur2021-12-031-0/+4
| | | | | | Eventually the goal is to have daily tasks run while there is little activity, but that will vary with the server and the usage patterns of its users. This is a start anyway.
* mod_cron: Initial commit of periodic task runnerKim Alvefur2021-11-211-0/+59
A number of modules now have periodic tasks that need to run, e.g. for cleaning out old messages or files. This has highlighted a need for coordinating and optimizing scheduling of such tasks.