[asterisk-dev] [Code Review] Allow res_calendar to be unloaded

[Terry Wilson]

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https://reviewboard.asterisk.org/r/1657/
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Review request for Asterisk Developers.


Summary
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I have seen res_calendar modules contribute to issues with core stop gracefully in part because res_calendar doesn't really unload or take care of the refresh thread that it spawns. There have been some non-calendar-related improvements that make the crash that was happening go away, but it is still very ugly for the module to not clean up after itself. This patch makes res_calendar unloadable and unloads the dependent calendar modules during its unload. 

The issue is only tangentially related to ASTERISK-16744, but it is what prompted me to go ahead and write the patch. Reloads are still handled through the main res_calendar module.


This addresses bug ASTERISK-16744.
    https://issues.asterisk.org/jira/browse/ASTERISK-16744


Diffs
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  /trunk/res/res_calendar.c 350018 

Diff: https://reviewboard.asterisk.org/r/1657/diff


Testing
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module unload res_calendar.so works, and the calendar tech modules are also unloaded. Loading the res_calendar module then a tech module creates the proper calendar entries from the config.


Thanks,

Terry

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