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https://issues.apache.org/jira/browse/MYNEWT-879?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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William San Filippo resolved MYNEWT-879.
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Resolution: Fixed
> os_sched_sleep and os_sched_insert could insert into sleep or run list
> incorrectly
> ----------------------------------------------------------------------------------
>
> Key: MYNEWT-879
> URL: https://issues.apache.org/jira/browse/MYNEWT-879
> Project: Mynewt
> Issue Type: Bug
> Security Level: Public(Viewable by anyone)
> Components: OS
> Affects Versions: v1_3_0_rel
> Reporter: William San Filippo
> Assignee: William San Filippo
>
> The queue.h macros TAILQ_INSERT_TAIL will not set the first element in the
> head of the list if the list is empty. This is by design. Unfortunately, the
> OS code does not check in two places when inserting into the sleep list
> (os_sched_sleep) or the run list (os_sched_insert) if the list is empty. The
> code has to specifically check if the list is empty, and if so, call
> TAILQ_INSERT_HEAD (rather than insert tail).
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