[riot-notifications] [RIOT-OS/RIOT] sys/tsrb: bug fix for tsrb_get_one() (#11624)

korotkoves notifications at github.com
Tue Jun 4 11:42:38 CEST 2019


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### Contribution description

Fixes bug for getting 0xFF byte from ring buffer.
When we want to get such byte as char (signed type), it returns -1 (means buffer is empty).

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### Testing procedure

Put 0xFF byte to buffer and try to get it with tsrb_get_one()

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You can view, comment on, or merge this pull request online at:

  https://github.com/RIOT-OS/RIOT/pull/11624

-- Commit Summary --

  * tsrb: bug fix for tsrb_get_one()

-- File Changes --

    M sys/tsrb/tsrb.c (2)

-- Patch Links --

https://github.com/RIOT-OS/RIOT/pull/11624.patch
https://github.com/RIOT-OS/RIOT/pull/11624.diff

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