fix: do not mix an epoch offset into the FreeRTOS monotonic clock #74

Merged

tbaumgartl merged 2 commits from baumgartl/fix-freertos-monotonic-clock into main

2026-09-25 14:24:15 +02:00

Author	SHA1	Message	Date
Tobias Baumgartl	0220c0aeea	fix comment	2026-09-25 14:21:22 +02:00
Tobias BaumgartlandClaude Opus 5	f0e7e8b523	fix: do not mix an epoch offset into the FreeRTOS monotonic clock getClockMonotonic added monotonicClockOffset on top of the uptime. That offset is indeterminate until the first setClock call and jumps when it is latched, so every Countdown and Stopwatch armed before that point either expires immediately or measures against garbage. The monotonicity came from the uptime alone, the offset only made the value look epoch based. The Linux and host implementations return CLOCK_MONOTONIC_RAW with no offset, so this also makes the OSALs agree. All users take differences only: Countdown, Stopwatch and PeriodicHelper. Also drops the Clock statics monotonicClockInitialized and monotonicClockOffset, which were declared but never defined or used. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-24 22:48:16 +02:00

Author

SHA1

Message

Date

Tobias Baumgartl

0220c0aeea

fix comment

2026-09-25 14:21:22 +02:00

Tobias BaumgartlandClaude Opus 5

f0e7e8b523

fix: do not mix an epoch offset into the FreeRTOS monotonic clock

getClockMonotonic added monotonicClockOffset on top of the uptime. That
offset is indeterminate until the first setClock call and jumps when it is
latched, so every Countdown and Stopwatch armed before that point either
expires immediately or measures against garbage.

The monotonicity came from the uptime alone, the offset only made the value
look epoch based. The Linux and host implementations return
CLOCK_MONOTONIC_RAW with no offset, so this also makes the OSALs agree.

All users take differences only: Countdown, Stopwatch and PeriodicHelper.

Also drops the Clock statics monotonicClockInitialized and
monotonicClockOffset, which were declared but never defined or used.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

2026-09-24 22:48:16 +02:00