tree fa21015b578d974d3f6838e061391f4eda838526
parent 7faecc97f558e21ae632d0e7013c8a99001d38d0
author Ewout van Bekkum <ewout@google.com> 1615480239 -0800
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1615596945 +0000

embos: fix for_at_least contract to add one tick

Fixes the embOS backends for pw::sync::Mutex,
pw::sync::BinarySemaphore, pw::sync::CountingSemaphore, and
pw::this_thread::sleep_for to add one tick when invoking the native
API to comply with the for_at_least contract as we do not know how
far we are into the current tick.

Note this is not observable without the use of an independent clock.

This also adds explicit downcasting from int64_t to OS_TIME ticks
when invoking native APIs.

Change-Id: I113cbdfc1a88795df87223117e65a763ae050772
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/37280
Reviewed-by: Wyatt Hepler <hepler@google.com>
Commit-Queue: Ewout van Bekkum <ewout@google.com>