RFC: Proper Mutexes

This MR is the first step towards tackling the locking issues which are plaguing the firmware right now. Commit 82fe0cd7 introduces a new mutex API and the rest of the commits port a few select mutex-uses to it. Those are:

• Lifecycle/Core 1 mutex
• Sensor streams
• API dispatcher lock
• FAT filesystem

The rationale behind the new mutex design is detailed in the docs added as part of this MR: mutex.rst. The API can be found in mutex.h.

Cc: @schneider

added 3-Epicardium 6 - Needs Review labels

Looks good to me! Thanks for keeping our codebase clean.

However, I'm only a bot - so a human will still have to approve this request.

added 16 commits

• e21e1105...62c4ddcf - 11 commits from branch master
• 896cedea - feat(epicardium): Add a proper mutex implementation
• ee137087 - chore(lifecycle): Port to new mutex API
• f33fec0e - chore(sensor-streams): Port to new mutex API
• f7abc259 - chore(api-lock): Port to new mutex API
• cb86e6f5 - chore(fatfs): Port to new mutex API

Compare with previous version

The semaphores in max30001.c, bhi.c and hw-lock.c have not been converted. Reason?

added 12 commits

• cb86e6f5...c7e40e27 - 7 commits from branch master
• 562255b8 - feat(epicardium): Add a proper mutex implementation
• a6f9606d - chore(lifecycle): Port to new mutex API
• 1ca26b6c - chore(sensor-streams): Port to new mutex API
• ff7d8eb2 - chore(api-lock): Port to new mutex API
• e788238f - chore(fatfs): Port to new mutex API

Compare with previous version

added 5 commits

• 9a5a46cd - feat(epicardium): Add a proper mutex implementation
• cc5f0e29 - chore(lifecycle): Port to new mutex API
• 44ea81f2 - chore(sensor-streams): Port to new mutex API
• 75278836 - chore(api-lock): Port to new mutex API
• 86c7418a - chore(fatfs): Port to new mutex API

Compare with previous version

Pushed an update, these are the changes against the previous version.

resolved all threads

unmarked as a Work In Progress

merged

mentioned in commit a4fefd7e