This began as a fork of os.h (https://github.com/adamheinrich/os.h) that works on ATSAMD21 based Arduino devices and has evolved considerably, pulling in functionality from CMSIS RTOS and a few other places.
This now works great on Cortex-M4 devices, like the ATSAMD51.
This software is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this source code. If not, see http://www.gnu.org/licenses/.