Draft: threads scheduler

[jclab-joseph]

• [X] amd64/linux createThread
• [ ] amd64/windows createThread
• [ ] 386/linux createThread
• [ ] arm/linux createThread
• [ ] arm64/linux createThread
• [ ] arm64/linux createThread
• [ ] testdata
• [ ] Leave possible pause to the OS.

https://github.com/tinygo-org/tinygo/pull/2290 must be merged first.

This is a draft of a threads scheduler implementation as a cornerstone of a multi-core implementation.

I can't do it alone. I would love to work together.

See https://github.com/tinygo-org/tinygo/issues/2446

[dgryski]

In addition to the scheduler, the sync/* packages probably needs to be rewritten to account for concurrency.

[jclab-joseph]

Yes, Need to test it further, but once #2290 is merged, Mutex, Cond, etc. will likely be thread safe.

[aykevl]

Another important piece is the garbage collector. You need to find a way to pause all other threads while the GC is running.