Migrate from libsnooze

[deavmi]

Purpose

No longer want to use libsnooze. A condition variable with a mutex is safer with futex etc. Libsnooze had an FD and yeah, stuff could go wrong if a use closed those.

Todo ✍️

• Future
  • What to do on SyncError?
  • Migrate
  • Fix issue
    • One issue is that a task completes too quickly, before anyone calls condvar.wait() and it therefore never wakes up. We must investigate this, perhaps we should wait(Duration) (with a low one, if it is set then exit, else the full blocking wait)
    • ☝️ Above will not work, between the time of full wait and after timedout wait and past another State check it could be set.
    • Solution: While loop with timeout
    • Better solution: Signal queue, meaning on addition wake up but also prior to wait we can immediately see a result there
  • Slumber interval
    • Configurable
    • Sane default
• Sequential
  • What to do on SyncError?
  • Migrate
  • Slumber interval
    • Configurable
    • Sane default