wait_on_unavailable () when all cores are used and more are requested, wait for cores to be freed instead of crashing.

get_available_cores () returns the number of available cores.

isolate_current () ensures that the current domain (usually the main one) is restricted to run on a core where other isolated domains can't run.

spawn ?isolated f if isolated is true spawns a domain that runs on a given core, otherwise behaves as Domain.spawn.

isolated is true by default.

• raises Failure

  if spawn is called multiple times (or both spawn and spawn_n are called) with different values of isolated.

spawn_n ?isolated ?n f if isolated is true, n is provided and is less than or equal to the number of free physical cores, spawns n new domains. If n is not provided and there is at least one free physical core, spawns as many domains as there are physical cores.

If isolated is false, the spawned domains are not guaranteed to run on separate cores.

isolated is true by default.

• raises Failure

  if there aren't enough free physical cores.

• raises Failure

  if spawn_n is called multiple times (or both spawn and spawn_n are called) with different values of isolated.