FYI linked-list with weak values

[Gaspard Bucher <gaspard@...>]

FYI (to whom it may interest).

While rebuilding native thread features on top of coroutines, I fell on the garbage collection problem: now

that my threads are registered in the scheduler (global object), I needed to find a way to not hold too tight

on them or they will keep on running (if there is a loop) even though they are not reachable from user

code. My scheduled threads are stored in a linked list with weak values:

WeakValue = {__mode='v'}

elem = {

  t  = setmetatable({t = thread}, WeakValue),

}

-- linked list does not loose next elem, even if the thread is gc

-- (thus the double table wrapping).

elem.next = elem

Cheers,

                                                               Gaspard