Re: coroutines local userdata and GC

[Andrew Starks <andrew.starks@...>]

On Tue, Nov 18, 2014 at 6:04 PM, arioch82 <arioch82@gmail.com> wrote:

if that's the case and i create and run multiple coroutines on the same
non-anonymous function how would all variables local to the function behave?
they would all resume each other and share the same data?
that would also mean that all locally created userdata/tables will never be
free since there will always be a variable in the module pointing to that
function



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The function is a single reference, but when it runs, its arguments and locals are executed in its own space.

The upvalues of this function are shared. And so:

```

local a = 1

my_func = function (b)

  b = tonumber(b) or 1

  local c = 1

  for i = 1, 10 do

    a = a + 1

    b = b + 1

    c = c + 1

    print('a', a, 'b', b, 'c', c)

    coroutine.yield()

  end

end

---make a bunch of coroutines with my_func as the main

---resume them. you'll see that each coroutine will cause the single `a` variable to increment

---but `b` and `c` are all independent.

```

-Andrew