Re: calling from C to Lua to C and back to Lua?

[Roberto Ierusalimschy <roberto@...>]

> Calling from C into Lua (using pcall), which in turn calls a C
> function that then calls back into the same Lua (pcall again)?

Yes. This is quite common in Lua. For instance:

  table.sort(t, function (a,b) return a.x < b.x end)

When you run this script, the stand-alone C interpreter calls Lua (to
run the main chunk) that calls C (table.sort) which calls Lua
(the user-provided order function).

-- Roberto