Re: How to swap coroutine ?

[Tony Finch <dot@...>]

Gaspard Bucher <gaspard@teti.ch> wrote:
> On Tue, Sep 13, 2011 at 8:53 AM, Graham Wakefield <wakefield@mat.ucsb.edu>wrote:
>
> > Exactly. Start your script with lua_resume() rather than lua_call().
>
> This is a good idea if you run a custom executable, which I don't (I want to
> use plain Lua).

You can do the equivalent in plain Lua if you have a wrapper script that
loads the user's script and calls coroutine.resume on it.

> Technically, what I want to do doesn't seem impossible (it's some kind
> of resumable goto) and it would enable to completely hide the scheduling
> stuff.

Yes, symmetric coroutines are possible but Lua has asymmetric coroutines.
There is a rationale in this paper:
http://www.inf.puc-rio.br/~roberto/docs/corosblp.pdf

Tony.
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