[gambit-list] Asynchronous callbacks

Francisco fjvallarino at gmail.com
Sun Apr 6 00:18:07 EDT 2014


Thank you for the example! This will definitely allow me to run multiple
threads to separate UI from audio processing.

I will try to dig a bit deeper to understand how the VMs work. One of the
things I need to do is invoking a function on a specific VM (to generate
audio I need to register a C callback that is invoked on a thread that is
not controlled my me). My plan is having a standard VM running the main
program and have another "idle" VM that will only be invoked by the C
callback function. This way I should avoid corruption of the main VM stack.
This idle VM would receive the information it needs from an in process
message queue or a socket. If I can find the way of invoking the function
on the right VM, I think my problem would be solved.

Thank you!


On Sat, Apr 5, 2014 at 12:17 PM, Marc Feeley <feeley at iro.umontreal.ca>wrote:

> On Apr 1, 2014, at 10:06 AM, Francisco <fjvallarino at gmail.com> wrote:
> > I have not found the post you mention. Based on
> https://mercure.iro.umontreal.ca/pipermail/gambit-list/2014-February/007441.html,
> I understood it was a work in progress... If you remember the thread, it
> would be great.
> Here is an example that uses the multiple VM support.  I've tested it on
> OS X only, but it should be portable to other OSes.
> You first have to build Gambit with
>     ./configure --enable-multiple-vms
>     make
> And then
>     cd multiple-vm-example
>     make
> then
>     telnet localhost 12345
> to connect to the VM that is created.
> There are still issues with the multiple VM support, notably the VMs share
> a single console, which means there are race conditions if you try to
> read/write things to the console from different VMs. This is why the
> example code runs one of the VMs on a network connection (which is probably
> what you want to do anyway in practice).
> Marc
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