[Vm-dev] Question on Embedding Squeak
John M McIntosh
johnmci at smalltalkconsulting.com
Sat Feb 23 09:28:18 UTC 2008
Well certainly the hydra VM work he should look at.
The browser plugin code at
could be examined too, it was written mostly by Bert Freudenberg with
changes by myself to let you start a netscape plugin os-x safari/
firefox which setups a shared
memory area (non-trival because instructions how to do this are vague)
and two pipes to let the plugin code stuff interact with a headless VM
via execv(plugin->vmName, plugin->argv);
The pipes are used to pass control information between the plugin stub
and the headless VM
The shared memory area is the quartz window canvas, other operating
such as windows and X11 let you deal with remote surface display in an
There is a bunch of nasty semaphore logic to deal with preventing the
VM from burying the browser with update requests, plus code to figure
out if the browser has gone away.
Thus the headless VM is feed UI events and serves back UI images to
On Feb 22, 2008, at 6:55 PM, tim Rowledge wrote:
> Gulik's reply reminds me that you might find the code that allows
> the VM to be a browser plugin instructive. Part of your interest
> will likely be that there is so little needing changing.
> I'll leave it to John McI to explain the details since he's probably
> done most of the code fudging involved.
> tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
> Never write software that patronizes the user.
John M. McIntosh <johnmci at smalltalkconsulting.com>
Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com
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