[squeak-dev] Re: [Pharo-project] [Vm-dev] Re: Can OSProcess
functionality be implemented using FFI instead of plugin?
kilon.alios at gmail.com
Sun Jan 17 16:55:10 UTC 2016
wow impressive work guys , thats awesome news.
On Sun, Jan 17, 2016 at 6:53 PM Eliot Miranda <eliot.miranda at gmail.com>
> Hi Levente,
> > On Jan 17, 2016, at 7:30 AM, Levente Uzonyi <leves at caesar.elte.hu>
> >> On Sat, 16 Jan 2016, Eliot Miranda wrote:
> >> On Sat, Jan 16, 2016 at 4:37 PM, Levente Uzonyi <leves at caesar.elte.hu>
> >> On Sat, 16 Jan 2016, Mariano Martinez Peck wrote:
> >> (Still no quote.)
> >> How will you read the output of the process without having your
> image's process blocked in the FFI callout?
> >> How will you make sure that writes to input of the process won't
> block the FFI callout?
> >> This presupposes the threaded FFI. The threaded FFI allows the VM to
> make any number of blocking calls, adding a new thread to run the VM
> whenever the VM is stalled when the heartbeat beats. hence one can freely
> read and write to/from i/o blocking i/o streams
> >> (including pipes and sockets) or blocking database connexions, etc, all
> without stating that the FFI call must be done in a special way, since all
> calls through the FFI can block without blocking the VM.
> > I think it was you who said (in a discussion with Craig) that the
> threaded FFI was not production ready. Is it ready for produciton now?
> No, but I expect this is the year it will be. Spur provides pinning, so
> the VM infrastructure is there. The Pharo community plus some commercial
> relationships that have developed are providing funding. Esteban Lorenzano
> and I want to collaborate on this and I hope to get help from some other
> people, such as Ronie Salgado. And Mariano is working on an important part
> of the problem. So I feel there's sufficient momentum for us to realize
> the threaded FFI this year.
> > Levente
> _,,,^..^,,,_ (phone)
> >> Note that the scheme is also amenable to plugins, but the plugins must
> be rewritten to include the release vm/acquire vm calls around a blocking
> call. With the threaded VM the FFI includes these calls around every FFI
> >> HTH
> >> _,,,^..^,,,_
> >> best, Eliot
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