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Postings from March 2010
From: Jeff Hobbs
March 19, 2010 18:04
Message ID: 4BA41EDE.firstname.lastname@example.org
On 19/03/2010 5:09 PM, Eric Windisch wrote:
> I feel it would be particularly useful to be able to create slave
> interpreters from Perl. This patch includes this capability and allows
> sandbox (MakeSafe) execution of Tcl code.
Patch seems to have been stripped, but can be found at
> Usage as follows:
> use Tcl;
> my $interp=Tcl::new();
> # Arbitrary name and a boolean 'safe' argument
> my $safeslave=$interp->CreateSlave('name',1);
> open (my $fh, 'script.tcl');
> Speaking to Jeff, he argued perhaps changing the name of the method and
> accepting a hash argument:
> <tclguy> my $interp = new Tcl;
> <tclguy> my $safeslave = $interp->interp_create(-safe => 1);
My thought is that Tcl exposes the same functionality at the Tcl level.
Extending the C API should be kept to a minimum. However, after talking
to Jan it looks like you can't really bless the Tcl returned value in
Perl because it needs the C pointer to the structure. Thus the
CreateSlave might be the best way to go.
Strictly speaking, in the patch you wouldn't need to register the slave
in hvInterps because that is used to track destruction, and master
interps will tear down their slave interps in an orderly fashion when a
proper finalization occurs.