Looking over the Jacl's tcl.lang.Shell source code, there are several places
where the ConsoleThread is accessing the tcl.lang.Interp object's method.
For example, the ConsoleThread's run() method makes calls to:
interp.getVar(...);
interp.setVar(...);
interp.updateReturnInfo();
interp.getResult();
interp.eval();
These calls shouldn't be made by the ConsoleThread since the ConsoleThread
is not the event loop thread running the interpreter.
The interesting thing about this code is that it is convenient for a
programmer to call the methods in the tcl.lang.Interp class directly from
any thread without going through the process of queuing up a TclEvent on the
Notifier.
The Notifier class and the Interp class together make it possible to use Tcl
from a multi-threaded Java environment using an event queue model. It may
also be useful to have another class, or extending the existing Notifier
class, to use the Notifier's event queue to provide a function call
interface to the methods in the Interp class.
For example:
tcl.lang.Interp - used by a single thread only
eval(),
setAssocData(),
deleteAssocData(),
setVar(),
getVar(),
etc.
tcl.lang.Notifier - used by multiple threads through "queueEvent()"
queueEvent()
serviceEvent()
etc.
tcl.lang.TclInterp - uses Notifier's event queue to invoke Interp's
methods...
eval(),
setAssocData(),
deleteAssocData(),
setVar(),
getVar(),
etc.
Then, the Jacl ConsoleThread can do something like:
void methodFooBar (Interp interp) {
Notifier notifier = interp.getNotifier();
TclInterp tclInterp = notifier.getTclInterp();
tclInterp.eval(...);
tclInterp.setVar(...);
}
Of course, having this extra class is not absolute necessary. It is only a
convenience.
-- Jiang Wu
[EMAIL PROTECTED]
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