I have implemented callbacks for SqueakAPI calls under Squeak1.3x but calling the interpret does not work anytime. And the Jitter version does not work with the interpret loop.
Ale. ---------- De: Stephen Pair[SMTP:spair@advantive.com] Enviado: Jueves 29 de Abril de 1999 14:20 Para: squeak@cs.uiuc.edu Asunto: RE: Calling methods from primitives
What if you altered the instruction pointer (IP) and stack pointer (SP; to push any parameters) and then called interpret? Would that work? Also, would the debugger be able to handle having the primitive context on the stack?
It seems to me if that would work, it should then be trivial to implement a macro for doing message sends from the VM (or pluggable prims).
- Stephen
-----Original Message----- From: stp@silcom.com [mailto:stp@silcom.com]On Behalf Of Stephen Pope Sent: Thursday, April 29, 1999 12:08 PM To: squeak@cs.uiuc.edu Subject: Re: Calling methods from primitives
Stephen Pair wrote:
Does anyone how to invoke a method on an object from within a
primitive? Is
there a way?
There's no direct and simple way to handle arbitrary "call-backs" from the VM into Smalltalk. I do it via Semaphores. You can easily register a semaphore as an external object, then signal it from a primitive. If you have a Smalltalk process waiting on the semaphore, it can do whatever it wants -- send a message, call another primitive, etc.
-- stp
Stephen Travis Pope stp@create.ucsb.edu http://www.create.ucsb.edu/~stp/