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Mikael Djurfeldt 1999-08-29 03:29:03 +00:00
parent a9571599e7
commit c5b738b500
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13
TODO
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@ -39,3 +39,16 @@ Low-level things
* Use the SCM trick of tagging environments with immediates (see m_letrec1)
to convert source correctly in unmemocopy.
Optimizations
* Eliminate argument checking for closures. One way to do it is to
set the cdr of application forms to an immediate representing the
arity of the call. If the closure contains a corresponding
immediate, these can be matched against eachother.
* Implement a thread-safe alternative to SCM's environment caches:
Add an extra argument to SCM_CEVAL: "evaluation context".
Evaluation contexts contain a stack of locations.

34
libguile/ChangeLog
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@ -1,3 +1,37 @@
1999-08-29 Mikael Djurfeldt <mdj@thalamus.nada.kth.se>
Cleanup and simplification of generic method dispatch.
Also, the quadruple representation of entity and operator
procedures has been replaced with single.
* tags.h (SCM_IM_HASH_DISPATCH): Removed.
* print.c (scm_isymnames): Removed #@hash-dispatch.
* objects.c, objects.h (scm_mcache_lookup_cmethod): Moved here
from eval.c; Support 0 arity methods.
(scm_set_object_procedure_x): Removed scm_sym_atdispatch;
(scm_apply_generic_env): Removed.
Replaced slots proc0-3 with procedure.
* objects.h (SCM_OPERATOR_PROC_0, SCM_OPERATOR_PROC_1,
SCM_OPERATOR_PROC_2, SCM_OPERATOR_PROC_3): Replaced by
SCM_OPERATOR_PROCEDURE.
(SCM_ENTITY_PROC_0, SCM_ENTITY_PROC_1, SCM_ENTITY_PROC_2,
SCM_ENTITY_PROC_3): Replaced by SCM_ENTITY_PROCEDURE.
* struct.c, struct.h: Replace 4 procedure slots with one.
(scm_struct_i_procedure): Replaces scm_struct_i_procedure.
* gc.c (scm_gc_mark): Mark 1 procedure slot in entities instead of
4.
* eval.c (scm_sym_args): Removed.
(SCM_CEVAL): Simplified entity application.
Moved dispatch code to objects.c.
* procprop.c (scm_i_procedure_arity): Bugfix: Handle generics.
1999-08-29 Mikael Djurfeldt <mdj@thalamus.nada.kth.se>
* sort.c (closureless): Use scm_eval_body.