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generics now dispatch as applicable structs

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* libguile/eval.i.c (CEVAL, SCM_APPLY): Dispatch applicable structs
  before pure generics. In practice what this means is that we never hit
  the mcache case, because all pure generics are applicable structs.
  We're moving over to having generics dispatch themselves. Also, they
  don't prepend the struct as an arg; in order to have that effect, the
  user has closures.

* libguile/goops.c (scm_apply_generic, scm_call_generic_0):
  (scm_call_generic_1, scm_call_generic_2, scm_call_generic_3): Dispatch
  directly to the struct procedures.
  (scm_var_make_extended_generic): Remove a duplicate definition for
  scm_var_make_extended_generic.
  (create_standard_classes): Mark all instances of
  <applicable-struct-class> (themselves classes) as applicable classes.
  Meaning: generics are now applicable structs.

* libguile/goops.h (SCM_CLASS_CLASS_LAYOUT): The hashsets are actually
  uw slots -- or at least, making subclasses maps the int slots to be uw
  slots

* libguile/vm-i-system.c (call, goto/args, mv-call): Dispatch applicable
  structs in the VM.

* module/oop/goops/dispatch.scm (emit-linear-dispatch): Fix bug in the
  non-rest cache miss case.
  (delayed-compile): Rework to avoid fluids.
  (cache-dispatch): Don't call `equal?', it causes bootstrapping
  problems with the primitive-generic equal?. Using our own version is
  faster anyway.
This commit is contained in:
Andy Wingo 2009-11-20 13:11:52 +01:00
parent 9f63ce021c
commit 2f652c6884
5 changed files with 107 additions and 112 deletions
Download patch file Download diff file Expand all files Collapse all files

115
libguile/eval.i.c
View file

@ -1026,22 +1026,20 @@ dispatch:
goto nontoplevel_begin;
}
case scm_tcs_struct:
if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC)
if (SCM_STRUCT_APPLICABLE_P (proc))
{
proc = SCM_STRUCT_PROCEDURE (proc);
#ifdef DEVAL
debug.info->a.proc = proc;
#endif
goto evap0;
}
else if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC)
{
x = SCM_GENERIC_METHOD_CACHE (proc);
arg1 = SCM_EOL;
goto type_dispatch;
}
else if (SCM_STRUCT_APPLICABLE_P (proc))
{
arg1 = proc;
proc = SCM_STRUCT_PROCEDURE (proc);
#ifdef DEVAL
debug.info->a.proc = proc;
debug.info->a.args = scm_list_1 (arg1);
#endif
goto evap1;
}
else
goto badfun;
case scm_tc7_subr_1:
@ -1153,7 +1151,15 @@ dispatch:
goto nontoplevel_begin;
}
case scm_tcs_struct:
if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC)
if (SCM_STRUCT_APPLICABLE_P (proc))
{
proc = SCM_STRUCT_PROCEDURE (proc);
#ifdef DEVAL
debug.info->a.proc = proc;
#endif
goto evap1;
}
else if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC)
{
x = SCM_GENERIC_METHOD_CACHE (proc);
#ifdef DEVAL
@ -1163,17 +1169,6 @@ dispatch:
#endif
goto type_dispatch;
}
else if (SCM_STRUCT_APPLICABLE_P (proc))
{
arg2 = arg1;
arg1 = proc;
proc = SCM_STRUCT_PROCEDURE (proc);
#ifdef DEVAL
debug.info->a.args = scm_cons (arg1, debug.info->a.args);
debug.info->a.proc = proc;
#endif
goto evap2;
}
else
goto badfun;
case scm_tc7_subr_2:
@ -1232,7 +1227,24 @@ dispatch:
RETURN (scm_i_gsubr_apply (proc, arg1, arg2, SCM_UNDEFINED));
#endif
case scm_tcs_struct:
if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC)
if (SCM_STRUCT_APPLICABLE_P (proc))
{
operatorn:
#ifdef DEVAL
RETURN (SCM_APPLY (SCM_STRUCT_PROCEDURE (proc),
debug.info->a.args,
SCM_EOL));
#else
RETURN (SCM_APPLY (SCM_STRUCT_PROCEDURE (proc),
scm_cons (arg1,
scm_cons (arg2,
scm_ceval_args (x,
env,
proc))),
SCM_EOL));
#endif
}
else if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC)
{
x = SCM_GENERIC_METHOD_CACHE (proc);
#ifdef DEVAL
@ -1242,23 +1254,6 @@ dispatch:
#endif
goto type_dispatch;
}
else if (SCM_STRUCT_APPLICABLE_P (proc))
{
operatorn:
#ifdef DEVAL
RETURN (SCM_APPLY (SCM_STRUCT_PROCEDURE (proc),
scm_cons (proc, debug.info->a.args),
SCM_EOL));
#else
RETURN (SCM_APPLY (SCM_STRUCT_PROCEDURE (proc),
scm_cons2 (proc, arg1,
scm_cons (arg2,
scm_ceval_args (x,
env,
proc))),
SCM_EOL));
#endif
}
else
goto badfun;
case scm_tc7_subr_0:
@ -1458,7 +1453,9 @@ dispatch:
}
#endif /* DEVAL */
case scm_tcs_struct:
if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC)
if (SCM_STRUCT_APPLICABLE_P (proc))
goto operatorn;
else if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC)
{
#ifdef DEVAL
arg1 = debug.info->a.args;
@ -1468,8 +1465,6 @@ dispatch:
x = SCM_GENERIC_METHOD_CACHE (proc);
goto type_dispatch;
}
else if (SCM_STRUCT_APPLICABLE_P (proc))
goto operatorn;
else
goto badfun;
case scm_tc7_subr_2:
@ -1764,7 +1759,18 @@ tail:
#endif
goto tail;
case scm_tcs_struct:
if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC)
if (SCM_STRUCT_APPLICABLE_P (proc))
{
proc = SCM_STRUCT_PROCEDURE (proc);
#ifdef DEVAL
debug.vect[0].a.proc = proc;
#endif
if (SCM_NIMP (proc))
goto tail;
else
goto badproc;
}
else if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC)
{
#ifdef DEVAL
args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args);
@ -1773,25 +1779,6 @@ tail:
#endif
RETURN (scm_apply_generic (proc, args));
}
else if (SCM_STRUCT_APPLICABLE_P (proc))
{
/* operator */
#ifdef DEVAL
args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args);
#else
args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args));
#endif
arg1 = proc;
proc = SCM_STRUCT_PROCEDURE (proc);
#ifdef DEVAL
debug.vect[0].a.proc = proc;
debug.vect[0].a.args = scm_cons (arg1, args);
#endif
if (SCM_NIMP (proc))
goto tail;
else
goto badproc;
}
else
goto badproc;
default:

24
libguile/goops.c
View file

@ -1800,40 +1800,31 @@ scm_mcache_compute_cmethod (SCM cache, SCM args)
SCM
scm_apply_generic (SCM gf, SCM args)
{
SCM cmethod = scm_mcache_compute_cmethod (SCM_GENERIC_METHOD_CACHE (gf), args);
if (SCM_PROGRAM_P (cmethod))
return scm_vm_apply (scm_the_vm (), cmethod, args);
else if (scm_is_pair (cmethod))
return scm_eval_body (SCM_CDR (SCM_CMETHOD_CODE (cmethod)),
SCM_EXTEND_ENV (SCM_CAR (SCM_CMETHOD_CODE (cmethod)),
args,
SCM_CMETHOD_ENV (cmethod)));
else
return scm_apply (cmethod, args, SCM_EOL);
return scm_apply (SCM_STRUCT_PROCEDURE (gf), args, SCM_EOL);
}
SCM
scm_call_generic_0 (SCM gf)
{
return scm_apply_generic (gf, SCM_EOL);
return scm_call_0 (SCM_STRUCT_PROCEDURE (gf));
}
SCM
scm_call_generic_1 (SCM gf, SCM a1)
{
return scm_apply_generic (gf, scm_list_1 (a1));
return scm_call_1 (SCM_STRUCT_PROCEDURE (gf), a1);
}
SCM
scm_call_generic_2 (SCM gf, SCM a1, SCM a2)
{
return scm_apply_generic (gf, scm_list_2 (a1, a2));
return scm_call_2 (SCM_STRUCT_PROCEDURE (gf), a1, a2);
}
SCM
scm_call_generic_3 (SCM gf, SCM a1, SCM a2, SCM a3)
{
return scm_apply_generic (gf, scm_list_3 (a1, a2, a3));
return scm_call_3 (SCM_STRUCT_PROCEDURE (gf), a1, a2, a3);
}
SCM
@ -1956,8 +1947,6 @@ static const char extension_gc_hint[] = "GOOPS extension";
static t_extension *extensions = 0;
SCM_VARIABLE (scm_var_make_extended_generic, "make-extended-generic");
void
scm_c_extend_primitive_generic (SCM extended, SCM extension)
{
@ -2554,8 +2543,7 @@ create_standard_classes (void)
scm_class_class, scm_class_class, SCM_EOL);
make_stdcls (&scm_class_applicable_struct_class, "<applicable-struct-class>",
scm_class_class, scm_class_procedure_class, SCM_EOL);
/* SCM_SET_VTABLE_FLAGS (scm_class_applicable_struct_class,
SCM_VTABLE_FLAG_APPLICABLE_VTABLE); */
SCM_SET_VTABLE_FLAGS (scm_class_applicable_struct_class, SCM_VTABLE_FLAG_APPLICABLE_VTABLE);
make_stdcls (&scm_class_method, "<method>",
scm_class_class, scm_class_object, method_slots);
make_stdcls (&scm_class_accessor_method, "<accessor-method>",

16
libguile/goops.h
View file

@ -63,14 +63,14 @@
/* see also, SCM_VTABLE_BASE_LAYOUT, and build_class_class_slots */
#define SCM_CLASS_CLASS_LAYOUT \
"pw" /* redefined */ \
"ur" /* h0 */ \
"ur" /* h1 */ \
"ur" /* h2 */ \
"ur" /* h3 */ \
"ur" /* h4 */ \
"ur" /* h5 */ \
"ur" /* h6 */ \
"ur" /* h7 */ \
"uw" /* h0 */ \
"uw" /* h1 */ \
"uw" /* h2 */ \
"uw" /* h3 */ \
"uw" /* h4 */ \
"uw" /* h5 */ \
"uw" /* h6 */ \
"uw" /* h7 */ \
"pw" /* direct supers */ \
"pw" /* direct slots */ \
"pw" /* direct subclasses */ \

15
libguile/vm-i-system.c
View file

@ -761,6 +761,11 @@ VM_DEFINE_INSTRUCTION (53, call, "call", 1, -1, 1)
APPLY_HOOK ();
NEXT;
}
if (SCM_STRUCTP (x) && SCM_STRUCT_APPLICABLE_P (x))
{
sp[-nargs] = SCM_STRUCT_PROCEDURE (x);
goto vm_call;
}
if (SCM_STRUCTP (x) && SCM_OBJ_CLASS_FLAGS (x) & SCM_CLASSF_PURE_GENERIC)
{
SCM args = SCM_EOL;
@ -845,6 +850,11 @@ VM_DEFINE_INSTRUCTION (54, goto_args, "goto/args", 1, -1, 1)
APPLY_HOOK ();
NEXT;
}
if (SCM_STRUCTP (x) && SCM_STRUCT_APPLICABLE_P (x))
{
sp[-nargs] = SCM_STRUCT_PROCEDURE (x);
goto vm_goto_args;
}
if (SCM_STRUCTP (x) && SCM_OBJ_CLASS_FLAGS (x) & SCM_CLASSF_PURE_GENERIC)
{
SCM args = SCM_EOL;
@ -937,6 +947,11 @@ VM_DEFINE_INSTRUCTION (57, mv_call, "mv-call", 4, -1, 1)
APPLY_HOOK ();
NEXT;
}
if (SCM_STRUCTP (x) && SCM_STRUCT_APPLICABLE_P (x))
{
sp[-nargs] = SCM_STRUCT_PROCEDURE (x);
goto vm_mv_call;
}
if (SCM_STRUCTP (x) && SCM_OBJ_CLASS_FLAGS (x) & SCM_CLASSF_PURE_GENERIC)
{
SCM args = SCM_EOL;

33
module/oop/goops/dispatch.scm
View file

@ -72,7 +72,9 @@
(let lp ((methods methods)
(free free)
(exp `(cache-miss ,gf-sym
,(if rest? `(cons* ,@args rest) args))))
,(if rest?
`(cons* ,@args rest)
`(list ,@args)))))
(cond
((null? methods)
(values `(,(if rest? `(,@args . rest) args)
@ -189,38 +191,41 @@
;; get out before it blows o/~
;;
(define timer-init 10)
(define *in-progress* (make-fluid))
(fluid-set! *in-progress* '())
(define (delayed-compile gf)
(let ((timer timer-init))
(lambda args
(cond
((> timer 0)
(set! timer (1- timer))
(cache-dispatch gf args))
(else
(let ((in-progress (fluid-ref *in-progress*)))
(if (memq gf in-progress)
(cache-dispatch gf args)
(with-fluids ((*in-progress* (cons gf in-progress)))
(cond
((zero? timer)
(let ((dispatch (compute-dispatch-procedure
gf (slot-ref gf 'effective-methods))))
(slot-set! gf 'procedure dispatch)
(apply dispatch args))))))))))
(apply dispatch args)))
(else
;; interestingly, this catches recursive compilation attempts as
;; well; in that case, timer is negative
(cache-dispatch gf args))))))
(define (cache-dispatch gf args)
(define (map-until n f ls)
(if (or (zero? n) (null? ls))
'()
(cons (f (car ls)) (map-until (1- n) f (cdr ls)))))
(define (equal? x y) ; can't use the stock equal? because it's a generic...
(cond ((pair? x) (and (pair? y)
(eq? (car x) (car y))
(equal? (cdr x) (cdr y))))
((null? x) (null? y))
(else #f)))
(if (slot-ref gf 'n-specialized)
(let ((types (map-until (slot-ref gf 'n-specialized) class-of args)))
(let lp ((cache (slot-ref gf 'effective-methods)))
(cond ((null? cache)
(cache-miss gf args))
((equal? (vector-ref (car cache) 1) types)
(apply (vector-ref (car cache) 3) args))
(else (lp (cdr cache)))))))
(else (lp (cdr cache))))))
(cache-miss gf args)))
(define (cache-miss gf args)
(apply (memoize-method! gf args (slot-ref gf '%cache)) args))