* libguile/foreign.c:
* libguile/foreign.h: Rework interface to be more pointer-centric.
Details are:
(SCM_FOREIGN_TYPE_STRUCT, SCM_FOREIGN_TYPE_POINTER): Removed; now the
pointer in a foreign is first-class. If it points to a native type
like uint32, then it still has a tag; but if it points to something
else, like a struct or a pointer or something, then its type is VOID
(i.e., void*).
(SCM_FOREIGN_POINTER): Rename from SCM_FOREIGN_OBJECT.
(SCM_FOREIGN_VALUE_REF, SCM_FOREIGN_VALUE_SET): Rename from
SCM_FOREIGN_OBJECT_REF and SCM_FOREIGN_OBJECT_SET, to indicate that
they only work with value types.
(SCM_FOREIGN_HAS_FINALIZER): Reserve a bit to indicate if the foreign
pointer in question has a finalizer registered.
(SCM_FOREIGN_LEN): For void* pointers, optionally store the length in
bytes of the associated memory region.
(SCM_FOREIGN_VALUE_P): Rename from SCM_FOREIGN_SIMPLE_P.
(SCM_VALIDATE_FOREIGN_VALUE): Rename from SCM_VALIDATE_FOREIGN_SIMPLE.
(scm_take_foreign_pointer): Rename from scm_c_take_foreign. Remove
scm_c_from_foreign.
(scm_foreign_type): New accessor.
(scm_foreign_ref, scm_foreign_set_x): Take some optional args, used
when dereferencing void pointers.
* libguile/dynl.h:
* libguile/dynl.c (scm_dynamic_pointer): New function, used by
scm_dynamic_func. Adapt code to foreign.h changes.
* libguile/goops.c (scm_enable_primitive_generic_x)
(scm_set_primitive_generic_x): Use the SCM_SET_SUBR_GENERIC macro.
* libguile/gsubr.c (create_gsubr): Adapt to API change.
* libguile/gsubr.h (SCM_SUBRF, SCM_SUBR_GENERIC): Store the pointer
directly, not indirected.
* libguile/snarf.h (SCM_DEFINE, SCM_IMMUTABLE_FOREIGN): Store subr
pointers directly. Adapt to SCM_FOREIGN_TYPE_VOID change.
* libguile/vm-i-system.c (subr-call): Access the void* directly.
* libguile/foreign.h:
* libguile/foreign.c: New files, implementing simple wrappers around
foreign values, such as those that one might link in dynamically from
a library.
* libguile/tags.h (scm_tc7_foreign): Take a tc7 for foreign values.
* libguile.h:
* libguile/init.c: Add foreign.h to headers and init.
* libguile/print.c (iprin1): Add printer for foreign values.
* libguile/gc.c (scm_i_tag_name): Case for foreign values.
* libguile/goops.c (scm_class_of, create_standard_classes): Add a class
for foreign values.
* libguile/evalext.c (scm_self_evaluating_p): Add case for foreign
values.
* libguile/Makefile.am: Add foreign.[ch] to the build.
