* libguile/foreign.h:
* libguile/foreign.c (scm_foreign_set_finalizer_x): New function, for a
limited form of finalization (like `free').
(scm_alignof, scm_sizeof, parse_ffi_type, fill_ffi_type): For the
purposes of make-foreign-function, treat '* (the asterisk symbol) as a
pointer.
* module/system/foreign.scm: Export foreign-set-finalizer!.
* libguile/Makefile.am (AM_CPPFLAGS): Move LIBFFI_CFLAGS here (from
AM_CFLAGS), allowing snarfing to work.
* libguile/foreign.h (scm_make_foreign_function): New public function.
* libguile/foreign.c: Flesh out an implementation of foreign functions.
(scm_take_foreign_pointer): Bugfix for the case in which we have a
finalizer.
* module/system/foreign.scm: Export `make-foreign-function'.
* libguile/foreign.h:
* libguile/foreign.c (scm_foreign_ref, scm_foreign_set_x): Remove all
bits about offsets and aliasing; bytevectors are much better at that.
(scm_foreign_to_bytevector, scm_bytevector_to_foreign): New functions
for getting at the bytes of a memory region.
* module/system/foreign.scm (foreign->bytevector, bytevector->foreign):
Export these.
* libguile/foreign.h:
* libguile/init.c: Change so that init just registers an extension,
later called by foreign.scm.
* libguile/foreign.c (scm_init_foreign): Define constants for the
various foreign types.
* module/Makefile.am:
* module/system/foreign.scm: New module, for the foreign function
interface.
* 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.
