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e2c2a6994d
* 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.
87 lines
3.4 KiB
C
87 lines
3.4 KiB
C
/* Copyright (C) 2010 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifndef SCM_FOREIGN_H
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#define SCM_FOREIGN_H
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/* A subset of libffi's types. */
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typedef enum
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{
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SCM_FOREIGN_TYPE_VOID,
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SCM_FOREIGN_TYPE_FLOAT,
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SCM_FOREIGN_TYPE_DOUBLE,
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SCM_FOREIGN_TYPE_UINT8,
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SCM_FOREIGN_TYPE_INT8,
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SCM_FOREIGN_TYPE_UINT16,
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SCM_FOREIGN_TYPE_INT16,
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SCM_FOREIGN_TYPE_UINT32,
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SCM_FOREIGN_TYPE_INT32,
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SCM_FOREIGN_TYPE_UINT64,
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SCM_FOREIGN_TYPE_INT64,
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SCM_FOREIGN_TYPE_STRUCT,
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SCM_FOREIGN_TYPE_POINTER
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} scm_t_foreign_type;
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typedef void (*scm_t_foreign_finalizer) (void *);
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#define SCM_FOREIGN_P(x) \
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(!SCM_IMP (x) && SCM_TYP7(x) == scm_tc7_foreign)
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#define SCM_VALIDATE_FOREIGN(pos, x) \
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SCM_MAKE_VALIDATE (pos, x, FOREIGN_P)
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#define SCM_FOREIGN_TYPE(x) \
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((scm_t_foreign_type)((SCM_CELL_WORD_0 (x) >> 8)&0xff))
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#define SCM_FOREIGN_OBJECT(x, ctype) \
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((ctype*)SCM_CELL_OBJECT_1 (x))
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#define SCM_FOREIGN_OBJECT_REF(x, ctype) \
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(*SCM_FOREIGN_OBJECT (x, ctype))
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#define SCM_FOREIGN_OBJECT_SET(x, ctype, val) \
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(*SCM_FOREIGN_OBJECT (x, ctype) = (val))
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#define SCM_FOREIGN_TYPED_P(x, type) \
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(SCM_FOREIGN_P (x) && SCM_FOREIGN_TYPE (x) == SCM_FOREIGN_TYPE_##type)
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#define SCM_VALIDATE_FOREIGN_TYPED(pos, x, type) \
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do { \
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SCM_ASSERT_TYPE (SCM_FOREIGN_TYPED_P (x, type), x, pos, FUNC_NAME, \
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"FOREIGN_"#type"_P"); \
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} while (0)
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#define SCM_FOREIGN_SIMPLE_P(x) \
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(SCM_FOREIGN_P (x) \
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&& SCM_FOREIGN_TYPE (x) != SCM_FOREIGN_TYPE_VOID \
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&& SCM_FOREIGN_TYPE (x) != SCM_FOREIGN_TYPE_STRUCT \
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&& SCM_FOREIGN_TYPE (x) != SCM_FOREIGN_TYPE_POINTER)
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#define SCM_VALIDATE_FOREIGN_SIMPLE(pos, x) \
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SCM_MAKE_VALIDATE (pos, x, FOREIGN_SIMPLE_P)
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SCM_API SCM scm_c_from_foreign (scm_t_foreign_type type, void *val, size_t size,
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scm_t_foreign_finalizer finalizer);
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SCM_API SCM scm_c_take_foreign (scm_t_foreign_type type, void *val,
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scm_t_foreign_finalizer finalizer);
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SCM_API SCM scm_foreign_ref (SCM foreign);
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SCM_API SCM scm_foreign_set_x (SCM foreign, SCM val);
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SCM_INTERNAL void scm_i_foreign_print (SCM foreign, SCM port,
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scm_print_state *pstate);
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SCM_INTERNAL void scm_init_foreign (void);
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#endif /* SCM_FOREIGN_H */
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