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e2c2a699 AW |
1 | /* Copyright (C) 2010 Free Software Foundation, Inc. |
2 | * | |
3 | * This library is free software; you can redistribute it and/or | |
4 | * modify it under the terms of the GNU Lesser General Public License | |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
7 | * | |
8 | * This library is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU Lesser General Public | |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301 USA | |
17 | */ | |
18 | ||
19 | #if HAVE_CONFIG_H | |
20 | # include <config.h> | |
21 | #endif | |
22 | ||
d8b04f04 AW |
23 | #include <ffi.h> |
24 | ||
25 | #include <alignof.h> | |
e2c2a699 | 26 | #include <string.h> |
ea7d717b | 27 | #include "libguile/_scm.h" |
20aafae2 | 28 | #include "libguile/bytevectors.h" |
d8b04f04 | 29 | #include "libguile/instructions.h" |
ea7d717b | 30 | #include "libguile/foreign.h" |
e2c2a699 AW |
31 | |
32 | \f | |
33 | ||
ab4779ff AW |
34 | SCM_SYMBOL (sym_void, "void"); |
35 | SCM_SYMBOL (sym_float, "float"); | |
36 | SCM_SYMBOL (sym_double, "double"); | |
37 | SCM_SYMBOL (sym_uint8, "uint8"); | |
38 | SCM_SYMBOL (sym_int8, "int8"); | |
39 | SCM_SYMBOL (sym_uint16, "uint16"); | |
40 | SCM_SYMBOL (sym_int16, "int16"); | |
41 | SCM_SYMBOL (sym_uint32, "uint32"); | |
42 | SCM_SYMBOL (sym_int32, "int32"); | |
43 | SCM_SYMBOL (sym_uint64, "uint64"); | |
44 | SCM_SYMBOL (sym_int64, "int64"); | |
dd1464bf LC |
45 | SCM_SYMBOL (sym_int, "int"); |
46 | SCM_SYMBOL (sym_long, "long"); | |
47 | SCM_SYMBOL (sym_unsigned_int, "unsigned-int"); | |
48 | SCM_SYMBOL (sym_unsigned_long, "unsigned-long"); | |
49 | SCM_SYMBOL (sym_size_t, "size_t"); | |
ab4779ff | 50 | |
3435f3c0 AW |
51 | /* that's for pointers, you know. */ |
52 | SCM_SYMBOL (sym_asterisk, "*"); | |
53 | ||
54 | ||
d8b04f04 AW |
55 | static SCM cif_to_procedure (SCM cif, SCM func_ptr); |
56 | ||
57 | ||
20aafae2 AW |
58 | static SCM foreign_weak_refs = SCM_BOOL_F; |
59 | ||
60 | static void | |
61 | register_weak_reference (SCM from, SCM to) | |
62 | { | |
63 | scm_hashq_set_x (foreign_weak_refs, from, to); | |
64 | } | |
65 | ||
e2c2a699 AW |
66 | static void |
67 | foreign_finalizer_trampoline (GC_PTR ptr, GC_PTR data) | |
68 | { | |
69 | scm_t_foreign_finalizer finalizer = data; | |
52fd9639 | 70 | finalizer (SCM_FOREIGN_POINTER (PTR2SCM (ptr), void)); |
e2c2a699 AW |
71 | } |
72 | ||
73 | SCM | |
52fd9639 AW |
74 | scm_take_foreign_pointer (scm_t_foreign_type type, void *ptr, size_t len, |
75 | scm_t_foreign_finalizer finalizer) | |
e2c2a699 | 76 | { |
9fdee5b4 | 77 | SCM ret; |
52fd9639 | 78 | scm_t_bits word0; |
e2c2a699 | 79 | |
52fd9639 AW |
80 | word0 = (scm_t_bits)(scm_tc7_foreign | (type<<8) |
81 | | (finalizer ? (1<<16) : 0) | (len<<17)); | |
d8b04f04 | 82 | if (SCM_UNLIKELY ((word0 >> 17) != len)) |
52fd9639 AW |
83 | scm_out_of_range ("scm_take_foreign_pointer", scm_from_size_t (len)); |
84 | ||
85 | ret = PTR2SCM (scm_gc_malloc_pointerless (sizeof (scm_t_bits) * 2, | |
9fdee5b4 | 86 | "foreign")); |
52fd9639 AW |
87 | SCM_SET_CELL_WORD_0 (ret, word0); |
88 | SCM_SET_CELL_WORD_1 (ret, (scm_t_bits)ptr); | |
e2c2a699 AW |
89 | |
90 | if (finalizer) | |
91 | { | |
92 | /* Register a finalizer for the newly created instance. */ | |
93 | GC_finalization_proc prev_finalizer; | |
94 | GC_PTR prev_finalizer_data; | |
9fdee5b4 | 95 | GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (ret), |
e2c2a699 AW |
96 | foreign_finalizer_trampoline, |
97 | finalizer, | |
98 | &prev_finalizer, | |
99 | &prev_finalizer_data); | |
100 | } | |
101 | ||
9fdee5b4 | 102 | return ret; |
e2c2a699 AW |
103 | } |
104 | ||
20aafae2 AW |
105 | SCM_DEFINE (scm_foreign_ref, "foreign-ref", 1, 0, 0, |
106 | (SCM foreign), | |
e2c2a699 | 107 | "Reference the foreign value wrapped by @var{foreign}.\n\n" |
20aafae2 | 108 | "The value will be referenced according to its type.") |
e2c2a699 AW |
109 | #define FUNC_NAME s_scm_foreign_ref |
110 | { | |
52fd9639 AW |
111 | scm_t_foreign_type ftype; |
112 | scm_t_uint8 *ptr; | |
e2c2a699 | 113 | |
52fd9639 AW |
114 | SCM_VALIDATE_FOREIGN (1, foreign); |
115 | ptr = SCM_FOREIGN_POINTER (foreign, scm_t_uint8); | |
52fd9639 | 116 | ftype = SCM_FOREIGN_TYPE (foreign); |
52fd9639 AW |
117 | |
118 | /* FIXME: is there a window in which we can see ptr but not foreign? */ | |
20aafae2 | 119 | /* FIXME: accessing unaligned pointers */ |
52fd9639 | 120 | switch (ftype) |
e2c2a699 | 121 | { |
20aafae2 AW |
122 | case SCM_FOREIGN_TYPE_VOID: |
123 | return scm_from_ulong ((unsigned long)ptr); | |
e2c2a699 | 124 | case SCM_FOREIGN_TYPE_FLOAT: |
52fd9639 | 125 | return scm_from_double (*(float*)ptr); |
e2c2a699 | 126 | case SCM_FOREIGN_TYPE_DOUBLE: |
52fd9639 | 127 | return scm_from_double (*(double*)ptr); |
e2c2a699 | 128 | case SCM_FOREIGN_TYPE_UINT8: |
52fd9639 | 129 | return scm_from_uint8 (*(scm_t_uint8*)ptr); |
e2c2a699 | 130 | case SCM_FOREIGN_TYPE_INT8: |
52fd9639 | 131 | return scm_from_int8 (*(scm_t_int8*)ptr); |
e2c2a699 | 132 | case SCM_FOREIGN_TYPE_UINT16: |
52fd9639 | 133 | return scm_from_uint16 (*(scm_t_uint16*)ptr); |
e2c2a699 | 134 | case SCM_FOREIGN_TYPE_INT16: |
52fd9639 | 135 | return scm_from_int16 (*(scm_t_int16*)ptr); |
e2c2a699 | 136 | case SCM_FOREIGN_TYPE_UINT32: |
52fd9639 | 137 | return scm_from_uint32 (*(scm_t_uint32*)ptr); |
e2c2a699 | 138 | case SCM_FOREIGN_TYPE_INT32: |
52fd9639 | 139 | return scm_from_int32 (*(scm_t_int32*)ptr); |
e2c2a699 | 140 | case SCM_FOREIGN_TYPE_UINT64: |
52fd9639 | 141 | return scm_from_uint64 (*(scm_t_uint64*)ptr); |
e2c2a699 | 142 | case SCM_FOREIGN_TYPE_INT64: |
52fd9639 | 143 | return scm_from_int64 (*(scm_t_int64*)ptr); |
e2c2a699 | 144 | default: |
75383ddb | 145 | scm_wrong_type_arg_msg (FUNC_NAME, 1, foreign, "foreign"); |
e2c2a699 AW |
146 | } |
147 | } | |
148 | #undef FUNC_NAME | |
149 | ||
20aafae2 AW |
150 | SCM_DEFINE (scm_foreign_set_x, "foreign-set!", 2, 0, 0, |
151 | (SCM foreign, SCM val), | |
e2c2a699 | 152 | "Set the foreign value wrapped by @var{foreign}.\n\n" |
20aafae2 | 153 | "The value will be set according to its type.") |
e2c2a699 AW |
154 | #define FUNC_NAME s_scm_foreign_set_x |
155 | { | |
52fd9639 AW |
156 | scm_t_foreign_type ftype; |
157 | scm_t_uint8 *ptr; | |
e2c2a699 | 158 | |
52fd9639 AW |
159 | SCM_VALIDATE_FOREIGN (1, foreign); |
160 | ptr = SCM_FOREIGN_POINTER (foreign, scm_t_uint8); | |
52fd9639 | 161 | ftype = SCM_FOREIGN_TYPE (foreign); |
20aafae2 | 162 | |
52fd9639 | 163 | /* FIXME: is there a window in which we can see ptr but not foreign? */ |
20aafae2 | 164 | /* FIXME: unaligned access */ |
52fd9639 | 165 | switch (ftype) |
e2c2a699 | 166 | { |
20aafae2 AW |
167 | case SCM_FOREIGN_TYPE_VOID: |
168 | SCM_SET_CELL_WORD_1 (foreign, scm_to_ulong (val)); | |
169 | break; | |
e2c2a699 | 170 | case SCM_FOREIGN_TYPE_FLOAT: |
52fd9639 | 171 | *(float*)ptr = scm_to_double (val); |
e2c2a699 AW |
172 | break; |
173 | case SCM_FOREIGN_TYPE_DOUBLE: | |
52fd9639 | 174 | *(double*)ptr = scm_to_double (val); |
e2c2a699 AW |
175 | break; |
176 | case SCM_FOREIGN_TYPE_UINT8: | |
52fd9639 | 177 | *(scm_t_uint8*)ptr = scm_to_uint8 (val); |
e2c2a699 AW |
178 | break; |
179 | case SCM_FOREIGN_TYPE_INT8: | |
52fd9639 | 180 | *(scm_t_int8*)ptr = scm_to_int8 (val); |
e2c2a699 AW |
181 | break; |
182 | case SCM_FOREIGN_TYPE_UINT16: | |
52fd9639 | 183 | *(scm_t_uint16*)ptr = scm_to_uint16 (val); |
e2c2a699 AW |
184 | break; |
185 | case SCM_FOREIGN_TYPE_INT16: | |
52fd9639 | 186 | *(scm_t_int16*)ptr = scm_to_int16 (val); |
e2c2a699 AW |
187 | break; |
188 | case SCM_FOREIGN_TYPE_UINT32: | |
52fd9639 | 189 | *(scm_t_uint32*)ptr = scm_to_uint32 (val); |
e2c2a699 AW |
190 | break; |
191 | case SCM_FOREIGN_TYPE_INT32: | |
52fd9639 | 192 | *(scm_t_int32*)ptr = scm_to_int32 (val); |
e2c2a699 AW |
193 | break; |
194 | case SCM_FOREIGN_TYPE_UINT64: | |
52fd9639 | 195 | *(scm_t_uint64*)ptr = scm_to_uint64 (val); |
e2c2a699 AW |
196 | break; |
197 | case SCM_FOREIGN_TYPE_INT64: | |
52fd9639 | 198 | *(scm_t_int64*)ptr = scm_to_int64 (val); |
e2c2a699 | 199 | break; |
e2c2a699 | 200 | default: |
75383ddb | 201 | scm_wrong_type_arg_msg (FUNC_NAME, 1, val, "foreign"); |
e2c2a699 | 202 | } |
52fd9639 | 203 | |
e2c2a699 AW |
204 | return SCM_UNSPECIFIED; |
205 | } | |
206 | #undef FUNC_NAME | |
207 | ||
20aafae2 AW |
208 | SCM_DEFINE (scm_foreign_to_bytevector, "foreign->bytevector", 1, 3, 0, |
209 | (SCM foreign, SCM uvec_type, SCM offset, SCM len), | |
210 | "Return a bytevector aliasing the memory pointed to by\n" | |
211 | "@var{foreign}.\n\n" | |
212 | "@var{foreign} must be a void pointer, a foreign whose type is\n" | |
213 | "@var{void}. By default, the resulting bytevector will alias\n" | |
214 | "all of the memory pointed to by @var{foreign}, from beginning\n" | |
215 | "to end, treated as a @code{vu8} array.\n\n" | |
216 | "The user may specify an alternate default interpretation for\n" | |
217 | "the memory by passing the @var{uvec_type} argument, to indicate\n" | |
218 | "that the memory is an array of elements of that type.\n" | |
219 | "@var{uvec_type} should be something that\n" | |
220 | "@code{uniform-vector-element-type} would return, like @code{f32}\n" | |
221 | "or @code{s16}.\n\n" | |
222 | "Users may also specify that the bytevector should only alias a\n" | |
223 | "subset of the memory, by specifying @var{offset} and @var{len}\n" | |
224 | "arguments.") | |
225 | #define FUNC_NAME s_scm_foreign_to_bytevector | |
226 | { | |
227 | SCM ret; | |
228 | scm_t_int8 *ptr; | |
229 | size_t boffset, blen; | |
230 | scm_t_array_element_type btype; | |
231 | ||
232 | SCM_VALIDATE_FOREIGN_TYPED (1, foreign, VOID); | |
233 | ptr = SCM_FOREIGN_POINTER (foreign, scm_t_int8); | |
234 | ||
235 | if (SCM_UNBNDP (uvec_type)) | |
236 | btype = SCM_ARRAY_ELEMENT_TYPE_VU8; | |
237 | else | |
238 | { | |
239 | int i; | |
240 | for (i = 0; i <= SCM_ARRAY_ELEMENT_TYPE_LAST; i++) | |
241 | if (scm_is_eq (uvec_type, scm_i_array_element_types[i])) | |
242 | break; | |
243 | switch (i) | |
244 | { | |
245 | case SCM_ARRAY_ELEMENT_TYPE_VU8: | |
246 | case SCM_ARRAY_ELEMENT_TYPE_U8: | |
247 | case SCM_ARRAY_ELEMENT_TYPE_S8: | |
248 | case SCM_ARRAY_ELEMENT_TYPE_U16: | |
249 | case SCM_ARRAY_ELEMENT_TYPE_S16: | |
250 | case SCM_ARRAY_ELEMENT_TYPE_U32: | |
251 | case SCM_ARRAY_ELEMENT_TYPE_S32: | |
252 | case SCM_ARRAY_ELEMENT_TYPE_U64: | |
253 | case SCM_ARRAY_ELEMENT_TYPE_S64: | |
254 | case SCM_ARRAY_ELEMENT_TYPE_F32: | |
255 | case SCM_ARRAY_ELEMENT_TYPE_F64: | |
256 | case SCM_ARRAY_ELEMENT_TYPE_C32: | |
257 | case SCM_ARRAY_ELEMENT_TYPE_C64: | |
258 | btype = i; | |
259 | break; | |
260 | default: | |
261 | scm_wrong_type_arg_msg (FUNC_NAME, SCM_ARG1, uvec_type, | |
262 | "uniform vector type"); | |
263 | } | |
264 | } | |
265 | ||
266 | if (SCM_UNBNDP (offset)) | |
267 | boffset = 0; | |
268 | else if (SCM_FOREIGN_LEN (foreign)) | |
269 | boffset = scm_to_unsigned_integer (offset, 0, | |
270 | SCM_FOREIGN_LEN (foreign) - 1); | |
271 | else | |
272 | boffset = scm_to_size_t (offset); | |
273 | ||
274 | if (SCM_UNBNDP (len)) | |
275 | { | |
276 | if (SCM_FOREIGN_LEN (foreign)) | |
277 | blen = SCM_FOREIGN_LEN (foreign) - boffset; | |
278 | else | |
279 | scm_misc_error (FUNC_NAME, | |
280 | "length needed to convert foreign pointer to bytevector", | |
281 | SCM_EOL); | |
282 | } | |
283 | else | |
284 | { | |
285 | if (SCM_FOREIGN_LEN (foreign)) | |
286 | blen = scm_to_unsigned_integer (len, 0, | |
287 | SCM_FOREIGN_LEN (foreign) - boffset); | |
288 | else | |
289 | blen = scm_to_size_t (len); | |
290 | } | |
291 | ||
292 | ret = scm_c_take_typed_bytevector (ptr + boffset, blen, btype); | |
293 | register_weak_reference (ret, foreign); | |
294 | return ret; | |
295 | } | |
296 | #undef FUNC_NAME | |
297 | ||
298 | SCM_DEFINE (scm_bytevector_to_foreign, "bytevector->foreign", 1, 2, 0, | |
299 | (SCM bv, SCM offset, SCM len), | |
300 | "Return a foreign pointer aliasing the memory pointed to by\n" | |
301 | "@var{bv}.\n\n" | |
302 | "The resulting foreign will be a void pointer, a foreign whose\n" | |
303 | "type is @code{void}. By default it will alias all of the\n" | |
304 | "memory pointed to by @var{bv}, from beginning to end.\n\n" | |
305 | "Users may explicily specify that the foreign should only alias a\n" | |
306 | "subset of the memory, by specifying @var{offset} and @var{len}\n" | |
307 | "arguments.") | |
308 | #define FUNC_NAME s_scm_bytevector_to_foreign | |
309 | { | |
310 | SCM ret; | |
311 | scm_t_int8 *ptr; | |
312 | size_t boffset, blen; | |
313 | ||
314 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
315 | ptr = SCM_BYTEVECTOR_CONTENTS (bv); | |
316 | ||
317 | if (SCM_UNBNDP (offset)) | |
318 | boffset = 0; | |
319 | else | |
320 | boffset = scm_to_unsigned_integer (offset, 0, | |
321 | SCM_BYTEVECTOR_LENGTH (bv) - 1); | |
322 | ||
323 | if (SCM_UNBNDP (len)) | |
324 | blen = SCM_BYTEVECTOR_LENGTH (bv) - boffset; | |
325 | else | |
326 | blen = scm_to_unsigned_integer (len, 0, | |
327 | SCM_BYTEVECTOR_LENGTH (bv) - boffset); | |
328 | ||
329 | ret = scm_take_foreign_pointer (SCM_FOREIGN_TYPE_VOID, ptr + boffset, blen, | |
330 | NULL); | |
331 | register_weak_reference (ret, bv); | |
332 | return ret; | |
333 | } | |
334 | #undef FUNC_NAME | |
335 | ||
3435f3c0 AW |
336 | SCM_DEFINE (scm_foreign_set_finalizer_x, "foreign-set-finalizer!", 2, 0, 0, |
337 | (SCM foreign, SCM finalizer), | |
338 | "Arrange for the C procedure wrapped by @var{finalizer} to be\n" | |
339 | "called on the pointer wrapped by @var{foreign} when @var{foreign}\n" | |
340 | "becomes unreachable. Note: the C procedure should not call into\n" | |
341 | "Scheme. If you need a Scheme finalizer, use guardians.") | |
342 | #define FUNC_NAME s_scm_foreign_set_finalizer_x | |
343 | { | |
344 | void *c_finalizer; | |
345 | GC_finalization_proc prev_finalizer; | |
346 | GC_PTR prev_finalizer_data; | |
347 | ||
348 | SCM_VALIDATE_FOREIGN_TYPED (1, foreign, VOID); | |
349 | SCM_VALIDATE_FOREIGN_TYPED (2, finalizer, VOID); | |
350 | ||
351 | c_finalizer = SCM_FOREIGN_POINTER (finalizer, void); | |
352 | ||
353 | SCM_SET_CELL_WORD_0 (foreign, SCM_CELL_WORD_0 (foreign) | (1<<16)); | |
354 | ||
355 | GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (foreign), | |
356 | foreign_finalizer_trampoline, | |
357 | c_finalizer, | |
358 | &prev_finalizer, | |
359 | &prev_finalizer_data); | |
360 | ||
361 | return SCM_UNSPECIFIED; | |
362 | } | |
363 | #undef FUNC_NAME | |
364 | ||
365 | \f | |
366 | ||
e2c2a699 AW |
367 | void |
368 | scm_i_foreign_print (SCM foreign, SCM port, scm_print_state *pstate) | |
369 | { | |
370 | scm_puts ("#<foreign ", port); | |
371 | switch (SCM_FOREIGN_TYPE (foreign)) | |
372 | { | |
e2c2a699 AW |
373 | case SCM_FOREIGN_TYPE_FLOAT: |
374 | scm_puts ("float ", port); | |
e2c2a699 AW |
375 | break; |
376 | case SCM_FOREIGN_TYPE_DOUBLE: | |
377 | scm_puts ("double ", port); | |
e2c2a699 AW |
378 | break; |
379 | case SCM_FOREIGN_TYPE_UINT8: | |
380 | scm_puts ("uint8 ", port); | |
e2c2a699 AW |
381 | break; |
382 | case SCM_FOREIGN_TYPE_INT8: | |
383 | scm_puts ("int8 ", port); | |
e2c2a699 AW |
384 | break; |
385 | case SCM_FOREIGN_TYPE_UINT16: | |
386 | scm_puts ("uint16 ", port); | |
e2c2a699 AW |
387 | break; |
388 | case SCM_FOREIGN_TYPE_INT16: | |
389 | scm_puts ("int16 ", port); | |
e2c2a699 AW |
390 | break; |
391 | case SCM_FOREIGN_TYPE_UINT32: | |
392 | scm_puts ("uint32 ", port); | |
e2c2a699 AW |
393 | break; |
394 | case SCM_FOREIGN_TYPE_INT32: | |
395 | scm_puts ("int32 ", port); | |
e2c2a699 AW |
396 | break; |
397 | case SCM_FOREIGN_TYPE_UINT64: | |
398 | scm_puts ("uint64 ", port); | |
e2c2a699 AW |
399 | break; |
400 | case SCM_FOREIGN_TYPE_INT64: | |
401 | scm_puts ("int64 ", port); | |
e2c2a699 | 402 | break; |
52fd9639 | 403 | case SCM_FOREIGN_TYPE_VOID: |
20aafae2 | 404 | scm_puts ("pointer ", port); |
e2c2a699 AW |
405 | break; |
406 | default: | |
75383ddb | 407 | scm_wrong_type_arg_msg ("%print-foreign", 1, foreign, "foreign"); |
e2c2a699 | 408 | } |
20aafae2 | 409 | scm_display (scm_foreign_ref (foreign), port); |
e2c2a699 AW |
410 | scm_putc ('>', port); |
411 | } | |
412 | ||
413 | \f | |
414 | ||
9a396cbd | 415 | |
d8b04f04 AW |
416 | #define ROUND_UP(len,align) (align?(((len-1)|(align-1))+1):len) |
417 | ||
9a396cbd AW |
418 | SCM_DEFINE (scm_alignof, "alignof", 1, 0, 0, (SCM type), "") |
419 | #define FUNC_NAME s_scm_alignof | |
420 | { | |
421 | if (SCM_I_INUMP (type)) | |
422 | { | |
423 | switch (SCM_I_INUM (type)) | |
424 | { | |
425 | case SCM_FOREIGN_TYPE_FLOAT: | |
426 | return scm_from_size_t (alignof (float)); | |
427 | case SCM_FOREIGN_TYPE_DOUBLE: | |
428 | return scm_from_size_t (alignof (double)); | |
429 | case SCM_FOREIGN_TYPE_UINT8: | |
430 | return scm_from_size_t (alignof (scm_t_uint8)); | |
431 | case SCM_FOREIGN_TYPE_INT8: | |
432 | return scm_from_size_t (alignof (scm_t_int8)); | |
433 | case SCM_FOREIGN_TYPE_UINT16: | |
434 | return scm_from_size_t (alignof (scm_t_uint16)); | |
435 | case SCM_FOREIGN_TYPE_INT16: | |
436 | return scm_from_size_t (alignof (scm_t_int16)); | |
437 | case SCM_FOREIGN_TYPE_UINT32: | |
438 | return scm_from_size_t (alignof (scm_t_uint32)); | |
439 | case SCM_FOREIGN_TYPE_INT32: | |
440 | return scm_from_size_t (alignof (scm_t_int32)); | |
441 | case SCM_FOREIGN_TYPE_UINT64: | |
442 | return scm_from_size_t (alignof (scm_t_uint64)); | |
443 | case SCM_FOREIGN_TYPE_INT64: | |
444 | return scm_from_size_t (alignof (scm_t_int64)); | |
445 | default: | |
446 | scm_wrong_type_arg (FUNC_NAME, 1, type); | |
447 | } | |
448 | } | |
3435f3c0 AW |
449 | else if (scm_is_eq (type, sym_asterisk)) |
450 | /* a pointer */ | |
451 | return scm_from_size_t (alignof (void*)); | |
9a396cbd AW |
452 | else if (scm_is_pair (type)) |
453 | /* a struct, yo */ | |
454 | return scm_alignof (scm_car (type)); | |
455 | else | |
456 | scm_wrong_type_arg (FUNC_NAME, 1, type); | |
457 | } | |
458 | #undef FUNC_NAME | |
459 | ||
460 | SCM_DEFINE (scm_sizeof, "sizeof", 1, 0, 0, (SCM type), "") | |
461 | #define FUNC_NAME s_scm_sizeof | |
462 | { | |
463 | if (SCM_I_INUMP (type)) | |
464 | { | |
465 | switch (SCM_I_INUM (type)) | |
466 | { | |
467 | case SCM_FOREIGN_TYPE_FLOAT: | |
468 | return scm_from_size_t (sizeof (float)); | |
469 | case SCM_FOREIGN_TYPE_DOUBLE: | |
470 | return scm_from_size_t (sizeof (double)); | |
471 | case SCM_FOREIGN_TYPE_UINT8: | |
472 | return scm_from_size_t (sizeof (scm_t_uint8)); | |
473 | case SCM_FOREIGN_TYPE_INT8: | |
474 | return scm_from_size_t (sizeof (scm_t_int8)); | |
475 | case SCM_FOREIGN_TYPE_UINT16: | |
476 | return scm_from_size_t (sizeof (scm_t_uint16)); | |
477 | case SCM_FOREIGN_TYPE_INT16: | |
478 | return scm_from_size_t (sizeof (scm_t_int16)); | |
479 | case SCM_FOREIGN_TYPE_UINT32: | |
480 | return scm_from_size_t (sizeof (scm_t_uint32)); | |
481 | case SCM_FOREIGN_TYPE_INT32: | |
482 | return scm_from_size_t (sizeof (scm_t_int32)); | |
483 | case SCM_FOREIGN_TYPE_UINT64: | |
484 | return scm_from_size_t (sizeof (scm_t_uint64)); | |
485 | case SCM_FOREIGN_TYPE_INT64: | |
486 | return scm_from_size_t (sizeof (scm_t_int64)); | |
487 | default: | |
488 | scm_wrong_type_arg (FUNC_NAME, 1, type); | |
489 | } | |
490 | } | |
3435f3c0 AW |
491 | else if (scm_is_eq (type, sym_asterisk)) |
492 | /* a pointer */ | |
493 | return scm_from_size_t (sizeof (void*)); | |
9a396cbd AW |
494 | else if (scm_is_pair (type)) |
495 | { | |
496 | /* a struct */ | |
497 | size_t off = 0; | |
498 | while (scm_is_pair (type)) | |
499 | { | |
500 | off = ROUND_UP (off, scm_to_size_t (scm_alignof (scm_car (type)))); | |
501 | off += scm_to_size_t (scm_sizeof (scm_car (type))); | |
502 | type = scm_cdr (type); | |
503 | } | |
504 | return scm_from_size_t (off); | |
505 | } | |
506 | else | |
507 | scm_wrong_type_arg (FUNC_NAME, 1, type); | |
508 | } | |
509 | #undef FUNC_NAME | |
510 | ||
511 | ||
d8b04f04 AW |
512 | /* return 1 on success, 0 on failure */ |
513 | static int | |
514 | parse_ffi_type (SCM type, int return_p, long *n_structs, long *n_struct_elts) | |
515 | { | |
516 | if (SCM_I_INUMP (type)) | |
517 | { | |
518 | if ((SCM_I_INUM (type) < 0 ) | |
519 | || (SCM_I_INUM (type) > SCM_FOREIGN_TYPE_LAST)) | |
520 | return 0; | |
521 | else if (SCM_I_INUM (type) == SCM_FOREIGN_TYPE_VOID && !return_p) | |
522 | return 0; | |
523 | else | |
524 | return 1; | |
525 | } | |
3435f3c0 AW |
526 | else if (scm_is_eq (type, sym_asterisk)) |
527 | /* a pointer */ | |
528 | return 1; | |
d8b04f04 AW |
529 | else |
530 | { | |
531 | long len; | |
532 | ||
533 | len = scm_ilength (type); | |
534 | if (len < 1) | |
535 | return 0; | |
536 | while (len--) | |
537 | { | |
538 | if (!parse_ffi_type (scm_car (type), 0, n_structs, n_struct_elts)) | |
539 | return 0; | |
540 | (*n_struct_elts)++; | |
541 | type = scm_cdr (type); | |
542 | } | |
543 | (*n_structs)++; | |
544 | return 1; | |
545 | } | |
546 | } | |
547 | ||
548 | static void | |
549 | fill_ffi_type (SCM type, ffi_type *ftype, ffi_type ***type_ptrs, | |
550 | ffi_type **types) | |
551 | { | |
552 | if (SCM_I_INUMP (type)) | |
553 | { | |
554 | switch (SCM_I_INUM (type)) | |
555 | { | |
556 | case SCM_FOREIGN_TYPE_FLOAT: | |
557 | *ftype = ffi_type_float; | |
558 | return; | |
559 | case SCM_FOREIGN_TYPE_DOUBLE: | |
560 | *ftype = ffi_type_double; | |
561 | return; | |
562 | case SCM_FOREIGN_TYPE_UINT8: | |
563 | *ftype = ffi_type_uint8; | |
564 | return; | |
565 | case SCM_FOREIGN_TYPE_INT8: | |
566 | *ftype = ffi_type_sint8; | |
567 | return; | |
568 | case SCM_FOREIGN_TYPE_UINT16: | |
569 | *ftype = ffi_type_uint16; | |
570 | return; | |
571 | case SCM_FOREIGN_TYPE_INT16: | |
572 | *ftype = ffi_type_sint16; | |
573 | return; | |
574 | case SCM_FOREIGN_TYPE_UINT32: | |
575 | *ftype = ffi_type_uint32; | |
576 | return; | |
577 | case SCM_FOREIGN_TYPE_INT32: | |
578 | *ftype = ffi_type_sint32; | |
579 | return; | |
580 | case SCM_FOREIGN_TYPE_UINT64: | |
581 | *ftype = ffi_type_uint64; | |
582 | return; | |
583 | case SCM_FOREIGN_TYPE_INT64: | |
584 | *ftype = ffi_type_sint64; | |
585 | return; | |
586 | case SCM_FOREIGN_TYPE_VOID: | |
587 | *ftype = ffi_type_void; | |
588 | return; | |
589 | default: | |
75383ddb AW |
590 | scm_wrong_type_arg_msg ("make-foreign-function", 0, type, |
591 | "foreign type"); | |
d8b04f04 AW |
592 | } |
593 | } | |
3435f3c0 AW |
594 | else if (scm_is_eq (type, sym_asterisk)) |
595 | /* a pointer */ | |
596 | { | |
597 | *ftype = ffi_type_pointer; | |
598 | return; | |
599 | } | |
d8b04f04 AW |
600 | else |
601 | { | |
602 | long i, len; | |
603 | ||
604 | len = scm_ilength (type); | |
605 | ||
606 | ftype->size = 0; | |
607 | ftype->alignment = 0; | |
608 | ftype->type = FFI_TYPE_STRUCT; | |
609 | ftype->elements = *type_ptrs; | |
610 | *type_ptrs += len + 1; | |
611 | ||
612 | for (i = 0; i < len; i++) | |
613 | { | |
9a396cbd AW |
614 | ftype->elements[i] = *types; |
615 | *types += 1; | |
d8b04f04 AW |
616 | fill_ffi_type (scm_car (type), ftype->elements[i], |
617 | type_ptrs, types); | |
618 | type = scm_cdr (type); | |
619 | } | |
620 | ftype->elements[i] = NULL; | |
621 | } | |
622 | } | |
623 | ||
624 | SCM_DEFINE (scm_make_foreign_function, "make-foreign-function", 3, 0, 0, | |
625 | (SCM return_type, SCM func_ptr, SCM arg_types), | |
626 | "foo") | |
627 | #define FUNC_NAME s_scm_make_foreign_function | |
628 | { | |
629 | SCM walk, scm_cif; | |
630 | long i, nargs, n_structs, n_struct_elts; | |
631 | size_t cif_len; | |
632 | char *mem; | |
633 | ffi_cif *cif; | |
634 | ffi_type **type_ptrs; | |
635 | ffi_type *types; | |
636 | ||
637 | SCM_VALIDATE_FOREIGN_TYPED (2, func_ptr, VOID); | |
638 | nargs = scm_ilength (arg_types); | |
639 | SCM_ASSERT (nargs >= 0, arg_types, 3, FUNC_NAME); | |
640 | /* fixme: assert nargs < 1<<32 */ | |
641 | n_structs = n_struct_elts = 0; | |
642 | ||
643 | /* For want of talloc, we're going to have to do this in two passes: first we | |
644 | figure out how much memory is needed for all types, then we allocate the | |
645 | cif and the types all in one block. */ | |
646 | if (!parse_ffi_type (return_type, 1, &n_structs, &n_struct_elts)) | |
647 | scm_wrong_type_arg (FUNC_NAME, 1, return_type); | |
648 | for (walk = arg_types; scm_is_pair (walk); walk = scm_cdr (walk)) | |
649 | if (!parse_ffi_type (scm_car (walk), 0, &n_structs, &n_struct_elts)) | |
650 | scm_wrong_type_arg (FUNC_NAME, 3, scm_car (walk)); | |
651 | ||
652 | /* the memory: with space for the cif itself */ | |
653 | cif_len = sizeof (ffi_cif); | |
654 | ||
655 | /* then ffi_type pointers: one for each arg, one for each struct | |
656 | element, and one for each struct (for null-termination) */ | |
657 | cif_len = (ROUND_UP (cif_len, alignof(void*)) | |
658 | + (nargs + n_structs + n_struct_elts)*sizeof(void*)); | |
659 | ||
660 | /* then the ffi_type structs themselves, one per arg and struct element, and | |
661 | one for the return val */ | |
662 | cif_len = (ROUND_UP (cif_len, alignof(ffi_type)) | |
663 | + (nargs + n_struct_elts + 1)*sizeof(ffi_type)); | |
087aa6aa LC |
664 | |
665 | mem = scm_gc_malloc_pointerless (cif_len, "foreign"); | |
666 | scm_cif = scm_take_foreign_pointer (SCM_FOREIGN_TYPE_VOID, mem, | |
667 | cif_len, NULL); | |
668 | cif = (ffi_cif *) mem; | |
669 | ||
d8b04f04 AW |
670 | /* reuse cif_len to walk through the mem */ |
671 | cif_len = ROUND_UP (sizeof (ffi_cif), alignof(void*)); | |
672 | type_ptrs = (ffi_type**)(mem + cif_len); | |
673 | cif_len = ROUND_UP (cif_len | |
674 | + (nargs + n_structs + n_struct_elts)*sizeof(void*), | |
675 | alignof(ffi_type)); | |
676 | types = (ffi_type*)(mem + cif_len); | |
677 | ||
678 | /* whew. now knit the pointers together. */ | |
679 | cif->rtype = types++; | |
680 | fill_ffi_type (return_type, cif->rtype, &type_ptrs, &types); | |
681 | cif->arg_types = type_ptrs; | |
682 | type_ptrs += nargs; | |
683 | for (walk = arg_types, i = 0; scm_is_pair (walk); walk = scm_cdr (walk), i++) | |
684 | { | |
685 | cif->arg_types[i] = types++; | |
686 | fill_ffi_type (scm_car (walk), cif->arg_types[i], &type_ptrs, &types); | |
687 | } | |
688 | ||
689 | /* round out the cif, and we're done. */ | |
690 | cif->abi = FFI_DEFAULT_ABI; | |
691 | cif->nargs = nargs; | |
692 | cif->bytes = 0; | |
693 | cif->flags = 0; | |
694 | ||
695 | if (FFI_OK != ffi_prep_cif (cif, FFI_DEFAULT_ABI, cif->nargs, cif->rtype, | |
696 | cif->arg_types)) | |
697 | scm_misc_error (FUNC_NAME, "ffi_prep_cif failed", SCM_EOL); | |
698 | ||
699 | return cif_to_procedure (scm_cif, func_ptr); | |
700 | } | |
701 | #undef FUNC_NAME | |
702 | ||
703 | \f | |
704 | ||
705 | /* Pre-generate trampolines for less than 10 arguments. */ | |
706 | ||
707 | #ifdef WORDS_BIGENDIAN | |
708 | #define OBJCODE_HEADER 0, 0, 0, 8, 0, 0, 0, 40 | |
709 | #define META_HEADER 0, 0, 0, 32, 0, 0, 0, 0 | |
710 | #else | |
711 | #define OBJCODE_HEADER 8, 0, 0, 0, 40, 0, 0, 0 | |
712 | #define META_HEADER 32, 0, 0, 0, 0, 0, 0, 0 | |
713 | #endif | |
714 | ||
715 | #define CODE(nreq) \ | |
716 | OBJCODE_HEADER, \ | |
717 | /* 0 */ scm_op_assert_nargs_ee, 0, nreq, /* assert number of args */ \ | |
718 | /* 3 */ scm_op_object_ref, 0, /* push the pair with the cif and the function pointer */ \ | |
719 | /* 5 */ scm_op_foreign_call, nreq, /* and call (will return value as well) */ \ | |
720 | /* 7 */ scm_op_nop, \ | |
721 | /* 8 */ META (3, 7, nreq) | |
722 | ||
723 | #define META(start, end, nreq) \ | |
724 | META_HEADER, \ | |
725 | /* 0 */ scm_op_make_eol, /* bindings */ \ | |
726 | /* 1 */ scm_op_make_eol, /* sources */ \ | |
727 | /* 2 */ scm_op_make_int8, start, scm_op_make_int8, end, /* arity: from ip N to ip N */ \ | |
728 | /* 6 */ scm_op_make_int8, nreq, /* the arity is N required args */ \ | |
729 | /* 8 */ scm_op_list, 0, 3, /* make a list of those 3 vals */ \ | |
730 | /* 11 */ scm_op_list, 0, 1, /* and the arities will be a list of that one list */ \ | |
731 | /* 14 */ scm_op_load_symbol, 0, 0, 4, 'n', 'a', 'm', 'e', /* `name' */ \ | |
732 | /* 22 */ scm_op_object_ref, 1, /* the name from the object table */ \ | |
733 | /* 24 */ scm_op_cons, /* make a pair for the properties */ \ | |
734 | /* 25 */ scm_op_list, 0, 4, /* pack bindings, sources, and arities into list */ \ | |
735 | /* 28 */ scm_op_return, /* and return */ \ | |
736 | /* 29 */ scm_op_nop, scm_op_nop, scm_op_nop \ | |
737 | /* 32 */ | |
738 | ||
739 | static const struct | |
740 | { | |
741 | scm_t_uint64 dummy; /* ensure 8-byte alignment; perhaps there's a better way */ | |
742 | const scm_t_uint8 bytes[10 * (sizeof (struct scm_objcode) + 8 | |
743 | + sizeof (struct scm_objcode) + 32)]; | |
744 | } raw_bytecode = { | |
745 | 0, | |
746 | { | |
747 | CODE (0), CODE (1), CODE (2), CODE (3), CODE (4), | |
748 | CODE (5), CODE (6), CODE (7), CODE (8), CODE (9) | |
749 | } | |
750 | }; | |
751 | ||
752 | #undef CODE | |
753 | #undef META | |
754 | #undef OBJCODE_HEADER | |
755 | #undef META_HEADER | |
756 | ||
757 | /* | |
758 | (defun generate-objcode-cells (n) | |
759 | "Generate objcode cells for up to N arguments" | |
760 | (interactive "p") | |
761 | (let ((i 0)) | |
762 | (while (< i n) | |
763 | (insert | |
764 | (format " { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + %d) },\n" | |
765 | (* (+ 4 4 8 4 4 32) i))) | |
766 | (insert " { SCM_BOOL_F, SCM_PACK (0) },\n") | |
767 | (setq i (1+ i))))) | |
768 | */ | |
769 | #define STATIC_OBJCODE_TAG \ | |
770 | SCM_PACK (scm_tc7_objcode | (SCM_F_OBJCODE_IS_STATIC << 8)) | |
771 | ||
772 | static const struct | |
773 | { | |
774 | scm_t_uint64 dummy; /* alignment */ | |
775 | scm_t_cell cells[10 * 2]; /* 10 double cells */ | |
776 | } objcode_cells = { | |
777 | 0, | |
778 | /* C-u 1 0 M-x generate-objcode-cells RET */ | |
779 | { | |
780 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 0) }, | |
781 | { SCM_BOOL_F, SCM_PACK (0) }, | |
782 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 56) }, | |
783 | { SCM_BOOL_F, SCM_PACK (0) }, | |
784 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 112) }, | |
785 | { SCM_BOOL_F, SCM_PACK (0) }, | |
786 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 168) }, | |
787 | { SCM_BOOL_F, SCM_PACK (0) }, | |
788 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 224) }, | |
789 | { SCM_BOOL_F, SCM_PACK (0) }, | |
790 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 280) }, | |
791 | { SCM_BOOL_F, SCM_PACK (0) }, | |
792 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 336) }, | |
793 | { SCM_BOOL_F, SCM_PACK (0) }, | |
794 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 392) }, | |
795 | { SCM_BOOL_F, SCM_PACK (0) }, | |
796 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 448) }, | |
797 | { SCM_BOOL_F, SCM_PACK (0) }, | |
798 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 504) }, | |
799 | { SCM_BOOL_F, SCM_PACK (0) } | |
800 | } | |
801 | }; | |
802 | ||
803 | static const SCM objcode_trampolines[10] = { | |
804 | SCM_PACK (objcode_cells.cells+0), | |
805 | SCM_PACK (objcode_cells.cells+2), | |
806 | SCM_PACK (objcode_cells.cells+4), | |
807 | SCM_PACK (objcode_cells.cells+6), | |
808 | SCM_PACK (objcode_cells.cells+8), | |
809 | SCM_PACK (objcode_cells.cells+10), | |
810 | SCM_PACK (objcode_cells.cells+12), | |
811 | SCM_PACK (objcode_cells.cells+14), | |
812 | SCM_PACK (objcode_cells.cells+16), | |
813 | SCM_PACK (objcode_cells.cells+18), | |
814 | }; | |
815 | ||
816 | static SCM | |
817 | cif_to_procedure (SCM cif, SCM func_ptr) | |
818 | { | |
819 | unsigned nargs = SCM_FOREIGN_POINTER (cif, ffi_cif)->nargs; | |
820 | SCM objcode, table, ret; | |
821 | ||
822 | if (nargs < 10) | |
823 | objcode = objcode_trampolines[nargs]; | |
824 | else | |
75383ddb AW |
825 | scm_misc_error ("make-foreign-function", "args >= 10 currently unimplemented", |
826 | SCM_EOL); | |
d8b04f04 AW |
827 | |
828 | table = scm_c_make_vector (2, SCM_UNDEFINED); | |
829 | SCM_SIMPLE_VECTOR_SET (table, 0, scm_cons (cif, func_ptr)); | |
830 | SCM_SIMPLE_VECTOR_SET (table, 1, SCM_BOOL_F); /* name */ | |
831 | ret = scm_make_program (objcode, table, SCM_BOOL_F); | |
832 | ||
833 | return ret; | |
834 | } | |
835 | ||
4d9130a5 AW |
836 | static void |
837 | unpack (ffi_type *type, void *loc, SCM x) | |
838 | { | |
839 | switch (type->type) | |
840 | { | |
841 | case FFI_TYPE_FLOAT: | |
842 | *(float*)loc = scm_to_double (x); | |
843 | break; | |
844 | case FFI_TYPE_DOUBLE: | |
845 | *(double*)loc = scm_to_double (x); | |
846 | break; | |
847 | case FFI_TYPE_UINT8: | |
848 | *(scm_t_uint8*)loc = scm_to_uint8 (x); | |
849 | break; | |
850 | case FFI_TYPE_SINT8: | |
851 | *(scm_t_int8*)loc = scm_to_int8 (x); | |
852 | break; | |
853 | case FFI_TYPE_UINT16: | |
854 | *(scm_t_uint16*)loc = scm_to_uint16 (x); | |
855 | break; | |
856 | case FFI_TYPE_SINT16: | |
857 | *(scm_t_int16*)loc = scm_to_int16 (x); | |
858 | break; | |
859 | case FFI_TYPE_UINT32: | |
860 | *(scm_t_uint32*)loc = scm_to_uint32 (x); | |
861 | break; | |
862 | case FFI_TYPE_SINT32: | |
863 | *(scm_t_int32*)loc = scm_to_int32 (x); | |
864 | break; | |
865 | case FFI_TYPE_UINT64: | |
866 | *(scm_t_uint64*)loc = scm_to_uint64 (x); | |
867 | break; | |
868 | case FFI_TYPE_SINT64: | |
869 | *(scm_t_int64*)loc = scm_to_int64 (x); | |
870 | break; | |
871 | case FFI_TYPE_STRUCT: | |
872 | if (!SCM_FOREIGN_TYPED_P (x, VOID)) | |
75383ddb AW |
873 | scm_wrong_type_arg_msg ("foreign-call", 0, x, |
874 | "foreign void pointer"); | |
4d9130a5 | 875 | if (SCM_FOREIGN_LEN (x) && SCM_FOREIGN_LEN (x) != type->size) |
75383ddb AW |
876 | scm_wrong_type_arg_msg ("foreign-call", 0, x, |
877 | "foreign void pointer of correct length"); | |
4d9130a5 AW |
878 | memcpy (loc, SCM_FOREIGN_POINTER (x, void), type->size); |
879 | break; | |
880 | case FFI_TYPE_POINTER: | |
881 | if (!SCM_FOREIGN_TYPED_P (x, VOID)) | |
75383ddb AW |
882 | scm_wrong_type_arg_msg ("foreign-call", 0, x, |
883 | "foreign void pointer"); | |
4d9130a5 AW |
884 | *(void**)loc = SCM_FOREIGN_POINTER (x, void); |
885 | break; | |
886 | default: | |
887 | abort (); | |
888 | } | |
889 | } | |
890 | ||
891 | static SCM | |
892 | pack (ffi_type *type, void *loc) | |
893 | { | |
894 | switch (type->type) | |
895 | { | |
896 | case FFI_TYPE_VOID: | |
897 | return SCM_UNSPECIFIED; | |
898 | case FFI_TYPE_FLOAT: | |
899 | return scm_from_double (*(float*)loc); | |
900 | case FFI_TYPE_DOUBLE: | |
901 | return scm_from_double (*(double*)loc); | |
902 | case FFI_TYPE_UINT8: | |
903 | return scm_from_uint8 (*(scm_t_uint8*)loc); | |
904 | case FFI_TYPE_SINT8: | |
905 | return scm_from_int8 (*(scm_t_int8*)loc); | |
906 | case FFI_TYPE_UINT16: | |
907 | return scm_from_uint16 (*(scm_t_uint16*)loc); | |
908 | case FFI_TYPE_SINT16: | |
909 | return scm_from_int16 (*(scm_t_int16*)loc); | |
910 | case FFI_TYPE_UINT32: | |
911 | return scm_from_uint32 (*(scm_t_uint32*)loc); | |
912 | case FFI_TYPE_SINT32: | |
913 | return scm_from_int32 (*(scm_t_int32*)loc); | |
914 | case FFI_TYPE_UINT64: | |
915 | return scm_from_uint64 (*(scm_t_uint64*)loc); | |
916 | case FFI_TYPE_SINT64: | |
917 | return scm_from_int64 (*(scm_t_int64*)loc); | |
918 | case FFI_TYPE_STRUCT: | |
919 | { | |
087aa6aa | 920 | void *mem = scm_gc_malloc_pointerless (type->size, "foreign"); |
4d9130a5 AW |
921 | memcpy (mem, loc, type->size); |
922 | return scm_take_foreign_pointer (SCM_FOREIGN_TYPE_VOID, | |
087aa6aa | 923 | mem, type->size, NULL); |
4d9130a5 AW |
924 | } |
925 | case FFI_TYPE_POINTER: | |
926 | return scm_take_foreign_pointer (SCM_FOREIGN_TYPE_VOID, | |
927 | *(void**)loc, 0, NULL); | |
928 | default: | |
929 | abort (); | |
930 | } | |
931 | } | |
932 | ||
933 | SCM | |
934 | scm_i_foreign_call (SCM foreign, SCM *argv) | |
935 | { | |
936 | /* FOREIGN is the pair that cif_to_procedure set as the 0th element of the | |
937 | objtable. */ | |
938 | ffi_cif *cif; | |
939 | void (*func)(); | |
940 | scm_t_uint8 *data; | |
941 | void *rvalue; | |
942 | void **args; | |
943 | unsigned i; | |
944 | scm_t_ptrdiff off; | |
945 | ||
946 | cif = SCM_FOREIGN_POINTER (scm_car (foreign), ffi_cif); | |
947 | func = SCM_FOREIGN_POINTER (scm_cdr (foreign), void); | |
d8b04f04 | 948 | |
4d9130a5 AW |
949 | /* arg pointers */ |
950 | args = alloca (sizeof(void*) * cif->nargs); | |
951 | /* arg values, then return type value */ | |
952 | data = alloca (ROUND_UP (cif->bytes, cif->rtype->alignment) | |
953 | + cif->rtype->size); | |
954 | /* unpack argv to native values, setting argv pointers */ | |
955 | off = 0; | |
956 | for (i = 0; i < cif->nargs; i++) | |
957 | { | |
958 | off = ROUND_UP (off, cif->arg_types[i]->alignment); | |
959 | args[i] = data + off; | |
960 | unpack (cif->arg_types[i], args[i], argv[i]); | |
961 | off += cif->arg_types[i]->size; | |
962 | } | |
963 | /* prep space for the return value */ | |
964 | off = ROUND_UP (off, cif->rtype->alignment); | |
965 | rvalue = data + off; | |
966 | ||
967 | /* off we go! */ | |
968 | ffi_call (cif, func, rvalue, args); | |
969 | ||
970 | return pack (cif->rtype, rvalue); | |
971 | } | |
972 | ||
d8b04f04 AW |
973 | \f |
974 | ||
ab4779ff | 975 | static void |
e2c2a699 AW |
976 | scm_init_foreign (void) |
977 | { | |
978 | #ifndef SCM_MAGIC_SNARFER | |
979 | #include "libguile/foreign.x" | |
980 | #endif | |
ab4779ff AW |
981 | scm_define (sym_void, scm_from_uint8 (SCM_FOREIGN_TYPE_VOID)); |
982 | scm_define (sym_float, scm_from_uint8 (SCM_FOREIGN_TYPE_FLOAT)); | |
983 | scm_define (sym_double, scm_from_uint8 (SCM_FOREIGN_TYPE_DOUBLE)); | |
984 | scm_define (sym_uint8, scm_from_uint8 (SCM_FOREIGN_TYPE_UINT8)); | |
985 | scm_define (sym_int8, scm_from_uint8 (SCM_FOREIGN_TYPE_INT8)); | |
986 | scm_define (sym_uint16, scm_from_uint8 (SCM_FOREIGN_TYPE_UINT16)); | |
987 | scm_define (sym_int16, scm_from_uint8 (SCM_FOREIGN_TYPE_INT16)); | |
988 | scm_define (sym_uint32, scm_from_uint8 (SCM_FOREIGN_TYPE_UINT32)); | |
989 | scm_define (sym_int32, scm_from_uint8 (SCM_FOREIGN_TYPE_INT32)); | |
990 | scm_define (sym_uint64, scm_from_uint8 (SCM_FOREIGN_TYPE_UINT64)); | |
991 | scm_define (sym_int64, scm_from_uint8 (SCM_FOREIGN_TYPE_INT64)); | |
dd1464bf LC |
992 | |
993 | scm_define (sym_int, | |
994 | #if SIZEOF_INT == 8 | |
995 | scm_from_uint8 (SCM_FOREIGN_TYPE_INT64) | |
996 | #elif SIZEOF_INT == 4 | |
997 | scm_from_uint8 (SCM_FOREIGN_TYPE_INT32) | |
998 | #else | |
999 | # error unsupported sizeof (int) | |
1000 | #endif | |
1001 | ); | |
1002 | ||
1003 | scm_define (sym_unsigned_int, | |
1004 | #if SIZEOF_UNSIGNED_INT == 8 | |
1005 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT64) | |
1006 | #elif SIZEOF_UNSIGNED_INT == 4 | |
1007 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT32) | |
1008 | #else | |
1009 | # error unsupported sizeof (unsigned int) | |
1010 | #endif | |
1011 | ); | |
1012 | ||
1013 | scm_define (sym_long, | |
1014 | #if SIZEOF_LONG == 8 | |
1015 | scm_from_uint8 (SCM_FOREIGN_TYPE_INT64) | |
1016 | #elif SIZEOF_LONG == 4 | |
1017 | scm_from_uint8 (SCM_FOREIGN_TYPE_INT32) | |
1018 | #else | |
1019 | # error unsupported sizeof (long) | |
1020 | #endif | |
1021 | ); | |
1022 | ||
1023 | scm_define (sym_unsigned_long, | |
1024 | #if SIZEOF_UNSIGNED_LONG == 8 | |
1025 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT64) | |
1026 | #elif SIZEOF_UNSIGNED_LONG == 4 | |
1027 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT32) | |
1028 | #else | |
1029 | # error unsupported sizeof (unsigned long) | |
1030 | #endif | |
1031 | ); | |
1032 | ||
1033 | scm_define (sym_size_t, | |
1034 | #if SIZEOF_SIZE_T == 8 | |
1035 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT64) | |
1036 | #elif SIZEOF_SIZE_T == 4 | |
1037 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT32) | |
1038 | #else | |
1039 | # error unsupported sizeof (size_t) | |
1040 | #endif | |
1041 | ); | |
ab4779ff AW |
1042 | } |
1043 | ||
1044 | void | |
1045 | scm_register_foreign (void) | |
1046 | { | |
44602b08 AW |
1047 | scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION, |
1048 | "scm_init_foreign", | |
ab4779ff AW |
1049 | (scm_t_extension_init_func)scm_init_foreign, |
1050 | NULL); | |
20aafae2 | 1051 | foreign_weak_refs = scm_make_weak_key_hash_table (SCM_UNDEFINED); |
e2c2a699 AW |
1052 | } |
1053 | ||
1054 | /* | |
1055 | Local Variables: | |
1056 | c-file-style: "gnu" | |
1057 | End: | |
1058 | */ |