Commit | Line | Data |
---|---|---|
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 | ||
54eb59cf LC |
54 | SCM_SYMBOL (sym_null, "%null-pointer"); |
55 | ||
56 | /* The cell representing the null pointer. */ | |
57 | static const scm_t_bits null_pointer[2] = | |
58 | { | |
59 | scm_tc7_foreign | (SCM_FOREIGN_TYPE_VOID << 8UL), | |
60 | 0 | |
61 | }; | |
3435f3c0 | 62 | |
d8b04f04 AW |
63 | static SCM cif_to_procedure (SCM cif, SCM func_ptr); |
64 | ||
65 | ||
20aafae2 AW |
66 | static SCM foreign_weak_refs = SCM_BOOL_F; |
67 | ||
68 | static void | |
69 | register_weak_reference (SCM from, SCM to) | |
70 | { | |
71 | scm_hashq_set_x (foreign_weak_refs, from, to); | |
72 | } | |
73 | ||
e2c2a699 AW |
74 | static void |
75 | foreign_finalizer_trampoline (GC_PTR ptr, GC_PTR data) | |
76 | { | |
77 | scm_t_foreign_finalizer finalizer = data; | |
52fd9639 | 78 | finalizer (SCM_FOREIGN_POINTER (PTR2SCM (ptr), void)); |
e2c2a699 AW |
79 | } |
80 | ||
81 | SCM | |
52fd9639 AW |
82 | scm_take_foreign_pointer (scm_t_foreign_type type, void *ptr, size_t len, |
83 | scm_t_foreign_finalizer finalizer) | |
e2c2a699 | 84 | { |
9fdee5b4 | 85 | SCM ret; |
52fd9639 | 86 | scm_t_bits word0; |
e2c2a699 | 87 | |
52fd9639 AW |
88 | word0 = (scm_t_bits)(scm_tc7_foreign | (type<<8) |
89 | | (finalizer ? (1<<16) : 0) | (len<<17)); | |
d8b04f04 | 90 | if (SCM_UNLIKELY ((word0 >> 17) != len)) |
52fd9639 AW |
91 | scm_out_of_range ("scm_take_foreign_pointer", scm_from_size_t (len)); |
92 | ||
93 | ret = PTR2SCM (scm_gc_malloc_pointerless (sizeof (scm_t_bits) * 2, | |
9fdee5b4 | 94 | "foreign")); |
52fd9639 AW |
95 | SCM_SET_CELL_WORD_0 (ret, word0); |
96 | SCM_SET_CELL_WORD_1 (ret, (scm_t_bits)ptr); | |
e2c2a699 AW |
97 | |
98 | if (finalizer) | |
99 | { | |
100 | /* Register a finalizer for the newly created instance. */ | |
101 | GC_finalization_proc prev_finalizer; | |
102 | GC_PTR prev_finalizer_data; | |
9fdee5b4 | 103 | GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (ret), |
e2c2a699 AW |
104 | foreign_finalizer_trampoline, |
105 | finalizer, | |
106 | &prev_finalizer, | |
107 | &prev_finalizer_data); | |
108 | } | |
109 | ||
9fdee5b4 | 110 | return ret; |
e2c2a699 AW |
111 | } |
112 | ||
20aafae2 AW |
113 | SCM_DEFINE (scm_foreign_ref, "foreign-ref", 1, 0, 0, |
114 | (SCM foreign), | |
e2c2a699 | 115 | "Reference the foreign value wrapped by @var{foreign}.\n\n" |
20aafae2 | 116 | "The value will be referenced according to its type.") |
e2c2a699 AW |
117 | #define FUNC_NAME s_scm_foreign_ref |
118 | { | |
52fd9639 AW |
119 | scm_t_foreign_type ftype; |
120 | scm_t_uint8 *ptr; | |
e2c2a699 | 121 | |
52fd9639 AW |
122 | SCM_VALIDATE_FOREIGN (1, foreign); |
123 | ptr = SCM_FOREIGN_POINTER (foreign, scm_t_uint8); | |
52fd9639 | 124 | ftype = SCM_FOREIGN_TYPE (foreign); |
52fd9639 AW |
125 | |
126 | /* FIXME: is there a window in which we can see ptr but not foreign? */ | |
20aafae2 | 127 | /* FIXME: accessing unaligned pointers */ |
52fd9639 | 128 | switch (ftype) |
e2c2a699 | 129 | { |
20aafae2 AW |
130 | case SCM_FOREIGN_TYPE_VOID: |
131 | return scm_from_ulong ((unsigned long)ptr); | |
e2c2a699 | 132 | case SCM_FOREIGN_TYPE_FLOAT: |
52fd9639 | 133 | return scm_from_double (*(float*)ptr); |
e2c2a699 | 134 | case SCM_FOREIGN_TYPE_DOUBLE: |
52fd9639 | 135 | return scm_from_double (*(double*)ptr); |
e2c2a699 | 136 | case SCM_FOREIGN_TYPE_UINT8: |
52fd9639 | 137 | return scm_from_uint8 (*(scm_t_uint8*)ptr); |
e2c2a699 | 138 | case SCM_FOREIGN_TYPE_INT8: |
52fd9639 | 139 | return scm_from_int8 (*(scm_t_int8*)ptr); |
e2c2a699 | 140 | case SCM_FOREIGN_TYPE_UINT16: |
52fd9639 | 141 | return scm_from_uint16 (*(scm_t_uint16*)ptr); |
e2c2a699 | 142 | case SCM_FOREIGN_TYPE_INT16: |
52fd9639 | 143 | return scm_from_int16 (*(scm_t_int16*)ptr); |
e2c2a699 | 144 | case SCM_FOREIGN_TYPE_UINT32: |
52fd9639 | 145 | return scm_from_uint32 (*(scm_t_uint32*)ptr); |
e2c2a699 | 146 | case SCM_FOREIGN_TYPE_INT32: |
52fd9639 | 147 | return scm_from_int32 (*(scm_t_int32*)ptr); |
e2c2a699 | 148 | case SCM_FOREIGN_TYPE_UINT64: |
52fd9639 | 149 | return scm_from_uint64 (*(scm_t_uint64*)ptr); |
e2c2a699 | 150 | case SCM_FOREIGN_TYPE_INT64: |
52fd9639 | 151 | return scm_from_int64 (*(scm_t_int64*)ptr); |
e2c2a699 | 152 | default: |
75383ddb | 153 | scm_wrong_type_arg_msg (FUNC_NAME, 1, foreign, "foreign"); |
e2c2a699 AW |
154 | } |
155 | } | |
156 | #undef FUNC_NAME | |
157 | ||
20aafae2 AW |
158 | SCM_DEFINE (scm_foreign_set_x, "foreign-set!", 2, 0, 0, |
159 | (SCM foreign, SCM val), | |
e2c2a699 | 160 | "Set the foreign value wrapped by @var{foreign}.\n\n" |
20aafae2 | 161 | "The value will be set according to its type.") |
e2c2a699 AW |
162 | #define FUNC_NAME s_scm_foreign_set_x |
163 | { | |
52fd9639 AW |
164 | scm_t_foreign_type ftype; |
165 | scm_t_uint8 *ptr; | |
e2c2a699 | 166 | |
52fd9639 AW |
167 | SCM_VALIDATE_FOREIGN (1, foreign); |
168 | ptr = SCM_FOREIGN_POINTER (foreign, scm_t_uint8); | |
52fd9639 | 169 | ftype = SCM_FOREIGN_TYPE (foreign); |
20aafae2 | 170 | |
52fd9639 | 171 | /* FIXME: is there a window in which we can see ptr but not foreign? */ |
20aafae2 | 172 | /* FIXME: unaligned access */ |
52fd9639 | 173 | switch (ftype) |
e2c2a699 | 174 | { |
20aafae2 AW |
175 | case SCM_FOREIGN_TYPE_VOID: |
176 | SCM_SET_CELL_WORD_1 (foreign, scm_to_ulong (val)); | |
177 | break; | |
e2c2a699 | 178 | case SCM_FOREIGN_TYPE_FLOAT: |
52fd9639 | 179 | *(float*)ptr = scm_to_double (val); |
e2c2a699 AW |
180 | break; |
181 | case SCM_FOREIGN_TYPE_DOUBLE: | |
52fd9639 | 182 | *(double*)ptr = scm_to_double (val); |
e2c2a699 AW |
183 | break; |
184 | case SCM_FOREIGN_TYPE_UINT8: | |
52fd9639 | 185 | *(scm_t_uint8*)ptr = scm_to_uint8 (val); |
e2c2a699 AW |
186 | break; |
187 | case SCM_FOREIGN_TYPE_INT8: | |
52fd9639 | 188 | *(scm_t_int8*)ptr = scm_to_int8 (val); |
e2c2a699 AW |
189 | break; |
190 | case SCM_FOREIGN_TYPE_UINT16: | |
52fd9639 | 191 | *(scm_t_uint16*)ptr = scm_to_uint16 (val); |
e2c2a699 AW |
192 | break; |
193 | case SCM_FOREIGN_TYPE_INT16: | |
52fd9639 | 194 | *(scm_t_int16*)ptr = scm_to_int16 (val); |
e2c2a699 AW |
195 | break; |
196 | case SCM_FOREIGN_TYPE_UINT32: | |
52fd9639 | 197 | *(scm_t_uint32*)ptr = scm_to_uint32 (val); |
e2c2a699 AW |
198 | break; |
199 | case SCM_FOREIGN_TYPE_INT32: | |
52fd9639 | 200 | *(scm_t_int32*)ptr = scm_to_int32 (val); |
e2c2a699 AW |
201 | break; |
202 | case SCM_FOREIGN_TYPE_UINT64: | |
52fd9639 | 203 | *(scm_t_uint64*)ptr = scm_to_uint64 (val); |
e2c2a699 AW |
204 | break; |
205 | case SCM_FOREIGN_TYPE_INT64: | |
52fd9639 | 206 | *(scm_t_int64*)ptr = scm_to_int64 (val); |
e2c2a699 | 207 | break; |
e2c2a699 | 208 | default: |
75383ddb | 209 | scm_wrong_type_arg_msg (FUNC_NAME, 1, val, "foreign"); |
e2c2a699 | 210 | } |
52fd9639 | 211 | |
e2c2a699 AW |
212 | return SCM_UNSPECIFIED; |
213 | } | |
214 | #undef FUNC_NAME | |
215 | ||
20aafae2 AW |
216 | SCM_DEFINE (scm_foreign_to_bytevector, "foreign->bytevector", 1, 3, 0, |
217 | (SCM foreign, SCM uvec_type, SCM offset, SCM len), | |
218 | "Return a bytevector aliasing the memory pointed to by\n" | |
219 | "@var{foreign}.\n\n" | |
220 | "@var{foreign} must be a void pointer, a foreign whose type is\n" | |
221 | "@var{void}. By default, the resulting bytevector will alias\n" | |
222 | "all of the memory pointed to by @var{foreign}, from beginning\n" | |
223 | "to end, treated as a @code{vu8} array.\n\n" | |
224 | "The user may specify an alternate default interpretation for\n" | |
225 | "the memory by passing the @var{uvec_type} argument, to indicate\n" | |
226 | "that the memory is an array of elements of that type.\n" | |
227 | "@var{uvec_type} should be something that\n" | |
228 | "@code{uniform-vector-element-type} would return, like @code{f32}\n" | |
229 | "or @code{s16}.\n\n" | |
230 | "Users may also specify that the bytevector should only alias a\n" | |
231 | "subset of the memory, by specifying @var{offset} and @var{len}\n" | |
232 | "arguments.") | |
233 | #define FUNC_NAME s_scm_foreign_to_bytevector | |
234 | { | |
235 | SCM ret; | |
236 | scm_t_int8 *ptr; | |
237 | size_t boffset, blen; | |
238 | scm_t_array_element_type btype; | |
239 | ||
240 | SCM_VALIDATE_FOREIGN_TYPED (1, foreign, VOID); | |
241 | ptr = SCM_FOREIGN_POINTER (foreign, scm_t_int8); | |
54eb59cf LC |
242 | |
243 | if (SCM_UNLIKELY (ptr == NULL)) | |
244 | scm_misc_error (FUNC_NAME, "null pointer dereference", SCM_EOL); | |
245 | ||
20aafae2 AW |
246 | if (SCM_UNBNDP (uvec_type)) |
247 | btype = SCM_ARRAY_ELEMENT_TYPE_VU8; | |
248 | else | |
249 | { | |
250 | int i; | |
251 | for (i = 0; i <= SCM_ARRAY_ELEMENT_TYPE_LAST; i++) | |
252 | if (scm_is_eq (uvec_type, scm_i_array_element_types[i])) | |
253 | break; | |
254 | switch (i) | |
255 | { | |
256 | case SCM_ARRAY_ELEMENT_TYPE_VU8: | |
257 | case SCM_ARRAY_ELEMENT_TYPE_U8: | |
258 | case SCM_ARRAY_ELEMENT_TYPE_S8: | |
259 | case SCM_ARRAY_ELEMENT_TYPE_U16: | |
260 | case SCM_ARRAY_ELEMENT_TYPE_S16: | |
261 | case SCM_ARRAY_ELEMENT_TYPE_U32: | |
262 | case SCM_ARRAY_ELEMENT_TYPE_S32: | |
263 | case SCM_ARRAY_ELEMENT_TYPE_U64: | |
264 | case SCM_ARRAY_ELEMENT_TYPE_S64: | |
265 | case SCM_ARRAY_ELEMENT_TYPE_F32: | |
266 | case SCM_ARRAY_ELEMENT_TYPE_F64: | |
267 | case SCM_ARRAY_ELEMENT_TYPE_C32: | |
268 | case SCM_ARRAY_ELEMENT_TYPE_C64: | |
269 | btype = i; | |
270 | break; | |
271 | default: | |
272 | scm_wrong_type_arg_msg (FUNC_NAME, SCM_ARG1, uvec_type, | |
273 | "uniform vector type"); | |
274 | } | |
275 | } | |
276 | ||
277 | if (SCM_UNBNDP (offset)) | |
278 | boffset = 0; | |
279 | else if (SCM_FOREIGN_LEN (foreign)) | |
280 | boffset = scm_to_unsigned_integer (offset, 0, | |
281 | SCM_FOREIGN_LEN (foreign) - 1); | |
282 | else | |
283 | boffset = scm_to_size_t (offset); | |
284 | ||
285 | if (SCM_UNBNDP (len)) | |
286 | { | |
287 | if (SCM_FOREIGN_LEN (foreign)) | |
288 | blen = SCM_FOREIGN_LEN (foreign) - boffset; | |
289 | else | |
290 | scm_misc_error (FUNC_NAME, | |
291 | "length needed to convert foreign pointer to bytevector", | |
292 | SCM_EOL); | |
293 | } | |
294 | else | |
295 | { | |
296 | if (SCM_FOREIGN_LEN (foreign)) | |
297 | blen = scm_to_unsigned_integer (len, 0, | |
298 | SCM_FOREIGN_LEN (foreign) - boffset); | |
299 | else | |
300 | blen = scm_to_size_t (len); | |
301 | } | |
302 | ||
303 | ret = scm_c_take_typed_bytevector (ptr + boffset, blen, btype); | |
304 | register_weak_reference (ret, foreign); | |
305 | return ret; | |
306 | } | |
307 | #undef FUNC_NAME | |
308 | ||
309 | SCM_DEFINE (scm_bytevector_to_foreign, "bytevector->foreign", 1, 2, 0, | |
310 | (SCM bv, SCM offset, SCM len), | |
311 | "Return a foreign pointer aliasing the memory pointed to by\n" | |
312 | "@var{bv}.\n\n" | |
313 | "The resulting foreign will be a void pointer, a foreign whose\n" | |
314 | "type is @code{void}. By default it will alias all of the\n" | |
315 | "memory pointed to by @var{bv}, from beginning to end.\n\n" | |
316 | "Users may explicily specify that the foreign should only alias a\n" | |
317 | "subset of the memory, by specifying @var{offset} and @var{len}\n" | |
318 | "arguments.") | |
319 | #define FUNC_NAME s_scm_bytevector_to_foreign | |
320 | { | |
321 | SCM ret; | |
322 | scm_t_int8 *ptr; | |
323 | size_t boffset, blen; | |
324 | ||
325 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
326 | ptr = SCM_BYTEVECTOR_CONTENTS (bv); | |
327 | ||
328 | if (SCM_UNBNDP (offset)) | |
329 | boffset = 0; | |
330 | else | |
331 | boffset = scm_to_unsigned_integer (offset, 0, | |
332 | SCM_BYTEVECTOR_LENGTH (bv) - 1); | |
333 | ||
334 | if (SCM_UNBNDP (len)) | |
335 | blen = SCM_BYTEVECTOR_LENGTH (bv) - boffset; | |
336 | else | |
337 | blen = scm_to_unsigned_integer (len, 0, | |
338 | SCM_BYTEVECTOR_LENGTH (bv) - boffset); | |
339 | ||
340 | ret = scm_take_foreign_pointer (SCM_FOREIGN_TYPE_VOID, ptr + boffset, blen, | |
341 | NULL); | |
342 | register_weak_reference (ret, bv); | |
343 | return ret; | |
344 | } | |
345 | #undef FUNC_NAME | |
346 | ||
3435f3c0 AW |
347 | SCM_DEFINE (scm_foreign_set_finalizer_x, "foreign-set-finalizer!", 2, 0, 0, |
348 | (SCM foreign, SCM finalizer), | |
349 | "Arrange for the C procedure wrapped by @var{finalizer} to be\n" | |
350 | "called on the pointer wrapped by @var{foreign} when @var{foreign}\n" | |
351 | "becomes unreachable. Note: the C procedure should not call into\n" | |
352 | "Scheme. If you need a Scheme finalizer, use guardians.") | |
353 | #define FUNC_NAME s_scm_foreign_set_finalizer_x | |
354 | { | |
355 | void *c_finalizer; | |
356 | GC_finalization_proc prev_finalizer; | |
357 | GC_PTR prev_finalizer_data; | |
358 | ||
359 | SCM_VALIDATE_FOREIGN_TYPED (1, foreign, VOID); | |
360 | SCM_VALIDATE_FOREIGN_TYPED (2, finalizer, VOID); | |
361 | ||
362 | c_finalizer = SCM_FOREIGN_POINTER (finalizer, void); | |
363 | ||
364 | SCM_SET_CELL_WORD_0 (foreign, SCM_CELL_WORD_0 (foreign) | (1<<16)); | |
365 | ||
366 | GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (foreign), | |
367 | foreign_finalizer_trampoline, | |
368 | c_finalizer, | |
369 | &prev_finalizer, | |
370 | &prev_finalizer_data); | |
371 | ||
372 | return SCM_UNSPECIFIED; | |
373 | } | |
374 | #undef FUNC_NAME | |
375 | ||
376 | \f | |
377 | ||
e2c2a699 AW |
378 | void |
379 | scm_i_foreign_print (SCM foreign, SCM port, scm_print_state *pstate) | |
380 | { | |
381 | scm_puts ("#<foreign ", port); | |
382 | switch (SCM_FOREIGN_TYPE (foreign)) | |
383 | { | |
e2c2a699 AW |
384 | case SCM_FOREIGN_TYPE_FLOAT: |
385 | scm_puts ("float ", port); | |
e2c2a699 AW |
386 | break; |
387 | case SCM_FOREIGN_TYPE_DOUBLE: | |
388 | scm_puts ("double ", port); | |
e2c2a699 AW |
389 | break; |
390 | case SCM_FOREIGN_TYPE_UINT8: | |
391 | scm_puts ("uint8 ", port); | |
e2c2a699 AW |
392 | break; |
393 | case SCM_FOREIGN_TYPE_INT8: | |
394 | scm_puts ("int8 ", port); | |
e2c2a699 AW |
395 | break; |
396 | case SCM_FOREIGN_TYPE_UINT16: | |
397 | scm_puts ("uint16 ", port); | |
e2c2a699 AW |
398 | break; |
399 | case SCM_FOREIGN_TYPE_INT16: | |
400 | scm_puts ("int16 ", port); | |
e2c2a699 AW |
401 | break; |
402 | case SCM_FOREIGN_TYPE_UINT32: | |
403 | scm_puts ("uint32 ", port); | |
e2c2a699 AW |
404 | break; |
405 | case SCM_FOREIGN_TYPE_INT32: | |
406 | scm_puts ("int32 ", port); | |
e2c2a699 AW |
407 | break; |
408 | case SCM_FOREIGN_TYPE_UINT64: | |
409 | scm_puts ("uint64 ", port); | |
e2c2a699 AW |
410 | break; |
411 | case SCM_FOREIGN_TYPE_INT64: | |
412 | scm_puts ("int64 ", port); | |
e2c2a699 | 413 | break; |
52fd9639 | 414 | case SCM_FOREIGN_TYPE_VOID: |
20aafae2 | 415 | scm_puts ("pointer ", port); |
e2c2a699 AW |
416 | break; |
417 | default: | |
75383ddb | 418 | scm_wrong_type_arg_msg ("%print-foreign", 1, foreign, "foreign"); |
e2c2a699 | 419 | } |
20aafae2 | 420 | scm_display (scm_foreign_ref (foreign), port); |
e2c2a699 AW |
421 | scm_putc ('>', port); |
422 | } | |
423 | ||
424 | \f | |
425 | ||
9a396cbd | 426 | |
d8b04f04 AW |
427 | #define ROUND_UP(len,align) (align?(((len-1)|(align-1))+1):len) |
428 | ||
9a396cbd AW |
429 | SCM_DEFINE (scm_alignof, "alignof", 1, 0, 0, (SCM type), "") |
430 | #define FUNC_NAME s_scm_alignof | |
431 | { | |
432 | if (SCM_I_INUMP (type)) | |
433 | { | |
434 | switch (SCM_I_INUM (type)) | |
435 | { | |
436 | case SCM_FOREIGN_TYPE_FLOAT: | |
437 | return scm_from_size_t (alignof (float)); | |
438 | case SCM_FOREIGN_TYPE_DOUBLE: | |
439 | return scm_from_size_t (alignof (double)); | |
440 | case SCM_FOREIGN_TYPE_UINT8: | |
441 | return scm_from_size_t (alignof (scm_t_uint8)); | |
442 | case SCM_FOREIGN_TYPE_INT8: | |
443 | return scm_from_size_t (alignof (scm_t_int8)); | |
444 | case SCM_FOREIGN_TYPE_UINT16: | |
445 | return scm_from_size_t (alignof (scm_t_uint16)); | |
446 | case SCM_FOREIGN_TYPE_INT16: | |
447 | return scm_from_size_t (alignof (scm_t_int16)); | |
448 | case SCM_FOREIGN_TYPE_UINT32: | |
449 | return scm_from_size_t (alignof (scm_t_uint32)); | |
450 | case SCM_FOREIGN_TYPE_INT32: | |
451 | return scm_from_size_t (alignof (scm_t_int32)); | |
452 | case SCM_FOREIGN_TYPE_UINT64: | |
453 | return scm_from_size_t (alignof (scm_t_uint64)); | |
454 | case SCM_FOREIGN_TYPE_INT64: | |
455 | return scm_from_size_t (alignof (scm_t_int64)); | |
456 | default: | |
457 | scm_wrong_type_arg (FUNC_NAME, 1, type); | |
458 | } | |
459 | } | |
3435f3c0 AW |
460 | else if (scm_is_eq (type, sym_asterisk)) |
461 | /* a pointer */ | |
462 | return scm_from_size_t (alignof (void*)); | |
9a396cbd AW |
463 | else if (scm_is_pair (type)) |
464 | /* a struct, yo */ | |
465 | return scm_alignof (scm_car (type)); | |
466 | else | |
467 | scm_wrong_type_arg (FUNC_NAME, 1, type); | |
468 | } | |
469 | #undef FUNC_NAME | |
470 | ||
471 | SCM_DEFINE (scm_sizeof, "sizeof", 1, 0, 0, (SCM type), "") | |
472 | #define FUNC_NAME s_scm_sizeof | |
473 | { | |
474 | if (SCM_I_INUMP (type)) | |
475 | { | |
476 | switch (SCM_I_INUM (type)) | |
477 | { | |
478 | case SCM_FOREIGN_TYPE_FLOAT: | |
479 | return scm_from_size_t (sizeof (float)); | |
480 | case SCM_FOREIGN_TYPE_DOUBLE: | |
481 | return scm_from_size_t (sizeof (double)); | |
482 | case SCM_FOREIGN_TYPE_UINT8: | |
483 | return scm_from_size_t (sizeof (scm_t_uint8)); | |
484 | case SCM_FOREIGN_TYPE_INT8: | |
485 | return scm_from_size_t (sizeof (scm_t_int8)); | |
486 | case SCM_FOREIGN_TYPE_UINT16: | |
487 | return scm_from_size_t (sizeof (scm_t_uint16)); | |
488 | case SCM_FOREIGN_TYPE_INT16: | |
489 | return scm_from_size_t (sizeof (scm_t_int16)); | |
490 | case SCM_FOREIGN_TYPE_UINT32: | |
491 | return scm_from_size_t (sizeof (scm_t_uint32)); | |
492 | case SCM_FOREIGN_TYPE_INT32: | |
493 | return scm_from_size_t (sizeof (scm_t_int32)); | |
494 | case SCM_FOREIGN_TYPE_UINT64: | |
495 | return scm_from_size_t (sizeof (scm_t_uint64)); | |
496 | case SCM_FOREIGN_TYPE_INT64: | |
497 | return scm_from_size_t (sizeof (scm_t_int64)); | |
498 | default: | |
499 | scm_wrong_type_arg (FUNC_NAME, 1, type); | |
500 | } | |
501 | } | |
3435f3c0 AW |
502 | else if (scm_is_eq (type, sym_asterisk)) |
503 | /* a pointer */ | |
504 | return scm_from_size_t (sizeof (void*)); | |
9a396cbd AW |
505 | else if (scm_is_pair (type)) |
506 | { | |
507 | /* a struct */ | |
508 | size_t off = 0; | |
509 | while (scm_is_pair (type)) | |
510 | { | |
511 | off = ROUND_UP (off, scm_to_size_t (scm_alignof (scm_car (type)))); | |
512 | off += scm_to_size_t (scm_sizeof (scm_car (type))); | |
513 | type = scm_cdr (type); | |
514 | } | |
515 | return scm_from_size_t (off); | |
516 | } | |
517 | else | |
518 | scm_wrong_type_arg (FUNC_NAME, 1, type); | |
519 | } | |
520 | #undef FUNC_NAME | |
521 | ||
522 | ||
d8b04f04 AW |
523 | /* return 1 on success, 0 on failure */ |
524 | static int | |
525 | parse_ffi_type (SCM type, int return_p, long *n_structs, long *n_struct_elts) | |
526 | { | |
527 | if (SCM_I_INUMP (type)) | |
528 | { | |
529 | if ((SCM_I_INUM (type) < 0 ) | |
530 | || (SCM_I_INUM (type) > SCM_FOREIGN_TYPE_LAST)) | |
531 | return 0; | |
532 | else if (SCM_I_INUM (type) == SCM_FOREIGN_TYPE_VOID && !return_p) | |
533 | return 0; | |
534 | else | |
535 | return 1; | |
536 | } | |
3435f3c0 AW |
537 | else if (scm_is_eq (type, sym_asterisk)) |
538 | /* a pointer */ | |
539 | return 1; | |
d8b04f04 AW |
540 | else |
541 | { | |
542 | long len; | |
543 | ||
544 | len = scm_ilength (type); | |
545 | if (len < 1) | |
546 | return 0; | |
547 | while (len--) | |
548 | { | |
549 | if (!parse_ffi_type (scm_car (type), 0, n_structs, n_struct_elts)) | |
550 | return 0; | |
551 | (*n_struct_elts)++; | |
552 | type = scm_cdr (type); | |
553 | } | |
554 | (*n_structs)++; | |
555 | return 1; | |
556 | } | |
557 | } | |
558 | ||
559 | static void | |
560 | fill_ffi_type (SCM type, ffi_type *ftype, ffi_type ***type_ptrs, | |
561 | ffi_type **types) | |
562 | { | |
563 | if (SCM_I_INUMP (type)) | |
564 | { | |
565 | switch (SCM_I_INUM (type)) | |
566 | { | |
567 | case SCM_FOREIGN_TYPE_FLOAT: | |
568 | *ftype = ffi_type_float; | |
569 | return; | |
570 | case SCM_FOREIGN_TYPE_DOUBLE: | |
571 | *ftype = ffi_type_double; | |
572 | return; | |
573 | case SCM_FOREIGN_TYPE_UINT8: | |
574 | *ftype = ffi_type_uint8; | |
575 | return; | |
576 | case SCM_FOREIGN_TYPE_INT8: | |
577 | *ftype = ffi_type_sint8; | |
578 | return; | |
579 | case SCM_FOREIGN_TYPE_UINT16: | |
580 | *ftype = ffi_type_uint16; | |
581 | return; | |
582 | case SCM_FOREIGN_TYPE_INT16: | |
583 | *ftype = ffi_type_sint16; | |
584 | return; | |
585 | case SCM_FOREIGN_TYPE_UINT32: | |
586 | *ftype = ffi_type_uint32; | |
587 | return; | |
588 | case SCM_FOREIGN_TYPE_INT32: | |
589 | *ftype = ffi_type_sint32; | |
590 | return; | |
591 | case SCM_FOREIGN_TYPE_UINT64: | |
592 | *ftype = ffi_type_uint64; | |
593 | return; | |
594 | case SCM_FOREIGN_TYPE_INT64: | |
595 | *ftype = ffi_type_sint64; | |
596 | return; | |
597 | case SCM_FOREIGN_TYPE_VOID: | |
598 | *ftype = ffi_type_void; | |
599 | return; | |
600 | default: | |
75383ddb AW |
601 | scm_wrong_type_arg_msg ("make-foreign-function", 0, type, |
602 | "foreign type"); | |
d8b04f04 AW |
603 | } |
604 | } | |
3435f3c0 AW |
605 | else if (scm_is_eq (type, sym_asterisk)) |
606 | /* a pointer */ | |
607 | { | |
608 | *ftype = ffi_type_pointer; | |
609 | return; | |
610 | } | |
d8b04f04 AW |
611 | else |
612 | { | |
613 | long i, len; | |
614 | ||
615 | len = scm_ilength (type); | |
616 | ||
617 | ftype->size = 0; | |
618 | ftype->alignment = 0; | |
619 | ftype->type = FFI_TYPE_STRUCT; | |
620 | ftype->elements = *type_ptrs; | |
621 | *type_ptrs += len + 1; | |
622 | ||
623 | for (i = 0; i < len; i++) | |
624 | { | |
9a396cbd AW |
625 | ftype->elements[i] = *types; |
626 | *types += 1; | |
d8b04f04 AW |
627 | fill_ffi_type (scm_car (type), ftype->elements[i], |
628 | type_ptrs, types); | |
629 | type = scm_cdr (type); | |
630 | } | |
631 | ftype->elements[i] = NULL; | |
632 | } | |
633 | } | |
634 | ||
635 | SCM_DEFINE (scm_make_foreign_function, "make-foreign-function", 3, 0, 0, | |
636 | (SCM return_type, SCM func_ptr, SCM arg_types), | |
71725997 AW |
637 | "Make a foreign function.\n\n" |
638 | "Given the foreign void pointer @var{func_ptr}, its argument and\n" | |
639 | "return types @var{arg_types} and @var{return_type}, return a\n" | |
640 | "procedure that will pass arguments to the foreign function\n" | |
641 | "and return appropriate values.\n\n" | |
642 | "@var{arg_types} should be a list of foreign types.\n" | |
643 | "@code{return_type} should be a foreign type.") | |
d8b04f04 AW |
644 | #define FUNC_NAME s_scm_make_foreign_function |
645 | { | |
646 | SCM walk, scm_cif; | |
647 | long i, nargs, n_structs, n_struct_elts; | |
648 | size_t cif_len; | |
649 | char *mem; | |
650 | ffi_cif *cif; | |
651 | ffi_type **type_ptrs; | |
652 | ffi_type *types; | |
653 | ||
654 | SCM_VALIDATE_FOREIGN_TYPED (2, func_ptr, VOID); | |
655 | nargs = scm_ilength (arg_types); | |
656 | SCM_ASSERT (nargs >= 0, arg_types, 3, FUNC_NAME); | |
657 | /* fixme: assert nargs < 1<<32 */ | |
658 | n_structs = n_struct_elts = 0; | |
659 | ||
660 | /* For want of talloc, we're going to have to do this in two passes: first we | |
661 | figure out how much memory is needed for all types, then we allocate the | |
662 | cif and the types all in one block. */ | |
663 | if (!parse_ffi_type (return_type, 1, &n_structs, &n_struct_elts)) | |
664 | scm_wrong_type_arg (FUNC_NAME, 1, return_type); | |
665 | for (walk = arg_types; scm_is_pair (walk); walk = scm_cdr (walk)) | |
666 | if (!parse_ffi_type (scm_car (walk), 0, &n_structs, &n_struct_elts)) | |
667 | scm_wrong_type_arg (FUNC_NAME, 3, scm_car (walk)); | |
668 | ||
669 | /* the memory: with space for the cif itself */ | |
670 | cif_len = sizeof (ffi_cif); | |
671 | ||
672 | /* then ffi_type pointers: one for each arg, one for each struct | |
673 | element, and one for each struct (for null-termination) */ | |
674 | cif_len = (ROUND_UP (cif_len, alignof(void*)) | |
675 | + (nargs + n_structs + n_struct_elts)*sizeof(void*)); | |
676 | ||
677 | /* then the ffi_type structs themselves, one per arg and struct element, and | |
678 | one for the return val */ | |
679 | cif_len = (ROUND_UP (cif_len, alignof(ffi_type)) | |
680 | + (nargs + n_struct_elts + 1)*sizeof(ffi_type)); | |
087aa6aa LC |
681 | |
682 | mem = scm_gc_malloc_pointerless (cif_len, "foreign"); | |
683 | scm_cif = scm_take_foreign_pointer (SCM_FOREIGN_TYPE_VOID, mem, | |
684 | cif_len, NULL); | |
685 | cif = (ffi_cif *) mem; | |
686 | ||
d8b04f04 AW |
687 | /* reuse cif_len to walk through the mem */ |
688 | cif_len = ROUND_UP (sizeof (ffi_cif), alignof(void*)); | |
689 | type_ptrs = (ffi_type**)(mem + cif_len); | |
690 | cif_len = ROUND_UP (cif_len | |
691 | + (nargs + n_structs + n_struct_elts)*sizeof(void*), | |
692 | alignof(ffi_type)); | |
693 | types = (ffi_type*)(mem + cif_len); | |
694 | ||
695 | /* whew. now knit the pointers together. */ | |
696 | cif->rtype = types++; | |
697 | fill_ffi_type (return_type, cif->rtype, &type_ptrs, &types); | |
698 | cif->arg_types = type_ptrs; | |
699 | type_ptrs += nargs; | |
700 | for (walk = arg_types, i = 0; scm_is_pair (walk); walk = scm_cdr (walk), i++) | |
701 | { | |
702 | cif->arg_types[i] = types++; | |
703 | fill_ffi_type (scm_car (walk), cif->arg_types[i], &type_ptrs, &types); | |
704 | } | |
705 | ||
706 | /* round out the cif, and we're done. */ | |
707 | cif->abi = FFI_DEFAULT_ABI; | |
708 | cif->nargs = nargs; | |
709 | cif->bytes = 0; | |
710 | cif->flags = 0; | |
711 | ||
712 | if (FFI_OK != ffi_prep_cif (cif, FFI_DEFAULT_ABI, cif->nargs, cif->rtype, | |
713 | cif->arg_types)) | |
714 | scm_misc_error (FUNC_NAME, "ffi_prep_cif failed", SCM_EOL); | |
715 | ||
716 | return cif_to_procedure (scm_cif, func_ptr); | |
717 | } | |
718 | #undef FUNC_NAME | |
719 | ||
720 | \f | |
721 | ||
722 | /* Pre-generate trampolines for less than 10 arguments. */ | |
723 | ||
724 | #ifdef WORDS_BIGENDIAN | |
725 | #define OBJCODE_HEADER 0, 0, 0, 8, 0, 0, 0, 40 | |
726 | #define META_HEADER 0, 0, 0, 32, 0, 0, 0, 0 | |
727 | #else | |
728 | #define OBJCODE_HEADER 8, 0, 0, 0, 40, 0, 0, 0 | |
729 | #define META_HEADER 32, 0, 0, 0, 0, 0, 0, 0 | |
730 | #endif | |
731 | ||
732 | #define CODE(nreq) \ | |
733 | OBJCODE_HEADER, \ | |
734 | /* 0 */ scm_op_assert_nargs_ee, 0, nreq, /* assert number of args */ \ | |
735 | /* 3 */ scm_op_object_ref, 0, /* push the pair with the cif and the function pointer */ \ | |
736 | /* 5 */ scm_op_foreign_call, nreq, /* and call (will return value as well) */ \ | |
737 | /* 7 */ scm_op_nop, \ | |
738 | /* 8 */ META (3, 7, nreq) | |
739 | ||
740 | #define META(start, end, nreq) \ | |
741 | META_HEADER, \ | |
742 | /* 0 */ scm_op_make_eol, /* bindings */ \ | |
743 | /* 1 */ scm_op_make_eol, /* sources */ \ | |
744 | /* 2 */ scm_op_make_int8, start, scm_op_make_int8, end, /* arity: from ip N to ip N */ \ | |
745 | /* 6 */ scm_op_make_int8, nreq, /* the arity is N required args */ \ | |
746 | /* 8 */ scm_op_list, 0, 3, /* make a list of those 3 vals */ \ | |
747 | /* 11 */ scm_op_list, 0, 1, /* and the arities will be a list of that one list */ \ | |
748 | /* 14 */ scm_op_load_symbol, 0, 0, 4, 'n', 'a', 'm', 'e', /* `name' */ \ | |
749 | /* 22 */ scm_op_object_ref, 1, /* the name from the object table */ \ | |
750 | /* 24 */ scm_op_cons, /* make a pair for the properties */ \ | |
751 | /* 25 */ scm_op_list, 0, 4, /* pack bindings, sources, and arities into list */ \ | |
752 | /* 28 */ scm_op_return, /* and return */ \ | |
753 | /* 29 */ scm_op_nop, scm_op_nop, scm_op_nop \ | |
754 | /* 32 */ | |
755 | ||
756 | static const struct | |
757 | { | |
758 | scm_t_uint64 dummy; /* ensure 8-byte alignment; perhaps there's a better way */ | |
759 | const scm_t_uint8 bytes[10 * (sizeof (struct scm_objcode) + 8 | |
760 | + sizeof (struct scm_objcode) + 32)]; | |
761 | } raw_bytecode = { | |
762 | 0, | |
763 | { | |
764 | CODE (0), CODE (1), CODE (2), CODE (3), CODE (4), | |
765 | CODE (5), CODE (6), CODE (7), CODE (8), CODE (9) | |
766 | } | |
767 | }; | |
768 | ||
769 | #undef CODE | |
770 | #undef META | |
771 | #undef OBJCODE_HEADER | |
772 | #undef META_HEADER | |
773 | ||
774 | /* | |
775 | (defun generate-objcode-cells (n) | |
776 | "Generate objcode cells for up to N arguments" | |
777 | (interactive "p") | |
778 | (let ((i 0)) | |
779 | (while (< i n) | |
780 | (insert | |
781 | (format " { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + %d) },\n" | |
782 | (* (+ 4 4 8 4 4 32) i))) | |
783 | (insert " { SCM_BOOL_F, SCM_PACK (0) },\n") | |
784 | (setq i (1+ i))))) | |
785 | */ | |
786 | #define STATIC_OBJCODE_TAG \ | |
787 | SCM_PACK (scm_tc7_objcode | (SCM_F_OBJCODE_IS_STATIC << 8)) | |
788 | ||
789 | static const struct | |
790 | { | |
791 | scm_t_uint64 dummy; /* alignment */ | |
792 | scm_t_cell cells[10 * 2]; /* 10 double cells */ | |
793 | } objcode_cells = { | |
794 | 0, | |
795 | /* C-u 1 0 M-x generate-objcode-cells RET */ | |
796 | { | |
797 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 0) }, | |
798 | { SCM_BOOL_F, SCM_PACK (0) }, | |
799 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 56) }, | |
800 | { SCM_BOOL_F, SCM_PACK (0) }, | |
801 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 112) }, | |
802 | { SCM_BOOL_F, SCM_PACK (0) }, | |
803 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 168) }, | |
804 | { SCM_BOOL_F, SCM_PACK (0) }, | |
805 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 224) }, | |
806 | { SCM_BOOL_F, SCM_PACK (0) }, | |
807 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 280) }, | |
808 | { SCM_BOOL_F, SCM_PACK (0) }, | |
809 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 336) }, | |
810 | { SCM_BOOL_F, SCM_PACK (0) }, | |
811 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 392) }, | |
812 | { SCM_BOOL_F, SCM_PACK (0) }, | |
813 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 448) }, | |
814 | { SCM_BOOL_F, SCM_PACK (0) }, | |
815 | { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 504) }, | |
816 | { SCM_BOOL_F, SCM_PACK (0) } | |
817 | } | |
818 | }; | |
819 | ||
820 | static const SCM objcode_trampolines[10] = { | |
821 | SCM_PACK (objcode_cells.cells+0), | |
822 | SCM_PACK (objcode_cells.cells+2), | |
823 | SCM_PACK (objcode_cells.cells+4), | |
824 | SCM_PACK (objcode_cells.cells+6), | |
825 | SCM_PACK (objcode_cells.cells+8), | |
826 | SCM_PACK (objcode_cells.cells+10), | |
827 | SCM_PACK (objcode_cells.cells+12), | |
828 | SCM_PACK (objcode_cells.cells+14), | |
829 | SCM_PACK (objcode_cells.cells+16), | |
830 | SCM_PACK (objcode_cells.cells+18), | |
831 | }; | |
832 | ||
833 | static SCM | |
834 | cif_to_procedure (SCM cif, SCM func_ptr) | |
835 | { | |
836 | unsigned nargs = SCM_FOREIGN_POINTER (cif, ffi_cif)->nargs; | |
837 | SCM objcode, table, ret; | |
838 | ||
839 | if (nargs < 10) | |
840 | objcode = objcode_trampolines[nargs]; | |
841 | else | |
75383ddb AW |
842 | scm_misc_error ("make-foreign-function", "args >= 10 currently unimplemented", |
843 | SCM_EOL); | |
d8b04f04 AW |
844 | |
845 | table = scm_c_make_vector (2, SCM_UNDEFINED); | |
846 | SCM_SIMPLE_VECTOR_SET (table, 0, scm_cons (cif, func_ptr)); | |
847 | SCM_SIMPLE_VECTOR_SET (table, 1, SCM_BOOL_F); /* name */ | |
848 | ret = scm_make_program (objcode, table, SCM_BOOL_F); | |
849 | ||
850 | return ret; | |
851 | } | |
852 | ||
165a8643 | 853 | /* Set *LOC to the foreign representation of X with TYPE. */ |
4d9130a5 | 854 | static void |
165a8643 | 855 | unpack (const ffi_type *type, void *loc, SCM x) |
4d9130a5 AW |
856 | { |
857 | switch (type->type) | |
858 | { | |
859 | case FFI_TYPE_FLOAT: | |
165a8643 | 860 | *(float *) loc = scm_to_double (x); |
4d9130a5 AW |
861 | break; |
862 | case FFI_TYPE_DOUBLE: | |
165a8643 | 863 | *(double *) loc = scm_to_double (x); |
4d9130a5 AW |
864 | break; |
865 | case FFI_TYPE_UINT8: | |
165a8643 | 866 | *(scm_t_uint8 *) loc = scm_to_uint8 (x); |
4d9130a5 AW |
867 | break; |
868 | case FFI_TYPE_SINT8: | |
165a8643 | 869 | *(scm_t_int8 *) loc = scm_to_int8 (x); |
4d9130a5 AW |
870 | break; |
871 | case FFI_TYPE_UINT16: | |
165a8643 | 872 | *(scm_t_uint16 *) loc = scm_to_uint16 (x); |
4d9130a5 AW |
873 | break; |
874 | case FFI_TYPE_SINT16: | |
165a8643 | 875 | *(scm_t_int16 *) loc = scm_to_int16 (x); |
4d9130a5 AW |
876 | break; |
877 | case FFI_TYPE_UINT32: | |
165a8643 | 878 | *(scm_t_uint32 *) loc = scm_to_uint32 (x); |
4d9130a5 AW |
879 | break; |
880 | case FFI_TYPE_SINT32: | |
165a8643 | 881 | *(scm_t_int32 *) loc = scm_to_int32 (x); |
4d9130a5 AW |
882 | break; |
883 | case FFI_TYPE_UINT64: | |
165a8643 | 884 | *(scm_t_uint64 *) loc = scm_to_uint64 (x); |
4d9130a5 AW |
885 | break; |
886 | case FFI_TYPE_SINT64: | |
165a8643 | 887 | *(scm_t_int64 *) loc = scm_to_int64 (x); |
4d9130a5 AW |
888 | break; |
889 | case FFI_TYPE_STRUCT: | |
890 | if (!SCM_FOREIGN_TYPED_P (x, VOID)) | |
165a8643 | 891 | scm_wrong_type_arg_msg ("foreign-call", 0, x, "foreign void pointer"); |
4d9130a5 | 892 | if (SCM_FOREIGN_LEN (x) && SCM_FOREIGN_LEN (x) != type->size) |
165a8643 LC |
893 | scm_wrong_type_arg_msg ("foreign-call", 0, x, |
894 | "foreign void pointer of correct length"); | |
4d9130a5 AW |
895 | memcpy (loc, SCM_FOREIGN_POINTER (x, void), type->size); |
896 | break; | |
897 | case FFI_TYPE_POINTER: | |
898 | if (!SCM_FOREIGN_TYPED_P (x, VOID)) | |
165a8643 LC |
899 | scm_wrong_type_arg_msg ("foreign-call", 0, x, "foreign void pointer"); |
900 | *(void **) loc = SCM_FOREIGN_POINTER (x, void); | |
4d9130a5 AW |
901 | break; |
902 | default: | |
903 | abort (); | |
904 | } | |
905 | } | |
906 | ||
165a8643 | 907 | /* Return a Scheme representation of the foreign value at LOC of type TYPE. */ |
4d9130a5 | 908 | static SCM |
165a8643 | 909 | pack (const ffi_type * type, const void *loc) |
4d9130a5 AW |
910 | { |
911 | switch (type->type) | |
912 | { | |
913 | case FFI_TYPE_VOID: | |
914 | return SCM_UNSPECIFIED; | |
915 | case FFI_TYPE_FLOAT: | |
165a8643 | 916 | return scm_from_double (*(float *) loc); |
4d9130a5 | 917 | case FFI_TYPE_DOUBLE: |
165a8643 | 918 | return scm_from_double (*(double *) loc); |
4d9130a5 | 919 | case FFI_TYPE_UINT8: |
165a8643 | 920 | return scm_from_uint8 (*(scm_t_uint8 *) loc); |
4d9130a5 | 921 | case FFI_TYPE_SINT8: |
165a8643 | 922 | return scm_from_int8 (*(scm_t_int8 *) loc); |
4d9130a5 | 923 | case FFI_TYPE_UINT16: |
165a8643 | 924 | return scm_from_uint16 (*(scm_t_uint16 *) loc); |
4d9130a5 | 925 | case FFI_TYPE_SINT16: |
165a8643 | 926 | return scm_from_int16 (*(scm_t_int16 *) loc); |
4d9130a5 | 927 | case FFI_TYPE_UINT32: |
165a8643 | 928 | return scm_from_uint32 (*(scm_t_uint32 *) loc); |
4d9130a5 | 929 | case FFI_TYPE_SINT32: |
165a8643 | 930 | return scm_from_int32 (*(scm_t_int32 *) loc); |
4d9130a5 | 931 | case FFI_TYPE_UINT64: |
165a8643 | 932 | return scm_from_uint64 (*(scm_t_uint64 *) loc); |
4d9130a5 | 933 | case FFI_TYPE_SINT64: |
165a8643 | 934 | return scm_from_int64 (*(scm_t_int64 *) loc); |
4d9130a5 AW |
935 | case FFI_TYPE_STRUCT: |
936 | { | |
165a8643 LC |
937 | void *mem = scm_gc_malloc_pointerless (type->size, "foreign"); |
938 | memcpy (mem, loc, type->size); | |
939 | return scm_take_foreign_pointer (SCM_FOREIGN_TYPE_VOID, | |
940 | mem, type->size, NULL); | |
4d9130a5 AW |
941 | } |
942 | case FFI_TYPE_POINTER: | |
943 | return scm_take_foreign_pointer (SCM_FOREIGN_TYPE_VOID, | |
165a8643 | 944 | *(void **) loc, 0, NULL); |
4d9130a5 AW |
945 | default: |
946 | abort (); | |
947 | } | |
948 | } | |
949 | ||
165a8643 | 950 | |
4d9130a5 | 951 | SCM |
165a8643 | 952 | scm_i_foreign_call (SCM foreign, const SCM *argv) |
4d9130a5 AW |
953 | { |
954 | /* FOREIGN is the pair that cif_to_procedure set as the 0th element of the | |
955 | objtable. */ | |
956 | ffi_cif *cif; | |
957 | void (*func)(); | |
958 | scm_t_uint8 *data; | |
959 | void *rvalue; | |
960 | void **args; | |
961 | unsigned i; | |
a2c69049 | 962 | size_t arg_size; |
4d9130a5 AW |
963 | scm_t_ptrdiff off; |
964 | ||
165a8643 LC |
965 | cif = SCM_FOREIGN_POINTER (SCM_CAR (foreign), ffi_cif); |
966 | func = SCM_FOREIGN_POINTER (SCM_CDR (foreign), void); | |
a2c69049 LC |
967 | |
968 | /* Argument pointers. */ | |
4d9130a5 | 969 | args = alloca (sizeof(void*) * cif->nargs); |
a2c69049 LC |
970 | |
971 | /* Compute the amount of memory needed to store all the argument values. | |
972 | Note: as of libffi 3.0.9 `cif->bytes' is undocumented and is zero, so it | |
973 | can't be used for that purpose. */ | |
974 | for (i = 0, arg_size = 0; | |
975 | i < cif->nargs; | |
976 | i++, arg_size) | |
977 | arg_size += ROUND_UP (cif->arg_types[i]->size, | |
978 | cif->arg_types[i]->alignment); | |
979 | ||
980 | /* Space for argument values, followed by return value. */ | |
981 | data = alloca (arg_size | |
982 | + ROUND_UP (cif->rtype->size, cif->rtype->alignment)); | |
983 | ||
165a8643 LC |
984 | /* Unpack ARGV to native values, setting ARGV pointers. */ |
985 | for (i = 0, off = 0; | |
986 | i < cif->nargs; | |
987 | off += cif->arg_types[i]->size, i++) | |
4d9130a5 AW |
988 | { |
989 | off = ROUND_UP (off, cif->arg_types[i]->alignment); | |
990 | args[i] = data + off; | |
991 | unpack (cif->arg_types[i], args[i], argv[i]); | |
4d9130a5 | 992 | } |
165a8643 LC |
993 | |
994 | /* Prepare space for the return value. */ | |
4d9130a5 AW |
995 | off = ROUND_UP (off, cif->rtype->alignment); |
996 | rvalue = data + off; | |
997 | ||
998 | /* off we go! */ | |
999 | ffi_call (cif, func, rvalue, args); | |
1000 | ||
1001 | return pack (cif->rtype, rvalue); | |
1002 | } | |
1003 | ||
d8b04f04 AW |
1004 | \f |
1005 | ||
ab4779ff | 1006 | static void |
e2c2a699 AW |
1007 | scm_init_foreign (void) |
1008 | { | |
1009 | #ifndef SCM_MAGIC_SNARFER | |
1010 | #include "libguile/foreign.x" | |
1011 | #endif | |
ab4779ff AW |
1012 | scm_define (sym_void, scm_from_uint8 (SCM_FOREIGN_TYPE_VOID)); |
1013 | scm_define (sym_float, scm_from_uint8 (SCM_FOREIGN_TYPE_FLOAT)); | |
1014 | scm_define (sym_double, scm_from_uint8 (SCM_FOREIGN_TYPE_DOUBLE)); | |
1015 | scm_define (sym_uint8, scm_from_uint8 (SCM_FOREIGN_TYPE_UINT8)); | |
1016 | scm_define (sym_int8, scm_from_uint8 (SCM_FOREIGN_TYPE_INT8)); | |
1017 | scm_define (sym_uint16, scm_from_uint8 (SCM_FOREIGN_TYPE_UINT16)); | |
1018 | scm_define (sym_int16, scm_from_uint8 (SCM_FOREIGN_TYPE_INT16)); | |
1019 | scm_define (sym_uint32, scm_from_uint8 (SCM_FOREIGN_TYPE_UINT32)); | |
1020 | scm_define (sym_int32, scm_from_uint8 (SCM_FOREIGN_TYPE_INT32)); | |
1021 | scm_define (sym_uint64, scm_from_uint8 (SCM_FOREIGN_TYPE_UINT64)); | |
1022 | scm_define (sym_int64, scm_from_uint8 (SCM_FOREIGN_TYPE_INT64)); | |
dd1464bf LC |
1023 | |
1024 | scm_define (sym_int, | |
1025 | #if SIZEOF_INT == 8 | |
1026 | scm_from_uint8 (SCM_FOREIGN_TYPE_INT64) | |
1027 | #elif SIZEOF_INT == 4 | |
1028 | scm_from_uint8 (SCM_FOREIGN_TYPE_INT32) | |
1029 | #else | |
1030 | # error unsupported sizeof (int) | |
1031 | #endif | |
1032 | ); | |
1033 | ||
1034 | scm_define (sym_unsigned_int, | |
1035 | #if SIZEOF_UNSIGNED_INT == 8 | |
1036 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT64) | |
1037 | #elif SIZEOF_UNSIGNED_INT == 4 | |
1038 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT32) | |
1039 | #else | |
1040 | # error unsupported sizeof (unsigned int) | |
1041 | #endif | |
1042 | ); | |
1043 | ||
1044 | scm_define (sym_long, | |
1045 | #if SIZEOF_LONG == 8 | |
1046 | scm_from_uint8 (SCM_FOREIGN_TYPE_INT64) | |
1047 | #elif SIZEOF_LONG == 4 | |
1048 | scm_from_uint8 (SCM_FOREIGN_TYPE_INT32) | |
1049 | #else | |
1050 | # error unsupported sizeof (long) | |
1051 | #endif | |
1052 | ); | |
1053 | ||
1054 | scm_define (sym_unsigned_long, | |
1055 | #if SIZEOF_UNSIGNED_LONG == 8 | |
1056 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT64) | |
1057 | #elif SIZEOF_UNSIGNED_LONG == 4 | |
1058 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT32) | |
1059 | #else | |
1060 | # error unsupported sizeof (unsigned long) | |
1061 | #endif | |
1062 | ); | |
1063 | ||
1064 | scm_define (sym_size_t, | |
1065 | #if SIZEOF_SIZE_T == 8 | |
1066 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT64) | |
1067 | #elif SIZEOF_SIZE_T == 4 | |
1068 | scm_from_uint8 (SCM_FOREIGN_TYPE_UINT32) | |
1069 | #else | |
1070 | # error unsupported sizeof (size_t) | |
1071 | #endif | |
1072 | ); | |
54eb59cf LC |
1073 | |
1074 | scm_define (sym_null, PTR2SCM (&null_pointer)); | |
ab4779ff AW |
1075 | } |
1076 | ||
1077 | void | |
1078 | scm_register_foreign (void) | |
1079 | { | |
44602b08 AW |
1080 | scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION, |
1081 | "scm_init_foreign", | |
ab4779ff AW |
1082 | (scm_t_extension_init_func)scm_init_foreign, |
1083 | NULL); | |
20aafae2 | 1084 | foreign_weak_refs = scm_make_weak_key_hash_table (SCM_UNDEFINED); |
e2c2a699 AW |
1085 | } |
1086 | ||
1087 | /* | |
1088 | Local Variables: | |
1089 | c-file-style: "gnu" | |
1090 | End: | |
1091 | */ |