Commit | Line | Data |
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c438cd71 | 1 | /* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
a3cae847 | 2 | * 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 |
c438cd71 LC |
3 | * Free Software Foundation, Inc. |
4 | * | |
b7742c6b AW |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public License | |
7 | * as published by the Free Software Foundation; either version 3 of | |
8 | * the License, or (at your option) any later version. | |
9 | * | |
10 | * This library is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * Lesser General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU Lesser General Public | |
16 | * License along with this library; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
18 | * 02110-1301 USA | |
19 | */ | |
20 | ||
21 | \f | |
22 | ||
23 | #ifdef HAVE_CONFIG_H | |
24 | # include <config.h> | |
25 | #endif | |
26 | ||
b7742c6b | 27 | #include "libguile/__scm.h" |
b7742c6b AW |
28 | #include "libguile/_scm.h" |
29 | #include "libguile/continuations.h" | |
30 | #include "libguile/eq.h" | |
dc3e203e | 31 | #include "libguile/expand.h" |
b7742c6b AW |
32 | #include "libguile/list.h" |
33 | #include "libguile/macros.h" | |
34 | #include "libguile/memoize.h" | |
35 | #include "libguile/modules.h" | |
36 | #include "libguile/srcprop.h" | |
37 | #include "libguile/ports.h" | |
38 | #include "libguile/print.h" | |
39 | #include "libguile/strings.h" | |
40 | #include "libguile/throw.h" | |
41 | #include "libguile/validate.h" | |
42 | ||
43 | ||
44 | \f | |
45 | ||
46 | ||
b7742c6b AW |
47 | #define CAR(x) SCM_CAR(x) |
48 | #define CDR(x) SCM_CDR(x) | |
49 | #define CAAR(x) SCM_CAAR(x) | |
50 | #define CADR(x) SCM_CADR(x) | |
51 | #define CDAR(x) SCM_CDAR(x) | |
52 | #define CDDR(x) SCM_CDDR(x) | |
53 | #define CADDR(x) SCM_CADDR(x) | |
54 | #define CDDDR(x) SCM_CDDDR(x) | |
b7ecadca | 55 | #define CADDDR(x) SCM_CADDDR(x) |
b7742c6b | 56 | |
cfc28c80 AW |
57 | #define VECTOR_REF(v, i) (SCM_SIMPLE_VECTOR_REF (v, i)) |
58 | #define VECTOR_SET(v, i, x) (SCM_SIMPLE_VECTOR_SET (v, i, x)) | |
59 | #define VECTOR_LENGTH(v) (SCM_SIMPLE_VECTOR_LENGTH (v)) | |
b7742c6b | 60 | |
dc3e203e | 61 | SCM_SYMBOL (sym_case_lambda_star, "case-lambda*"); |
b7742c6b AW |
62 | |
63 | \f | |
64 | ||
65 | ||
bb97e4ab AW |
66 | /* Primitives not exposed to general Scheme. */ |
67 | static SCM wind; | |
68 | static SCM unwind; | |
c32b7c4c AW |
69 | static SCM push_fluid; |
70 | static SCM pop_fluid; | |
bb97e4ab AW |
71 | |
72 | static SCM | |
73 | do_wind (SCM in, SCM out) | |
74 | { | |
75 | scm_dynstack_push_dynwind (&SCM_I_CURRENT_THREAD->dynstack, in, out); | |
76 | return SCM_UNSPECIFIED; | |
77 | } | |
78 | ||
79 | static SCM | |
80 | do_unwind (void) | |
81 | { | |
82 | scm_dynstack_pop (&SCM_I_CURRENT_THREAD->dynstack); | |
83 | return SCM_UNSPECIFIED; | |
84 | } | |
85 | ||
c32b7c4c AW |
86 | static SCM |
87 | do_push_fluid (SCM fluid, SCM val) | |
88 | { | |
89 | scm_i_thread *thread = SCM_I_CURRENT_THREAD; | |
98eaef1b AW |
90 | scm_dynstack_push_fluid (&thread->dynstack, fluid, val, |
91 | thread->dynamic_state); | |
c32b7c4c AW |
92 | return SCM_UNSPECIFIED; |
93 | } | |
94 | ||
95 | static SCM | |
96 | do_pop_fluid (void) | |
97 | { | |
98 | scm_i_thread *thread = SCM_I_CURRENT_THREAD; | |
98eaef1b | 99 | scm_dynstack_unwind_fluid (&thread->dynstack, thread->dynamic_state); |
c32b7c4c AW |
100 | return SCM_UNSPECIFIED; |
101 | } | |
102 | ||
bb97e4ab AW |
103 | |
104 | \f | |
105 | ||
b7742c6b AW |
106 | /* {Evaluator memoized expressions} |
107 | */ | |
108 | ||
109 | scm_t_bits scm_tc16_memoized; | |
110 | ||
b2b33168 | 111 | #define MAKMEMO(n, args) \ |
0720f70e | 112 | (scm_cons (SCM_I_MAKINUM (n), args)) |
b7742c6b | 113 | |
6fc3eae4 AW |
114 | #define MAKMEMO_SEQ(head,tail) \ |
115 | MAKMEMO (SCM_M_SEQ, scm_cons (head, tail)) | |
b7742c6b AW |
116 | #define MAKMEMO_IF(test, then, else_) \ |
117 | MAKMEMO (SCM_M_IF, scm_cons (test, scm_cons (then, else_))) | |
8f9c5b58 AW |
118 | #define FIXED_ARITY(nreq) \ |
119 | scm_list_1 (SCM_I_MAKINUM (nreq)) | |
120 | #define REST_ARITY(nreq, rest) \ | |
121 | scm_list_2 (SCM_I_MAKINUM (nreq), rest) | |
cfdc8416 AW |
122 | #define FULL_ARITY(nreq, rest, nopt, kw, ninits, unbound, alt) \ |
123 | scm_list_n (SCM_I_MAKINUM (nreq), rest, SCM_I_MAKINUM (nopt), kw, \ | |
124 | SCM_I_MAKINUM (ninits), unbound, alt, SCM_UNDEFINED) | |
27ecfd36 | 125 | #define MAKMEMO_LAMBDA(body, arity, meta) \ |
c438cd71 | 126 | MAKMEMO (SCM_M_LAMBDA, \ |
27ecfd36 | 127 | scm_cons (body, scm_cons (meta, arity))) |
a3cae847 AW |
128 | #define MAKMEMO_CAPTURE_ENV(vars, body) \ |
129 | MAKMEMO (SCM_M_CAPTURE_ENV, scm_cons (vars, body)) | |
b7742c6b AW |
130 | #define MAKMEMO_LET(inits, body) \ |
131 | MAKMEMO (SCM_M_LET, scm_cons (inits, body)) | |
132 | #define MAKMEMO_QUOTE(exp) \ | |
133 | MAKMEMO (SCM_M_QUOTE, exp) | |
134 | #define MAKMEMO_DEFINE(var, val) \ | |
135 | MAKMEMO (SCM_M_DEFINE, scm_cons (var, val)) | |
ef47c422 AW |
136 | #define MAKMEMO_CAPTURE_MODULE(exp) \ |
137 | MAKMEMO (SCM_M_CAPTURE_MODULE, exp) | |
2cd72a84 AW |
138 | #define MAKMEMO_APPLY(proc, args)\ |
139 | MAKMEMO (SCM_M_APPLY, scm_list_2 (proc, args)) | |
b7742c6b AW |
140 | #define MAKMEMO_CONT(proc) \ |
141 | MAKMEMO (SCM_M_CONT, proc) | |
142 | #define MAKMEMO_CALL_WITH_VALUES(prod, cons) \ | |
143 | MAKMEMO (SCM_M_CALL_WITH_VALUES, scm_cons (prod, cons)) | |
9331f91c AW |
144 | #define MAKMEMO_CALL(proc, nargs, args) \ |
145 | MAKMEMO (SCM_M_CALL, scm_cons (proc, scm_cons (SCM_I_MAKINUM (nargs), args))) | |
cfc28c80 AW |
146 | #define MAKMEMO_LEX_REF(pos) \ |
147 | MAKMEMO (SCM_M_LEXICAL_REF, pos) | |
148 | #define MAKMEMO_LEX_SET(pos, val) \ | |
149 | MAKMEMO (SCM_M_LEXICAL_SET, scm_cons (pos, val)) | |
b7742c6b AW |
150 | #define MAKMEMO_TOP_REF(var) \ |
151 | MAKMEMO (SCM_M_TOPLEVEL_REF, var) | |
152 | #define MAKMEMO_TOP_SET(var, val) \ | |
153 | MAKMEMO (SCM_M_TOPLEVEL_SET, scm_cons (var, val)) | |
154 | #define MAKMEMO_MOD_REF(mod, var, public) \ | |
155 | MAKMEMO (SCM_M_MODULE_REF, scm_cons (mod, scm_cons (var, public))) | |
156 | #define MAKMEMO_MOD_SET(val, mod, var, public) \ | |
157 | MAKMEMO (SCM_M_MODULE_SET, scm_cons (val, scm_cons (mod, scm_cons (var, public)))) | |
1773bc7d AW |
158 | #define MAKMEMO_CALL_WITH_PROMPT(tag, thunk, handler) \ |
159 | MAKMEMO (SCM_M_CALL_WITH_PROMPT, scm_cons (tag, scm_cons (thunk, handler))) | |
b7742c6b | 160 | |
2cd72a84 | 161 | |
b7742c6b AW |
162 | \f |
163 | ||
164 | /* This table must agree with the list of M_ constants in memoize.h */ | |
165 | static const char *const memoized_tags[] = | |
166 | { | |
6fc3eae4 | 167 | "seq", |
b7742c6b AW |
168 | "if", |
169 | "lambda", | |
99fb07e1 | 170 | "capture-env", |
b7742c6b AW |
171 | "let", |
172 | "quote", | |
173 | "define", | |
ef47c422 | 174 | "capture-module", |
b7742c6b | 175 | "apply", |
3149a5b6 | 176 | "call/cc", |
b7742c6b AW |
177 | "call-with-values", |
178 | "call", | |
179 | "lexical-ref", | |
180 | "lexical-set!", | |
181 | "toplevel-ref", | |
182 | "toplevel-set!", | |
183 | "module-ref", | |
3149a5b6 | 184 | "module-set!", |
1773bc7d | 185 | "call-with-prompt", |
b7742c6b AW |
186 | }; |
187 | ||
b7742c6b | 188 | |
b7742c6b AW |
189 | \f |
190 | ||
191 | ||
a3cae847 AW |
192 | /* Memoization-time environments mirror the structure of eval-time |
193 | environments. Each link in the chain at memoization-time corresponds | |
194 | to a link at eval-time. | |
195 | ||
196 | env := module | (link, env) | |
197 | module := #f | #t | |
198 | link := flat-link . nested-link | |
199 | flat-link := (#t . ((var . pos) ...)) | |
200 | nested-link := (#f . #(var ...)) | |
201 | ||
202 | A module of #f indicates that the current module has not yet been | |
203 | captured. Memoizing a capture-module expression will capture the | |
204 | module. | |
205 | ||
206 | Flat environments copy the values for a set of free variables into a | |
207 | flat environment, via the capture-env expression. During memoization | |
208 | a flat link collects the values of free variables, along with their | |
209 | resolved outer locations. We are able to copy values because the | |
210 | incoming expression has already been assignment-converted. Flat | |
211 | environments prevent closures from hanging on to too much memory. | |
212 | ||
213 | Nested environments have a rib of "let" bindings, and link to an | |
214 | outer environment. | |
215 | */ | |
216 | ||
b7742c6b | 217 | static int |
cfc28c80 AW |
218 | try_lookup_rib (SCM x, SCM rib) |
219 | { | |
220 | int idx = 0; | |
221 | for (; idx < VECTOR_LENGTH (rib); idx++) | |
222 | if (scm_is_eq (x, VECTOR_REF (rib, idx))) | |
223 | return idx; /* bound */ | |
224 | return -1; | |
225 | } | |
226 | ||
227 | static int | |
228 | lookup_rib (SCM x, SCM rib) | |
229 | { | |
230 | int idx = try_lookup_rib (x, rib); | |
231 | if (idx < 0) | |
232 | abort (); | |
233 | return idx; | |
234 | } | |
235 | ||
236 | static SCM | |
237 | make_pos (int depth, int width) | |
238 | { | |
239 | return scm_cons (SCM_I_MAKINUM (depth), SCM_I_MAKINUM (width)); | |
240 | } | |
241 | ||
a3cae847 AW |
242 | static SCM |
243 | push_nested_link (SCM vars, SCM env) | |
244 | { | |
245 | return scm_acons (SCM_BOOL_F, vars, env); | |
246 | } | |
247 | ||
248 | static SCM | |
249 | push_flat_link (SCM env) | |
250 | { | |
251 | return scm_acons (SCM_BOOL_T, SCM_EOL, env); | |
252 | } | |
253 | ||
254 | static int | |
255 | env_link_is_flat (SCM env_link) | |
256 | { | |
257 | return scm_is_true (CAR (env_link)); | |
258 | } | |
259 | ||
260 | static SCM | |
261 | env_link_vars (SCM env_link) | |
262 | { | |
263 | return CDR (env_link); | |
264 | } | |
265 | ||
266 | static void | |
267 | env_link_add_flat_var (SCM env_link, SCM var, SCM pos) | |
268 | { | |
269 | SCM vars = env_link_vars (env_link); | |
270 | if (scm_is_false (scm_assq (var, vars))) | |
271 | scm_set_cdr_x (env_link, scm_acons (var, pos, vars)); | |
272 | } | |
273 | ||
cfc28c80 | 274 | static SCM |
dc3e203e | 275 | lookup (SCM x, SCM env) |
b7742c6b | 276 | { |
cfc28c80 AW |
277 | int d = 0; |
278 | for (; scm_is_pair (env); env = CDR (env), d++) | |
279 | { | |
a3cae847 AW |
280 | SCM link = CAR (env); |
281 | if (env_link_is_flat (link)) | |
282 | { | |
283 | int w; | |
284 | SCM vars; | |
285 | ||
286 | for (vars = env_link_vars (link), w = scm_ilength (vars) - 1; | |
287 | scm_is_pair (vars); | |
288 | vars = CDR (vars), w--) | |
289 | if (scm_is_eq (x, (CAAR (vars)))) | |
290 | return make_pos (d, w); | |
291 | ||
292 | env_link_add_flat_var (link, x, lookup (x, CDR (env))); | |
293 | return make_pos (d, scm_ilength (env_link_vars (link)) - 1); | |
294 | } | |
295 | else | |
296 | { | |
297 | int w = try_lookup_rib (x, env_link_vars (link)); | |
298 | if (w < 0) | |
299 | continue; | |
300 | return make_pos (d, w); | |
301 | } | |
cfc28c80 | 302 | } |
dc3e203e | 303 | abort (); |
b7742c6b AW |
304 | } |
305 | ||
a3cae847 AW |
306 | static SCM |
307 | capture_flat_env (SCM lambda, SCM env) | |
308 | { | |
309 | int nenv; | |
310 | SCM vars, link, locs; | |
311 | ||
312 | link = CAR (env); | |
313 | vars = env_link_vars (link); | |
314 | nenv = scm_ilength (vars); | |
315 | locs = scm_c_make_vector (nenv, SCM_BOOL_F); | |
316 | ||
317 | for (; scm_is_pair (vars); vars = CDR (vars)) | |
318 | scm_c_vector_set_x (locs, --nenv, CDAR (vars)); | |
319 | ||
320 | return MAKMEMO_CAPTURE_ENV (locs, lambda); | |
321 | } | |
322 | ||
dc3e203e AW |
323 | /* Abbreviate SCM_EXPANDED_REF. Copied because I'm not sure about symbol pasting */ |
324 | #define REF(x,type,field) \ | |
325 | (scm_struct_ref (x, SCM_I_MAKINUM (SCM_EXPANDED_##type##_##field))) | |
b7742c6b | 326 | |
dc3e203e | 327 | static SCM list_of_guile = SCM_BOOL_F; |
b7742c6b | 328 | |
dc3e203e | 329 | static SCM memoize (SCM exp, SCM env); |
b7742c6b AW |
330 | |
331 | static SCM | |
dc3e203e | 332 | memoize_exps (SCM exps, SCM env) |
b7742c6b | 333 | { |
dc3e203e AW |
334 | SCM ret; |
335 | for (ret = SCM_EOL; scm_is_pair (exps); exps = CDR (exps)) | |
336 | ret = scm_cons (memoize (CAR (exps), env), ret); | |
337 | return scm_reverse_x (ret, SCM_UNDEFINED); | |
7572ee52 | 338 | } |
7572ee52 | 339 | |
ef47c422 AW |
340 | static SCM |
341 | capture_env (SCM env) | |
342 | { | |
343 | if (scm_is_false (env)) | |
344 | return SCM_BOOL_T; | |
345 | return env; | |
346 | } | |
347 | ||
348 | static SCM | |
349 | maybe_makmemo_capture_module (SCM exp, SCM env) | |
350 | { | |
351 | if (scm_is_false (env)) | |
352 | return MAKMEMO_CAPTURE_MODULE (exp); | |
353 | return exp; | |
354 | } | |
355 | ||
7572ee52 | 356 | static SCM |
dc3e203e | 357 | memoize (SCM exp, SCM env) |
b7742c6b | 358 | { |
dc3e203e AW |
359 | if (!SCM_EXPANDED_P (exp)) |
360 | abort (); | |
b7742c6b | 361 | |
dc3e203e | 362 | switch (SCM_EXPANDED_TYPE (exp)) |
b7742c6b | 363 | { |
dc3e203e AW |
364 | case SCM_EXPANDED_VOID: |
365 | return MAKMEMO_QUOTE (SCM_UNSPECIFIED); | |
366 | ||
367 | case SCM_EXPANDED_CONST: | |
368 | return MAKMEMO_QUOTE (REF (exp, CONST, EXP)); | |
b7742c6b | 369 | |
dc3e203e AW |
370 | case SCM_EXPANDED_PRIMITIVE_REF: |
371 | if (scm_is_eq (scm_current_module (), scm_the_root_module ())) | |
ef47c422 AW |
372 | return maybe_makmemo_capture_module |
373 | (MAKMEMO_TOP_REF (REF (exp, PRIMITIVE_REF, NAME)), | |
374 | env); | |
dc3e203e AW |
375 | else |
376 | return MAKMEMO_MOD_REF (list_of_guile, REF (exp, PRIMITIVE_REF, NAME), | |
377 | SCM_BOOL_F); | |
378 | ||
379 | case SCM_EXPANDED_LEXICAL_REF: | |
380 | return MAKMEMO_LEX_REF (lookup (REF (exp, LEXICAL_REF, GENSYM), env)); | |
381 | ||
382 | case SCM_EXPANDED_LEXICAL_SET: | |
383 | return MAKMEMO_LEX_SET (lookup (REF (exp, LEXICAL_SET, GENSYM), env), | |
384 | memoize (REF (exp, LEXICAL_SET, EXP), env)); | |
385 | ||
386 | case SCM_EXPANDED_MODULE_REF: | |
387 | return MAKMEMO_MOD_REF (REF (exp, MODULE_REF, MOD), | |
388 | REF (exp, MODULE_REF, NAME), | |
389 | REF (exp, MODULE_REF, PUBLIC)); | |
390 | ||
391 | case SCM_EXPANDED_MODULE_SET: | |
392 | return MAKMEMO_MOD_SET (memoize (REF (exp, MODULE_SET, EXP), env), | |
393 | REF (exp, MODULE_SET, MOD), | |
394 | REF (exp, MODULE_SET, NAME), | |
395 | REF (exp, MODULE_SET, PUBLIC)); | |
396 | ||
397 | case SCM_EXPANDED_TOPLEVEL_REF: | |
ef47c422 AW |
398 | return maybe_makmemo_capture_module |
399 | (MAKMEMO_TOP_REF (REF (exp, TOPLEVEL_REF, NAME)), env); | |
dc3e203e AW |
400 | |
401 | case SCM_EXPANDED_TOPLEVEL_SET: | |
ef47c422 AW |
402 | return maybe_makmemo_capture_module |
403 | (MAKMEMO_TOP_SET (REF (exp, TOPLEVEL_SET, NAME), | |
404 | memoize (REF (exp, TOPLEVEL_SET, EXP), | |
405 | capture_env (env))), | |
406 | env); | |
dc3e203e AW |
407 | |
408 | case SCM_EXPANDED_TOPLEVEL_DEFINE: | |
409 | return MAKMEMO_DEFINE (REF (exp, TOPLEVEL_DEFINE, NAME), | |
410 | memoize (REF (exp, TOPLEVEL_DEFINE, EXP), env)); | |
411 | ||
412 | case SCM_EXPANDED_CONDITIONAL: | |
413 | return MAKMEMO_IF (memoize (REF (exp, CONDITIONAL, TEST), env), | |
414 | memoize (REF (exp, CONDITIONAL, CONSEQUENT), env), | |
415 | memoize (REF (exp, CONDITIONAL, ALTERNATE), env)); | |
416 | ||
7081d4f9 | 417 | case SCM_EXPANDED_CALL: |
dc3e203e AW |
418 | { |
419 | SCM proc, args; | |
b7742c6b | 420 | |
7081d4f9 AW |
421 | proc = REF (exp, CALL, PROC); |
422 | args = memoize_exps (REF (exp, CALL, ARGS), env); | |
b7742c6b | 423 | |
dc3e203e AW |
424 | return MAKMEMO_CALL (memoize (proc, env), scm_ilength (args), args); |
425 | } | |
b7742c6b | 426 | |
a881a4ae AW |
427 | case SCM_EXPANDED_PRIMCALL: |
428 | { | |
1773bc7d AW |
429 | SCM name, args; |
430 | int nargs; | |
a881a4ae | 431 | |
1773bc7d | 432 | name = REF (exp, PRIMCALL, NAME); |
a881a4ae | 433 | args = memoize_exps (REF (exp, PRIMCALL, ARGS), env); |
1773bc7d AW |
434 | nargs = scm_ilength (args); |
435 | ||
436 | if (nargs == 3 | |
437 | && scm_is_eq (name, scm_from_latin1_symbol ("call-with-prompt"))) | |
438 | return MAKMEMO_CALL_WITH_PROMPT (CAR (args), | |
439 | CADR (args), | |
440 | CADDR (args)); | |
39caffe7 AW |
441 | else if (nargs == 2 |
442 | && scm_is_eq (name, scm_from_latin1_symbol ("apply"))) | |
443 | return MAKMEMO_APPLY (CAR (args), CADR (args)); | |
bc056057 AW |
444 | else if (nargs == 1 |
445 | && scm_is_eq (name, | |
446 | scm_from_latin1_symbol | |
447 | ("call-with-current-continuation"))) | |
448 | return MAKMEMO_CONT (CAR (args)); | |
0fcc39a0 AW |
449 | else if (nargs == 2 |
450 | && scm_is_eq (name, | |
451 | scm_from_latin1_symbol ("call-with-values"))) | |
452 | return MAKMEMO_CALL_WITH_VALUES (CAR (args), CADR (args)); | |
bb97e4ab AW |
453 | else if (nargs == 2 |
454 | && scm_is_eq (name, scm_from_latin1_symbol ("wind"))) | |
455 | return MAKMEMO_CALL (MAKMEMO_QUOTE (wind), 2, args); | |
456 | else if (nargs == 0 | |
457 | && scm_is_eq (name, scm_from_latin1_symbol ("unwind"))) | |
458 | return MAKMEMO_CALL (MAKMEMO_QUOTE (unwind), 0, SCM_EOL); | |
c32b7c4c AW |
459 | else if (nargs == 2 |
460 | && scm_is_eq (name, scm_from_latin1_symbol ("push-fluid"))) | |
461 | return MAKMEMO_CALL (MAKMEMO_QUOTE (push_fluid), 2, args); | |
462 | else if (nargs == 0 | |
463 | && scm_is_eq (name, scm_from_latin1_symbol ("pop-fluid"))) | |
464 | return MAKMEMO_CALL (MAKMEMO_QUOTE (pop_fluid), 0, SCM_EOL); | |
1773bc7d | 465 | else if (scm_is_eq (scm_current_module (), scm_the_root_module ())) |
ef47c422 AW |
466 | return MAKMEMO_CALL (maybe_makmemo_capture_module |
467 | (MAKMEMO_TOP_REF (name), env), | |
468 | nargs, args); | |
1773bc7d AW |
469 | else |
470 | return MAKMEMO_CALL (MAKMEMO_MOD_REF (list_of_guile, name, | |
471 | SCM_BOOL_F), | |
472 | nargs, | |
473 | args); | |
a881a4ae AW |
474 | } |
475 | ||
6fc3eae4 AW |
476 | case SCM_EXPANDED_SEQ: |
477 | return MAKMEMO_SEQ (memoize (REF (exp, SEQ, HEAD), env), | |
478 | memoize (REF (exp, SEQ, TAIL), env)); | |
b7742c6b | 479 | |
dc3e203e | 480 | case SCM_EXPANDED_LAMBDA: |
19113f1c | 481 | /* The body will be a lambda-case or #f. */ |
c438cd71 | 482 | { |
a3cae847 | 483 | SCM meta, body, proc, new_env; |
c438cd71 LC |
484 | |
485 | meta = REF (exp, LAMBDA, META); | |
19113f1c | 486 | body = REF (exp, LAMBDA, BODY); |
a3cae847 AW |
487 | new_env = push_flat_link (capture_env (env)); |
488 | ||
19113f1c AW |
489 | if (scm_is_false (body)) |
490 | /* Give a body to case-lambda with no clauses. */ | |
491 | proc = MAKMEMO_LAMBDA | |
492 | (MAKMEMO_CALL | |
493 | (MAKMEMO_MOD_REF (list_of_guile, | |
494 | scm_from_latin1_symbol ("throw"), | |
495 | SCM_BOOL_F), | |
496 | 5, | |
497 | scm_list_5 (MAKMEMO_QUOTE (scm_args_number_key), | |
498 | MAKMEMO_QUOTE (SCM_BOOL_F), | |
499 | MAKMEMO_QUOTE (scm_from_latin1_string | |
500 | ("Wrong number of arguments")), | |
501 | MAKMEMO_QUOTE (SCM_EOL), | |
502 | MAKMEMO_QUOTE (SCM_BOOL_F))), | |
503 | FIXED_ARITY (0), | |
27ecfd36 | 504 | meta); |
19113f1c | 505 | else |
27ecfd36 | 506 | { |
a3cae847 | 507 | proc = memoize (body, new_env); |
27ecfd36 AW |
508 | SCM_SETCAR (SCM_CDR (SCM_MEMOIZED_ARGS (proc)), meta); |
509 | } | |
c438cd71 | 510 | |
a3cae847 AW |
511 | return maybe_makmemo_capture_module (capture_flat_env (proc, new_env), |
512 | env); | |
c438cd71 | 513 | } |
b7742c6b | 514 | |
dc3e203e AW |
515 | case SCM_EXPANDED_LAMBDA_CASE: |
516 | { | |
517 | SCM req, rest, opt, kw, inits, vars, body, alt; | |
a3cae847 | 518 | SCM unbound, arity, rib, new_env; |
cfdc8416 | 519 | int nreq, nopt, ninits; |
dc3e203e AW |
520 | |
521 | req = REF (exp, LAMBDA_CASE, REQ); | |
d61d6686 | 522 | rest = scm_not (scm_not (REF (exp, LAMBDA_CASE, REST))); |
dc3e203e AW |
523 | opt = REF (exp, LAMBDA_CASE, OPT); |
524 | kw = REF (exp, LAMBDA_CASE, KW); | |
525 | inits = REF (exp, LAMBDA_CASE, INITS); | |
526 | vars = REF (exp, LAMBDA_CASE, GENSYMS); | |
527 | body = REF (exp, LAMBDA_CASE, BODY); | |
528 | alt = REF (exp, LAMBDA_CASE, ALTERNATE); | |
529 | ||
530 | nreq = scm_ilength (req); | |
531 | nopt = scm_is_pair (opt) ? scm_ilength (opt) : 0; | |
cfdc8416 AW |
532 | ninits = scm_ilength (inits); |
533 | /* This relies on assignment conversion turning inits into a | |
534 | sequence of CONST expressions whose values are a unique | |
535 | "unbound" token. */ | |
536 | unbound = ninits ? REF (CAR (inits), CONST, EXP) : SCM_BOOL_F; | |
cfc28c80 | 537 | rib = scm_vector (vars); |
a3cae847 | 538 | new_env = push_nested_link (rib, env); |
b7742c6b | 539 | |
632ddbf0 AW |
540 | if (scm_is_true (kw)) |
541 | { | |
542 | /* (aok? (kw name sym) ...) -> (aok? (kw . index) ...) */ | |
543 | SCM aok = CAR (kw), indices = SCM_EOL; | |
544 | for (kw = CDR (kw); scm_is_pair (kw); kw = CDR (kw)) | |
545 | { | |
546 | SCM k; | |
547 | int idx; | |
548 | ||
549 | k = CAR (CAR (kw)); | |
cfc28c80 | 550 | idx = lookup_rib (CADDR (CAR (kw)), rib); |
632ddbf0 AW |
551 | indices = scm_acons (k, SCM_I_MAKINUM (idx), indices); |
552 | } | |
553 | kw = scm_cons (aok, scm_reverse_x (indices, SCM_UNDEFINED)); | |
554 | } | |
555 | ||
dc3e203e AW |
556 | if (scm_is_false (alt) && scm_is_false (kw) && scm_is_false (opt)) |
557 | { | |
558 | if (scm_is_false (rest)) | |
559 | arity = FIXED_ARITY (nreq); | |
560 | else | |
561 | arity = REST_ARITY (nreq, SCM_BOOL_T); | |
562 | } | |
563 | else if (scm_is_true (alt)) | |
cfdc8416 | 564 | arity = FULL_ARITY (nreq, rest, nopt, kw, ninits, unbound, |
dc3e203e AW |
565 | SCM_MEMOIZED_ARGS (memoize (alt, env))); |
566 | else | |
cfdc8416 AW |
567 | arity = FULL_ARITY (nreq, rest, nopt, kw, ninits, unbound, |
568 | SCM_BOOL_F); | |
b7742c6b | 569 | |
a3cae847 AW |
570 | return MAKMEMO_LAMBDA (memoize (body, new_env), arity, |
571 | SCM_BOOL_F /* meta, filled in later */); | |
dc3e203e | 572 | } |
b7742c6b | 573 | |
dc3e203e AW |
574 | case SCM_EXPANDED_LET: |
575 | { | |
cfc28c80 AW |
576 | SCM vars, exps, body, varsv, inits, new_env; |
577 | int i; | |
dc3e203e AW |
578 | |
579 | vars = REF (exp, LET, GENSYMS); | |
580 | exps = REF (exp, LET, VALS); | |
581 | body = REF (exp, LET, BODY); | |
582 | ||
cfc28c80 AW |
583 | varsv = scm_vector (vars); |
584 | inits = scm_c_make_vector (VECTOR_LENGTH (varsv), | |
585 | SCM_BOOL_F); | |
a3cae847 | 586 | new_env = push_nested_link (varsv, capture_env (env)); |
cfc28c80 AW |
587 | for (i = 0; scm_is_pair (exps); exps = CDR (exps), i++) |
588 | VECTOR_SET (inits, i, memoize (CAR (exps), env)); | |
589 | ||
ef47c422 AW |
590 | return maybe_makmemo_capture_module |
591 | (MAKMEMO_LET (inits, memoize (body, new_env)), env); | |
dc3e203e | 592 | } |
b7742c6b | 593 | |
b7742c6b | 594 | default: |
dc3e203e | 595 | abort (); |
b7742c6b AW |
596 | } |
597 | } | |
598 | ||
599 | ||
600 | \f | |
601 | ||
602 | SCM_DEFINE (scm_memoize_expression, "memoize-expression", 1, 0, 0, | |
603 | (SCM exp), | |
604 | "Memoize the expression @var{exp}.") | |
605 | #define FUNC_NAME s_scm_memoize_expression | |
606 | { | |
a310a1d1 | 607 | SCM_ASSERT_TYPE (SCM_EXPANDED_P (exp), exp, 1, FUNC_NAME, "expanded"); |
7974c579 | 608 | return memoize (scm_convert_assignment (exp), SCM_BOOL_F); |
b7742c6b AW |
609 | } |
610 | #undef FUNC_NAME | |
611 | ||
2cd72a84 | 612 | |
b7742c6b AW |
613 | \f |
614 | ||
b7742c6b AW |
615 | SCM_SYMBOL (sym_placeholder, "_"); |
616 | ||
617 | static SCM unmemoize (SCM expr); | |
618 | ||
619 | static SCM | |
620 | unmemoize_exprs (SCM exprs) | |
621 | { | |
622 | SCM ret, tail; | |
623 | if (scm_is_null (exprs)) | |
624 | return SCM_EOL; | |
625 | ret = scm_list_1 (unmemoize (CAR (exprs))); | |
626 | tail = ret; | |
627 | for (exprs = CDR (exprs); !scm_is_null (exprs); exprs = CDR (exprs)) | |
628 | { | |
629 | SCM_SETCDR (tail, scm_list_1 (unmemoize (CAR (exprs)))); | |
630 | tail = CDR (tail); | |
631 | } | |
632 | return ret; | |
633 | } | |
634 | ||
635 | static SCM | |
636 | unmemoize_bindings (SCM inits) | |
637 | { | |
cfc28c80 AW |
638 | SCM ret = SCM_EOL; |
639 | int n = scm_c_vector_length (inits); | |
640 | ||
641 | while (n--) | |
642 | ret = scm_cons (unmemoize (scm_c_vector_ref (inits, n)), ret); | |
643 | ||
b7742c6b AW |
644 | return ret; |
645 | } | |
646 | ||
647 | static SCM | |
648 | unmemoize_lexical (SCM n) | |
649 | { | |
cfc28c80 AW |
650 | char buf[32]; |
651 | buf[31] = 0; | |
652 | snprintf (buf, 31, "<%u,%u>", scm_to_uint32 (CAR (n)), | |
653 | scm_to_uint32 (CDR (n))); | |
25d50a05 | 654 | return scm_from_utf8_symbol (buf); |
b7742c6b AW |
655 | } |
656 | ||
657 | static SCM | |
658 | unmemoize (const SCM expr) | |
659 | { | |
660 | SCM args; | |
661 | ||
b7742c6b AW |
662 | args = SCM_MEMOIZED_ARGS (expr); |
663 | switch (SCM_MEMOIZED_TAG (expr)) | |
664 | { | |
665 | case SCM_M_APPLY: | |
39caffe7 AW |
666 | return scm_cons (scm_from_latin1_symbol ("apply"), |
667 | unmemoize_exprs (args)); | |
6fc3eae4 AW |
668 | case SCM_M_SEQ: |
669 | return scm_list_3 (scm_sym_begin, unmemoize (CAR (args)), | |
670 | unmemoize (CDR (args))); | |
b7742c6b | 671 | case SCM_M_CALL: |
9331f91c | 672 | return scm_cons (unmemoize (CAR (args)), unmemoize_exprs (CDDR (args))); |
b7742c6b | 673 | case SCM_M_CONT: |
bc056057 AW |
674 | return scm_list_2 (scm_from_latin1_symbol |
675 | ("call-with-current_continuation"), | |
676 | unmemoize (args)); | |
b7742c6b | 677 | case SCM_M_CALL_WITH_VALUES: |
0fcc39a0 | 678 | return scm_list_3 (scm_from_latin1_symbol ("call-with-values"), |
b7742c6b AW |
679 | unmemoize (CAR (args)), unmemoize (CDR (args))); |
680 | case SCM_M_DEFINE: | |
681 | return scm_list_3 (scm_sym_define, CAR (args), unmemoize (CDR (args))); | |
ef47c422 AW |
682 | case SCM_M_CAPTURE_MODULE: |
683 | return scm_list_2 (scm_from_latin1_symbol ("capture-module"), | |
684 | unmemoize (args)); | |
b7742c6b AW |
685 | case SCM_M_IF: |
686 | return scm_list_4 (scm_sym_if, unmemoize (scm_car (args)), | |
687 | unmemoize (scm_cadr (args)), unmemoize (scm_cddr (args))); | |
688 | case SCM_M_LAMBDA: | |
c438cd71 LC |
689 | { |
690 | SCM body = CAR (args), spec = CDDR (args); | |
691 | ||
692 | if (scm_is_null (CDR (spec))) | |
693 | return scm_list_3 (scm_sym_lambda, | |
694 | scm_make_list (CAR (spec), sym_placeholder), | |
695 | unmemoize (CAR (args))); | |
696 | else if (scm_is_null (SCM_CDDR (spec))) | |
697 | { | |
698 | SCM formals = scm_make_list (CAR (spec), sym_placeholder); | |
699 | return scm_list_3 (scm_sym_lambda, | |
700 | scm_is_true (CADR (spec)) | |
701 | ? scm_cons_star (sym_placeholder, formals) | |
702 | : formals, | |
703 | unmemoize (CAR (args))); | |
704 | } | |
705 | else | |
706 | { | |
707 | SCM alt, tail; | |
708 | ||
cfdc8416 | 709 | alt = CADDDR (CDDDR (spec)); |
c438cd71 LC |
710 | if (scm_is_true (alt)) |
711 | tail = CDR (unmemoize (alt)); | |
712 | else | |
713 | tail = SCM_EOL; | |
714 | ||
715 | return scm_cons | |
716 | (sym_case_lambda_star, | |
717 | scm_cons (scm_list_2 (scm_list_5 (CAR (spec), | |
718 | CADR (spec), | |
719 | CADDR (spec), | |
720 | CADDDR (spec), | |
cfdc8416 | 721 | CADR (CDDDR (spec))), |
c438cd71 LC |
722 | unmemoize (body)), |
723 | tail)); | |
724 | } | |
725 | } | |
99fb07e1 AW |
726 | case SCM_M_CAPTURE_ENV: |
727 | return scm_list_3 (scm_from_latin1_symbol ("capture-env"), | |
728 | CAR (args), | |
729 | unmemoize (CDR (args))); | |
b7742c6b AW |
730 | case SCM_M_LET: |
731 | return scm_list_3 (scm_sym_let, | |
732 | unmemoize_bindings (CAR (args)), | |
733 | unmemoize (CDR (args))); | |
734 | case SCM_M_QUOTE: | |
735 | return scm_list_2 (scm_sym_quote, args); | |
736 | case SCM_M_LEXICAL_REF: | |
737 | return unmemoize_lexical (args); | |
738 | case SCM_M_LEXICAL_SET: | |
739 | return scm_list_3 (scm_sym_set_x, unmemoize_lexical (CAR (args)), | |
740 | unmemoize (CDR (args))); | |
741 | case SCM_M_TOPLEVEL_REF: | |
742 | return args; | |
743 | case SCM_M_TOPLEVEL_SET: | |
744 | return scm_list_3 (scm_sym_set_x, CAR (args), unmemoize (CDR (args))); | |
745 | case SCM_M_MODULE_REF: | |
c08899ff AW |
746 | return SCM_VARIABLEP (args) ? args |
747 | : scm_list_3 (scm_is_true (CDDR (args)) ? scm_sym_at : scm_sym_atat, | |
748 | scm_i_finite_list_copy (CAR (args)), | |
749 | CADR (args)); | |
b7742c6b AW |
750 | case SCM_M_MODULE_SET: |
751 | return scm_list_3 (scm_sym_set_x, | |
c08899ff AW |
752 | SCM_VARIABLEP (CDR (args)) ? CDR (args) |
753 | : scm_list_3 (scm_is_true (CDDDR (args)) | |
754 | ? scm_sym_at : scm_sym_atat, | |
755 | scm_i_finite_list_copy (CADR (args)), | |
756 | CADDR (args)), | |
b7742c6b | 757 | unmemoize (CAR (args))); |
1773bc7d AW |
758 | case SCM_M_CALL_WITH_PROMPT: |
759 | return scm_list_4 (scm_from_latin1_symbol ("call-with-prompt"), | |
747022e4 AW |
760 | unmemoize (CAR (args)), |
761 | unmemoize (CADR (args)), | |
762 | unmemoize (CDDR (args))); | |
b7742c6b AW |
763 | default: |
764 | abort (); | |
765 | } | |
766 | } | |
767 | ||
2cd72a84 AW |
768 | |
769 | \f | |
770 | ||
b7742c6b AW |
771 | SCM_DEFINE (scm_unmemoize_expression, "unmemoize-expression", 1, 0, 0, |
772 | (SCM m), | |
773 | "Unmemoize the memoized expression @var{m}.") | |
774 | #define FUNC_NAME s_scm_unmemoize_expression | |
775 | { | |
b7742c6b AW |
776 | return unmemoize (m); |
777 | } | |
778 | #undef FUNC_NAME | |
779 | ||
3149a5b6 AW |
780 | SCM_DEFINE (scm_memoized_typecode, "memoized-typecode", 1, 0, 0, |
781 | (SCM sym), | |
782 | "Return the memoized typecode corresponding to the symbol @var{sym}.") | |
783 | #define FUNC_NAME s_scm_memoized_typecode | |
784 | { | |
785 | int i; | |
786 | ||
787 | SCM_VALIDATE_SYMBOL (1, sym); | |
788 | ||
789 | for (i = 0; i < sizeof(memoized_tags)/sizeof(const char*); i++) | |
790 | if (strcmp (scm_i_symbol_chars (sym), memoized_tags[i]) == 0) | |
791 | return scm_from_int32 (i); | |
792 | ||
793 | return SCM_BOOL_F; | |
794 | } | |
795 | #undef FUNC_NAME | |
796 | ||
797 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); | |
798 | static void error_unbound_variable (SCM symbol) SCM_NORETURN; | |
799 | static void error_unbound_variable (SCM symbol) | |
800 | { | |
801 | scm_error (scm_unbound_variable_key, NULL, "Unbound variable: ~S", | |
802 | scm_list_1 (symbol), SCM_BOOL_F); | |
803 | } | |
804 | ||
805 | SCM_DEFINE (scm_memoize_variable_access_x, "memoize-variable-access!", 2, 0, 0, | |
806 | (SCM m, SCM mod), | |
807 | "Look up and cache the variable that @var{m} will access, returning the variable.") | |
7230aaf9 | 808 | #define FUNC_NAME s_scm_memoize_variable_access_x |
3149a5b6 | 809 | { |
0720f70e AW |
810 | SCM mx = SCM_MEMOIZED_ARGS (m); |
811 | ||
ef47c422 AW |
812 | if (scm_is_false (mod)) |
813 | mod = scm_the_root_module (); | |
814 | ||
3149a5b6 AW |
815 | switch (SCM_MEMOIZED_TAG (m)) |
816 | { | |
817 | case SCM_M_TOPLEVEL_REF: | |
818 | if (SCM_VARIABLEP (mx)) | |
819 | return mx; | |
820 | else | |
821 | { | |
822 | SCM var = scm_module_variable (mod, mx); | |
823 | if (scm_is_false (var) || scm_is_false (scm_variable_bound_p (var))) | |
824 | error_unbound_variable (mx); | |
0720f70e | 825 | SCM_SETCDR (m, var); |
3149a5b6 AW |
826 | return var; |
827 | } | |
828 | ||
829 | case SCM_M_TOPLEVEL_SET: | |
830 | { | |
831 | SCM var = CAR (mx); | |
832 | if (SCM_VARIABLEP (var)) | |
833 | return var; | |
834 | else | |
835 | { | |
836 | var = scm_module_variable (mod, var); | |
837 | if (scm_is_false (var)) | |
838 | error_unbound_variable (CAR (mx)); | |
839 | SCM_SETCAR (mx, var); | |
840 | return var; | |
841 | } | |
842 | } | |
843 | ||
844 | case SCM_M_MODULE_REF: | |
845 | if (SCM_VARIABLEP (mx)) | |
846 | return mx; | |
847 | else | |
848 | { | |
849 | SCM var; | |
850 | mod = scm_resolve_module (CAR (mx)); | |
851 | if (scm_is_true (CDDR (mx))) | |
852 | mod = scm_module_public_interface (mod); | |
853 | var = scm_module_lookup (mod, CADR (mx)); | |
854 | if (scm_is_false (scm_variable_bound_p (var))) | |
855 | error_unbound_variable (CADR (mx)); | |
0720f70e | 856 | SCM_SETCDR (m, var); |
3149a5b6 AW |
857 | return var; |
858 | } | |
859 | ||
860 | case SCM_M_MODULE_SET: | |
861 | /* FIXME: not quite threadsafe */ | |
862 | if (SCM_VARIABLEP (CDR (mx))) | |
863 | return CDR (mx); | |
864 | else | |
865 | { | |
866 | SCM var; | |
867 | mod = scm_resolve_module (CADR (mx)); | |
868 | if (scm_is_true (CDDDR (mx))) | |
869 | mod = scm_module_public_interface (mod); | |
870 | var = scm_module_lookup (mod, CADDR (mx)); | |
871 | SCM_SETCDR (mx, var); | |
872 | return var; | |
873 | } | |
874 | ||
875 | default: | |
876 | scm_wrong_type_arg (FUNC_NAME, 1, m); | |
877 | return SCM_BOOL_F; | |
878 | } | |
879 | } | |
880 | #undef FUNC_NAME | |
881 | ||
b7742c6b AW |
882 | |
883 | \f | |
884 | ||
885 | void | |
886 | scm_init_memoize () | |
887 | { | |
b7742c6b | 888 | #include "libguile/memoize.x" |
4f692ace | 889 | |
bb97e4ab AW |
890 | wind = scm_c_make_gsubr ("wind", 2, 0, 0, do_wind); |
891 | unwind = scm_c_make_gsubr ("unwind", 0, 0, 0, do_unwind); | |
c32b7c4c AW |
892 | push_fluid = scm_c_make_gsubr ("push-fluid", 2, 0, 0, do_push_fluid); |
893 | pop_fluid = scm_c_make_gsubr ("pop-fluid", 0, 0, 0, do_pop_fluid); | |
bb97e4ab | 894 | |
4a655e50 | 895 | list_of_guile = scm_list_1 (scm_from_latin1_symbol ("guile")); |
b7742c6b AW |
896 | } |
897 | ||
898 | /* | |
899 | Local Variables: | |
900 | c-file-style: "gnu" | |
901 | End: | |
902 | */ |