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16ea9620 MV |
1 | /* classes: h_files */ |
2 | ||
3 | #ifndef SCM_INLINE_H | |
4 | #define SCM_INLINE_H | |
5 | ||
e809758a | 6 | /* Copyright (C) 2001, 2002, 2003, 2004, 2006, 2008, 2009, 2010 Free Software Foundation, Inc. |
16ea9620 | 7 | * |
73be1d9e | 8 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
9 | * modify it under the terms of the GNU Lesser General Public License |
10 | * as published by the Free Software Foundation; either version 3 of | |
11 | * the License, or (at your option) any later version. | |
16ea9620 | 12 | * |
53befeb7 NJ |
13 | * This library is distributed in the hope that it will be useful, but |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Lesser General Public License for more details. | |
16ea9620 | 17 | * |
73be1d9e MV |
18 | * You should have received a copy of the GNU Lesser General Public |
19 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
21 | * 02110-1301 USA | |
73be1d9e | 22 | */ |
16ea9620 MV |
23 | |
24 | /* This file is for inline functions. On platforms that don't support | |
25 | inlining functions, they are turned into ordinary functions. See | |
26 | "inline.c". | |
27 | */ | |
28 | ||
1e71eafb | 29 | #include <stdio.h> |
f5c2af4b LC |
30 | #include <string.h> |
31 | ||
32 | #include "libguile/__scm.h" | |
1e71eafb | 33 | |
16ea9620 MV |
34 | #include "libguile/pairs.h" |
35 | #include "libguile/gc.h" | |
9bc4701c | 36 | #include "libguile/threads.h" |
2a610be5 | 37 | #include "libguile/array-handle.h" |
f5c2af4b | 38 | #include "libguile/ports.h" |
2a610be5 | 39 | #include "libguile/numbers.h" |
f5c2af4b | 40 | #include "libguile/error.h" |
16ea9620 | 41 | |
c8a1bdc4 | 42 | |
979eade6 LC |
43 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
44 | ||
45 | /* GCC has `__inline__' in all modes, including strict ansi. GCC 4.3 and | |
46 | above with `-std=c99' or `-std=gnu99' implements ISO C99 inline semantics, | |
47 | unless `-fgnu89-inline' is used. Here we want GNU "extern inline" | |
48 | semantics, hence the `__gnu_inline__' attribute, in accordance with: | |
49 | http://gcc.gnu.org/gcc-4.3/porting_to.html . | |
50 | ||
51 | With GCC 4.2, `__GNUC_STDC_INLINE__' is never defined (because C99 inline | |
52 | semantics are not supported), but a warning is issued in C99 mode if | |
7dc9ae71 | 53 | `__gnu_inline__' is not used. |
979eade6 | 54 | |
7dc9ae71 LC |
55 | Apple's GCC build >5400 (since Xcode 3.0) doesn't support GNU inline in |
56 | C99 mode and doesn't define `__GNUC_STDC_INLINE__'. Fall back to "static | |
57 | inline" in that case. */ | |
58 | ||
95a040cd | 59 | # if (defined __GNUC__) && (!(((defined __APPLE_CC__) && (__APPLE_CC__ > 5400)) && __STDC_VERSION__ >= 199901L)) |
07db6fcd | 60 | # define SCM_C_USE_EXTERN_INLINE 1 |
979eade6 LC |
61 | # if (defined __GNUC_STDC_INLINE__) || (__GNUC__ == 4 && __GNUC_MINOR__ == 2) |
62 | # define SCM_C_EXTERN_INLINE \ | |
63 | extern __inline__ __attribute__ ((__gnu_inline__)) | |
64 | # else | |
65 | # define SCM_C_EXTERN_INLINE extern __inline__ | |
66 | # endif | |
67 | # elif (defined SCM_C_INLINE) | |
68 | # define SCM_C_EXTERN_INLINE static SCM_C_INLINE | |
69 | # endif | |
70 | ||
71 | #endif /* SCM_INLINE_C_INCLUDING_INLINE_H */ | |
72 | ||
73 | ||
07db6fcd LC |
74 | #if (!defined SCM_C_INLINE) || (defined SCM_INLINE_C_INCLUDING_INLINE_H) \ |
75 | || (defined SCM_C_USE_EXTERN_INLINE) | |
16ea9620 | 76 | |
3f520967 | 77 | /* The `extern' declarations. They should only appear when used from |
07db6fcd LC |
78 | "inline.c", when `inline' is not supported at all or when "extern inline" |
79 | is used. */ | |
c8a1bdc4 | 80 | |
1c44468d | 81 | #include "libguile/bdw-gc.h" |
26224b3f LC |
82 | |
83 | ||
c8a1bdc4 | 84 | SCM_API SCM scm_cell (scm_t_bits car, scm_t_bits cdr); |
53ea4fdf | 85 | SCM_API SCM scm_immutable_cell (scm_t_bits car, scm_t_bits cdr); |
c8a1bdc4 HWN |
86 | SCM_API SCM scm_double_cell (scm_t_bits car, scm_t_bits cbr, |
87 | scm_t_bits ccr, scm_t_bits cdr); | |
737219dd LC |
88 | SCM_API SCM scm_immutable_double_cell (scm_t_bits car, scm_t_bits cbr, |
89 | scm_t_bits ccr, scm_t_bits cdr); | |
e809758a AW |
90 | SCM_API SCM scm_words (scm_t_bits car, scm_t_uint16 n_words); |
91 | /* no immutable words for now, would require initialization at the same time as | |
92 | allocation */ | |
c8a1bdc4 | 93 | |
9598a406 MV |
94 | SCM_API SCM scm_array_handle_ref (scm_t_array_handle *h, ssize_t pos); |
95 | SCM_API void scm_array_handle_set (scm_t_array_handle *h, ssize_t pos, SCM val); | |
16ea9620 | 96 | |
3f520967 | 97 | SCM_API int scm_is_pair (SCM x); |
6bf623ca | 98 | SCM_API int scm_is_string (SCM x); |
60e7529a | 99 | |
889975e5 | 100 | SCM_API int scm_get_byte_or_eof (SCM port); |
f5c2af4b LC |
101 | SCM_API void scm_putc (char c, SCM port); |
102 | SCM_API void scm_puts (const char *str_data, SCM port); | |
103 | ||
3f520967 LC |
104 | #endif |
105 | ||
60e7529a | 106 | |
9dca8935 | 107 | #if defined SCM_C_EXTERN_INLINE || defined SCM_INLINE_C_INCLUDING_INLINE_H |
60e7529a RB |
108 | /* either inlining, or being included from inline.c. We use (and |
109 | repeat) this long #if test here and below so that we don't have to | |
110 | introduce any extraneous symbols into the public namespace. We | |
111 | only need SCM_C_INLINE to be seen publically . */ | |
c8a1bdc4 HWN |
112 | |
113 | extern unsigned scm_newcell2_count; | |
114 | extern unsigned scm_newcell_count; | |
115 | ||
979eade6 | 116 | |
9dca8935 | 117 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
979eade6 | 118 | SCM_C_EXTERN_INLINE |
60e7529a | 119 | #endif |
26224b3f | 120 | |
c8a1bdc4 | 121 | SCM |
228a24ef | 122 | scm_cell (scm_t_bits car, scm_t_bits cdr) |
16ea9620 | 123 | { |
378f2625 | 124 | SCM cell = SCM_PACK ((scm_t_bits) (GC_MALLOC (sizeof (scm_t_cell)))); |
c8a1bdc4 | 125 | |
c812243b LC |
126 | /* Initialize the type slot last so that the cell is ignored by the GC |
127 | until it is completely initialized. This is only relevant when the GC | |
128 | can actually run during this code, which it can't since the GC only runs | |
129 | when all other threads are stopped. */ | |
26224b3f | 130 | SCM_GC_SET_CELL_WORD (cell, 1, cdr); |
c812243b | 131 | SCM_GC_SET_CELL_WORD (cell, 0, car); |
16ea9620 | 132 | |
26224b3f | 133 | return cell; |
16ea9620 MV |
134 | } |
135 | ||
53ea4fdf LC |
136 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
137 | SCM_C_EXTERN_INLINE | |
138 | #endif | |
139 | SCM | |
140 | scm_immutable_cell (scm_t_bits car, scm_t_bits cdr) | |
141 | { | |
142 | SCM cell = SCM_PACK ((scm_t_bits) (GC_MALLOC_STUBBORN (sizeof (scm_t_cell)))); | |
143 | ||
144 | /* Initialize the type slot last so that the cell is ignored by the GC | |
145 | until it is completely initialized. This is only relevant when the GC | |
146 | can actually run during this code, which it can't since the GC only runs | |
147 | when all other threads are stopped. */ | |
148 | SCM_GC_SET_CELL_WORD (cell, 1, cdr); | |
149 | SCM_GC_SET_CELL_WORD (cell, 0, car); | |
150 | ||
151 | GC_END_STUBBORN_CHANGE ((void *) cell); | |
152 | ||
153 | return cell; | |
154 | } | |
155 | ||
9dca8935 | 156 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
979eade6 | 157 | SCM_C_EXTERN_INLINE |
60e7529a | 158 | #endif |
c8a1bdc4 | 159 | SCM |
228a24ef DH |
160 | scm_double_cell (scm_t_bits car, scm_t_bits cbr, |
161 | scm_t_bits ccr, scm_t_bits cdr) | |
16ea9620 | 162 | { |
5e1e20c8 | 163 | SCM z; |
c8a1bdc4 | 164 | |
e7bca227 | 165 | z = SCM_PACK ((scm_t_bits) (GC_MALLOC (2 * sizeof (scm_t_cell)))); |
16ea9620 MV |
166 | /* Initialize the type slot last so that the cell is ignored by the |
167 | GC until it is completely initialized. This is only relevant | |
b2a339f6 MV |
168 | when the GC can actually run during this code, which it can't |
169 | since the GC only runs when all other threads are stopped. | |
16ea9620 | 170 | */ |
1fc8902f DH |
171 | SCM_GC_SET_CELL_WORD (z, 1, cbr); |
172 | SCM_GC_SET_CELL_WORD (z, 2, ccr); | |
173 | SCM_GC_SET_CELL_WORD (z, 3, cdr); | |
174 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
16ea9620 | 175 | |
737219dd LC |
176 | /* When this function is inlined, it's possible that the last |
177 | SCM_GC_SET_CELL_WORD above will be adjacent to a following | |
178 | initialization of z. E.g., it occurred in scm_make_real. GCC | |
179 | from around version 3 (e.g., certainly 3.2) began taking | |
180 | advantage of strict C aliasing rules which say that it's OK to | |
181 | interchange the initialization above and the one below when the | |
182 | pointer types appear to differ sufficiently. We don't want that, | |
183 | of course. GCC allows this behaviour to be disabled with the | |
184 | -fno-strict-aliasing option, but would also need to be supplied | |
185 | by Guile users. Instead, the following statements prevent the | |
186 | reordering. | |
187 | */ | |
188 | #ifdef __GNUC__ | |
189 | __asm__ volatile ("" : : : "memory"); | |
190 | #else | |
191 | /* portable version, just in case any other compiler does the same | |
192 | thing. */ | |
193 | scm_remember_upto_here_1 (z); | |
194 | #endif | |
195 | ||
196 | return z; | |
197 | } | |
198 | ||
199 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H | |
200 | SCM_C_EXTERN_INLINE | |
201 | #endif | |
202 | SCM | |
203 | scm_immutable_double_cell (scm_t_bits car, scm_t_bits cbr, | |
204 | scm_t_bits ccr, scm_t_bits cdr) | |
205 | { | |
206 | SCM z; | |
207 | ||
208 | z = SCM_PACK ((scm_t_bits) (GC_MALLOC_STUBBORN (2 * sizeof (scm_t_cell)))); | |
209 | /* Initialize the type slot last so that the cell is ignored by the | |
210 | GC until it is completely initialized. This is only relevant | |
211 | when the GC can actually run during this code, which it can't | |
212 | since the GC only runs when all other threads are stopped. | |
213 | */ | |
214 | SCM_GC_SET_CELL_WORD (z, 1, cbr); | |
215 | SCM_GC_SET_CELL_WORD (z, 2, ccr); | |
216 | SCM_GC_SET_CELL_WORD (z, 3, cdr); | |
217 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
218 | ||
219 | GC_END_STUBBORN_CHANGE ((void *) z); | |
220 | ||
3553e1d1 GH |
221 | /* When this function is inlined, it's possible that the last |
222 | SCM_GC_SET_CELL_WORD above will be adjacent to a following | |
223 | initialization of z. E.g., it occurred in scm_make_real. GCC | |
224 | from around version 3 (e.g., certainly 3.2) began taking | |
225 | advantage of strict C aliasing rules which say that it's OK to | |
226 | interchange the initialization above and the one below when the | |
227 | pointer types appear to differ sufficiently. We don't want that, | |
228 | of course. GCC allows this behaviour to be disabled with the | |
229 | -fno-strict-aliasing option, but would also need to be supplied | |
230 | by Guile users. Instead, the following statements prevent the | |
231 | reordering. | |
232 | */ | |
233 | #ifdef __GNUC__ | |
e809758a AW |
234 | __asm__ volatile ("" : : : "memory"); |
235 | #else | |
236 | /* portable version, just in case any other compiler does the same | |
237 | thing. */ | |
238 | scm_remember_upto_here_1 (z); | |
239 | #endif | |
240 | ||
241 | return z; | |
242 | } | |
243 | ||
244 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H | |
245 | SCM_C_EXTERN_INLINE | |
246 | #endif | |
247 | SCM | |
248 | scm_words (scm_t_bits car, scm_t_uint16 n_words) | |
249 | { | |
250 | SCM z; | |
251 | ||
252 | z = SCM_PACK ((scm_t_bits) (GC_MALLOC (sizeof (scm_t_bits) * n_words))); | |
253 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
254 | ||
255 | /* FIXME: is the following concern even relevant with BDW-GC? */ | |
256 | ||
257 | /* When this function is inlined, it's possible that the last | |
258 | SCM_GC_SET_CELL_WORD above will be adjacent to a following | |
259 | initialization of z. E.g., it occurred in scm_make_real. GCC | |
260 | from around version 3 (e.g., certainly 3.2) began taking | |
261 | advantage of strict C aliasing rules which say that it's OK to | |
262 | interchange the initialization above and the one below when the | |
263 | pointer types appear to differ sufficiently. We don't want that, | |
264 | of course. GCC allows this behaviour to be disabled with the | |
265 | -fno-strict-aliasing option, but would also need to be supplied | |
266 | by Guile users. Instead, the following statements prevent the | |
267 | reordering. | |
268 | */ | |
269 | #ifdef __GNUC__ | |
cb975c21 | 270 | __asm__ volatile ("" : : : "memory"); |
3553e1d1 GH |
271 | #else |
272 | /* portable version, just in case any other compiler does the same | |
273 | thing. */ | |
274 | scm_remember_upto_here_1 (z); | |
c8a1bdc4 | 275 | #endif |
6253f3f1 | 276 | |
c8a1bdc4 HWN |
277 | return z; |
278 | } | |
6253f3f1 | 279 | |
9dca8935 | 280 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
979eade6 | 281 | SCM_C_EXTERN_INLINE |
9598a406 MV |
282 | #endif |
283 | SCM | |
284 | scm_array_handle_ref (scm_t_array_handle *h, ssize_t p) | |
285 | { | |
6d7c4402 | 286 | if (SCM_UNLIKELY (p < 0 && ((size_t)-p) > h->base)) |
2a610be5 AW |
287 | /* catch overflow */ |
288 | scm_out_of_range (NULL, scm_from_ssize_t (p)); | |
289 | /* perhaps should catch overflow here too */ | |
290 | return h->impl->vref (h, h->base + p); | |
9598a406 | 291 | } |
eab1b259 | 292 | |
9dca8935 | 293 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
979eade6 | 294 | SCM_C_EXTERN_INLINE |
9598a406 MV |
295 | #endif |
296 | void | |
297 | scm_array_handle_set (scm_t_array_handle *h, ssize_t p, SCM v) | |
298 | { | |
3245c0fb | 299 | if (SCM_UNLIKELY (p < 0 && ((size_t)-p) > h->base)) |
2a610be5 AW |
300 | /* catch overflow */ |
301 | scm_out_of_range (NULL, scm_from_ssize_t (p)); | |
302 | /* perhaps should catch overflow here too */ | |
303 | h->impl->vset (h, h->base + p, v); | |
9598a406 | 304 | } |
eab1b259 | 305 | |
9dca8935 | 306 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
979eade6 | 307 | SCM_C_EXTERN_INLINE |
d5ad4aa6 MV |
308 | #endif |
309 | int | |
310 | scm_is_pair (SCM x) | |
311 | { | |
23f2b9a3 KR |
312 | /* The following "workaround_for_gcc_295" avoids bad code generated by |
313 | i386 gcc 2.95.4 (the Debian packaged 2.95.4-24 at least). | |
314 | ||
315 | Under the default -O2 the inlined SCM_I_CONSP test gets "optimized" so | |
316 | the fetch of the tag word from x is done before confirming it's a | |
317 | non-immediate (SCM_NIMP). Needless to say that bombs badly if x is a | |
318 | immediate. This was seen to afflict scm_srfi1_split_at and something | |
319 | deep in the bowels of ceval(). In both cases segvs resulted from | |
320 | deferencing a random immediate value. srfi-1.test exposes the problem | |
321 | through a short list, the immediate being SCM_EOL in that case. | |
322 | Something in syntax.test exposed the ceval() problem. | |
323 | ||
324 | Just "volatile SCM workaround_for_gcc_295 = lst" is enough to avoid the | |
325 | problem, without even using that variable. The "w=w" is just to | |
326 | prevent a warning about it being unused. | |
327 | */ | |
328 | #if defined (__GNUC__) && __GNUC__ == 2 && __GNUC_MINOR__ == 95 | |
329 | volatile SCM workaround_for_gcc_295 = x; | |
330 | workaround_for_gcc_295 = workaround_for_gcc_295; | |
331 | #endif | |
332 | ||
d5ad4aa6 MV |
333 | return SCM_I_CONSP (x); |
334 | } | |
335 | ||
183f7849 LC |
336 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
337 | SCM_C_EXTERN_INLINE | |
338 | #endif | |
339 | int | |
340 | scm_is_string (SCM x) | |
341 | { | |
342 | return SCM_NIMP (x) && (SCM_TYP7 (x) == scm_tc7_string); | |
343 | } | |
f5c2af4b LC |
344 | |
345 | /* Port I/O. */ | |
346 | ||
347 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H | |
348 | SCM_C_EXTERN_INLINE | |
349 | #endif | |
350 | int | |
889975e5 | 351 | scm_get_byte_or_eof (SCM port) |
f5c2af4b LC |
352 | { |
353 | int c; | |
354 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
355 | ||
356 | if (pt->rw_active == SCM_PORT_WRITE) | |
357 | /* may be marginally faster than calling scm_flush. */ | |
358 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
359 | ||
360 | if (pt->rw_random) | |
361 | pt->rw_active = SCM_PORT_READ; | |
362 | ||
363 | if (pt->read_pos >= pt->read_end) | |
364 | { | |
365 | if (scm_fill_input (port) == EOF) | |
366 | return EOF; | |
367 | } | |
368 | ||
369 | c = *(pt->read_pos++); | |
370 | ||
f5c2af4b LC |
371 | return c; |
372 | } | |
373 | ||
374 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H | |
375 | SCM_C_EXTERN_INLINE | |
376 | #endif | |
377 | void | |
378 | scm_putc (char c, SCM port) | |
379 | { | |
380 | SCM_ASSERT_TYPE (SCM_OPOUTPORTP (port), port, 0, NULL, "output port"); | |
381 | scm_lfwrite (&c, 1, port); | |
382 | } | |
383 | ||
384 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H | |
385 | SCM_C_EXTERN_INLINE | |
386 | #endif | |
387 | void | |
388 | scm_puts (const char *s, SCM port) | |
389 | { | |
390 | SCM_ASSERT_TYPE (SCM_OPOUTPORTP (port), port, 0, NULL, "output port"); | |
391 | scm_lfwrite (s, strlen (s), port); | |
392 | } | |
393 | ||
394 | ||
16ea9620 | 395 | #endif |
16ea9620 | 396 | #endif |