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16ea9620 MV |
1 | /* classes: h_files */ |
2 | ||
3 | #ifndef SCM_INLINE_H | |
4 | #define SCM_INLINE_H | |
5 | ||
3f520967 | 6 | /* Copyright (C) 2001, 2002, 2003, 2004, 2006, 2008 Free Software Foundation, Inc. |
16ea9620 | 7 | * |
73be1d9e MV |
8 | * This library is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
16ea9620 | 12 | * |
73be1d9e | 13 | * This library is distributed in the hope that it will be useful, |
16ea9620 | 14 | * but 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 | |
92205699 | 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 21 | */ |
16ea9620 MV |
22 | |
23 | /* This file is for inline functions. On platforms that don't support | |
24 | inlining functions, they are turned into ordinary functions. See | |
25 | "inline.c". | |
26 | */ | |
27 | ||
1e71eafb | 28 | #include <stdio.h> |
f5c2af4b LC |
29 | #include <string.h> |
30 | ||
31 | #include "libguile/__scm.h" | |
1e71eafb | 32 | |
16ea9620 MV |
33 | #include "libguile/pairs.h" |
34 | #include "libguile/gc.h" | |
9bc4701c | 35 | #include "libguile/threads.h" |
9598a406 | 36 | #include "libguile/unif.h" |
f5c2af4b LC |
37 | #include "libguile/ports.h" |
38 | #include "libguile/error.h" | |
16ea9620 | 39 | |
c8a1bdc4 | 40 | |
979eade6 LC |
41 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
42 | ||
43 | /* GCC has `__inline__' in all modes, including strict ansi. GCC 4.3 and | |
44 | above with `-std=c99' or `-std=gnu99' implements ISO C99 inline semantics, | |
45 | unless `-fgnu89-inline' is used. Here we want GNU "extern inline" | |
46 | semantics, hence the `__gnu_inline__' attribute, in accordance with: | |
47 | http://gcc.gnu.org/gcc-4.3/porting_to.html . | |
48 | ||
49 | With GCC 4.2, `__GNUC_STDC_INLINE__' is never defined (because C99 inline | |
50 | semantics are not supported), but a warning is issued in C99 mode if | |
7dc9ae71 | 51 | `__gnu_inline__' is not used. |
979eade6 | 52 | |
7dc9ae71 LC |
53 | Apple's GCC build >5400 (since Xcode 3.0) doesn't support GNU inline in |
54 | C99 mode and doesn't define `__GNUC_STDC_INLINE__'. Fall back to "static | |
55 | inline" in that case. */ | |
56 | ||
57 | # if (defined __GNUC__) && (!(__APPLE_CC__ > 5400 && __STDC_VERSION__ >= 199901L)) | |
07db6fcd | 58 | # define SCM_C_USE_EXTERN_INLINE 1 |
979eade6 LC |
59 | # if (defined __GNUC_STDC_INLINE__) || (__GNUC__ == 4 && __GNUC_MINOR__ == 2) |
60 | # define SCM_C_EXTERN_INLINE \ | |
61 | extern __inline__ __attribute__ ((__gnu_inline__)) | |
62 | # else | |
63 | # define SCM_C_EXTERN_INLINE extern __inline__ | |
64 | # endif | |
65 | # elif (defined SCM_C_INLINE) | |
66 | # define SCM_C_EXTERN_INLINE static SCM_C_INLINE | |
67 | # endif | |
68 | ||
69 | #endif /* SCM_INLINE_C_INCLUDING_INLINE_H */ | |
70 | ||
71 | ||
07db6fcd LC |
72 | #if (!defined SCM_C_INLINE) || (defined SCM_INLINE_C_INCLUDING_INLINE_H) \ |
73 | || (defined SCM_C_USE_EXTERN_INLINE) | |
16ea9620 | 74 | |
3f520967 | 75 | /* The `extern' declarations. They should only appear when used from |
07db6fcd LC |
76 | "inline.c", when `inline' is not supported at all or when "extern inline" |
77 | is used. */ | |
c8a1bdc4 | 78 | |
e7bca227 | 79 | #include "libguile/boehm-gc.h" |
26224b3f LC |
80 | |
81 | ||
c8a1bdc4 | 82 | SCM_API SCM scm_cell (scm_t_bits car, scm_t_bits cdr); |
53ea4fdf | 83 | SCM_API SCM scm_immutable_cell (scm_t_bits car, scm_t_bits cdr); |
c8a1bdc4 HWN |
84 | SCM_API SCM scm_double_cell (scm_t_bits car, scm_t_bits cbr, |
85 | scm_t_bits ccr, scm_t_bits cdr); | |
86 | ||
9598a406 MV |
87 | SCM_API SCM scm_array_handle_ref (scm_t_array_handle *h, ssize_t pos); |
88 | SCM_API void scm_array_handle_set (scm_t_array_handle *h, ssize_t pos, SCM val); | |
16ea9620 | 89 | |
3f520967 | 90 | SCM_API int scm_is_pair (SCM x); |
60e7529a | 91 | |
f5c2af4b LC |
92 | SCM_API int scm_getc (SCM port); |
93 | SCM_API void scm_putc (char c, SCM port); | |
94 | SCM_API void scm_puts (const char *str_data, SCM port); | |
95 | ||
3f520967 LC |
96 | #endif |
97 | ||
60e7529a | 98 | |
9dca8935 | 99 | #if defined SCM_C_EXTERN_INLINE || defined SCM_INLINE_C_INCLUDING_INLINE_H |
60e7529a RB |
100 | /* either inlining, or being included from inline.c. We use (and |
101 | repeat) this long #if test here and below so that we don't have to | |
102 | introduce any extraneous symbols into the public namespace. We | |
103 | only need SCM_C_INLINE to be seen publically . */ | |
c8a1bdc4 HWN |
104 | |
105 | extern unsigned scm_newcell2_count; | |
106 | extern unsigned scm_newcell_count; | |
107 | ||
979eade6 | 108 | |
9dca8935 | 109 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
979eade6 | 110 | SCM_C_EXTERN_INLINE |
60e7529a | 111 | #endif |
26224b3f | 112 | |
c8a1bdc4 | 113 | SCM |
228a24ef | 114 | scm_cell (scm_t_bits car, scm_t_bits cdr) |
16ea9620 | 115 | { |
378f2625 | 116 | SCM cell = SCM_PACK ((scm_t_bits) (GC_MALLOC (sizeof (scm_t_cell)))); |
c8a1bdc4 | 117 | |
c812243b LC |
118 | /* Initialize the type slot last so that the cell is ignored by the GC |
119 | until it is completely initialized. This is only relevant when the GC | |
120 | can actually run during this code, which it can't since the GC only runs | |
121 | when all other threads are stopped. */ | |
26224b3f | 122 | SCM_GC_SET_CELL_WORD (cell, 1, cdr); |
c812243b | 123 | SCM_GC_SET_CELL_WORD (cell, 0, car); |
16ea9620 | 124 | |
26224b3f | 125 | return cell; |
16ea9620 MV |
126 | } |
127 | ||
53ea4fdf LC |
128 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
129 | SCM_C_EXTERN_INLINE | |
130 | #endif | |
131 | SCM | |
132 | scm_immutable_cell (scm_t_bits car, scm_t_bits cdr) | |
133 | { | |
134 | SCM cell = SCM_PACK ((scm_t_bits) (GC_MALLOC_STUBBORN (sizeof (scm_t_cell)))); | |
135 | ||
136 | /* Initialize the type slot last so that the cell is ignored by the GC | |
137 | until it is completely initialized. This is only relevant when the GC | |
138 | can actually run during this code, which it can't since the GC only runs | |
139 | when all other threads are stopped. */ | |
140 | SCM_GC_SET_CELL_WORD (cell, 1, cdr); | |
141 | SCM_GC_SET_CELL_WORD (cell, 0, car); | |
142 | ||
143 | GC_END_STUBBORN_CHANGE ((void *) cell); | |
144 | ||
145 | return cell; | |
146 | } | |
147 | ||
9dca8935 | 148 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
979eade6 | 149 | SCM_C_EXTERN_INLINE |
60e7529a | 150 | #endif |
c8a1bdc4 | 151 | SCM |
228a24ef DH |
152 | scm_double_cell (scm_t_bits car, scm_t_bits cbr, |
153 | scm_t_bits ccr, scm_t_bits cdr) | |
16ea9620 | 154 | { |
5e1e20c8 | 155 | SCM z; |
c8a1bdc4 | 156 | |
e7bca227 | 157 | z = SCM_PACK ((scm_t_bits) (GC_MALLOC (2 * sizeof (scm_t_cell)))); |
16ea9620 MV |
158 | /* Initialize the type slot last so that the cell is ignored by the |
159 | GC until it is completely initialized. This is only relevant | |
b2a339f6 MV |
160 | when the GC can actually run during this code, which it can't |
161 | since the GC only runs when all other threads are stopped. | |
16ea9620 | 162 | */ |
1fc8902f DH |
163 | SCM_GC_SET_CELL_WORD (z, 1, cbr); |
164 | SCM_GC_SET_CELL_WORD (z, 2, ccr); | |
165 | SCM_GC_SET_CELL_WORD (z, 3, cdr); | |
166 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
16ea9620 | 167 | |
3553e1d1 GH |
168 | /* When this function is inlined, it's possible that the last |
169 | SCM_GC_SET_CELL_WORD above will be adjacent to a following | |
170 | initialization of z. E.g., it occurred in scm_make_real. GCC | |
171 | from around version 3 (e.g., certainly 3.2) began taking | |
172 | advantage of strict C aliasing rules which say that it's OK to | |
173 | interchange the initialization above and the one below when the | |
174 | pointer types appear to differ sufficiently. We don't want that, | |
175 | of course. GCC allows this behaviour to be disabled with the | |
176 | -fno-strict-aliasing option, but would also need to be supplied | |
177 | by Guile users. Instead, the following statements prevent the | |
178 | reordering. | |
179 | */ | |
180 | #ifdef __GNUC__ | |
cb975c21 | 181 | __asm__ volatile ("" : : : "memory"); |
3553e1d1 GH |
182 | #else |
183 | /* portable version, just in case any other compiler does the same | |
184 | thing. */ | |
185 | scm_remember_upto_here_1 (z); | |
c8a1bdc4 | 186 | #endif |
6253f3f1 | 187 | |
c8a1bdc4 HWN |
188 | return z; |
189 | } | |
6253f3f1 | 190 | |
9dca8935 | 191 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
979eade6 | 192 | SCM_C_EXTERN_INLINE |
9598a406 MV |
193 | #endif |
194 | SCM | |
195 | scm_array_handle_ref (scm_t_array_handle *h, ssize_t p) | |
196 | { | |
197 | return h->ref (h, p); | |
198 | } | |
eab1b259 | 199 | |
9dca8935 | 200 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
979eade6 | 201 | SCM_C_EXTERN_INLINE |
9598a406 MV |
202 | #endif |
203 | void | |
204 | scm_array_handle_set (scm_t_array_handle *h, ssize_t p, SCM v) | |
205 | { | |
206 | h->set (h, p, v); | |
207 | } | |
eab1b259 | 208 | |
9dca8935 | 209 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H |
979eade6 | 210 | SCM_C_EXTERN_INLINE |
d5ad4aa6 MV |
211 | #endif |
212 | int | |
213 | scm_is_pair (SCM x) | |
214 | { | |
23f2b9a3 KR |
215 | /* The following "workaround_for_gcc_295" avoids bad code generated by |
216 | i386 gcc 2.95.4 (the Debian packaged 2.95.4-24 at least). | |
217 | ||
218 | Under the default -O2 the inlined SCM_I_CONSP test gets "optimized" so | |
219 | the fetch of the tag word from x is done before confirming it's a | |
220 | non-immediate (SCM_NIMP). Needless to say that bombs badly if x is a | |
221 | immediate. This was seen to afflict scm_srfi1_split_at and something | |
222 | deep in the bowels of ceval(). In both cases segvs resulted from | |
223 | deferencing a random immediate value. srfi-1.test exposes the problem | |
224 | through a short list, the immediate being SCM_EOL in that case. | |
225 | Something in syntax.test exposed the ceval() problem. | |
226 | ||
227 | Just "volatile SCM workaround_for_gcc_295 = lst" is enough to avoid the | |
228 | problem, without even using that variable. The "w=w" is just to | |
229 | prevent a warning about it being unused. | |
230 | */ | |
231 | #if defined (__GNUC__) && __GNUC__ == 2 && __GNUC_MINOR__ == 95 | |
232 | volatile SCM workaround_for_gcc_295 = x; | |
233 | workaround_for_gcc_295 = workaround_for_gcc_295; | |
234 | #endif | |
235 | ||
d5ad4aa6 MV |
236 | return SCM_I_CONSP (x); |
237 | } | |
238 | ||
f5c2af4b LC |
239 | |
240 | /* Port I/O. */ | |
241 | ||
242 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H | |
243 | SCM_C_EXTERN_INLINE | |
244 | #endif | |
245 | int | |
246 | scm_getc (SCM port) | |
247 | { | |
248 | int c; | |
249 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
250 | ||
251 | if (pt->rw_active == SCM_PORT_WRITE) | |
252 | /* may be marginally faster than calling scm_flush. */ | |
253 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
254 | ||
255 | if (pt->rw_random) | |
256 | pt->rw_active = SCM_PORT_READ; | |
257 | ||
258 | if (pt->read_pos >= pt->read_end) | |
259 | { | |
260 | if (scm_fill_input (port) == EOF) | |
261 | return EOF; | |
262 | } | |
263 | ||
264 | c = *(pt->read_pos++); | |
265 | ||
266 | switch (c) | |
267 | { | |
268 | case '\a': | |
269 | break; | |
270 | case '\b': | |
271 | SCM_DECCOL (port); | |
272 | break; | |
273 | case '\n': | |
274 | SCM_INCLINE (port); | |
275 | break; | |
276 | case '\r': | |
277 | SCM_ZEROCOL (port); | |
278 | break; | |
279 | case '\t': | |
280 | SCM_TABCOL (port); | |
281 | break; | |
282 | default: | |
283 | SCM_INCCOL (port); | |
284 | break; | |
285 | } | |
286 | ||
287 | return c; | |
288 | } | |
289 | ||
290 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H | |
291 | SCM_C_EXTERN_INLINE | |
292 | #endif | |
293 | void | |
294 | scm_putc (char c, SCM port) | |
295 | { | |
296 | SCM_ASSERT_TYPE (SCM_OPOUTPORTP (port), port, 0, NULL, "output port"); | |
297 | scm_lfwrite (&c, 1, port); | |
298 | } | |
299 | ||
300 | #ifndef SCM_INLINE_C_INCLUDING_INLINE_H | |
301 | SCM_C_EXTERN_INLINE | |
302 | #endif | |
303 | void | |
304 | scm_puts (const char *s, SCM port) | |
305 | { | |
306 | SCM_ASSERT_TYPE (SCM_OPOUTPORTP (port), port, 0, NULL, "output port"); | |
307 | scm_lfwrite (s, strlen (s), port); | |
308 | } | |
309 | ||
310 | ||
16ea9620 | 311 | #endif |
16ea9620 | 312 | #endif |