Commit | Line | Data |
---|---|---|
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 | ||
60e7529a | 28 | #include "libguile/__scm.h" |
c8a1bdc4 | 29 | |
1e71eafb HWN |
30 | #if (SCM_DEBUG_CELL_ACCESSES == 1) |
31 | #include <stdio.h> | |
1e71eafb HWN |
32 | #endif |
33 | ||
16ea9620 MV |
34 | #include "libguile/pairs.h" |
35 | #include "libguile/gc.h" | |
9bc4701c | 36 | #include "libguile/threads.h" |
9598a406 | 37 | #include "libguile/unif.h" |
d5ad4aa6 | 38 | #include "libguile/pairs.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 | |
51 | `__gnu_inline__' is not used. */ | |
52 | ||
53 | # ifdef __GNUC__ | |
54 | # if (defined __GNUC_STDC_INLINE__) || (__GNUC__ == 4 && __GNUC_MINOR__ == 2) | |
55 | # define SCM_C_EXTERN_INLINE \ | |
56 | extern __inline__ __attribute__ ((__gnu_inline__)) | |
57 | # else | |
58 | # define SCM_C_EXTERN_INLINE extern __inline__ | |
59 | # endif | |
60 | # elif (defined SCM_C_INLINE) | |
61 | # define SCM_C_EXTERN_INLINE static SCM_C_INLINE | |
62 | # endif | |
63 | ||
64 | #endif /* SCM_INLINE_C_INCLUDING_INLINE_H */ | |
65 | ||
66 | ||
3f520967 LC |
67 | #if ((!defined SCM_C_INLINE) && (!defined SCM_INLINE_C_INCLUDING_INLINE_H)) \ |
68 | || (defined __GNUC__) | |
69 | ||
70 | /* The `extern' declarations. They should only appear when used from | |
71 | "inline.c", when `inline' is not supported at all or when GCC's "extern | |
72 | inline" is used. */ | |
73 | ||
c8a1bdc4 HWN |
74 | SCM_API SCM scm_cell (scm_t_bits car, scm_t_bits cdr); |
75 | SCM_API SCM scm_double_cell (scm_t_bits car, scm_t_bits cbr, | |
76 | scm_t_bits ccr, scm_t_bits cdr); | |
77 | ||
9598a406 MV |
78 | SCM_API SCM scm_array_handle_ref (scm_t_array_handle *h, ssize_t pos); |
79 | SCM_API void scm_array_handle_set (scm_t_array_handle *h, ssize_t pos, SCM val); | |
16ea9620 | 80 | |
3f520967 LC |
81 | SCM_API int scm_is_pair (SCM x); |
82 | ||
83 | #endif | |
84 | ||
60e7529a RB |
85 | |
86 | #if defined SCM_C_INLINE || defined SCM_INLINE_C_INCLUDING_INLINE_H | |
87 | /* either inlining, or being included from inline.c. We use (and | |
88 | repeat) this long #if test here and below so that we don't have to | |
89 | introduce any extraneous symbols into the public namespace. We | |
90 | only need SCM_C_INLINE to be seen publically . */ | |
c8a1bdc4 HWN |
91 | |
92 | extern unsigned scm_newcell2_count; | |
93 | extern unsigned scm_newcell_count; | |
94 | ||
979eade6 LC |
95 | |
96 | #if defined SCM_C_EXTERN_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H | |
97 | SCM_C_EXTERN_INLINE | |
60e7529a | 98 | #endif |
c8a1bdc4 | 99 | SCM |
228a24ef | 100 | scm_cell (scm_t_bits car, scm_t_bits cdr) |
16ea9620 MV |
101 | { |
102 | SCM z; | |
9bc4701c | 103 | SCM *freelist = SCM_FREELIST_LOC (scm_i_freelist); |
16ea9620 | 104 | |
d2e53ed6 | 105 | if (scm_is_null (*freelist)) |
9bc4701c | 106 | z = scm_gc_for_newcell (&scm_i_master_freelist, freelist); |
c8a1bdc4 | 107 | else |
16ea9620 | 108 | { |
9bc4701c MD |
109 | z = *freelist; |
110 | *freelist = SCM_FREE_CELL_CDR (*freelist); | |
16ea9620 | 111 | } |
c8a1bdc4 HWN |
112 | |
113 | /* | |
114 | We update scm_cells_allocated from this function. If we don't | |
115 | update this explicitly, we will have to walk a freelist somewhere | |
116 | later on, which seems a lot more expensive. | |
117 | */ | |
118 | scm_cells_allocated += 1; | |
119 | ||
120 | #if (SCM_DEBUG_CELL_ACCESSES == 1) | |
121 | if (scm_debug_cell_accesses_p) | |
1e71eafb HWN |
122 | { |
123 | if (SCM_GC_MARK_P (z)) | |
124 | { | |
125 | fprintf(stderr, "scm_cell tried to allocate a marked cell.\n"); | |
126 | abort(); | |
127 | } | |
6b69393d | 128 | else if (SCM_GC_CELL_WORD(z, 0) != scm_tc_free_cell) |
1e71eafb HWN |
129 | { |
130 | fprintf(stderr, "cell from freelist is not a free cell.\n"); | |
131 | abort(); | |
132 | } | |
133 | } | |
134 | ||
135 | /* | |
136 | Always set mark. Otherwise cells that are alloced before | |
137 | scm_debug_cell_accesses_p is toggled seem invalid. | |
138 | */ | |
139 | SCM_SET_GC_MARK (z); | |
140 | ||
141 | /* | |
142 | TODO: figure out if this use of mark bits is valid with | |
143 | threading. What if another thread is doing GC at this point | |
144 | ... ? | |
145 | */ | |
c8a1bdc4 | 146 | |
c8a1bdc4 | 147 | #endif |
16ea9620 | 148 | |
c8a1bdc4 | 149 | |
16ea9620 MV |
150 | /* Initialize the type slot last so that the cell is ignored by the |
151 | GC until it is completely initialized. This is only relevant | |
b2a339f6 MV |
152 | when the GC can actually run during this code, which it can't |
153 | since the GC only runs when all other threads are stopped. | |
16ea9620 | 154 | */ |
1fc8902f DH |
155 | SCM_GC_SET_CELL_WORD (z, 1, cdr); |
156 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
16ea9620 | 157 | |
eab1b259 HWN |
158 | #if (SCM_DEBUG_CELL_ACCESSES == 1) |
159 | if (scm_expensive_debug_cell_accesses_p ) | |
160 | scm_i_expensive_validation_check (z); | |
161 | #endif | |
c8a1bdc4 | 162 | |
16ea9620 MV |
163 | return z; |
164 | } | |
165 | ||
979eade6 LC |
166 | #if defined SCM_C_EXTERN_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
167 | SCM_C_EXTERN_INLINE | |
60e7529a | 168 | #endif |
c8a1bdc4 | 169 | SCM |
228a24ef DH |
170 | scm_double_cell (scm_t_bits car, scm_t_bits cbr, |
171 | scm_t_bits ccr, scm_t_bits cdr) | |
16ea9620 | 172 | { |
5e1e20c8 MV |
173 | SCM z; |
174 | SCM *freelist = SCM_FREELIST_LOC (scm_i_freelist2); | |
175 | ||
d2e53ed6 | 176 | if (scm_is_null (*freelist)) |
9bc4701c | 177 | z = scm_gc_for_newcell (&scm_i_master_freelist2, freelist); |
16ea9620 MV |
178 | else |
179 | { | |
9bc4701c MD |
180 | z = *freelist; |
181 | *freelist = SCM_FREE_CELL_CDR (*freelist); | |
16ea9620 MV |
182 | } |
183 | ||
c8a1bdc4 HWN |
184 | scm_cells_allocated += 2; |
185 | ||
16ea9620 MV |
186 | /* Initialize the type slot last so that the cell is ignored by the |
187 | GC until it is completely initialized. This is only relevant | |
b2a339f6 MV |
188 | when the GC can actually run during this code, which it can't |
189 | since the GC only runs when all other threads are stopped. | |
16ea9620 | 190 | */ |
1fc8902f DH |
191 | SCM_GC_SET_CELL_WORD (z, 1, cbr); |
192 | SCM_GC_SET_CELL_WORD (z, 2, ccr); | |
193 | SCM_GC_SET_CELL_WORD (z, 3, cdr); | |
194 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
16ea9620 | 195 | |
c8a1bdc4 HWN |
196 | #if (SCM_DEBUG_CELL_ACCESSES == 1) |
197 | if (scm_debug_cell_accesses_p) | |
198 | { | |
199 | if (SCM_GC_MARK_P (z)) | |
200 | { | |
201 | fprintf(stderr, | |
202 | "scm_double_cell tried to allocate a marked cell.\n"); | |
203 | abort(); | |
204 | } | |
c8a1bdc4 | 205 | } |
4ad0814a HWN |
206 | |
207 | /* see above. */ | |
208 | SCM_SET_GC_MARK (z); | |
209 | ||
3553e1d1 GH |
210 | #endif |
211 | ||
212 | /* When this function is inlined, it's possible that the last | |
213 | SCM_GC_SET_CELL_WORD above will be adjacent to a following | |
214 | initialization of z. E.g., it occurred in scm_make_real. GCC | |
215 | from around version 3 (e.g., certainly 3.2) began taking | |
216 | advantage of strict C aliasing rules which say that it's OK to | |
217 | interchange the initialization above and the one below when the | |
218 | pointer types appear to differ sufficiently. We don't want that, | |
219 | of course. GCC allows this behaviour to be disabled with the | |
220 | -fno-strict-aliasing option, but would also need to be supplied | |
221 | by Guile users. Instead, the following statements prevent the | |
222 | reordering. | |
223 | */ | |
224 | #ifdef __GNUC__ | |
cb975c21 | 225 | __asm__ volatile ("" : : : "memory"); |
3553e1d1 GH |
226 | #else |
227 | /* portable version, just in case any other compiler does the same | |
228 | thing. */ | |
229 | scm_remember_upto_here_1 (z); | |
c8a1bdc4 | 230 | #endif |
6253f3f1 | 231 | |
c8a1bdc4 HWN |
232 | return z; |
233 | } | |
6253f3f1 | 234 | |
979eade6 LC |
235 | #if defined SCM_C_EXTERN_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
236 | SCM_C_EXTERN_INLINE | |
9598a406 MV |
237 | #endif |
238 | SCM | |
239 | scm_array_handle_ref (scm_t_array_handle *h, ssize_t p) | |
240 | { | |
241 | return h->ref (h, p); | |
242 | } | |
eab1b259 | 243 | |
979eade6 LC |
244 | #if defined SCM_C_EXTERN_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
245 | SCM_C_EXTERN_INLINE | |
9598a406 MV |
246 | #endif |
247 | void | |
248 | scm_array_handle_set (scm_t_array_handle *h, ssize_t p, SCM v) | |
249 | { | |
250 | h->set (h, p, v); | |
251 | } | |
eab1b259 | 252 | |
979eade6 LC |
253 | #if defined SCM_C_EXTERN_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
254 | SCM_C_EXTERN_INLINE | |
d5ad4aa6 MV |
255 | #endif |
256 | int | |
257 | scm_is_pair (SCM x) | |
258 | { | |
23f2b9a3 KR |
259 | /* The following "workaround_for_gcc_295" avoids bad code generated by |
260 | i386 gcc 2.95.4 (the Debian packaged 2.95.4-24 at least). | |
261 | ||
262 | Under the default -O2 the inlined SCM_I_CONSP test gets "optimized" so | |
263 | the fetch of the tag word from x is done before confirming it's a | |
264 | non-immediate (SCM_NIMP). Needless to say that bombs badly if x is a | |
265 | immediate. This was seen to afflict scm_srfi1_split_at and something | |
266 | deep in the bowels of ceval(). In both cases segvs resulted from | |
267 | deferencing a random immediate value. srfi-1.test exposes the problem | |
268 | through a short list, the immediate being SCM_EOL in that case. | |
269 | Something in syntax.test exposed the ceval() problem. | |
270 | ||
271 | Just "volatile SCM workaround_for_gcc_295 = lst" is enough to avoid the | |
272 | problem, without even using that variable. The "w=w" is just to | |
273 | prevent a warning about it being unused. | |
274 | */ | |
275 | #if defined (__GNUC__) && __GNUC__ == 2 && __GNUC_MINOR__ == 95 | |
276 | volatile SCM workaround_for_gcc_295 = x; | |
277 | workaround_for_gcc_295 = workaround_for_gcc_295; | |
278 | #endif | |
279 | ||
d5ad4aa6 MV |
280 | return SCM_I_CONSP (x); |
281 | } | |
282 | ||
16ea9620 | 283 | #endif |
16ea9620 | 284 | #endif |