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16ea9620 MV |
1 | /* classes: h_files */ |
2 | ||
3 | #ifndef SCM_INLINE_H | |
4 | #define SCM_INLINE_H | |
5 | ||
d2e53ed6 | 6 | /* Copyright (C) 2001, 2002, 2003, 2004 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 HWN |
40 | |
41 | SCM_API SCM scm_cell (scm_t_bits car, scm_t_bits cdr); | |
42 | SCM_API SCM scm_double_cell (scm_t_bits car, scm_t_bits cbr, | |
43 | scm_t_bits ccr, scm_t_bits cdr); | |
44 | ||
9598a406 MV |
45 | SCM_API SCM scm_array_handle_ref (scm_t_array_handle *h, ssize_t pos); |
46 | SCM_API void scm_array_handle_set (scm_t_array_handle *h, ssize_t pos, SCM val); | |
16ea9620 | 47 | |
60e7529a RB |
48 | |
49 | #if defined SCM_C_INLINE || defined SCM_INLINE_C_INCLUDING_INLINE_H | |
50 | /* either inlining, or being included from inline.c. We use (and | |
51 | repeat) this long #if test here and below so that we don't have to | |
52 | introduce any extraneous symbols into the public namespace. We | |
53 | only need SCM_C_INLINE to be seen publically . */ | |
c8a1bdc4 HWN |
54 | |
55 | extern unsigned scm_newcell2_count; | |
56 | extern unsigned scm_newcell_count; | |
57 | ||
60e7529a RB |
58 | #if defined SCM_C_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
59 | /* definitely inlining */ | |
2b2c6fca MV |
60 | #ifdef __GNUC__ |
61 | extern | |
62 | #else | |
63 | static | |
64 | #endif | |
65 | SCM_C_INLINE | |
60e7529a | 66 | #endif |
c8a1bdc4 | 67 | SCM |
228a24ef | 68 | scm_cell (scm_t_bits car, scm_t_bits cdr) |
16ea9620 MV |
69 | { |
70 | SCM z; | |
9bc4701c | 71 | SCM *freelist = SCM_FREELIST_LOC (scm_i_freelist); |
16ea9620 | 72 | |
d2e53ed6 | 73 | if (scm_is_null (*freelist)) |
9bc4701c | 74 | z = scm_gc_for_newcell (&scm_i_master_freelist, freelist); |
c8a1bdc4 | 75 | else |
16ea9620 | 76 | { |
9bc4701c MD |
77 | z = *freelist; |
78 | *freelist = SCM_FREE_CELL_CDR (*freelist); | |
16ea9620 | 79 | } |
c8a1bdc4 HWN |
80 | |
81 | /* | |
82 | We update scm_cells_allocated from this function. If we don't | |
83 | update this explicitly, we will have to walk a freelist somewhere | |
84 | later on, which seems a lot more expensive. | |
85 | */ | |
86 | scm_cells_allocated += 1; | |
87 | ||
88 | #if (SCM_DEBUG_CELL_ACCESSES == 1) | |
89 | if (scm_debug_cell_accesses_p) | |
1e71eafb HWN |
90 | { |
91 | if (SCM_GC_MARK_P (z)) | |
92 | { | |
93 | fprintf(stderr, "scm_cell tried to allocate a marked cell.\n"); | |
94 | abort(); | |
95 | } | |
6b69393d | 96 | else if (SCM_GC_CELL_WORD(z, 0) != scm_tc_free_cell) |
1e71eafb HWN |
97 | { |
98 | fprintf(stderr, "cell from freelist is not a free cell.\n"); | |
99 | abort(); | |
100 | } | |
101 | } | |
102 | ||
103 | /* | |
104 | Always set mark. Otherwise cells that are alloced before | |
105 | scm_debug_cell_accesses_p is toggled seem invalid. | |
106 | */ | |
107 | SCM_SET_GC_MARK (z); | |
108 | ||
109 | /* | |
110 | TODO: figure out if this use of mark bits is valid with | |
111 | threading. What if another thread is doing GC at this point | |
112 | ... ? | |
113 | */ | |
c8a1bdc4 | 114 | |
c8a1bdc4 | 115 | #endif |
16ea9620 | 116 | |
c8a1bdc4 | 117 | |
16ea9620 MV |
118 | /* Initialize the type slot last so that the cell is ignored by the |
119 | GC until it is completely initialized. This is only relevant | |
b2a339f6 MV |
120 | when the GC can actually run during this code, which it can't |
121 | since the GC only runs when all other threads are stopped. | |
16ea9620 | 122 | */ |
1fc8902f DH |
123 | SCM_GC_SET_CELL_WORD (z, 1, cdr); |
124 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
16ea9620 | 125 | |
eab1b259 HWN |
126 | #if (SCM_DEBUG_CELL_ACCESSES == 1) |
127 | if (scm_expensive_debug_cell_accesses_p ) | |
128 | scm_i_expensive_validation_check (z); | |
129 | #endif | |
c8a1bdc4 | 130 | |
16ea9620 MV |
131 | return z; |
132 | } | |
133 | ||
60e7529a RB |
134 | #if defined SCM_C_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
135 | /* definitely inlining */ | |
2b2c6fca MV |
136 | #ifdef __GNUC__ |
137 | extern | |
138 | #else | |
139 | static | |
140 | #endif | |
141 | SCM_C_INLINE | |
60e7529a | 142 | #endif |
c8a1bdc4 | 143 | SCM |
228a24ef DH |
144 | scm_double_cell (scm_t_bits car, scm_t_bits cbr, |
145 | scm_t_bits ccr, scm_t_bits cdr) | |
16ea9620 | 146 | { |
5e1e20c8 MV |
147 | SCM z; |
148 | SCM *freelist = SCM_FREELIST_LOC (scm_i_freelist2); | |
149 | ||
d2e53ed6 | 150 | if (scm_is_null (*freelist)) |
9bc4701c | 151 | z = scm_gc_for_newcell (&scm_i_master_freelist2, freelist); |
16ea9620 MV |
152 | else |
153 | { | |
9bc4701c MD |
154 | z = *freelist; |
155 | *freelist = SCM_FREE_CELL_CDR (*freelist); | |
16ea9620 MV |
156 | } |
157 | ||
c8a1bdc4 HWN |
158 | scm_cells_allocated += 2; |
159 | ||
16ea9620 MV |
160 | /* Initialize the type slot last so that the cell is ignored by the |
161 | GC until it is completely initialized. This is only relevant | |
b2a339f6 MV |
162 | when the GC can actually run during this code, which it can't |
163 | since the GC only runs when all other threads are stopped. | |
16ea9620 | 164 | */ |
1fc8902f DH |
165 | SCM_GC_SET_CELL_WORD (z, 1, cbr); |
166 | SCM_GC_SET_CELL_WORD (z, 2, ccr); | |
167 | SCM_GC_SET_CELL_WORD (z, 3, cdr); | |
168 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
16ea9620 | 169 | |
c8a1bdc4 HWN |
170 | #if (SCM_DEBUG_CELL_ACCESSES == 1) |
171 | if (scm_debug_cell_accesses_p) | |
172 | { | |
173 | if (SCM_GC_MARK_P (z)) | |
174 | { | |
175 | fprintf(stderr, | |
176 | "scm_double_cell tried to allocate a marked cell.\n"); | |
177 | abort(); | |
178 | } | |
c8a1bdc4 | 179 | } |
4ad0814a HWN |
180 | |
181 | /* see above. */ | |
182 | SCM_SET_GC_MARK (z); | |
183 | ||
3553e1d1 GH |
184 | #endif |
185 | ||
186 | /* When this function is inlined, it's possible that the last | |
187 | SCM_GC_SET_CELL_WORD above will be adjacent to a following | |
188 | initialization of z. E.g., it occurred in scm_make_real. GCC | |
189 | from around version 3 (e.g., certainly 3.2) began taking | |
190 | advantage of strict C aliasing rules which say that it's OK to | |
191 | interchange the initialization above and the one below when the | |
192 | pointer types appear to differ sufficiently. We don't want that, | |
193 | of course. GCC allows this behaviour to be disabled with the | |
194 | -fno-strict-aliasing option, but would also need to be supplied | |
195 | by Guile users. Instead, the following statements prevent the | |
196 | reordering. | |
197 | */ | |
198 | #ifdef __GNUC__ | |
cb975c21 | 199 | __asm__ volatile ("" : : : "memory"); |
3553e1d1 GH |
200 | #else |
201 | /* portable version, just in case any other compiler does the same | |
202 | thing. */ | |
203 | scm_remember_upto_here_1 (z); | |
c8a1bdc4 | 204 | #endif |
6253f3f1 | 205 | |
c8a1bdc4 HWN |
206 | return z; |
207 | } | |
6253f3f1 | 208 | |
9598a406 MV |
209 | #if defined SCM_C_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
210 | /* definitely inlining */ | |
211 | #ifdef __GNUC__ | |
212 | extern | |
213 | #else | |
214 | static | |
215 | #endif | |
216 | SCM_C_INLINE | |
217 | #endif | |
218 | SCM | |
219 | scm_array_handle_ref (scm_t_array_handle *h, ssize_t p) | |
220 | { | |
221 | return h->ref (h, p); | |
222 | } | |
eab1b259 | 223 | |
9598a406 MV |
224 | #if defined SCM_C_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
225 | /* definitely inlining */ | |
226 | #ifdef __GNUC__ | |
227 | extern | |
228 | #else | |
229 | static | |
230 | #endif | |
231 | SCM_C_INLINE | |
232 | #endif | |
233 | void | |
234 | scm_array_handle_set (scm_t_array_handle *h, ssize_t p, SCM v) | |
235 | { | |
236 | h->set (h, p, v); | |
237 | } | |
eab1b259 | 238 | |
d5ad4aa6 MV |
239 | #if defined SCM_C_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
240 | /* definitely inlining */ | |
241 | #ifdef __GNUC__ | |
242 | extern | |
243 | #else | |
244 | static | |
245 | #endif | |
246 | SCM_C_INLINE | |
247 | #endif | |
248 | int | |
249 | scm_is_pair (SCM x) | |
250 | { | |
251 | return SCM_I_CONSP (x); | |
252 | } | |
253 | ||
16ea9620 | 254 | #endif |
16ea9620 | 255 | #endif |