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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 | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
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" |
16ea9620 | 38 | |
c8a1bdc4 HWN |
39 | |
40 | SCM_API SCM scm_cell (scm_t_bits car, scm_t_bits cdr); | |
41 | SCM_API SCM scm_double_cell (scm_t_bits car, scm_t_bits cbr, | |
42 | scm_t_bits ccr, scm_t_bits cdr); | |
43 | ||
9598a406 MV |
44 | SCM_API SCM scm_array_handle_ref (scm_t_array_handle *h, ssize_t pos); |
45 | SCM_API void scm_array_handle_set (scm_t_array_handle *h, ssize_t pos, SCM val); | |
16ea9620 | 46 | |
60e7529a RB |
47 | |
48 | #if defined SCM_C_INLINE || defined SCM_INLINE_C_INCLUDING_INLINE_H | |
49 | /* either inlining, or being included from inline.c. We use (and | |
50 | repeat) this long #if test here and below so that we don't have to | |
51 | introduce any extraneous symbols into the public namespace. We | |
52 | only need SCM_C_INLINE to be seen publically . */ | |
c8a1bdc4 HWN |
53 | |
54 | extern unsigned scm_newcell2_count; | |
55 | extern unsigned scm_newcell_count; | |
56 | ||
60e7529a RB |
57 | #if defined SCM_C_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
58 | /* definitely inlining */ | |
2b2c6fca MV |
59 | #ifdef __GNUC__ |
60 | extern | |
61 | #else | |
62 | static | |
63 | #endif | |
64 | SCM_C_INLINE | |
60e7529a | 65 | #endif |
c8a1bdc4 | 66 | SCM |
228a24ef | 67 | scm_cell (scm_t_bits car, scm_t_bits cdr) |
16ea9620 MV |
68 | { |
69 | SCM z; | |
9bc4701c | 70 | SCM *freelist = SCM_FREELIST_LOC (scm_i_freelist); |
16ea9620 | 71 | |
d2e53ed6 | 72 | if (scm_is_null (*freelist)) |
9bc4701c | 73 | z = scm_gc_for_newcell (&scm_i_master_freelist, freelist); |
c8a1bdc4 | 74 | else |
16ea9620 | 75 | { |
9bc4701c MD |
76 | z = *freelist; |
77 | *freelist = SCM_FREE_CELL_CDR (*freelist); | |
16ea9620 | 78 | } |
c8a1bdc4 HWN |
79 | |
80 | /* | |
81 | We update scm_cells_allocated from this function. If we don't | |
82 | update this explicitly, we will have to walk a freelist somewhere | |
83 | later on, which seems a lot more expensive. | |
84 | */ | |
85 | scm_cells_allocated += 1; | |
86 | ||
87 | #if (SCM_DEBUG_CELL_ACCESSES == 1) | |
88 | if (scm_debug_cell_accesses_p) | |
1e71eafb HWN |
89 | { |
90 | if (SCM_GC_MARK_P (z)) | |
91 | { | |
92 | fprintf(stderr, "scm_cell tried to allocate a marked cell.\n"); | |
93 | abort(); | |
94 | } | |
6b69393d | 95 | else if (SCM_GC_CELL_WORD(z, 0) != scm_tc_free_cell) |
1e71eafb HWN |
96 | { |
97 | fprintf(stderr, "cell from freelist is not a free cell.\n"); | |
98 | abort(); | |
99 | } | |
100 | } | |
101 | ||
102 | /* | |
103 | Always set mark. Otherwise cells that are alloced before | |
104 | scm_debug_cell_accesses_p is toggled seem invalid. | |
105 | */ | |
106 | SCM_SET_GC_MARK (z); | |
107 | ||
108 | /* | |
109 | TODO: figure out if this use of mark bits is valid with | |
110 | threading. What if another thread is doing GC at this point | |
111 | ... ? | |
112 | */ | |
c8a1bdc4 | 113 | |
c8a1bdc4 | 114 | #endif |
16ea9620 | 115 | |
c8a1bdc4 | 116 | |
16ea9620 MV |
117 | /* Initialize the type slot last so that the cell is ignored by the |
118 | GC until it is completely initialized. This is only relevant | |
b2a339f6 MV |
119 | when the GC can actually run during this code, which it can't |
120 | since the GC only runs when all other threads are stopped. | |
16ea9620 | 121 | */ |
1fc8902f DH |
122 | SCM_GC_SET_CELL_WORD (z, 1, cdr); |
123 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
16ea9620 | 124 | |
eab1b259 HWN |
125 | #if (SCM_DEBUG_CELL_ACCESSES == 1) |
126 | if (scm_expensive_debug_cell_accesses_p ) | |
127 | scm_i_expensive_validation_check (z); | |
128 | #endif | |
c8a1bdc4 | 129 | |
16ea9620 MV |
130 | return z; |
131 | } | |
132 | ||
60e7529a RB |
133 | #if defined SCM_C_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
134 | /* definitely inlining */ | |
2b2c6fca MV |
135 | #ifdef __GNUC__ |
136 | extern | |
137 | #else | |
138 | static | |
139 | #endif | |
140 | SCM_C_INLINE | |
60e7529a | 141 | #endif |
c8a1bdc4 | 142 | SCM |
228a24ef DH |
143 | scm_double_cell (scm_t_bits car, scm_t_bits cbr, |
144 | scm_t_bits ccr, scm_t_bits cdr) | |
16ea9620 | 145 | { |
5e1e20c8 MV |
146 | SCM z; |
147 | SCM *freelist = SCM_FREELIST_LOC (scm_i_freelist2); | |
148 | ||
d2e53ed6 | 149 | if (scm_is_null (*freelist)) |
9bc4701c | 150 | z = scm_gc_for_newcell (&scm_i_master_freelist2, freelist); |
16ea9620 MV |
151 | else |
152 | { | |
9bc4701c MD |
153 | z = *freelist; |
154 | *freelist = SCM_FREE_CELL_CDR (*freelist); | |
16ea9620 MV |
155 | } |
156 | ||
c8a1bdc4 HWN |
157 | scm_cells_allocated += 2; |
158 | ||
16ea9620 MV |
159 | /* Initialize the type slot last so that the cell is ignored by the |
160 | GC until it is completely initialized. This is only relevant | |
b2a339f6 MV |
161 | when the GC can actually run during this code, which it can't |
162 | since the GC only runs when all other threads are stopped. | |
16ea9620 | 163 | */ |
1fc8902f DH |
164 | SCM_GC_SET_CELL_WORD (z, 1, cbr); |
165 | SCM_GC_SET_CELL_WORD (z, 2, ccr); | |
166 | SCM_GC_SET_CELL_WORD (z, 3, cdr); | |
167 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
16ea9620 | 168 | |
c8a1bdc4 HWN |
169 | #if (SCM_DEBUG_CELL_ACCESSES == 1) |
170 | if (scm_debug_cell_accesses_p) | |
171 | { | |
172 | if (SCM_GC_MARK_P (z)) | |
173 | { | |
174 | fprintf(stderr, | |
175 | "scm_double_cell tried to allocate a marked cell.\n"); | |
176 | abort(); | |
177 | } | |
c8a1bdc4 | 178 | } |
4ad0814a HWN |
179 | |
180 | /* see above. */ | |
181 | SCM_SET_GC_MARK (z); | |
182 | ||
3553e1d1 GH |
183 | #endif |
184 | ||
185 | /* When this function is inlined, it's possible that the last | |
186 | SCM_GC_SET_CELL_WORD above will be adjacent to a following | |
187 | initialization of z. E.g., it occurred in scm_make_real. GCC | |
188 | from around version 3 (e.g., certainly 3.2) began taking | |
189 | advantage of strict C aliasing rules which say that it's OK to | |
190 | interchange the initialization above and the one below when the | |
191 | pointer types appear to differ sufficiently. We don't want that, | |
192 | of course. GCC allows this behaviour to be disabled with the | |
193 | -fno-strict-aliasing option, but would also need to be supplied | |
194 | by Guile users. Instead, the following statements prevent the | |
195 | reordering. | |
196 | */ | |
197 | #ifdef __GNUC__ | |
cb975c21 | 198 | __asm__ volatile ("" : : : "memory"); |
3553e1d1 GH |
199 | #else |
200 | /* portable version, just in case any other compiler does the same | |
201 | thing. */ | |
202 | scm_remember_upto_here_1 (z); | |
c8a1bdc4 | 203 | #endif |
6253f3f1 | 204 | |
c8a1bdc4 HWN |
205 | return z; |
206 | } | |
6253f3f1 | 207 | |
9598a406 MV |
208 | #if defined SCM_C_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
209 | /* definitely inlining */ | |
210 | #ifdef __GNUC__ | |
211 | extern | |
212 | #else | |
213 | static | |
214 | #endif | |
215 | SCM_C_INLINE | |
216 | #endif | |
217 | SCM | |
218 | scm_array_handle_ref (scm_t_array_handle *h, ssize_t p) | |
219 | { | |
220 | return h->ref (h, p); | |
221 | } | |
eab1b259 | 222 | |
9598a406 MV |
223 | #if defined SCM_C_INLINE && ! defined SCM_INLINE_C_INCLUDING_INLINE_H |
224 | /* definitely inlining */ | |
225 | #ifdef __GNUC__ | |
226 | extern | |
227 | #else | |
228 | static | |
229 | #endif | |
230 | SCM_C_INLINE | |
231 | #endif | |
232 | void | |
233 | scm_array_handle_set (scm_t_array_handle *h, ssize_t p, SCM v) | |
234 | { | |
235 | h->set (h, p, v); | |
236 | } | |
eab1b259 | 237 | |
16ea9620 | 238 | #endif |
16ea9620 | 239 | #endif |