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16ea9620 MV |
1 | /* classes: h_files */ |
2 | ||
3 | #ifndef SCM_INLINE_H | |
4 | #define SCM_INLINE_H | |
5 | ||
6 | /* Copyright (C) 2001 Free Software Foundation, Inc. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2, or (at your option) | |
11 | * any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this software; see the file COPYING. If not, write to | |
20 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, | |
21 | * Boston, MA 02111-1307 USA | |
22 | * | |
23 | * As a special exception, the Free Software Foundation gives permission | |
24 | * for additional uses of the text contained in its release of GUILE. | |
25 | * | |
26 | * The exception is that, if you link the GUILE library with other files | |
27 | * to produce an executable, this does not by itself cause the | |
28 | * resulting executable to be covered by the GNU General Public License. | |
29 | * Your use of that executable is in no way restricted on account of | |
30 | * linking the GUILE library code into it. | |
31 | * | |
32 | * This exception does not however invalidate any other reasons why | |
33 | * the executable file might be covered by the GNU General Public License. | |
34 | * | |
35 | * This exception applies only to the code released by the | |
36 | * Free Software Foundation under the name GUILE. If you copy | |
37 | * code from other Free Software Foundation releases into a copy of | |
38 | * GUILE, as the General Public License permits, the exception does | |
39 | * not apply to the code that you add in this way. To avoid misleading | |
40 | * anyone as to the status of such modified files, you must delete | |
41 | * this exception notice from them. | |
42 | * | |
43 | * If you write modifications of your own for GUILE, it is your choice | |
44 | * whether to permit this exception to apply to your modifications. | |
45 | * If you do not wish that, delete this exception notice. */ | |
46 | ||
47 | /* This file is for inline functions. On platforms that don't support | |
48 | inlining functions, they are turned into ordinary functions. See | |
49 | "inline.c". | |
50 | */ | |
51 | ||
c8a1bdc4 HWN |
52 | |
53 | #if (SCM_DEBUG_CELL_ACCESSES == 1) | |
54 | #include <stdio.h> | |
55 | #endif | |
56 | ||
16ea9620 MV |
57 | #include "libguile/pairs.h" |
58 | #include "libguile/gc.h" | |
59 | ||
c8a1bdc4 HWN |
60 | |
61 | SCM_API SCM scm_cell (scm_t_bits car, scm_t_bits cdr); | |
62 | SCM_API SCM scm_double_cell (scm_t_bits car, scm_t_bits cbr, | |
63 | scm_t_bits ccr, scm_t_bits cdr); | |
64 | ||
16ea9620 MV |
65 | #ifdef HAVE_INLINE |
66 | ||
c8a1bdc4 HWN |
67 | |
68 | ||
69 | #ifndef EXTERN_INLINE | |
70 | #define EXTERN_INLINE extern inline | |
71 | #endif | |
72 | ||
73 | extern unsigned scm_newcell2_count; | |
74 | extern unsigned scm_newcell_count; | |
75 | ||
76 | ||
77 | EXTERN_INLINE | |
78 | SCM | |
228a24ef | 79 | scm_cell (scm_t_bits car, scm_t_bits cdr) |
16ea9620 MV |
80 | { |
81 | SCM z; | |
82 | ||
c8a1bdc4 | 83 | if (SCM_NULLP (scm_i_freelist)) |
16ea9620 | 84 | { |
c8a1bdc4 | 85 | z = scm_gc_for_newcell (&scm_i_master_freelist, &scm_i_freelist); |
16ea9620 | 86 | } |
c8a1bdc4 | 87 | else |
16ea9620 | 88 | { |
c8a1bdc4 HWN |
89 | z = scm_i_freelist; |
90 | scm_i_freelist = SCM_FREE_CELL_CDR (scm_i_freelist); | |
16ea9620 | 91 | } |
c8a1bdc4 HWN |
92 | |
93 | /* | |
94 | We update scm_cells_allocated from this function. If we don't | |
95 | update this explicitly, we will have to walk a freelist somewhere | |
96 | later on, which seems a lot more expensive. | |
97 | */ | |
98 | scm_cells_allocated += 1; | |
99 | ||
100 | #if (SCM_DEBUG_CELL_ACCESSES == 1) | |
101 | if (scm_debug_cell_accesses_p) | |
16ea9620 | 102 | { |
c8a1bdc4 HWN |
103 | if (SCM_GC_MARK_P (z)) |
104 | { | |
105 | fprintf(stderr, "scm_cell tried to allocate a marked cell.\n"); | |
106 | abort(); | |
107 | } | |
108 | else if (SCM_GC_CELL_TYPE(z) != scm_tc_free_cell) | |
109 | { | |
110 | fprintf(stderr, "cell from freelist is not a free cell.\n"); | |
111 | abort(); | |
112 | } | |
113 | ||
114 | SCM_SET_GC_MARK (z); | |
16ea9620 | 115 | } |
c8a1bdc4 | 116 | #endif |
16ea9620 | 117 | |
c8a1bdc4 | 118 | |
16ea9620 MV |
119 | /* Initialize the type slot last so that the cell is ignored by the |
120 | GC until it is completely initialized. This is only relevant | |
121 | when the GC can actually run during this code, which it can't for | |
122 | cooperating threads, but it might be important when we get true | |
123 | preemptive threads. | |
124 | */ | |
1fc8902f DH |
125 | SCM_GC_SET_CELL_WORD (z, 1, cdr); |
126 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
16ea9620 MV |
127 | |
128 | #ifdef USE_THREADS | |
129 | #ifndef USE_COOP_THREADS | |
130 | /* When we are using non-cooperating threads, we might need to make | |
131 | sure that the initial values for the slots are protected until | |
132 | the cell is completely initialized. | |
133 | */ | |
134 | #error review me | |
135 | scm_remember_upto_here_1 (SCM_PACK (cdr)); | |
136 | #endif | |
137 | #endif | |
138 | ||
c8a1bdc4 HWN |
139 | |
140 | ||
16ea9620 MV |
141 | return z; |
142 | } | |
143 | ||
c8a1bdc4 HWN |
144 | EXTERN_INLINE |
145 | SCM | |
228a24ef DH |
146 | scm_double_cell (scm_t_bits car, scm_t_bits cbr, |
147 | scm_t_bits ccr, scm_t_bits cdr) | |
16ea9620 MV |
148 | { |
149 | SCM z; | |
150 | ||
16ea9620 | 151 | |
c8a1bdc4 | 152 | if (SCM_NULLP (scm_i_freelist2)) |
16ea9620 | 153 | { |
c8a1bdc4 | 154 | z = scm_gc_for_newcell (&scm_i_master_freelist2, &scm_i_freelist2); |
16ea9620 MV |
155 | } |
156 | else | |
157 | { | |
c8a1bdc4 HWN |
158 | z = scm_i_freelist2; |
159 | scm_i_freelist2 = SCM_FREE_CELL_CDR (scm_i_freelist2); | |
16ea9620 MV |
160 | } |
161 | ||
c8a1bdc4 HWN |
162 | scm_cells_allocated += 2; |
163 | ||
16ea9620 MV |
164 | /* Initialize the type slot last so that the cell is ignored by the |
165 | GC until it is completely initialized. This is only relevant | |
166 | when the GC can actually run during this code, which it can't for | |
167 | cooperating threads, but it might be important when we get true | |
168 | preemptive threads. | |
169 | */ | |
1fc8902f DH |
170 | SCM_GC_SET_CELL_WORD (z, 1, cbr); |
171 | SCM_GC_SET_CELL_WORD (z, 2, ccr); | |
172 | SCM_GC_SET_CELL_WORD (z, 3, cdr); | |
173 | SCM_GC_SET_CELL_WORD (z, 0, car); | |
16ea9620 MV |
174 | |
175 | #ifdef USE_THREADS | |
176 | #ifndef USE_COOP_THREADS | |
177 | /* When we are using non-cooperating threads, we might need to make | |
178 | sure that the initial values for the slots are protected until | |
179 | the cell is completely initialized. | |
180 | */ | |
181 | #error review me | |
182 | scm_remember_upto_here_3 (SCM_PACK (cbr), SCM_PACK (ccr), SCM_PACK (cdr)); | |
183 | #endif | |
184 | #endif | |
185 | ||
16ea9620 | 186 | |
c8a1bdc4 HWN |
187 | #if (SCM_DEBUG_CELL_ACCESSES == 1) |
188 | if (scm_debug_cell_accesses_p) | |
189 | { | |
190 | if (SCM_GC_MARK_P (z)) | |
191 | { | |
192 | fprintf(stderr, | |
193 | "scm_double_cell tried to allocate a marked cell.\n"); | |
194 | abort(); | |
195 | } | |
196 | ||
197 | SCM_SET_GC_MARK (z); | |
198 | } | |
199 | #endif | |
6253f3f1 | 200 | |
c8a1bdc4 HWN |
201 | return z; |
202 | } | |
6253f3f1 | 203 | |
16ea9620 | 204 | #endif |
16ea9620 | 205 | #endif |