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0f2d19dd JB |
1 | /* classes: h_files */ |
2 | ||
3 | #ifndef STRUCTH | |
4 | #define STRUCTH | |
a54367e2 | 5 | /* Copyright (C) 1995, 1997, 1999, 2000 Free Software Foundation, Inc. |
0f2d19dd JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2, or (at your option) | |
10 | * any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
19 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
20 | * Boston, MA 02111-1307 USA | |
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21 | * |
22 | * As a special exception, the Free Software Foundation gives permission | |
23 | * for additional uses of the text contained in its release of GUILE. | |
24 | * | |
25 | * The exception is that, if you link the GUILE library with other files | |
26 | * to produce an executable, this does not by itself cause the | |
27 | * resulting executable to be covered by the GNU General Public License. | |
28 | * Your use of that executable is in no way restricted on account of | |
29 | * linking the GUILE library code into it. | |
30 | * | |
31 | * This exception does not however invalidate any other reasons why | |
32 | * the executable file might be covered by the GNU General Public License. | |
33 | * | |
34 | * This exception applies only to the code released by the | |
35 | * Free Software Foundation under the name GUILE. If you copy | |
36 | * code from other Free Software Foundation releases into a copy of | |
37 | * GUILE, as the General Public License permits, the exception does | |
38 | * not apply to the code that you add in this way. To avoid misleading | |
39 | * anyone as to the status of such modified files, you must delete | |
40 | * this exception notice from them. | |
41 | * | |
42 | * If you write modifications of your own for GUILE, it is your choice | |
43 | * whether to permit this exception to apply to your modifications. | |
82892bed | 44 | * If you do not wish that, delete this exception notice. */ |
d3a6bc94 GB |
45 | |
46 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
47 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
0f2d19dd JB |
48 | \f |
49 | ||
b4309c3c | 50 | #include "libguile/__scm.h" |
bafcafb2 | 51 | #include "libguile/print.h" |
0f2d19dd JB |
52 | |
53 | \f | |
54 | ||
2c36c351 | 55 | /* Number of words with negative index */ |
ad196599 | 56 | #define scm_struct_n_extra_words 4 |
2c53acd5 | 57 | #define scm_struct_entity_n_extra_words 6 |
2c36c351 | 58 | |
0f2d19dd | 59 | /* These are how the initial words of a vtable are allocated. */ |
2c53acd5 MD |
60 | #define scm_struct_i_setter -6 /* Setter */ |
61 | #define scm_struct_i_procedure -5 /* Optional procedure slot */ | |
ad196599 MD |
62 | #define scm_struct_i_free -4 /* Destructor */ |
63 | #define scm_struct_i_ptr -3 /* Start of block (see alloc_struct) */ | |
4bfdf158 | 64 | #define scm_struct_i_n_words -2 /* How many words allocated to this struct? */ |
ad196599 MD |
65 | #define scm_struct_i_size -1 /* Instance size */ |
66 | #define scm_struct_i_flags -1 /* Upper 12 bits used as flags */ | |
4bfdf158 MD |
67 | #define scm_vtable_index_layout 0 /* A symbol describing the physical arrangement of this type. */ |
68 | #define scm_vtable_index_vcell 1 /* An opaque word, managed by the garbage collector. */ | |
69 | #define scm_vtable_index_vtable 2 /* A pointer to the handle for this vtable. */ | |
70 | #define scm_vtable_index_printer 3 /* A printer for this struct type. */ | |
71 | #define scm_vtable_offset_user 4 /* Where do user fields start? */ | |
0f2d19dd | 72 | |
1be6b49c | 73 | typedef size_t (*scm_struct_free_t) (scm_bits_t * vtable, scm_bits_t * data); |
ad196599 MD |
74 | |
75 | #define SCM_STRUCTF_MASK (0xFFF << 20) | |
f40f662e | 76 | #define SCM_STRUCTF_ENTITY (1L << 30) /* Indicates presence of proc slots */ |
7ee70a26 MD |
77 | #define SCM_STRUCTF_LIGHT (1L << 31) /* Light representation |
78 | (no hidden words) */ | |
0f2d19dd | 79 | |
c8045e8d | 80 | /* Dirk:FIXME:: the SCM_STRUCTP predicate is also fulfilled for glocs */ |
d3a6bc94 | 81 | #define SCM_STRUCTP(X) (SCM_NIMP(X) && (SCM_TYP3(X) == scm_tc3_cons_gloc)) |
d8c40b9f | 82 | #define SCM_STRUCT_DATA(X) ((scm_bits_t *) SCM_CELL_WORD_1 (X)) |
c8045e8d | 83 | #define SCM_STRUCT_VTABLE_DATA(X) ((scm_bits_t *) (SCM_CELL_WORD_0 (X) - scm_tc3_cons_gloc)) |
1c3e63f0 DH |
84 | |
85 | #define SCM_STRUCT_LAYOUT(X) (SCM_PACK (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_layout])) | |
86 | #define SCM_SET_STRUCT_LAYOUT(X, v) (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_layout] = SCM_UNPACK (v)) | |
87 | ||
88 | #define SCM_STRUCT_VTABLE(X) (SCM_PACK (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_vtable])) | |
89 | #define SCM_STRUCT_PRINTER(X) (SCM_PACK (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_printer])) | |
ce212434 GH |
90 | #define SCM_SET_STRUCT_PRINTER(x, v)\ |
91 | (SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_printer] = (v)) | |
fee7ef83 | 92 | #define SCM_SET_VTABLE_DESTRUCTOR(X, D) (SCM_STRUCT_DATA (X) [scm_struct_i_free] = (scm_bits_t) (D)) |
2c36c351 MD |
93 | /* Efficiency is important in the following macro, since it's used in GC */ |
94 | #define SCM_LAYOUT_TAILP(X) (((X) & 32) == 0) /* R, W or O */ | |
0f2d19dd | 95 | |
6decd505 MD |
96 | #define SCM_STRUCT_TABLE_NAME(X) SCM_CAR (X) |
97 | #define SCM_SET_STRUCT_TABLE_NAME(X, NAME) SCM_SETCAR (X, NAME) | |
98 | #define SCM_STRUCT_TABLE_CLASS(X) SCM_CDR (X) | |
99 | #define SCM_SET_STRUCT_TABLE_CLASS(X, CLASS) SCM_SETCDR (X, CLASS) | |
100 | extern SCM scm_struct_table; | |
0f2d19dd | 101 | |
85c21339 MD |
102 | #define SCM_STRUCT_GC_CHAIN(X) SCM_CELL_OBJECT_3 (X) |
103 | #define SCM_SET_STRUCT_GC_CHAIN(X, Y) SCM_SET_CELL_OBJECT_3 (X, Y) | |
104 | extern SCM scm_structs_to_free; | |
105 | ||
0f2d19dd | 106 | \f |
0f2d19dd | 107 | |
c8045e8d | 108 | extern scm_bits_t * scm_alloc_struct (int n_words, int n_extra, char * who); |
1be6b49c ML |
109 | extern size_t scm_struct_free_0 (scm_bits_t * vtable, scm_bits_t * data); |
110 | extern size_t scm_struct_free_light (scm_bits_t * vtable, scm_bits_t * data); | |
111 | extern size_t scm_struct_free_standard (scm_bits_t * vtable, scm_bits_t * data); | |
112 | extern size_t scm_struct_free_entity (scm_bits_t * vtable, scm_bits_t * data); | |
7866a09b GB |
113 | extern SCM scm_make_struct_layout (SCM fields); |
114 | extern SCM scm_struct_p (SCM x); | |
115 | extern SCM scm_struct_vtable_p (SCM x); | |
116 | extern SCM scm_make_struct (SCM vtable, SCM tail_array_size, SCM init); | |
117 | extern SCM scm_make_vtable_vtable (SCM extra_fields, SCM tail_array_size, SCM init); | |
118 | extern SCM scm_struct_ref (SCM handle, SCM pos); | |
119 | extern SCM scm_struct_set_x (SCM handle, SCM pos, SCM val); | |
120 | extern SCM scm_struct_vtable (SCM handle); | |
121 | extern SCM scm_struct_vtable_tag (SCM handle); | |
1be6b49c | 122 | extern scm_bits_t scm_struct_ihashq (SCM obj, scm_bits_t n); |
7866a09b GB |
123 | extern SCM scm_struct_create_handle (SCM obj); |
124 | extern SCM scm_struct_vtable_name (SCM vtable); | |
125 | extern SCM scm_set_struct_vtable_name_x (SCM vtable, SCM name); | |
126 | extern void scm_print_struct (SCM exp, SCM port, scm_print_state *); | |
85c21339 | 127 | extern void scm_struct_prehistory (void); |
7866a09b | 128 | extern void scm_init_struct (void); |
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129 | |
130 | #endif /* STRUCTH */ | |
89e00824 ML |
131 | |
132 | /* | |
133 | Local Variables: | |
134 | c-file-style: "gnu" | |
135 | End: | |
136 | */ |