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fd12a19a | 1 | /* Copyright (C) 1995,1996,1998,2000,2001,2003,2004, 2006, 2008, 2009, 2010 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
0f2d19dd | 20 | \f |
dbb605f5 LC |
21 | #ifdef HAVE_CONFIG_H |
22 | # include <config.h> | |
23 | #endif | |
0f2d19dd | 24 | |
a0599745 MD |
25 | #include "libguile/_scm.h" |
26 | ||
27 | #include "libguile/alist.h" | |
28 | #include "libguile/eval.h" | |
29 | #include "libguile/procs.h" | |
30 | #include "libguile/gsubr.h" | |
5540e847 | 31 | #include "libguile/smob.h" |
a0599745 MD |
32 | #include "libguile/root.h" |
33 | #include "libguile/vectors.h" | |
82c76fd3 | 34 | #include "libguile/hashtab.h" |
2fb924f6 | 35 | #include "libguile/programs.h" |
a0599745 MD |
36 | |
37 | #include "libguile/validate.h" | |
38 | #include "libguile/procprop.h" | |
0f2d19dd JB |
39 | \f |
40 | ||
c083a529 | 41 | SCM_GLOBAL_SYMBOL (scm_sym_system_procedure, "system-procedure"); |
67e60655 | 42 | SCM_GLOBAL_SYMBOL (scm_sym_arity, "arity"); |
fd12a19a | 43 | SCM_GLOBAL_SYMBOL (scm_sym_name, "name"); |
67e60655 | 44 | |
e1bdf9e2 AW |
45 | static SCM overrides; |
46 | static scm_i_pthread_mutex_t overrides_lock = SCM_I_PTHREAD_MUTEX_INITIALIZER; | |
56164a5a | 47 | |
314b8716 AW |
48 | int |
49 | scm_i_procedure_arity (SCM proc, int *req, int *opt, int *rest) | |
67e60655 | 50 | { |
75c3ed28 | 51 | while (!SCM_PROGRAM_P (proc)) |
67e60655 | 52 | { |
75c3ed28 | 53 | if (SCM_IMP (proc)) |
314b8716 | 54 | return 0; |
75c3ed28 AW |
55 | switch (SCM_TYP7 (proc)) |
56 | { | |
57 | case scm_tc7_smob: | |
58 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
59 | return 0; | |
60 | proc = scm_i_smob_apply_trampoline (proc); | |
61 | break; | |
62 | case scm_tcs_struct: | |
63 | if (!SCM_STRUCT_APPLICABLE_P (proc)) | |
64 | return 0; | |
65 | proc = SCM_STRUCT_PROCEDURE (proc); | |
66 | break; | |
67 | default: | |
68 | return 0; | |
69 | } | |
67e60655 | 70 | } |
75c3ed28 | 71 | return scm_i_program_arity (proc, req, opt, rest); |
67e60655 MD |
72 | } |
73 | ||
3b3b36dd | 74 | SCM_DEFINE (scm_procedure_properties, "procedure-properties", 1, 0, 0, |
1bbd0b84 | 75 | (SCM proc), |
b380b885 | 76 | "Return @var{obj}'s property list.") |
1bbd0b84 | 77 | #define FUNC_NAME s_scm_procedure_properties |
0f2d19dd | 78 | { |
314b8716 AW |
79 | SCM ret; |
80 | int req, opt, rest; | |
56164a5a | 81 | |
34d19ef6 | 82 | SCM_VALIDATE_PROC (1, proc); |
314b8716 | 83 | |
e1bdf9e2 AW |
84 | scm_i_pthread_mutex_lock (&overrides_lock); |
85 | ret = scm_hashq_ref (overrides, proc, SCM_BOOL_F); | |
86 | scm_i_pthread_mutex_unlock (&overrides_lock); | |
314b8716 | 87 | |
e1bdf9e2 AW |
88 | if (scm_is_false (ret)) |
89 | { | |
90 | if (SCM_PROGRAM_P (proc)) | |
91 | ret = scm_program_properties (proc); | |
92 | else | |
93 | ret = SCM_EOL; | |
94 | } | |
95 | ||
314b8716 AW |
96 | scm_i_procedure_arity (proc, &req, &opt, &rest); |
97 | ||
98 | return scm_acons (scm_sym_arity, | |
99 | scm_list_3 (scm_from_int (req), | |
100 | scm_from_int (opt), | |
101 | scm_from_bool (rest)), | |
102 | ret); | |
0f2d19dd | 103 | } |
1bbd0b84 | 104 | #undef FUNC_NAME |
0f2d19dd | 105 | |
3b3b36dd | 106 | SCM_DEFINE (scm_set_procedure_properties_x, "set-procedure-properties!", 2, 0, 0, |
56164a5a AW |
107 | (SCM proc, SCM alist), |
108 | "Set @var{proc}'s property list to @var{alist}.") | |
1bbd0b84 | 109 | #define FUNC_NAME s_scm_set_procedure_properties_x |
0f2d19dd | 110 | { |
56164a5a AW |
111 | SCM_VALIDATE_PROC (1, proc); |
112 | ||
e1bdf9e2 AW |
113 | if (scm_assq (alist, scm_sym_arity)) |
114 | SCM_MISC_ERROR ("arity is a read-only property", SCM_EOL); | |
115 | ||
116 | scm_i_pthread_mutex_lock (&overrides_lock); | |
117 | scm_hashq_set_x (overrides, proc, alist); | |
118 | scm_i_pthread_mutex_unlock (&overrides_lock); | |
314b8716 | 119 | |
0f2d19dd JB |
120 | return SCM_UNSPECIFIED; |
121 | } | |
1bbd0b84 | 122 | #undef FUNC_NAME |
0f2d19dd | 123 | |
3b3b36dd | 124 | SCM_DEFINE (scm_procedure_property, "procedure-property", 2, 0, 0, |
56164a5a AW |
125 | (SCM proc, SCM key), |
126 | "Return the property of @var{proc} with name @var{key}.") | |
1bbd0b84 | 127 | #define FUNC_NAME s_scm_procedure_property |
0f2d19dd | 128 | { |
56164a5a AW |
129 | SCM_VALIDATE_PROC (1, proc); |
130 | ||
131 | if (scm_is_eq (key, scm_sym_arity)) | |
132 | /* avoid a cons in this case */ | |
314b8716 AW |
133 | { |
134 | int req, opt, rest; | |
135 | scm_i_procedure_arity (proc, &req, &opt, &rest); | |
136 | return scm_list_3 (scm_from_int (req), | |
137 | scm_from_int (opt), | |
138 | scm_from_bool (rest)); | |
139 | } | |
56164a5a | 140 | else |
90fa152c | 141 | return scm_assq_ref (scm_procedure_properties (proc), key); |
0f2d19dd | 142 | } |
1bbd0b84 | 143 | #undef FUNC_NAME |
0f2d19dd | 144 | |
3b3b36dd | 145 | SCM_DEFINE (scm_set_procedure_property_x, "set-procedure-property!", 3, 0, 0, |
56164a5a AW |
146 | (SCM proc, SCM key, SCM val), |
147 | "In @var{proc}'s property list, set the property named @var{key} to\n" | |
148 | "@var{val}.") | |
1bbd0b84 | 149 | #define FUNC_NAME s_scm_set_procedure_property_x |
0f2d19dd | 150 | { |
90fa152c | 151 | SCM props; |
56164a5a | 152 | |
e1bdf9e2 | 153 | SCM_VALIDATE_PROC (1, proc); |
56164a5a | 154 | if (scm_is_eq (key, scm_sym_arity)) |
1bbd0b84 | 155 | SCM_MISC_ERROR ("arity is a read-only property", SCM_EOL); |
c783b082 | 156 | |
90fa152c | 157 | props = scm_procedure_properties (proc); |
e1bdf9e2 | 158 | scm_i_pthread_mutex_lock (&overrides_lock); |
90fa152c | 159 | scm_hashq_set_x (overrides, proc, scm_assq_set_x (props, key, val)); |
e1bdf9e2 | 160 | scm_i_pthread_mutex_unlock (&overrides_lock); |
c783b082 | 161 | |
0f2d19dd JB |
162 | return SCM_UNSPECIFIED; |
163 | } | |
1bbd0b84 | 164 | #undef FUNC_NAME |
0f2d19dd JB |
165 | |
166 | \f | |
167 | ||
1cc91f1b | 168 | |
0f2d19dd JB |
169 | void |
170 | scm_init_procprop () | |
0f2d19dd | 171 | { |
e1bdf9e2 | 172 | overrides = scm_make_weak_key_hash_table (SCM_UNDEFINED); |
a0599745 | 173 | #include "libguile/procprop.x" |
0f2d19dd JB |
174 | } |
175 | ||
89e00824 ML |
176 | |
177 | /* | |
178 | Local Variables: | |
179 | c-file-style: "gnu" | |
180 | End: | |
181 | */ |