| 1 | /* Copyright (C) 2014 Free Software Foundation, Inc. |
| 2 | * |
| 3 | * This library is free software; you can redistribute it and/or |
| 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. |
| 7 | * |
| 8 | * This library is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * Lesser General Public License for more details. |
| 12 | * |
| 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 |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 16 | * 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | |
| 20 | \f |
| 21 | #ifdef HAVE_CONFIG_H |
| 22 | # include <config.h> |
| 23 | #endif |
| 24 | |
| 25 | #include "libguile/_scm.h" |
| 26 | #include "libguile/goops.h" |
| 27 | #include "libguile/foreign-object.h" |
| 28 | |
| 29 | |
| 30 | \f |
| 31 | |
| 32 | static SCM make_fobj_type_var; |
| 33 | |
| 34 | static void |
| 35 | init_make_fobj_type_var (void) |
| 36 | { |
| 37 | make_fobj_type_var = scm_c_private_lookup ("system foreign-object", |
| 38 | "make-foreign-object-type"); |
| 39 | } |
| 40 | |
| 41 | SCM |
| 42 | scm_make_foreign_object_type (SCM name, SCM slot_names, |
| 43 | scm_t_struct_finalize finalizer) |
| 44 | { |
| 45 | SCM type; |
| 46 | |
| 47 | static scm_i_pthread_once_t once = SCM_I_PTHREAD_ONCE_INIT; |
| 48 | scm_i_pthread_once (&once, init_make_fobj_type_var); |
| 49 | |
| 50 | type = scm_call_2 (scm_variable_ref (make_fobj_type_var), name, slot_names); |
| 51 | |
| 52 | if (finalizer) |
| 53 | SCM_SET_VTABLE_INSTANCE_FINALIZER (type, finalizer); |
| 54 | |
| 55 | return type; |
| 56 | } |
| 57 | |
| 58 | void |
| 59 | scm_assert_foreign_object_type (SCM type, SCM val) |
| 60 | { |
| 61 | if (!SCM_IS_A_P (val, type)) |
| 62 | scm_error (scm_arg_type_key, NULL, "Wrong type (expecting ~A): ~S", |
| 63 | scm_list_2 (scm_class_name (type), val), scm_list_1 (val)); |
| 64 | } |
| 65 | |
| 66 | SCM |
| 67 | scm_make_foreign_object_0 (SCM type) |
| 68 | { |
| 69 | return scm_make_foreign_object_n (type, 0, NULL); |
| 70 | } |
| 71 | |
| 72 | SCM |
| 73 | scm_make_foreign_object_1 (SCM type, void *val0) |
| 74 | { |
| 75 | return scm_make_foreign_object_n (type, 1, &val0); |
| 76 | } |
| 77 | |
| 78 | SCM |
| 79 | scm_make_foreign_object_2 (SCM type, void *val0, void *val1) |
| 80 | { |
| 81 | void *vals[2]; |
| 82 | |
| 83 | vals[0] = val0; |
| 84 | vals[1] = val1; |
| 85 | |
| 86 | return scm_make_foreign_object_n (type, 2, vals); |
| 87 | } |
| 88 | |
| 89 | SCM |
| 90 | scm_make_foreign_object_3 (SCM type, void *val0, void *val1, void *val2) |
| 91 | { |
| 92 | void *vals[3]; |
| 93 | |
| 94 | vals[0] = val0; |
| 95 | vals[1] = val1; |
| 96 | vals[2] = val2; |
| 97 | |
| 98 | return scm_make_foreign_object_n (type, 3, vals); |
| 99 | } |
| 100 | |
| 101 | SCM |
| 102 | scm_make_foreign_object_n (SCM type, size_t n, void *vals[]) |
| 103 | #define FUNC_NAME "make-foreign-object" |
| 104 | { |
| 105 | SCM obj; |
| 106 | SCM layout; |
| 107 | size_t i; |
| 108 | const char *layout_chars; |
| 109 | |
| 110 | SCM_VALIDATE_VTABLE (SCM_ARG1, type); |
| 111 | |
| 112 | layout = SCM_VTABLE_LAYOUT (type); |
| 113 | |
| 114 | if (scm_i_symbol_length (layout) / 2 < n) |
| 115 | scm_out_of_range (FUNC_NAME, scm_from_size_t (n)); |
| 116 | |
| 117 | layout_chars = scm_i_symbol_chars (layout); |
| 118 | for (i = 0; i < n; i++) |
| 119 | if (layout_chars[i * 2] != 'u') |
| 120 | scm_wrong_type_arg_msg (FUNC_NAME, 0, layout, "'u' field"); |
| 121 | |
| 122 | obj = scm_c_make_structv (type, 0, 0, NULL); |
| 123 | |
| 124 | for (i = 0; i < n; i++) |
| 125 | SCM_STRUCT_DATA_SET (obj, i, (scm_t_bits) vals[i]); |
| 126 | |
| 127 | return obj; |
| 128 | } |
| 129 | #undef FUNC_NAME |
| 130 | |
| 131 | scm_t_bits |
| 132 | scm_foreign_object_unsigned_ref (SCM obj, size_t n) |
| 133 | #define FUNC_NAME "foreign-object-ref" |
| 134 | { |
| 135 | SCM layout; |
| 136 | |
| 137 | SCM_VALIDATE_STRUCT (SCM_ARG1, obj); |
| 138 | |
| 139 | layout = SCM_STRUCT_LAYOUT (obj); |
| 140 | if (scm_i_symbol_length (layout) / 2 < n) |
| 141 | scm_out_of_range (FUNC_NAME, scm_from_size_t (n)); |
| 142 | |
| 143 | if (scm_i_symbol_ref (layout, n * 2) != 'u') |
| 144 | scm_wrong_type_arg_msg (FUNC_NAME, 0, layout, "'u' field"); |
| 145 | |
| 146 | return SCM_STRUCT_DATA_REF (obj, n); |
| 147 | } |
| 148 | #undef FUNC_NAME |
| 149 | |
| 150 | void |
| 151 | scm_foreign_object_unsigned_set_x (SCM obj, size_t n, scm_t_bits val) |
| 152 | #define FUNC_NAME "foreign-object-set!" |
| 153 | { |
| 154 | SCM layout; |
| 155 | |
| 156 | SCM_VALIDATE_STRUCT (SCM_ARG1, obj); |
| 157 | |
| 158 | layout = SCM_STRUCT_LAYOUT (obj); |
| 159 | if (scm_i_symbol_length (layout) / 2 < n) |
| 160 | scm_out_of_range (FUNC_NAME, scm_from_size_t (n)); |
| 161 | |
| 162 | if (scm_i_symbol_ref (layout, n * 2) != 'u') |
| 163 | scm_wrong_type_arg_msg (FUNC_NAME, 0, layout, "'u' field"); |
| 164 | |
| 165 | SCM_STRUCT_DATA_SET (obj, n, val); |
| 166 | } |
| 167 | #undef FUNC_NAME |
| 168 | |
| 169 | scm_t_signed_bits |
| 170 | scm_foreign_object_signed_ref (SCM obj, size_t n) |
| 171 | { |
| 172 | scm_t_bits bits = scm_foreign_object_unsigned_ref (obj, n); |
| 173 | return (scm_t_signed_bits) bits; |
| 174 | } |
| 175 | |
| 176 | void |
| 177 | scm_foreign_object_signed_set_x (SCM obj, size_t n, scm_t_signed_bits val) |
| 178 | { |
| 179 | scm_t_bits bits = (scm_t_bits) val; |
| 180 | scm_foreign_object_unsigned_set_x (obj, n, bits); |
| 181 | } |
| 182 | |
| 183 | void* |
| 184 | scm_foreign_object_ref (SCM obj, size_t n) |
| 185 | { |
| 186 | scm_t_bits bits = scm_foreign_object_unsigned_ref (obj, n); |
| 187 | return (void *) bits; |
| 188 | } |
| 189 | |
| 190 | void |
| 191 | scm_foreign_object_set_x (SCM obj, size_t n, void *val) |
| 192 | { |
| 193 | scm_t_bits bits = (scm_t_bits) val; |
| 194 | scm_foreign_object_unsigned_set_x (obj, n, bits); |
| 195 | } |
| 196 | |
| 197 | static void |
| 198 | invoke_finalizer (void *obj, void *data) |
| 199 | { |
| 200 | scm_call_1 (PTR2SCM (data), PTR2SCM (obj)); |
| 201 | } |
| 202 | |
| 203 | static SCM |
| 204 | sys_add_finalizer_x (SCM obj, SCM finalizer) |
| 205 | #define FUNC_NAME "%add-finalizer!" |
| 206 | { |
| 207 | SCM_VALIDATE_PROC (SCM_ARG2, finalizer); |
| 208 | |
| 209 | scm_i_add_finalizer (SCM2PTR (obj), invoke_finalizer, SCM2PTR (finalizer)); |
| 210 | |
| 211 | return SCM_UNSPECIFIED; |
| 212 | } |
| 213 | #undef FUNC_NAME |
| 214 | |
| 215 | static void |
| 216 | scm_init_foreign_object (void) |
| 217 | { |
| 218 | scm_c_define_gsubr ("%add-finalizer!", 2, 0, 0, |
| 219 | (scm_t_subr) sys_add_finalizer_x); |
| 220 | } |
| 221 | |
| 222 | void |
| 223 | scm_register_foreign_object (void) |
| 224 | { |
| 225 | scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION, |
| 226 | "scm_init_foreign_object", |
| 227 | (scm_t_extension_init_func)scm_init_foreign_object, |
| 228 | NULL); |
| 229 | } |