| 1 | /* |
| 2 | * types.c |
| 3 | * |
| 4 | * BabelTrace - Converter |
| 5 | * |
| 6 | * Types registry. |
| 7 | * |
| 8 | * Copyright 2010, 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 9 | * |
| 10 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 11 | * of this software and associated documentation files (the "Software"), to deal |
| 12 | * in the Software without restriction, including without limitation the rights |
| 13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 14 | * copies of the Software, and to permit persons to whom the Software is |
| 15 | * furnished to do so, subject to the following conditions: |
| 16 | * |
| 17 | * The above copyright notice and this permission notice shall be included in |
| 18 | * all copies or substantial portions of the Software. |
| 19 | */ |
| 20 | |
| 21 | #include <babeltrace/format.h> |
| 22 | #include <glib.h> |
| 23 | #include <errno.h> |
| 24 | |
| 25 | static |
| 26 | struct declaration * |
| 27 | lookup_type_declaration_scope(GQuark type_name, struct type_scope *scope) |
| 28 | { |
| 29 | return g_hash_table_lookup(scope->type_declarations, |
| 30 | (gconstpointer) (unsigned long) type_name); |
| 31 | } |
| 32 | |
| 33 | struct declaration *lookup_type_declaration(GQuark type_name, struct type_scope *scope) |
| 34 | { |
| 35 | struct declaration *declaration; |
| 36 | |
| 37 | while (scope) { |
| 38 | declaration = lookup_type_declaration_scope(type_name, scope); |
| 39 | if (declaration) |
| 40 | return declaration; |
| 41 | scope = scope->parent_scope; |
| 42 | } |
| 43 | return NULL; |
| 44 | } |
| 45 | |
| 46 | int register_type_declaration(GQuark name, struct declaration *declaration, |
| 47 | struct type_scope *scope) |
| 48 | { |
| 49 | if (!name) |
| 50 | return -EPERM; |
| 51 | |
| 52 | /* Only lookup in local scope */ |
| 53 | if (lookup_type_declaration_scope(name, scope)) |
| 54 | return -EEXIST; |
| 55 | |
| 56 | g_hash_table_insert(scope->type_declarations, |
| 57 | (gpointer) (unsigned long) name, |
| 58 | declaration); |
| 59 | declaration_ref(declaration); |
| 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | static |
| 64 | struct declaration * |
| 65 | lookup_field_declaration_scope(GQuark field_name, struct declaration_scope *scope) |
| 66 | { |
| 67 | return g_hash_table_lookup(scope->declarations, |
| 68 | (gconstpointer) (unsigned long) field_name); |
| 69 | } |
| 70 | |
| 71 | struct declaration * |
| 72 | lookup_field_declaration(GQuark field_name, struct declaration_scope *scope) |
| 73 | { |
| 74 | struct declaration *declaration; |
| 75 | |
| 76 | while (scope) { |
| 77 | declaration = lookup_field_declaration_scope(field_name, scope); |
| 78 | if (declaration) |
| 79 | return declaration; |
| 80 | scope = scope->parent_scope; |
| 81 | } |
| 82 | return NULL; |
| 83 | } |
| 84 | |
| 85 | int register_field_declaration(GQuark field_name, struct declaration *declaration, |
| 86 | struct declaration_scope *scope) |
| 87 | { |
| 88 | if (!field_name) |
| 89 | return -EPERM; |
| 90 | |
| 91 | /* Only lookup in local scope */ |
| 92 | if (lookup_field_declaration_scope(field_name, scope)) |
| 93 | return -EEXIST; |
| 94 | |
| 95 | g_hash_table_insert(scope->declarations, |
| 96 | (gpointer) (unsigned long) field_name, |
| 97 | declaration); |
| 98 | declaration_ref(declaration); |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | void type_ref(struct type *type) |
| 103 | { |
| 104 | type->ref++; |
| 105 | } |
| 106 | |
| 107 | void type_unref(struct type *type) |
| 108 | { |
| 109 | if (!--type->ref) |
| 110 | type->type_free(type); |
| 111 | } |
| 112 | |
| 113 | void declaration_ref(struct declaration *declaration) |
| 114 | { |
| 115 | declaration->ref++; |
| 116 | } |
| 117 | |
| 118 | void declaration_unref(struct declaration *declaration) |
| 119 | { |
| 120 | if (!--declaration->ref) |
| 121 | declaration->type->declaration_free(declaration); |
| 122 | } |
| 123 | |
| 124 | struct type_scope * |
| 125 | new_type_scope(struct type_scope *parent_scope) |
| 126 | { |
| 127 | struct type_scope *scope = g_new(struct type_scope, 1); |
| 128 | |
| 129 | scope->type_declarations = g_hash_table_new_full(g_direct_hash, |
| 130 | g_direct_equal, NULL, |
| 131 | (GDestroyNotify) declaration_unref); |
| 132 | scope->struct_types = g_hash_table_new_full(g_direct_hash, |
| 133 | g_direct_equal, NULL, |
| 134 | (GDestroyNotify) type_unref); |
| 135 | scope->variant_types = g_hash_table_new_full(g_direct_hash, |
| 136 | g_direct_equal, NULL, |
| 137 | (GDestroyNotify) type_unref); |
| 138 | scope->enum_types = g_hash_table_new_full(g_direct_hash, |
| 139 | g_direct_equal, NULL, |
| 140 | (GDestroyNotify) type_unref); |
| 141 | scope->parent_scope = parent_scope; |
| 142 | return scope; |
| 143 | } |
| 144 | |
| 145 | void free_type_scope(struct type_scope *scope) |
| 146 | { |
| 147 | g_hash_table_destroy(scope->enum_types); |
| 148 | g_hash_table_destroy(scope->variant_types); |
| 149 | g_hash_table_destroy(scope->struct_types); |
| 150 | g_hash_table_destroy(scope->type_declarations); |
| 151 | g_free(scope); |
| 152 | } |
| 153 | |
| 154 | static |
| 155 | struct type_struct *lookup_struct_type_scope(GQuark struct_name, |
| 156 | struct type_scope *scope) |
| 157 | { |
| 158 | return g_hash_table_lookup(scope->struct_types, |
| 159 | (gconstpointer) (unsigned long) struct_name); |
| 160 | } |
| 161 | |
| 162 | struct type_struct *lookup_struct_type(GQuark struct_name, |
| 163 | struct type_scope *scope) |
| 164 | { |
| 165 | struct type_struct *type; |
| 166 | |
| 167 | while (scope) { |
| 168 | type = lookup_struct_type_scope(struct_name, scope); |
| 169 | if (type) |
| 170 | return type; |
| 171 | scope = scope->parent_scope; |
| 172 | } |
| 173 | return NULL; |
| 174 | } |
| 175 | |
| 176 | int register_struct_type(GQuark struct_name, struct type_struct *struct_type, |
| 177 | struct type_scope *scope) |
| 178 | { |
| 179 | if (!struct_name) |
| 180 | return -EPERM; |
| 181 | |
| 182 | /* Only lookup in local scope */ |
| 183 | if (lookup_struct_type_scope(struct_name, scope)) |
| 184 | return -EEXIST; |
| 185 | |
| 186 | g_hash_table_insert(scope->struct_types, |
| 187 | (gpointer) (unsigned long) struct_name, |
| 188 | struct_type); |
| 189 | type_ref(&struct_type->p); |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | static |
| 194 | struct type_variant *lookup_variant_type_scope(GQuark variant_name, |
| 195 | struct type_scope *scope) |
| 196 | { |
| 197 | return g_hash_table_lookup(scope->variant_types, |
| 198 | (gconstpointer) (unsigned long) variant_name); |
| 199 | } |
| 200 | |
| 201 | struct type_variant *lookup_variant_type(GQuark variant_name, |
| 202 | struct type_scope *scope) |
| 203 | { |
| 204 | struct type_variant *type; |
| 205 | |
| 206 | while (scope) { |
| 207 | type = lookup_variant_type_scope(variant_name, scope); |
| 208 | if (type) |
| 209 | return type; |
| 210 | scope = scope->parent_scope; |
| 211 | } |
| 212 | return NULL; |
| 213 | } |
| 214 | |
| 215 | int register_variant_type(GQuark variant_name, |
| 216 | struct type_variant *variant_type, |
| 217 | struct type_scope *scope) |
| 218 | { |
| 219 | if (!variant_name) |
| 220 | return -EPERM; |
| 221 | |
| 222 | /* Only lookup in local scope */ |
| 223 | if (lookup_variant_type_scope(variant_name, scope)) |
| 224 | return -EEXIST; |
| 225 | |
| 226 | g_hash_table_insert(scope->variant_types, |
| 227 | (gpointer) (unsigned long) variant_name, |
| 228 | variant_type); |
| 229 | type_ref(&variant_type->p); |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | static |
| 234 | struct type_enum *lookup_enum_type_scope(GQuark enum_name, |
| 235 | struct type_scope *scope) |
| 236 | { |
| 237 | return g_hash_table_lookup(scope->enum_types, |
| 238 | (gconstpointer) (unsigned long) enum_name); |
| 239 | } |
| 240 | |
| 241 | struct type_enum *lookup_enum_type(GQuark enum_name, |
| 242 | struct type_scope *scope) |
| 243 | { |
| 244 | struct type_enum *type; |
| 245 | |
| 246 | while (scope) { |
| 247 | type = lookup_enum_type_scope(enum_name, scope); |
| 248 | if (type) |
| 249 | return type; |
| 250 | scope = scope->parent_scope; |
| 251 | } |
| 252 | return NULL; |
| 253 | } |
| 254 | |
| 255 | int register_enum_type(GQuark enum_name, struct type_enum *enum_type, |
| 256 | struct type_scope *scope) |
| 257 | { |
| 258 | if (!enum_name) |
| 259 | return -EPERM; |
| 260 | |
| 261 | /* Only lookup in local scope */ |
| 262 | if (lookup_enum_type_scope(enum_name, scope)) |
| 263 | return -EEXIST; |
| 264 | |
| 265 | g_hash_table_insert(scope->enum_types, |
| 266 | (gpointer) (unsigned long) enum_name, |
| 267 | enum_type); |
| 268 | type_ref(&enum_type->p); |
| 269 | return 0; |
| 270 | } |
| 271 | |
| 272 | struct declaration_scope * |
| 273 | new_declaration_scope(struct declaration_scope *parent_scope) |
| 274 | { |
| 275 | struct declaration_scope *scope = g_new(struct declaration_scope, 1); |
| 276 | |
| 277 | scope->declarations = g_hash_table_new_full(g_direct_hash, |
| 278 | g_direct_equal, NULL, |
| 279 | (GDestroyNotify) declaration_unref); |
| 280 | scope->parent_scope = parent_scope; |
| 281 | return scope; |
| 282 | } |
| 283 | |
| 284 | void free_declaration_scope(struct declaration_scope *scope) |
| 285 | { |
| 286 | g_hash_table_destroy(scope->declarations); |
| 287 | g_free(scope); |
| 288 | } |