| 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 type * |
| 27 | lookup_type_scope(GQuark type_name, struct type_scope *scope) |
| 28 | { |
| 29 | return g_hash_table_lookup(scope->types, |
| 30 | (gconstpointer) (unsigned long) type_name); |
| 31 | } |
| 32 | |
| 33 | struct type *lookup_type(GQuark type_name, struct type_scope *scope) |
| 34 | { |
| 35 | struct type *type; |
| 36 | |
| 37 | while (scope) { |
| 38 | type = lookup_type_scope(type_name, scope); |
| 39 | if (type) |
| 40 | return type; |
| 41 | scope = scope->parent_scope; |
| 42 | } |
| 43 | return NULL; |
| 44 | } |
| 45 | |
| 46 | int register_type(GQuark name, struct type *type, struct type_scope *scope) |
| 47 | { |
| 48 | if (!name) |
| 49 | return -EPERM; |
| 50 | |
| 51 | /* Only lookup in local scope */ |
| 52 | if (lookup_type_scope(name, scope)) |
| 53 | return -EEXIST; |
| 54 | |
| 55 | g_hash_table_insert(scope->types, |
| 56 | (gpointer) (unsigned long) name, |
| 57 | type); |
| 58 | type_ref(type); |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static |
| 63 | struct declaration * |
| 64 | lookup_declaration_scope(GQuark field_name, struct declaration_scope *scope) |
| 65 | { |
| 66 | return g_hash_table_lookup(scope->declarations, |
| 67 | (gconstpointer) (unsigned long) field_name); |
| 68 | } |
| 69 | |
| 70 | struct declaration * |
| 71 | lookup_declaration(GQuark field_name, struct declaration_scope *scope) |
| 72 | { |
| 73 | struct declaration *declaration; |
| 74 | |
| 75 | while (scope) { |
| 76 | declaration = lookup_declaration_scope(field_name, scope); |
| 77 | if (declaration) |
| 78 | return declaration; |
| 79 | scope = scope->parent_scope; |
| 80 | } |
| 81 | return NULL; |
| 82 | } |
| 83 | |
| 84 | int register_declaration(GQuark field_name, struct declaration *declaration, |
| 85 | struct declaration_scope *scope) |
| 86 | { |
| 87 | if (!field_name) |
| 88 | return -EPERM; |
| 89 | |
| 90 | /* Only lookup in local scope */ |
| 91 | if (lookup_declaration_scope(field_name, scope)) |
| 92 | return -EEXIST; |
| 93 | |
| 94 | g_hash_table_insert(scope->declarations, |
| 95 | (gpointer) (unsigned long) field_name, |
| 96 | declaration); |
| 97 | declaration_ref(declaration); |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | void type_ref(struct type *type) |
| 102 | { |
| 103 | type->ref++; |
| 104 | } |
| 105 | |
| 106 | void type_unref(struct type *type) |
| 107 | { |
| 108 | if (!--type->ref) |
| 109 | type->type_free(type); |
| 110 | } |
| 111 | |
| 112 | void declaration_ref(struct declaration *declaration) |
| 113 | { |
| 114 | declaration->ref++; |
| 115 | } |
| 116 | |
| 117 | void declaration_unref(struct declaration *declaration) |
| 118 | { |
| 119 | if (!--declaration->ref) |
| 120 | declaration->type->declaration_free(declaration); |
| 121 | } |
| 122 | |
| 123 | struct type_scope * |
| 124 | new_type_scope(struct type_scope *parent_scope) |
| 125 | { |
| 126 | struct type_scope *scope = g_new(struct type_scope, 1); |
| 127 | |
| 128 | scope->types = g_hash_table_new_full(g_direct_hash, |
| 129 | g_direct_equal, NULL, |
| 130 | (GDestroyNotify) type_unref); |
| 131 | scope->parent_scope = parent_scope; |
| 132 | return scope; |
| 133 | } |
| 134 | |
| 135 | void free_type_scope(struct type_scope *scope) |
| 136 | { |
| 137 | g_hash_table_destroy(scope->types); |
| 138 | g_free(scope); |
| 139 | } |
| 140 | |
| 141 | struct declaration_scope * |
| 142 | new_declaration_scope(struct declaration_scope *parent_scope) |
| 143 | { |
| 144 | struct declaration_scope *scope = g_new(struct declaration_scope, 1); |
| 145 | |
| 146 | scope->declarations = g_hash_table_new_full(g_direct_hash, |
| 147 | g_direct_equal, NULL, |
| 148 | (GDestroyNotify) declaration_unref); |
| 149 | scope->parent_scope = parent_scope; |
| 150 | return scope; |
| 151 | } |
| 152 | |
| 153 | void free_declaration_scope(struct declaration_scope *scope) |
| 154 | { |
| 155 | g_hash_table_destroy(scope->declarations); |
| 156 | g_free(scope); |
| 157 | } |