I/O structures accessors generation (work in progress)
[babeltrace.git] / types / types.c
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 }
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