Use statically known types, use hash for formats
[babeltrace.git] / types / types.c
1 /*
2 * BabelTrace - Converter
3 *
4 * Types registry.
5 *
6 * Copyright (c) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include <ctf/ctf-types.h>
24 #include <glib.h>
25 #include <errno.h>
26
27 /*
28 * Type class hash table contains the registered type classes. Type class
29 * registration is typically performed by a plugin.
30 * TODO: support plugin unload (unregistration of type classes).
31 */
32 GHashTable *type_classes;
33
34 struct type_class *ctf_lookup_type_class(GQuark qname)
35 {
36 return g_hash_table_lookup(type_classes,
37 (gconstpointer) (unsigned long) qname)
38 }
39
40 int ctf_register_type_class(const char *name,
41 void (*read)(),
42 void (*write)())
43 {
44 struct type_class tc = g_new(struct type_class, 1);
45 GQuark qname = g_quark_from_string(name);
46
47 if (ctf_lookup_type_class(qname))
48 return -EEXIST;
49
50 g_hash_table_insert(type_classes,
51 (gconstpointer) (unsigned long) qname,
52 tc);
53 return 0;
54 }
55
56 int ctf_init_types(void)
57 {
58 type_classes = g_hash_table_new_full(g_direct_hash, g_direct_equal,
59 NULL, g_free);
60 if (!type_classes)
61 return -ENOMEM;
62 return 0;
63 }
64
65 int ctf_finalize_types(void)
66 {
67 g_hash_table_destroy(type_classes);
68 }
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