Babeltrace type: build warning cleanup
[babeltrace.git] / types / types.c
1 /*
2 * types.c
3 *
4 * BabelTrace - Converter
5 *
6 * Types registry.
7 *
8 * Copyright 2010 - 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 /*
26 * Type hash table contains the registered types. Type registration is typically
27 * performed by a type plugin.
28 * TODO: support plugin unload (unregistration of types).
29 */
30 GHashTable *type_classes;
31
32 struct type_class *lookup_type(GQuark qname)
33 {
34 return g_hash_table_lookup(type_classes,
35 (gconstpointer) (unsigned long) qname);
36 }
37
38 static void free_type(struct type_class *type_class)
39 {
40 type_class->free(type_class);
41 }
42
43 int register_type(struct type_class *type_class)
44 {
45 if (lookup_type(type_class->name))
46 return -EEXIST;
47
48 g_hash_table_insert(type_classes,
49 (gpointer) (unsigned long) type_class->name,
50 type_class);
51 return 0;
52 }
53
54 void type_ref(struct type_class *type_class)
55 {
56 type_class->ref++;
57 }
58
59 void type_unref(struct type_class *type_class)
60 {
61 if (!--type_class->ref)
62 free_type(type_class);
63 }
64
65 int init_types(void)
66 {
67 type_classes = g_hash_table_new_full(g_direct_hash, g_direct_equal,
68 NULL, (GDestroyNotify) free_type);
69 if (!type_classes)
70 return -ENOMEM;
71 return 0;
72 }
73
74 int finalize_types(void)
75 {
76 g_hash_table_destroy(type_classes);
77 return 0;
78 }
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