Build fix
[babeltrace.git] / formats / registry.c
1 /*
2 * BabelTrace
3 *
4 * Format Registry
5 *
6 * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 */
18
19 #include <babeltrace/format.h>
20 #include <glib.h>
21 #include <errno.h>
22
23 static int init_done;
24 void __attribute__((constructor)) format_init(void);
25 void __attribute__((destructor)) format_finalize(void);
26
27 /*
28 * Format registry hash table contains the registered formats. Format
29 * registration is typically performed by a format plugin.
30 * TODO: support plugin unload (unregistration of formats).
31 */
32 GHashTable *format_registry;
33
34 struct format *bt_lookup_format(GQuark qname)
35 {
36 if (!init_done)
37 return NULL;
38 return g_hash_table_lookup(format_registry,
39 (gconstpointer) (unsigned long) qname);
40 }
41
42 int bt_register_format(struct format *format)
43 {
44 if (!init_done)
45 format_init();
46
47 if (bt_lookup_format(format->name))
48 return -EEXIST;
49
50 g_hash_table_insert(format_registry,
51 (gpointer) (unsigned long) format->name,
52 format);
53 return 0;
54 }
55
56 void format_init(void)
57 {
58 format_registry = g_hash_table_new(g_direct_hash, g_direct_equal);
59 assert(format_registry);
60 init_done = 1;
61 }
62
63 void format_finalize(void)
64 {
65 g_hash_table_destroy(format_registry);
66 }
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