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fc93b2bd MD |
1 | /* |
2 | * BabelTrace | |
3 | * | |
4 | * Format 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 <glib.h> | |
24 | #include <errno.h> | |
25 | ||
26 | static int init_done; | |
27 | void __attribute__((constructor)) format_init(void); | |
28 | void __attribute__((destructor)) format_finalize(void); | |
29 | ||
30 | /* | |
31 | * Format registry hash table contains the registered formats. Format | |
32 | * registration is typically performed by a format plugin. | |
33 | * TODO: support plugin unload (unregistration of formats). | |
34 | */ | |
35 | GHashTable *format_registry; | |
36 | ||
37 | struct format *bt_lookup_format(GQuark qname) | |
38 | { | |
39 | if (!init_done) | |
40 | return NULL; | |
41 | return g_hash_table_lookup(format_registry, | |
42 | (gconstpointer) (unsigned long) qname) | |
43 | } | |
44 | ||
45 | int bt_register_format(const struct format *format) | |
46 | { | |
47 | if (!init_done) | |
48 | format_init(); | |
49 | ||
50 | if (bt_lookup_format(qname)) | |
51 | return -EEXIST; | |
52 | ||
53 | g_hash_table_insert(format_registry, | |
54 | (gconstpointer) (unsigned long) format->name, | |
55 | format); | |
56 | return 0; | |
57 | } | |
58 | ||
59 | void format_init(void) | |
60 | { | |
61 | format_registry = g_hash_table_new(g_direct_hash, g_direct_equal); | |
62 | assert(format_registry); | |
63 | init_done = 1; | |
64 | } | |
65 | ||
66 | int format_finalize(void) | |
67 | { | |
68 | g_hash_table_destroy(format_registry); | |
69 | } |