Commit | Line | Data |
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fc93b2bd MD |
1 | /* |
2 | * BabelTrace | |
3 | * | |
4 | * Format Registry | |
5 | * | |
ccd7e1c8 | 6 | * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
fc93b2bd | 7 | * |
ccd7e1c8 MD |
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: | |
fc93b2bd | 14 | * |
ccd7e1c8 MD |
15 | * The above copyright notice and this permission notice shall be included in |
16 | * all copies or substantial portions of the Software. | |
fc93b2bd MD |
17 | */ |
18 | ||
4c8bfb7e | 19 | #include <babeltrace/format.h> |
fc93b2bd MD |
20 | #include <glib.h> |
21 | #include <errno.h> | |
7fb21036 | 22 | #include <stdio.h> |
fc93b2bd | 23 | |
d2b8ea6b MD |
24 | struct walk_data { |
25 | FILE *fp; | |
26 | int iter; | |
27 | }; | |
28 | ||
fc93b2bd MD |
29 | static int init_done; |
30 | void __attribute__((constructor)) format_init(void); | |
31 | void __attribute__((destructor)) format_finalize(void); | |
32 | ||
33 | /* | |
34 | * Format registry hash table contains the registered formats. Format | |
35 | * registration is typically performed by a format plugin. | |
36 | * TODO: support plugin unload (unregistration of formats). | |
37 | */ | |
38 | GHashTable *format_registry; | |
39 | ||
40 | struct format *bt_lookup_format(GQuark qname) | |
41 | { | |
42 | if (!init_done) | |
43 | return NULL; | |
44 | return g_hash_table_lookup(format_registry, | |
4c8bfb7e | 45 | (gconstpointer) (unsigned long) qname); |
fc93b2bd MD |
46 | } |
47 | ||
7fb21036 MD |
48 | static void show_format(gpointer key, gpointer value, gpointer user_data) |
49 | { | |
d2b8ea6b | 50 | struct walk_data *data = user_data; |
7fb21036 | 51 | |
d2b8ea6b | 52 | fprintf(data->fp, "%s%s", data->iter ? ", " : "", |
7fb21036 | 53 | g_quark_to_string((GQuark) (unsigned long) key)); |
d2b8ea6b | 54 | data->iter++; |
7fb21036 MD |
55 | } |
56 | ||
57 | void bt_fprintf_format_list(FILE *fp) | |
58 | { | |
d2b8ea6b MD |
59 | struct walk_data data; |
60 | ||
61 | data.fp = fp; | |
62 | data.iter = 0; | |
63 | ||
64 | fprintf(fp, "Formats available: "); | |
7fb21036 MD |
65 | if (!init_done) |
66 | return; | |
d2b8ea6b MD |
67 | g_hash_table_foreach(format_registry, show_format, &data); |
68 | if (data.iter == 0) | |
69 | fprintf(fp, "<none>"); | |
70 | fprintf(fp, ".\n"); | |
7fb21036 MD |
71 | } |
72 | ||
4c8bfb7e | 73 | int bt_register_format(struct format *format) |
fc93b2bd MD |
74 | { |
75 | if (!init_done) | |
76 | format_init(); | |
77 | ||
4c8bfb7e | 78 | if (bt_lookup_format(format->name)) |
fc93b2bd MD |
79 | return -EEXIST; |
80 | ||
81 | g_hash_table_insert(format_registry, | |
4c8bfb7e | 82 | (gpointer) (unsigned long) format->name, |
fc93b2bd MD |
83 | format); |
84 | return 0; | |
85 | } | |
86 | ||
87 | void format_init(void) | |
88 | { | |
0860ab48 MD |
89 | if (init_done) |
90 | return; | |
fc93b2bd MD |
91 | format_registry = g_hash_table_new(g_direct_hash, g_direct_equal); |
92 | assert(format_registry); | |
93 | init_done = 1; | |
94 | } | |
95 | ||
4c8bfb7e | 96 | void format_finalize(void) |
fc93b2bd MD |
97 | { |
98 | g_hash_table_destroy(format_registry); | |
99 | } |