1/***
2  This file is part of PulseAudio.
3
4  Copyright 2004-2006 Lennart Poettering
5
6  PulseAudio is free software; you can redistribute it and/or modify
7  it under the terms of the GNU Lesser General Public License as
8  published by the Free Software Foundation; either version 2.1 of the
9  License, or (at your option) any later version.
10
11  PulseAudio is distributed in the hope that it will be useful, but
12  WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  General Public License for more details.
15
16  You should have received a copy of the GNU Lesser General Public
17  License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
18***/
19
20#ifdef HAVE_CONFIG_H
21#include <config.h>
22#endif
23
24#include <ltdl.h>
25
26#include <pulse/xmalloc.h>
27
28#include <pulsecore/log.h>
29#include <pulsecore/macro.h>
30#include <pulsecore/ltdl-helper.h>
31
32#include "modinfo.h"
33
34#define PA_SYMBOL_AUTHOR "pa__get_author"
35#define PA_SYMBOL_DESCRIPTION "pa__get_description"
36#define PA_SYMBOL_USAGE "pa__get_usage"
37#define PA_SYMBOL_VERSION "pa__get_version"
38#define PA_SYMBOL_DEPRECATED "pa__get_deprecated"
39#define PA_SYMBOL_LOAD_ONCE "pa__load_once"
40
41pa_modinfo *pa_modinfo_get_by_handle(lt_dlhandle dl, const char *module_name) {
42    pa_modinfo *i;
43    const char* (*func)(void);
44    bool (*func2) (void);
45
46    pa_assert(dl);
47
48    i = pa_xnew0(pa_modinfo, 1);
49
50    if ((func = (const char* (*)(void)) pa_load_sym(dl, module_name, PA_SYMBOL_AUTHOR)))
51        i->author = pa_xstrdup(func());
52
53    if ((func = (const char* (*)(void)) pa_load_sym(dl, module_name, PA_SYMBOL_DESCRIPTION)))
54        i->description = pa_xstrdup(func());
55
56    if ((func = (const char* (*)(void)) pa_load_sym(dl, module_name, PA_SYMBOL_USAGE)))
57        i->usage = pa_xstrdup(func());
58
59    if ((func = (const char* (*)(void)) pa_load_sym(dl, module_name, PA_SYMBOL_VERSION)))
60        i->version = pa_xstrdup(func());
61
62    if ((func = (const char* (*)(void)) pa_load_sym(dl, module_name, PA_SYMBOL_DEPRECATED)))
63        i->deprecated = pa_xstrdup(func());
64
65    if ((func2 = (bool (*)(void)) pa_load_sym(dl, module_name, PA_SYMBOL_LOAD_ONCE)))
66        i->load_once = func2();
67
68    return i;
69}
70
71pa_modinfo *pa_modinfo_get_by_name(const char *name) {
72    lt_dlhandle dl;
73    pa_modinfo *i;
74
75    pa_assert(name);
76
77    if (!(dl = lt_dlopenext(name))) {
78        pa_log("Failed to open module \"%s\": %s", name, lt_dlerror());
79        return NULL;
80    }
81
82    i = pa_modinfo_get_by_handle(dl, name);
83    lt_dlclose(dl);
84
85    return i;
86}
87
88void pa_modinfo_free(pa_modinfo *i) {
89    pa_assert(i);
90
91    pa_xfree(i->author);
92    pa_xfree(i->description);
93    pa_xfree(i->usage);
94    pa_xfree(i->version);
95    pa_xfree(i->deprecated);
96    pa_xfree(i);
97}
98