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
pa_modinfo_get_by_handle(lt_dlhandle dl,const char * module_name)41 pa_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
pa_modinfo_get_by_name(const char * name)71 pa_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
pa_modinfo_free(pa_modinfo * i)88 void 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