code.delx.au - pulseaudio/blob - src/pulsecore/modinfo.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as
  10   published by the Free Software Foundation; either version 2 of the
  11   License, or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public
  19   License along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <ltdl.h>
  29
  30 #include <pulse/xmalloc.h>
  31
  32 #include <pulsecore/core-util.h>
  33 #include <pulsecore/log.h>
  34 #include <pulsecore/macro.h>
  35 #include <pulsecore/ltdl-helper.h>
  36
  37 #include "modinfo.h"
  38
  39 #define PA_SYMBOL_AUTHOR "pa__get_author"
  40 #define PA_SYMBOL_DESCRIPTION "pa__get_description"
  41 #define PA_SYMBOL_USAGE "pa__get_usage"
  42 #define PA_SYMBOL_VERSION "pa__get_version"
  43
  44 pa_modinfo *pa_modinfo_get_by_handle(lt_dlhandle dl, const char *module_name) {
  45     pa_modinfo *i;
  46     const char* (*func)(void);
  47
  48     pa_assert(dl);
  49
  50     i = pa_xnew0(pa_modinfo, 1);
  51
  52     if ((func = (const char* (*)(void)) pa_load_sym(dl, module_name, PA_SYMBOL_AUTHOR)))
  53         i->author = pa_xstrdup(func());
  54
  55     if ((func = (const char* (*)(void)) pa_load_sym(dl, module_name, PA_SYMBOL_DESCRIPTION)))
  56         i->description = pa_xstrdup(func());
  57
  58     if ((func = (const char* (*)(void)) pa_load_sym(dl, module_name, PA_SYMBOL_USAGE)))
  59         i->usage = pa_xstrdup(func());
  60
  61     if ((func = (const char* (*)(void)) pa_load_sym(dl, module_name, PA_SYMBOL_VERSION)))
  62         i->version = pa_xstrdup(func());
  63
  64     return i;
  65 }
  66
  67 pa_modinfo *pa_modinfo_get_by_name(const char *name) {
  68     lt_dlhandle dl;
  69     pa_modinfo *i;
  70
  71     pa_assert(name);
  72
  73     if (!(dl = lt_dlopenext(name))) {
  74         pa_log("Failed to open module \"%s\": %s", name, lt_dlerror());
  75         return NULL;
  76     }
  77
  78     i = pa_modinfo_get_by_handle(dl, name);
  79     lt_dlclose(dl);
  80
  81     return i;
  82 }
  83
  84 void pa_modinfo_free(pa_modinfo *i) {
  85     pa_assert(i);
  86
  87     pa_xfree(i->author);
  88     pa_xfree(i->description);
  89     pa_xfree(i->usage);
  90     pa_xfree(i->version);
  91     pa_xfree(i);
  92 }