src/os2/plugin.c

   1 /*****************************************************************************
   2  * plugin.c : Low-level dynamic library handling
   3  *****************************************************************************
   4  * Copyright (C) 2001-2007 VLC authors and VideoLAN
   5  * Copyright (C) 2012 KO Myung-Hun
   6  *
   7  * Authors: Sam Hocevar <sam@zoy.org>
   8  *          Ethan C. Baldridge <BaldridgeE@cadmus.com>
   9  *          Hans-Peter Jansen <hpj@urpla.net>
  10  *          Gildas Bazin <gbazin@videolan.org>
  11  *          KO Myung-Hun <komh@chollian.net>
  12  *
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under the terms of the GNU Lesser General Public License as published by
  15  * the Free Software Foundation; either version 2.1 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  21  * GNU Lesser General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU Lesser General Public License
  24  * along with this program; if not, write to the Free Software Foundation,
  25  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <string.h>
  33 #include <sys/types.h>
  34 #include <dlfcn.h>
  35
  36 #include <vlc_common.h>
  37 #include <vlc_charset.h>
  38 #include "modules/modules.h"
  39
  40 void *vlc_dlopen(const char *psz_file, bool lazy )
  41 {
  42     const int flags = lazy ? RTLD_LAZY : RTLD_NOW;
  43     char *path = ToLocaleDup( psz_file );
  44     if (unlikely(path == NULL))
  45         return NULL;
  46
  47     void *handle = dlopen( path, flags );
  48     free( path );
  49     return handle;
  50 }
  51
  52 int vlc_dlclose(void *handle)
  53 {
  54     return dlclose( handle );
  55 }
  56
  57 void *vlc_dlsym(void *handle, const char *psz_function)
  58 {
  59     char buf[strlen(psz_function) + 2];
  60     buf[0] = '_';
  61     strcpy(buf + 1, psz_function);
  62     return dlsym( handle, buf );
  63 }
  64
  65 char *vlc_dlerror(void)
  66 {
  67     const char *errmsg = dlerror();
  68     return (errmsg != NULL) ? FromLocaleDup(errmsg) : NULL;
  69 }