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  * $Id$
   7  *
   8  * Authors: Sam Hocevar <sam@zoy.org>
   9  *          Ethan C. Baldridge <BaldridgeE@cadmus.com>
  10  *          Hans-Peter Jansen <hpj@urpla.net>
  11  *          Gildas Bazin <gbazin@videolan.org>
  12  *          KO Myung-Hun <komh@chollian.net>
  13  *
  14  * This program is free software; you can redistribute it and/or modify it
  15  * under the terms of the GNU Lesser General Public License as published by
  16  * the Free Software Foundation; either version 2.1 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  22  * GNU Lesser General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * along with this program; if not, write to the Free Software Foundation,
  26  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <string.h>
  34 #include <sys/types.h>
  35 #include <dlfcn.h>
  36
  37 #include <vlc_common.h>
  38 #include <vlc_charset.h>
  39 #include "modules/modules.h"
  40
  41 void *vlc_dlopen(const char *psz_file, bool lazy )
  42 {
  43     const int flags = lazy ? RTLD_LAZY : RTLD_NOW;
  44     char *path = ToLocaleDup( psz_file );
  45     if (unlikely(path == NULL))
  46         return NULL;
  47
  48     void *handle = dlopen( path, flags );
  49     free( path );
  50     return handle;
  51 }
  52
  53 int vlc_dlclose(void *handle)
  54 {
  55     return dlclose( handle );
  56 }
  57
  58 void *vlc_dlsym(void *handle, const char *psz_function)
  59 {
  60     char buf[strlen(psz_function) + 2];
  61     buf[0] = '_';
  62     strcpy(buf + 1, psz_function);
  63     return dlsym( handle, buf );
  64 }
  65
  66 char *vlc_dlerror(void)
  67 {
  68     const char *errmsg = dlerror();
  69     return (errmsg != NULL) ? FromLocaleDup(errmsg) : NULL;
  70 }