1 /*****************************************************************************
2 * plugin.c : Low-level dynamic library handling
3 *****************************************************************************
4 * Copyright (C) 2001-2011 VLC authors and VideoLAN
6 * Authors: Sam Hocevar <sam@zoy.org>
7 * Ethan C. Baldridge <BaldridgeE@cadmus.com>
8 * Hans-Peter Jansen <hpj@urpla.net>
9 * Gildas Bazin <gbazin@videolan.org>
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU Lesser General Public License as published by
13 * the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this program; if not, write to the Free Software Foundation,
23 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
30 #include <vlc_common.h>
31 #include <vlc_charset.h>
32 #include "modules/modules.h"
36 static char *GetWindowsError( void )
39 int i
= 0, i_error
= GetLastError();
41 FormatMessageW( FORMAT_MESSAGE_FROM_SYSTEM
| FORMAT_MESSAGE_IGNORE_INSERTS
,
42 NULL
, i_error
, MAKELANGID (LANG_NEUTRAL
, SUBLANG_DEFAULT
),
45 /* Go to the end of the string */
46 while( !wmemchr( L
"\r\n\0", wmsg
[i
], 3 ) )
49 snwprintf( wmsg
+ i
, 256 - i
, L
" (error %i)", i_error
);
50 return FromWide( wmsg
);
53 int module_Load( vlc_object_t
*p_this
, const char *psz_file
,
54 module_handle_t
*p_handle
, bool lazy
)
56 wchar_t *wfile
= ToWide (psz_file
);
60 module_handle_t handle
;
62 /* FIXME: this is not thread-safe -- Courmisch */
63 UINT mode
= SetErrorMode (SEM_FAILCRITICALERRORS
);
64 SetErrorMode (mode
|SEM_FAILCRITICALERRORS
);
67 handle
= LoadLibraryW (wfile
);
76 char *psz_err
= GetWindowsError();
77 msg_Warn( p_this
, "cannot load module `%s' (%s)", psz_file
, psz_err
);
87 void module_Unload( module_handle_t handle
)
89 FreeLibrary( handle
);
92 void *module_Lookup( module_handle_t handle
, const char *psz_function
)
95 wchar_t wide
[strlen( psz_function
) + 1];
98 wide
[i
] = psz_function
[i
]; /* UTF-16 <- ASCII */
99 while( psz_function
[i
++] );
101 return (void *)GetProcAddress( handle
, wide
);
104 return (void *)GetProcAddress( handle
, (char *)psz_function
);