mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-12 13:44:56 +02:00
b0ab70c9bf
I used this command to play an unencrypted DVD, but maybe there is a better solution: ./vlc dvd:/dev/disk/ide/atapi/1/master/0/raw Current problems: gcc doesn't like MMX-EXT instructions, and refuses to have register %ebx being used in the main application. Grr. ,-- don't trust the CVS bot, it's Sam speaking here :) /
110 lines
4.3 KiB
C
110 lines
4.3 KiB
C
/*****************************************************************************
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* modules_core.h : Module management functions used by the core application.
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*****************************************************************************
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* Copyright (C) 2001 VideoLAN
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*
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* Authors: Samuel Hocevar <sam@zoy.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Inline functions for handling dynamic modules
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*****************************************************************************/
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/*****************************************************************************
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* module_load: load a dynamic library
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*****************************************************************************
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* This function loads a dynamically linked library using a system dependant
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* method, and returns a non-zero value on error, zero otherwise.
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*****************************************************************************/
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static __inline__ int
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module_load( char * psz_filename, module_handle_t * handle )
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{
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#ifdef SYS_BEOS
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*handle = load_add_on( psz_filename );
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return( *handle < 0 );
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#else
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/* Do not open modules with RTLD_GLOBAL, or we are going to get namespace
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* collisions when two modules have common public symbols */
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*handle = dlopen( psz_filename, RTLD_NOW );
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return( *handle == NULL );
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#endif
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}
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/*****************************************************************************
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* module_unload: unload a dynamic library
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*****************************************************************************
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* This function unloads a previously opened dynamically linked library
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* using a system dependant method. No return value is taken in consideration,
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* since some libraries sometimes refuse to close properly.
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*****************************************************************************/
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static __inline__ void
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module_unload( module_handle_t handle )
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{
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#ifdef SYS_BEOS
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unload_add_on( handle );
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#else
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dlclose( handle );
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#endif
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return;
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}
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/*****************************************************************************
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* module_getsymbol: get a symbol from a dynamic library
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*****************************************************************************
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* This function queries a loaded library for a symbol specified in a
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* string, and returns a pointer to it.
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* FIXME: under Unix we should maybe check for dlerror() instead of the
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* return value of dlsym, since we could have loaded a symbol really set
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* to NULL (quite unlikely, though).
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*****************************************************************************/
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static __inline__ void *
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module_getsymbol( module_handle_t handle, char * psz_function )
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{
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#ifdef SYS_BEOS
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void * p_symbol;
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if( B_OK == get_image_symbol( handle, psz_function,
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B_SYMBOL_TYPE_TEXT, &p_symbol ) )
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{
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return( p_symbol );
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}
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else
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{
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return( NULL );
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}
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#else
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return( dlsym( handle, psz_function ) );
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#endif
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}
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/*****************************************************************************
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* module_error: wrapper for dlerror()
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*****************************************************************************
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* This function returns the error message of the last module operation. It
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* returns the string "failed" on systems which do not have the dlerror()
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* function.
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*****************************************************************************/
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static __inline__ const char *
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module_error( void )
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{
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#ifdef SYS_BEOS
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return( "failed" );
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#else
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return( dlerror() );
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#endif
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}
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