You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
102 lines
4.1 KiB
102 lines
4.1 KiB
/*****************************************************************************
|
|
* modules_core.h : Module management functions used by the core application.
|
|
*****************************************************************************
|
|
* Copyright (C) 2001 VideoLAN
|
|
*
|
|
* Authors: Samuel Hocevar <sam@zoy.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Inline functions for handling dynamic modules
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* module_load: load a dynamic library
|
|
*****************************************************************************
|
|
* This function loads a dynamically linked library using a system dependant
|
|
* method, and returns a non-zero value on error, zero otherwise.
|
|
*****************************************************************************/
|
|
static __inline__ int
|
|
module_load( char * psz_filename, module_handle_t * handle )
|
|
{
|
|
#ifdef SYS_BEOS
|
|
*handle = load_add_on( psz_filename );
|
|
return( *handle < 0 );
|
|
#else
|
|
/* Do not open modules with RTLD_GLOBAL, or we are going to get namespace
|
|
* collisions when two modules have common public symbols */
|
|
*handle = dlopen( psz_filename, RTLD_NOW );
|
|
return( *handle == NULL );
|
|
#endif
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* module_unload: unload a dynamic library
|
|
*****************************************************************************
|
|
* This function unloads a previously opened dynamically linked library
|
|
* using a system dependant method. No return value is taken in consideration,
|
|
* since some libraries sometimes refuse to close properly.
|
|
*****************************************************************************/
|
|
static __inline__ void
|
|
module_unload( module_handle_t handle )
|
|
{
|
|
#ifdef SYS_BEOS
|
|
unload_add_on( handle );
|
|
#else
|
|
dlclose( handle );
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* module_getsymbol: get a symbol from a dynamic library
|
|
*****************************************************************************
|
|
* This function queries a loaded library for a symbol specified in a
|
|
* string, and returns a pointer to it.
|
|
* FIXME: under Unix we should maybe check for dlerror() instead of the
|
|
* return value of dlsym, since we could have loaded a symbol really set
|
|
* to NULL (quite unlikely, though).
|
|
*****************************************************************************/
|
|
static __inline__ void *
|
|
module_getsymbol( module_handle_t handle, char * psz_function )
|
|
{
|
|
#ifdef SYS_BEOS
|
|
void * p_symbol;
|
|
get_image_symbol( handle, psz_function, B_SYMBOL_TYPE_TEXT, &p_symbol );
|
|
return( p_symbol );
|
|
#else
|
|
return( dlsym( handle, psz_function ) );
|
|
#endif
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* module_error: wrapper for dlerror()
|
|
*****************************************************************************
|
|
* This function returns the error message of the last module operation. It
|
|
* returns the string "failed" on systems which do not have the dlerror()
|
|
* function.
|
|
*****************************************************************************/
|
|
static __inline__ const char *
|
|
module_error( void )
|
|
{
|
|
#ifdef SYS_BEOS
|
|
return( "failed" );
|
|
#else
|
|
return( dlerror() );
|
|
#endif
|
|
}
|
|
|
|
|