1 /*****************************************************************************
2 * modules.c : Builtin and plugin modules management functions
3 *****************************************************************************
4 * Copyright (C) 2001-2007 the VideoLAN team
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>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
31 #include <vlc_common.h>
32 #include <vlc_plugin.h>
33 #include <vlc_memory.h>
34 #include <vlc_modules.h>
37 #include <stdlib.h> /* free(), strtol() */
38 #include <stdio.h> /* sprintf() */
39 #include <string.h> /* strdup() */
42 #include <sys/types.h>
43 #ifdef HAVE_SYS_STAT_H
44 # include <sys/stat.h>
53 #include "config/configuration.h"
56 #include "vlc_arrays.h"
58 #include "modules/modules.h"
60 static module_bank_t *p_module_bank = NULL;
61 static vlc_mutex_t module_lock = VLC_STATIC_MUTEX;
63 int vlc_entry__main( module_t * );
65 /*****************************************************************************
67 *****************************************************************************/
68 #ifdef HAVE_DYNAMIC_PLUGINS
69 static void AllocateAllPlugins( vlc_object_t *, module_bank_t * );
70 static void AllocatePluginDir( vlc_object_t *, module_bank_t *, const char *,
72 static int AllocatePluginFile( vlc_object_t *, module_bank_t *, const char *,
74 static module_t * AllocatePlugin( vlc_object_t *, const char * );
76 static int AllocateBuiltinModule( vlc_object_t *, int ( * ) ( module_t * ) );
77 static void DeleteModule ( module_bank_t *, module_t * );
78 #ifdef HAVE_DYNAMIC_PLUGINS
79 static void DupModule ( module_t * );
80 static void UndupModule ( module_t * );
83 #undef module_InitBank
87 * Creates a module bank structure which will be filled later
88 * on with all the modules found.
89 * \param p_this vlc object structure
92 void module_InitBank( vlc_object_t *p_this )
94 module_bank_t *p_bank = NULL;
96 vlc_mutex_lock( &module_lock );
98 if( p_module_bank == NULL )
100 p_bank = calloc (1, sizeof(*p_bank));
102 p_bank->i_cache = p_bank->i_loaded_cache = 0;
103 p_bank->pp_cache = p_bank->pp_loaded_cache = NULL;
104 p_bank->b_cache = p_bank->b_cache_dirty = false;
107 /* Everything worked, attach the object */
108 p_module_bank = p_bank;
110 /* Fills the module bank structure with the main module infos.
111 * This is very useful as it will allow us to consider the main
112 * library just as another module, and for instance the configuration
113 * options of main will be available in the module bank structure just
114 * as for every other module. */
115 AllocateBuiltinModule( p_this, vlc_entry__main );
116 vlc_rwlock_init (&config_lock);
117 config_SortConfig ();
120 p_module_bank->i_usage++;
122 /* We do retain the module bank lock until the plugins are loaded as well.
123 * This is ugly, this staged loading approach is needed: LibVLC gets
124 * some configuration parameters relevant to loading the plugins from
125 * the main (builtin) module. The module bank becomes shared read-only data
126 * once it is ready, so we need to fully serialize initialization.
127 * DO NOT UNCOMMENT the following line unless you managed to squeeze
128 * module_LoadPlugins() before you unlock the mutex. */
129 /*vlc_mutex_unlock( &module_lock );*/
132 #undef module_EndBank
134 * Unloads all unused plugin modules and empties the module
135 * bank in case of success.
136 * \param p_this vlc object structure
139 void module_EndBank( vlc_object_t *p_this, bool b_plugins )
141 module_bank_t *p_bank = p_module_bank;
143 assert (p_bank != NULL);
145 /* Save the configuration */
146 if( !var_InheritBool( p_this, "ignore-config" ) )
147 config_AutoSaveConfigFile( p_this );
149 /* If plugins were _not_ loaded, then the caller still has the bank lock
150 * from module_InitBank(). */
152 vlc_mutex_lock( &module_lock );
154 vlc_assert_locked( &module_lock ); not for static mutexes :( */
156 if( --p_bank->i_usage > 0 )
158 vlc_mutex_unlock( &module_lock );
162 config_UnsortConfig ();
163 vlc_rwlock_destroy (&config_lock);
164 p_module_bank = NULL;
165 vlc_mutex_unlock( &module_lock );
167 #ifdef HAVE_DYNAMIC_PLUGINS
168 while( p_bank->i_loaded_cache-- )
170 if( p_bank->pp_loaded_cache[p_bank->i_loaded_cache] )
172 DeleteModule( p_bank,
173 p_bank->pp_loaded_cache[p_bank->i_loaded_cache]->p_module );
174 free( p_bank->pp_loaded_cache[p_bank->i_loaded_cache]->psz_file );
175 free( p_bank->pp_loaded_cache[p_bank->i_loaded_cache] );
178 free( p_bank->pp_loaded_cache );
179 while( p_bank->i_cache-- )
181 free( p_bank->pp_cache[p_bank->i_cache]->psz_file );
182 free( p_bank->pp_cache[p_bank->i_cache] );
184 free( p_bank->pp_cache );
187 while( p_bank->head != NULL )
188 DeleteModule( p_bank, p_bank->head );
193 #undef module_LoadPlugins
195 * Loads module descriptions for all available plugins.
196 * Fills the module bank structure with the plugin modules.
198 * \param p_this vlc object structure
201 void module_LoadPlugins( vlc_object_t * p_this, const void **builtins )
203 module_bank_t *p_bank = p_module_bank;
206 /*vlc_assert_locked( &module_lock ); not for static mutexes :( */
210 for (int i = 0; builtins[i]; i++)
211 AllocateBuiltinModule( p_this, builtins[i] );
214 #ifdef HAVE_DYNAMIC_PLUGINS
215 if( p_bank->i_usage == 1 )
217 msg_Dbg( p_this, "checking plugin modules" );
218 p_module_bank->b_cache = var_InheritBool( p_this, "plugins-cache" );
220 AllocateAllPlugins( p_this, p_module_bank );
221 config_UnsortConfig ();
222 config_SortConfig ();
225 vlc_mutex_unlock( &module_lock );
229 * Checks whether a module implements a capability.
231 * \param m the module
232 * \param cap the capability to check
233 * \return TRUE if the module have the capability
235 bool module_provides( const module_t *m, const char *cap )
237 return !strcmp( m->psz_capability, cap );
241 * Get the internal name of a module
243 * \param m the module
244 * \return the module name
246 const char *module_get_object( const module_t *m )
248 return m->psz_object_name;
252 * Get the human-friendly name of a module.
254 * \param m the module
255 * \param long_name TRUE to have the long name of the module
256 * \return the short or long name of the module
258 const char *module_get_name( const module_t *m, bool long_name )
260 if( long_name && ( m->psz_longname != NULL) )
261 return m->psz_longname;
263 return m->psz_shortname ? m->psz_shortname : m->psz_object_name;
267 * Get the help for a module
269 * \param m the module
272 const char *module_get_help( const module_t *m )
278 * Get the capability for a module
280 * \param m the module
281 * return the capability
283 const char *module_get_capability( const module_t *m )
285 return m->psz_capability;
289 * Get the score for a module
291 * \param m the module
292 * return the score for the capability
294 int module_get_score( const module_t *m )
300 * Translate a string using the module's text domain
302 * \param m the module
303 * \param str the American English ASCII string to localize
304 * \return the gettext-translated string
306 const char *module_gettext (const module_t *m, const char *str)
309 const char *domain = m->domain ? m->domain : PACKAGE_NAME;
310 if (unlikely(str == NULL || *str == '\0'))
312 return dgettext (domain, str);
319 module_t *module_hold (module_t *m)
321 vlc_hold (&m->vlc_gc_data);
325 void module_release (module_t *m)
327 vlc_release (&m->vlc_gc_data);
331 int module_start (vlc_object_t *obj, module_t *m)
333 return m->pf_activate ? (m->pf_activate (obj)) : VLC_SUCCESS;
337 void module_stop (vlc_object_t *obj, module_t *m)
339 if (m->pf_deactivate)
340 m->pf_deactivate (obj);
344 * Frees the flat list of VLC modules.
345 * @param list list obtained by module_list_get()
346 * @param length number of items on the list
349 void module_list_free (module_t **list)
354 for (size_t i = 0; list[i] != NULL; i++)
355 module_release (list[i]);
360 * Gets the flat list of VLC modules.
361 * @param n [OUT] pointer to the number of modules or NULL
362 * @return NULL-terminated table of module pointers
363 * (release with module_list_free()), or NULL in case of error.
365 module_t **module_list_get (size_t *n)
367 /* TODO: this whole module lookup is quite inefficient */
368 /* Remove this and improve module_need */
369 module_t **tab = NULL;
372 assert (p_module_bank);
373 for (module_t *mod = p_module_bank->head; mod; mod = mod->next)
376 nt = realloc (tab, (i + 2 + mod->submodule_count) * sizeof (*tab));
379 module_list_free (tab);
384 tab[i++] = module_hold (mod);
385 for (module_t *subm = mod->submodule; subm; subm = subm->next)
386 tab[i++] = module_hold (subm);
394 typedef struct module_list_t
401 static int modulecmp (const void *a, const void *b)
403 const module_list_t *la = a, *lb = b;
404 /* Note that qsort() uses _ascending_ order,
405 * so the smallest module is the one with the biggest score. */
406 return lb->i_score - la->i_score;
413 * Return the best module function, given a capability list.
415 * \param p_this the vlc object
416 * \param psz_capability list of capabilities needed
417 * \param psz_name name of the module asked
418 * \param b_strict if true, do not fallback to plugin with a different name
419 * but the same capability
420 * \return the module or NULL in case of a failure
422 module_t * module_need( vlc_object_t *p_this, const char *psz_capability,
423 const char *psz_name, bool b_strict )
425 stats_TimerStart( p_this, "module_need()", STATS_TIMER_MODULE_NEED );
427 module_list_t *p_list;
430 char *psz_shortcuts = NULL, *psz_var = NULL, *psz_alias = NULL;
431 bool b_force_backup = p_this->b_force;
433 /* Deal with variables */
434 if( psz_name && psz_name[0] == '$' )
436 psz_name = psz_var = var_CreateGetString( p_this, psz_name + 1 );
439 /* Count how many different shortcuts were asked for */
440 if( psz_name && *psz_name )
442 char *psz_parser, *psz_last_shortcut;
444 /* If the user wants none, give him none. */
445 if( !strcmp( psz_name, "none" ) )
448 stats_TimerStop( p_this, STATS_TIMER_MODULE_NEED );
449 stats_TimerDump( p_this, STATS_TIMER_MODULE_NEED );
450 stats_TimerClean( p_this, STATS_TIMER_MODULE_NEED );
455 psz_parser = psz_shortcuts = psz_last_shortcut = strdup( psz_name );
457 while( ( psz_parser = strchr( psz_parser, ',' ) ) )
461 psz_last_shortcut = ++psz_parser;
464 /* Check if the user wants to override the "strict" mode */
465 if( psz_last_shortcut )
467 if( !strcmp(psz_last_shortcut, "none") )
472 else if( !strcmp(psz_last_shortcut, "any") )
480 /* Sort the modules and test them */
482 module_t **p_all = module_list_get (&count);
483 p_list = malloc( count * sizeof( module_list_t ) );
485 /* Parse the module list for capabilities and probe each of them */
487 for (size_t i = 0; (p_module = p_all[i]) != NULL; i++)
489 int i_shortcut_bonus = 0;
491 /* Test that this module can do what we need */
492 if( !module_provides( p_module, psz_capability ) )
495 /* If we required a shortcut, check this plugin provides it. */
496 if( i_shortcuts > 0 )
498 const char *name = psz_shortcuts;
500 for( unsigned i_short = i_shortcuts; i_short > 0; i_short-- )
502 for( unsigned i = 0; i < p_module->i_shortcuts; i++ )
505 if( ( c = strchr( name, '@' ) )
506 ? !strncasecmp( name, p_module->pp_shortcuts[i],
508 : !strcasecmp( name, p_module->pp_shortcuts[i] ) )
513 i_shortcut_bonus = i_short * 10000;
518 /* Go to the next shortcut... This is so lame! */
519 name += strlen( name ) + 1;
522 /* If we are in "strict" mode and we couldn't
523 * find the module in the list of provided shortcuts,
524 * then kick the bastard out of here!!! */
529 /* Trash <= 0 scored plugins (they can only be selected by shortcut) */
530 if( p_module->i_score <= 0 )
534 /* Store this new module */
535 p_list[count].p_module = module_hold (p_module);
536 p_list[count].i_score = p_module->i_score + i_shortcut_bonus;
537 p_list[count].b_force = i_shortcut_bonus && b_strict;
541 /* We can release the list, interesting modules are held */
542 module_list_free (p_all);
544 /* Sort candidates by descending score */
545 qsort (p_list, count, sizeof (p_list[0]), modulecmp);
546 msg_Dbg( p_this, "looking for %s module: %zu candidate%s", psz_capability,
547 count, count == 1 ? "" : "s" );
549 /* Parse the linked list and use the first successful module */
551 for (size_t i = 0; (i < count) && (p_module == NULL); i++)
553 module_t *p_cand = p_list[i].p_module;
554 #ifdef HAVE_DYNAMIC_PLUGINS
555 /* Make sure the module is loaded in mem */
556 module_t *p_real = p_cand->b_submodule ? p_cand->parent : p_cand;
558 if( !p_real->b_builtin && !p_real->b_loaded )
560 module_t *p_new_module =
561 AllocatePlugin( p_this, p_real->psz_filename );
562 if( p_new_module == NULL )
563 { /* Corrupted module */
564 msg_Err( p_this, "possibly corrupt module cache" );
565 module_release( p_cand );
568 CacheMerge( p_this, p_real, p_new_module );
569 DeleteModule( p_module_bank, p_new_module );
573 p_this->b_force = p_list[i].b_force;
575 switch( module_start( p_this, p_cand ) )
583 /* good module, but aborted */
584 module_release( p_cand );
587 default: /* bad module */
588 module_release( p_cand );
592 /* Release the remaining modules */
594 module_release (p_list[i].p_module);
598 p_this->b_force = b_force_backup;
600 if( p_module != NULL )
602 msg_Dbg( p_this, "using %s module \"%s\"",
603 psz_capability, p_module->psz_object_name );
604 vlc_object_set_name( p_this, psz_alias ? psz_alias
605 : p_module->psz_object_name );
607 else if( count == 0 )
608 msg_Dbg( p_this, "no %s module matched \"%s\"",
609 psz_capability, (psz_name && *psz_name) ? psz_name : "any" );
611 msg_Dbg( p_this, "no %s module matching \"%s\" could be loaded",
612 psz_capability, (psz_name && *psz_name) ? psz_name : "any" );
614 free( psz_shortcuts );
617 stats_TimerStop( p_this, STATS_TIMER_MODULE_NEED );
618 stats_TimerDump( p_this, STATS_TIMER_MODULE_NEED );
619 stats_TimerClean( p_this, STATS_TIMER_MODULE_NEED );
621 /* Don't forget that the module is still locked */
629 * This function must be called by the thread that called module_need, to
630 * decrease the reference count and allow for hiding of modules.
631 * \param p_this vlc object structure
632 * \param p_module the module structure
635 void module_unneed( vlc_object_t * p_this, module_t * p_module )
637 msg_Dbg( p_this, "removing module \"%s\"", p_module->psz_object_name );
638 module_stop( p_this, p_module );
639 module_release( p_module );
643 * Get a pointer to a module_t given it's name.
645 * \param psz_name the name of the module
646 * \return a pointer to the module or NULL in case of a failure
648 module_t *module_find( const char * psz_name )
650 module_t **list, *module;
652 list = module_list_get (NULL);
656 for (size_t i = 0; (module = list[i]) != NULL; i++)
658 const char *psz_module_name = module->psz_object_name;
660 if( psz_module_name && !strcmp( psz_module_name, psz_name ) )
662 module_hold (module);
666 module_list_free (list);
671 * Tell if a module exists and release it in thic case
673 * \param psz_name th name of the module
674 * \return TRUE if the module exists
676 bool module_exists (const char * psz_name)
678 module_t *p_module = module_find (psz_name);
680 module_release (p_module);
681 return p_module != NULL;
685 * Get a pointer to a module_t that matches a shortcut.
686 * This is a temporary hack for SD. Do not re-use (generally multiple modules
687 * can have the same shortcut, so this is *broken* - use module_need()!).
689 * \param psz_shortcut shortcut of the module
690 * \param psz_cap capability of the module
691 * \return a pointer to the module or NULL in case of a failure
693 module_t *module_find_by_shortcut (const char *psz_shortcut)
695 module_t **list, *module;
697 list = module_list_get (NULL);
701 for (size_t i = 0; (module = list[i]) != NULL; i++)
703 for (size_t j = 0; j < module->i_shortcuts; j++)
705 if (!strcmp (module->pp_shortcuts[j], psz_shortcut))
707 module_hold (module);
713 module_list_free (list);
718 * Get the configuration of a module
720 * \param module the module
721 * \param psize the size of the configuration returned
722 * \return the configuration as an array
724 module_config_t *module_config_get( const module_t *module, unsigned *restrict psize )
727 unsigned size = module->confsize;
728 module_config_t *config = malloc( size * sizeof( *config ) );
730 assert( psize != NULL );
736 for( i = 0, j = 0; i < size; i++ )
738 const module_config_t *item = module->p_config + i;
739 if( item->b_internal /* internal option */
740 || item->b_removed /* removed option */ )
743 memcpy( config + j, item, sizeof( *config ) );
752 * Release the configuration
754 * \param the configuration
757 void module_config_free( module_config_t *config )
762 /*****************************************************************************
763 * Following functions are local.
764 *****************************************************************************/
766 /*****************************************************************************
767 * copy_next_paths_token: from a PATH_SEP_CHAR (a ':' or a ';') separated paths
769 *****************************************************************************/
770 static char * copy_next_paths_token( char * paths, char ** remaining_paths )
774 bool escaped = false;
778 /* Alloc a buffer to store the path */
779 path = malloc( strlen( paths ) + 1 );
780 if( !path ) return NULL;
782 /* Look for PATH_SEP_CHAR (a ':' or a ';') */
783 for( i = 0, done = 0 ; paths[i]; i++ )
785 /* Take care of \\ and \: or \; escapement */
789 path[done++] = paths[i];
792 else if( paths[i] == '/' )
795 else if( paths[i] == '\\' )
798 else if( paths[i] == PATH_SEP_CHAR )
801 path[done++] = paths[i];
805 /* Return the remaining paths */
806 if( remaining_paths ) {
807 *remaining_paths = paths[i] ? &paths[i]+1 : NULL;
813 char *psz_vlcpath = NULL;
815 /*****************************************************************************
816 * AllocateAllPlugins: load all plugin modules we can find.
817 *****************************************************************************/
818 #ifdef HAVE_DYNAMIC_PLUGINS
819 static void AllocateAllPlugins( vlc_object_t *p_this, module_bank_t *p_bank )
821 const char *vlcpath = psz_vlcpath;
824 vlc_array_t *arraypaths = vlc_array_new();
825 const bool b_reset = var_InheritBool( p_this, "reset-plugins-cache" );
827 /* Contruct the special search path for system that have a relocatable
828 * executable. Set it to <vlc path>/plugins. */
831 if( asprintf( &path, "%s" DIR_SEP "plugins", vlcpath ) != -1 )
832 vlc_array_append( arraypaths, path );
834 /* If the user provided a plugin path, we add it to the list */
835 char *userpaths = var_InheritString( p_this, "plugin-path" );
838 for( paths_iter = userpaths; paths_iter; )
840 path = copy_next_paths_token( paths_iter, &paths_iter );
842 vlc_array_append( arraypaths, path );
845 count = vlc_array_count( arraypaths );
846 for( i = 0 ; i < count ; i++ )
848 path = vlc_array_item_at_index( arraypaths, i );
852 size_t offset = p_module_bank->i_cache;
854 CacheDelete( p_this, path );
856 CacheLoad( p_this, p_module_bank, path );
858 msg_Dbg( p_this, "recursively browsing `%s'", path );
860 /* Don't go deeper than 5 subdirectories */
861 AllocatePluginDir( p_this, p_bank, path, 5 );
864 CacheSave( p_this, path, p_module_bank->pp_cache + offset,
865 p_module_bank->i_cache - offset );
869 vlc_array_destroy( arraypaths );
873 /*****************************************************************************
874 * AllocatePluginDir: recursively parse a directory to look for plugins
875 *****************************************************************************/
876 static void AllocatePluginDir( vlc_object_t *p_this, module_bank_t *p_bank,
877 const char *psz_dir, unsigned i_maxdepth )
879 if( i_maxdepth == 0 )
882 DIR *dh = vlc_opendir (psz_dir);
886 /* Parse the directory and try to load all files it contains. */
889 char *file = vlc_readdir (dh), *path;
896 if (!strcmp (file, ".") || !strcmp (file, "..")
897 /* Skip directories for unsupported optimizations */
898 || !vlc_CPU_CheckPluginDir (file))
904 const int pathlen = asprintf (&path, "%s"DIR_SEP"%s", psz_dir, file);
906 if (pathlen == -1 || vlc_stat (path, &st))
909 if (S_ISDIR (st.st_mode))
910 /* Recurse into another directory */
911 AllocatePluginDir (p_this, p_bank, path, i_maxdepth - 1);
913 if (S_ISREG (st.st_mode)
914 && strncmp (path, "lib", 3)
915 && ((size_t)pathlen >= sizeof ("_plugin"LIBEXT))
916 && !strncasecmp (path + pathlen - strlen ("_plugin"LIBEXT),
917 "_plugin"LIBEXT, strlen ("_plugni"LIBEXT)))
918 /* ^^ We only load files matching "lib*_plugin"LIBEXT */
919 AllocatePluginFile (p_this, p_bank, path, st.st_mtime, st.st_size);
926 /*****************************************************************************
927 * AllocatePluginFile: load a module into memory and initialize it.
928 *****************************************************************************
929 * This function loads a dynamically loadable module and allocates a structure
930 * for its information data. The module can then be handled by module_need
931 * and module_unneed. It can be removed by DeleteModule.
932 *****************************************************************************/
933 static int AllocatePluginFile( vlc_object_t * p_this, module_bank_t *p_bank,
934 const char *psz_file,
935 int64_t i_file_time, int64_t i_file_size )
937 module_t * p_module = NULL;
938 module_cache_t *p_cache_entry = NULL;
941 * Check our plugins cache first then load plugin if needed
943 p_cache_entry = CacheFind( p_bank, psz_file, i_file_time, i_file_size );
946 p_module = AllocatePlugin( p_this, psz_file );
950 module_config_t *p_item = NULL, *p_end = NULL;
952 p_module = p_cache_entry->p_module;
953 p_module->b_loaded = false;
955 /* If plugin-path contains duplicate entries... */
956 if( p_module->next != NULL )
957 return 0; /* already taken care of that one */
959 /* For now we force loading if the module's config contains
960 * callbacks or actions.
961 * Could be optimized by adding an API call.*/
962 for( p_item = p_module->p_config, p_end = p_item + p_module->confsize;
963 p_item < p_end; p_item++ )
965 if( p_item->i_action )
967 p_module = AllocatePlugin( p_this, psz_file );
973 if( p_module == NULL )
976 /* We have not already scanned and inserted this module */
977 assert( p_module->next == NULL );
979 /* Everything worked fine !
980 * The module is ready to be added to the list. */
981 p_module->b_builtin = false;
983 /* msg_Dbg( p_this, "plugin \"%s\", %s",
984 p_module->psz_object_name, p_module->psz_longname ); */
985 p_module->next = p_bank->head;
986 p_bank->head = p_module;
987 assert( p_module->next != NULL ); /* Insertion done */
989 if( !p_module_bank->b_cache )
992 /* Add entry to cache */
993 module_cache_t **pp_cache = p_bank->pp_cache;
995 pp_cache = realloc_or_free( pp_cache, (p_bank->i_cache + 1) * sizeof(void *) );
996 if( pp_cache == NULL )
998 pp_cache[p_bank->i_cache] = malloc( sizeof(module_cache_t) );
999 if( pp_cache[p_bank->i_cache] == NULL )
1001 pp_cache[p_bank->i_cache]->psz_file = strdup( psz_file );
1002 pp_cache[p_bank->i_cache]->i_time = i_file_time;
1003 pp_cache[p_bank->i_cache]->i_size = i_file_size;
1004 pp_cache[p_bank->i_cache]->p_module = p_module;
1005 p_bank->pp_cache = pp_cache;
1010 /*****************************************************************************
1011 * AllocatePlugin: load a module into memory and initialize it.
1012 *****************************************************************************
1013 * This function loads a dynamically loadable module and allocates a structure
1014 * for its information data. The module can then be handled by module_need
1015 * and module_unneed. It can be removed by DeleteModule.
1016 *****************************************************************************/
1017 static module_t * AllocatePlugin( vlc_object_t * p_this, const char *psz_file )
1019 module_t * p_module = NULL;
1020 module_handle_t handle;
1022 if( module_Load( p_this, psz_file, &handle ) )
1025 /* Now that we have successfully loaded the module, we can
1026 * allocate a structure for it */
1027 p_module = vlc_module_create( p_this );
1028 if( p_module == NULL )
1030 module_Unload( handle );
1034 p_module->psz_filename = strdup( psz_file );
1035 p_module->handle = handle;
1036 p_module->b_loaded = true;
1038 /* Initialize the module: fill p_module, default config */
1039 if( module_Call( p_this, p_module ) != 0 )
1041 /* We couldn't call module_init() */
1042 free( p_module->psz_filename );
1043 module_release( p_module );
1044 module_Unload( handle );
1048 DupModule( p_module );
1050 /* Everything worked fine ! The module is ready to be added to the list. */
1051 p_module->b_builtin = false;
1056 /*****************************************************************************
1057 * DupModule: make a plugin module standalone.
1058 *****************************************************************************
1059 * This function duplicates all strings in the module, so that the dynamic
1060 * object can be unloaded. It acts recursively on submodules.
1061 *****************************************************************************/
1062 static void DupModule( module_t *p_module )
1064 char **pp_shortcuts = p_module->pp_shortcuts;
1065 for( unsigned i = 0; i < p_module->i_shortcuts; i++ )
1066 pp_shortcuts[i] = strdup( p_module->pp_shortcuts[i] );
1068 /* We strdup() these entries so that they are still valid when the
1069 * module is unloaded. */
1070 p_module->psz_capability = strdup( p_module->psz_capability );
1071 p_module->psz_shortname = p_module->psz_shortname ?
1072 strdup( p_module->psz_shortname ) : NULL;
1073 p_module->psz_longname = strdup( p_module->psz_longname );
1074 p_module->psz_help = p_module->psz_help ? strdup( p_module->psz_help )
1076 p_module->domain = p_module->domain ? strdup( p_module->domain ) : NULL;
1078 for (module_t *subm = p_module->submodule; subm; subm = subm->next)
1082 /*****************************************************************************
1083 * UndupModule: free a duplicated module.
1084 *****************************************************************************
1085 * This function frees the allocations done in DupModule().
1086 *****************************************************************************/
1087 static void UndupModule( module_t *p_module )
1089 char **pp_shortcuts = p_module->pp_shortcuts;
1091 for (module_t *subm = p_module->submodule; subm; subm = subm->next)
1094 for( unsigned i = 0; i < p_module->i_shortcuts; i++ )
1095 free( pp_shortcuts[i] );
1097 free( p_module->psz_capability );
1098 FREENULL( p_module->psz_shortname );
1099 free( p_module->psz_longname );
1100 FREENULL( p_module->psz_help );
1101 free( p_module->domain );
1104 #endif /* HAVE_DYNAMIC_PLUGINS */
1106 /*****************************************************************************
1107 * AllocateBuiltinModule: initialize a builtin module.
1108 *****************************************************************************
1109 * This function registers a builtin module and allocates a structure
1110 * for its information data. The module can then be handled by module_need
1111 * and module_unneed. It can be removed by DeleteModule.
1112 *****************************************************************************/
1113 static int AllocateBuiltinModule( vlc_object_t * p_this,
1114 int ( *pf_entry ) ( module_t * ) )
1116 module_t * p_module;
1118 /* Now that we have successfully loaded the module, we can
1119 * allocate a structure for it */
1120 p_module = vlc_module_create( p_this );
1121 if( p_module == NULL )
1124 /* Initialize the module : fill p_module->psz_object_name, etc. */
1125 if( pf_entry( p_module ) != 0 )
1127 /* With a well-written module we shouldn't have to print an
1128 * additional error message here, but just make sure. */
1129 msg_Err( p_this, "failed calling entry point in builtin module" );
1130 module_release( p_module );
1134 /* Everything worked fine ! The module is ready to be added to the list. */
1135 p_module->b_builtin = true;
1137 p_module->next = p_module_bank->head;
1138 p_module_bank->head = p_module;
1141 /* msg_Dbg( p_this, "builtin \"%s\", %s",
1142 p_module->psz_object_name, p_module->psz_longname ); */
1147 /*****************************************************************************
1148 * DeleteModule: delete a module and its structure.
1149 *****************************************************************************
1150 * This function can only be called if the module isn't being used.
1151 *****************************************************************************/
1152 static void DeleteModule( module_bank_t *p_bank, module_t * p_module )
1156 /* Unlist the module (if it is in the list) */
1157 module_t **pp_self = &p_bank->head;
1158 while (*pp_self != NULL && *pp_self != p_module)
1159 pp_self = &((*pp_self)->next);
1161 *pp_self = p_module->next;
1163 /* We free the structures that we strdup()ed in Allocate*Module(). */
1164 #ifdef HAVE_DYNAMIC_PLUGINS
1165 if( !p_module->b_builtin )
1167 if( p_module->b_loaded && p_module->b_unloadable )
1169 module_Unload( p_module->handle );
1171 UndupModule( p_module );
1172 free( p_module->psz_filename );
1176 /* Free and detach the object's children */
1177 while (p_module->submodule)
1179 module_t *submodule = p_module->submodule;
1180 p_module->submodule = submodule->next;
1181 module_release (submodule);
1184 config_Free( p_module );
1185 module_release( p_module );