1 /*****************************************************************************
2 * objects.c: vlc_object_t handling
3 *****************************************************************************
4 * Copyright (C) 2004-2008 the VideoLAN team
6 * Authors: Samuel Hocevar <sam@zoy.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
21 *****************************************************************************/
25 * This file contains the functions to handle the vlc_object_t type
27 * Unless otherwise stated, functions in this file are not cancellation point.
28 * All functions in this file are safe w.r.t. deferred cancellation.
32 /*****************************************************************************
34 *****************************************************************************/
39 #include <vlc_common.h>
41 #include "../libvlc.h"
43 #include "audio_output/aout_internal.h"
45 #include "vlc_interface.h"
46 #include "vlc_codec.h"
48 #include "variables.h"
54 # include <errno.h> /* ENOSYS */
60 #if defined (HAVE_SYS_EVENTFD_H)
61 # include <sys/eventfd.h>
65 /*****************************************************************************
67 *****************************************************************************/
68 static int DumpCommand( vlc_object_t *, char const *,
69 vlc_value_t, vlc_value_t, void * );
71 static vlc_object_t * FindObject ( vlc_object_t *, int, int );
72 static vlc_object_t * FindObjectName( vlc_object_t *, const char *, int );
73 static void PrintObject ( vlc_object_t *, const char * );
74 static void DumpStructure ( vlc_object_t *, int, char * );
76 static vlc_list_t * NewList ( int );
77 static void ListReplace ( vlc_list_t *, vlc_object_t *, int );
78 /*static void ListAppend ( vlc_list_t *, vlc_object_t * );*/
79 static int CountChildren ( vlc_object_t *, int );
80 static void ListChildren ( vlc_list_t *, vlc_object_t *, int );
82 static void vlc_object_destroy( vlc_object_t *p_this );
83 static void vlc_object_detach_unlocked (vlc_object_t *p_this);
85 static void vlc_object_dump( vlc_object_t *p_this );
88 /*****************************************************************************
89 * Local structure lock
90 *****************************************************************************/
91 static void libvlc_lock (libvlc_int_t *p_libvlc)
93 vlc_mutex_lock (&(libvlc_priv (p_libvlc)->structure_lock));
96 static void libvlc_unlock (libvlc_int_t *p_libvlc)
98 vlc_mutex_unlock (&(libvlc_priv (p_libvlc)->structure_lock));
101 void *__vlc_custom_create( vlc_object_t *p_this, size_t i_size,
102 int i_type, const char *psz_type )
105 vlc_object_internals_t *p_priv;
108 * VLC objects are laid out as follow:
109 * - first the LibVLC-private per-object data,
110 * - then VLC_COMMON members from vlc_object_t,
111 * - finally, the type-specific data (if any).
113 * This function initializes the LibVLC and common data,
114 * and zeroes the rest.
116 p_priv = calloc( 1, sizeof( *p_priv ) + i_size );
120 assert (i_size >= sizeof (vlc_object_t));
121 p_new = (vlc_object_t *)(p_priv + 1);
123 p_priv->i_object_type = i_type;
124 p_new->psz_object_type = psz_type;
125 p_priv->psz_name = NULL;
127 p_new->b_die = false;
128 p_new->b_error = false;
129 p_new->b_force = false;
131 p_new->psz_header = NULL;
134 p_new->i_flags = p_this->i_flags
135 & (OBJECT_FLAGS_NODBG|OBJECT_FLAGS_QUIET|OBJECT_FLAGS_NOINTERACT);
137 p_priv->p_vars = calloc( 16, sizeof( variable_t ) );
139 if( !p_priv->p_vars )
147 libvlc_int_t *self = (libvlc_int_t*)p_new;
148 p_new->p_libvlc = self;
149 vlc_mutex_init (&(libvlc_priv (self)->structure_lock));
153 p_new->p_libvlc = p_this->p_libvlc;
155 vlc_spin_init( &p_priv->ref_spin );
156 p_priv->i_refcount = 1;
157 p_priv->pf_destructor = NULL;
158 p_priv->b_thread = false;
159 p_new->p_parent = NULL;
160 p_priv->pp_children = NULL;
161 p_priv->i_children = 0;
163 /* Initialize mutexes and condvars */
164 vlc_mutex_init( &p_priv->var_lock );
165 vlc_cond_init( &p_priv->var_wait );
166 p_priv->pipes[0] = p_priv->pipes[1] = -1;
168 if (p_new == VLC_OBJECT(p_new->p_libvlc))
169 { /* TODO: should be in src/libvlc.c */
170 int canc = vlc_savecancel ();
171 var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
172 var_AddCallback( p_new, "tree", DumpCommand, NULL );
173 var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
174 var_AddCallback( p_new, "vars", DumpCommand, NULL );
175 vlc_restorecancel (canc);
183 * Allocates and initializes a vlc object.
185 * @param i_type known object type (all of them are negative integer values),
186 * or object byte size (always positive).
188 * @return the new object, or NULL on error.
190 void * __vlc_object_create( vlc_object_t *p_this, int i_type )
192 const char * psz_type;
197 case VLC_OBJECT_DECODER:
198 i_size = sizeof(decoder_t);
199 psz_type = "decoder";
201 case VLC_OBJECT_AOUT:
202 i_size = sizeof(aout_instance_t);
203 psz_type = "audio output";
206 assert( i_type > 0 ); /* unknown type?! */
208 i_type = VLC_OBJECT_GENERIC;
209 psz_type = "generic";
213 return vlc_custom_create( p_this, i_size, i_type, psz_type );
218 ****************************************************************************
219 * Set the destructor of a vlc object
221 * This function sets the destructor of the vlc object. It will be called
222 * when the object is destroyed when the its refcount reaches 0.
223 * (It is called by the internal function vlc_object_destroy())
224 *****************************************************************************/
225 void __vlc_object_set_destructor( vlc_object_t *p_this,
226 vlc_destructor_t pf_destructor )
228 vlc_object_internals_t *p_priv = vlc_internals(p_this );
230 vlc_spin_lock( &p_priv->ref_spin );
231 p_priv->pf_destructor = pf_destructor;
232 vlc_spin_unlock( &p_priv->ref_spin );
235 static vlc_mutex_t name_lock = VLC_STATIC_MUTEX;
237 #undef vlc_object_set_name
238 int vlc_object_set_name(vlc_object_t *obj, const char *name)
240 vlc_object_internals_t *priv = vlc_internals(obj);
241 char *newname = name ? strdup (name) : NULL;
244 vlc_mutex_lock (&name_lock);
245 oldname = priv->psz_name;
246 priv->psz_name = newname;
247 vlc_mutex_unlock (&name_lock);
250 return (priv->psz_name || !name) ? VLC_SUCCESS : VLC_ENOMEM;
253 #undef vlc_object_get_name
254 char *vlc_object_get_name(const vlc_object_t *obj)
256 vlc_object_internals_t *priv = vlc_internals(obj);
259 vlc_mutex_lock (&name_lock);
260 name = priv->psz_name ? strdup (priv->psz_name) : NULL;
261 vlc_mutex_unlock (&name_lock);
267 ****************************************************************************
268 * Destroy a vlc object (Internal)
270 * This function destroys an object that has been previously allocated with
271 * vlc_object_create. The object's refcount must be zero and it must not be
272 * attached to other objects in any way.
274 * This function must be called with cancellation disabled (currently).
275 *****************************************************************************/
276 static void vlc_object_destroy( vlc_object_t *p_this )
278 vlc_object_internals_t *p_priv = vlc_internals( p_this );
280 /* Objects are always detached beforehand */
281 assert( !p_this->p_parent );
283 /* Send a kill to the object's thread if applicable */
284 vlc_object_kill( p_this );
286 /* Call the custom "subclass" destructor */
287 if( p_priv->pf_destructor )
288 p_priv->pf_destructor( p_this );
290 /* Any thread must have been cleaned up at this point. */
291 assert( !p_priv->b_thread );
293 /* Destroy the associated variables, starting from the end so that
294 * no memmove calls have to be done. */
295 while( p_priv->i_vars )
297 var_Destroy( p_this, p_priv->p_vars[p_priv->i_vars - 1].psz_name );
300 free( p_priv->p_vars );
301 vlc_cond_destroy( &p_priv->var_wait );
302 vlc_mutex_destroy( &p_priv->var_lock );
304 free( p_this->psz_header );
306 free( p_priv->psz_name );
308 vlc_spin_destroy( &p_priv->ref_spin );
309 if( p_priv->pipes[1] != -1 && p_priv->pipes[1] != p_priv->pipes[0] )
310 close( p_priv->pipes[1] );
311 if( p_priv->pipes[0] != -1 )
312 close( p_priv->pipes[0] );
313 if( VLC_OBJECT(p_this->p_libvlc) == p_this )
314 vlc_mutex_destroy (&(libvlc_priv ((libvlc_int_t *)p_this)->structure_lock));
321 # include <winsock2.h>
322 # include <ws2tcpip.h>
325 * select()-able pipes emulated using Winsock
327 static int pipe (int fd[2])
330 int addrlen = sizeof (addr);
332 SOCKET l = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP), a,
333 c = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
334 if ((l == INVALID_SOCKET) || (c == INVALID_SOCKET))
337 memset (&addr, 0, sizeof (addr));
338 addr.sin_family = AF_INET;
339 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
340 if (bind (l, (PSOCKADDR)&addr, sizeof (addr))
341 || getsockname (l, (PSOCKADDR)&addr, &addrlen)
343 || connect (c, (PSOCKADDR)&addr, addrlen))
346 a = accept (l, NULL, NULL);
347 if (a == INVALID_SOCKET)
358 if (l != INVALID_SOCKET)
360 if (c != INVALID_SOCKET)
366 #define read( a, b, c ) recv (a, b, c, 0)
368 #define write( a, b, c ) send (a, b, c, 0)
370 #define close( a ) closesocket (a)
373 static vlc_mutex_t pipe_lock = VLC_STATIC_MUTEX;
376 * Returns the readable end of a pipe that becomes readable once termination
377 * of the object is requested (vlc_object_kill()).
378 * This can be used to wake-up out of a select() or poll() event loop, such
379 * typically when doing network I/O.
381 * Note that the pipe will remain the same for the lifetime of the object.
382 * DO NOT read the pipe nor close it yourself. Ever.
384 * @param obj object that would be "killed"
385 * @return a readable pipe descriptor, or -1 on error.
387 int vlc_object_waitpipe( vlc_object_t *obj )
389 vlc_object_internals_t *internals = vlc_internals( obj );
391 vlc_mutex_lock (&pipe_lock);
392 if (internals->pipes[0] == -1)
394 /* This can only ever happen if someone killed us without locking: */
395 assert (internals->pipes[1] == -1);
398 internals->pipes[0] = internals->pipes[1] = eventfd (0, 0);
399 if (internals->pipes[0] == -1)
402 if (pipe (internals->pipes))
403 internals->pipes[0] = internals->pipes[1] = -1;
406 if (internals->pipes[0] != -1 && obj->b_die)
407 { /* Race condition: vlc_object_kill() already invoked! */
408 msg_Dbg (obj, "waitpipe: object already dying");
409 write (internals->pipes[1], &(uint64_t){ 1 }, sizeof (uint64_t));
412 vlc_mutex_unlock (&pipe_lock);
413 return internals->pipes[0];
418 * Requests termination of an object, cancels the object thread, and make the
419 * object wait pipe (if it exists) readable. Not a cancellation point.
421 void __vlc_object_kill( vlc_object_t *p_this )
423 vlc_object_internals_t *priv = vlc_internals( p_this );
426 vlc_thread_cancel( p_this );
427 vlc_mutex_lock( &pipe_lock );
431 p_this->b_die = true;
434 /* This also serves as a memory barrier toward vlc_object_alive(): */
435 vlc_mutex_unlock( &pipe_lock );
439 int canc = vlc_savecancel ();
441 /* write _after_ setting b_die, so vlc_object_alive() returns false */
442 write (fd, &(uint64_t){ 1 }, sizeof (uint64_t));
443 msg_Dbg (p_this, "waitpipe: object killed");
444 vlc_restorecancel (canc);
449 /*****************************************************************************
450 * find a typed object and increment its refcount
451 *****************************************************************************
452 * This function recursively looks for a given object type. i_mode can be one
453 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
454 *****************************************************************************/
455 void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
457 vlc_object_t *p_found;
459 /* If we are of the requested type ourselves, don't look further */
460 if( !(i_mode & FIND_STRICT)
461 && vlc_internals (p_this)->i_object_type == i_type )
463 vlc_object_hold( p_this );
467 /* Otherwise, recursively look for the object */
468 if ((i_mode & 0x000f) == FIND_ANYWHERE)
469 return vlc_object_find (p_this->p_libvlc, i_type,
470 (i_mode & ~0x000f)|FIND_CHILD);
472 libvlc_lock (p_this->p_libvlc);
473 p_found = FindObject( p_this, i_type, i_mode );
474 libvlc_unlock (p_this->p_libvlc);
479 static int objnamecmp(const vlc_object_t *obj, const char *name)
481 char *objname = vlc_object_get_name(obj);
485 int ret = strcmp (objname, name);
490 #undef vlc_object_find_name
492 * Finds a named object and increment its reference count.
493 * Beware that objects found in this manner can be "owned" by another thread,
494 * be of _any_ type, and be attached to any module (if any). With such an
495 * object reference, you can set or get object variables, emit log messages,
496 * and read write-once object parameters (psz_object_type, etc).
497 * You CANNOT cast the object to a more specific object type, and you
498 * definitely cannot invoke object type-specific callbacks with this.
500 * @param p_this object to search from
501 * @param psz_name name of the object to search for
502 * @param i_mode search direction: FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
504 * @return a matching object (must be released by the caller),
507 vlc_object_t *vlc_object_find_name( vlc_object_t *p_this,
508 const char *psz_name, int i_mode )
510 vlc_object_t *p_found;
512 /* Reading psz_object_name from a separate inhibits thread-safety.
513 * Use a libvlc address variable instead for that sort of things! */
514 msg_Warn( p_this, "%s(%s) is not safe!", __func__, psz_name );
515 /* If have the requested name ourselves, don't look further */
516 if( !(i_mode & FIND_STRICT) && !objnamecmp(p_this, psz_name) )
518 vlc_object_hold( p_this );
522 libvlc_lock (p_this->p_libvlc);
524 /* Otherwise, recursively look for the object */
525 if( (i_mode & 0x000f) == FIND_ANYWHERE )
527 vlc_object_t *p_root = p_this;
530 while( p_root->p_parent != NULL &&
531 p_root != VLC_OBJECT( p_this->p_libvlc ) )
533 p_root = p_root->p_parent;
536 p_found = FindObjectName( p_root, psz_name,
537 (i_mode & ~0x000f)|FIND_CHILD );
538 if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
540 p_found = FindObjectName( VLC_OBJECT( p_this->p_libvlc ),
541 psz_name, (i_mode & ~0x000f)|FIND_CHILD );
546 p_found = FindObjectName( p_this, psz_name, i_mode );
549 libvlc_unlock (p_this->p_libvlc);
554 * Increment an object reference counter.
556 void * __vlc_object_hold( vlc_object_t *p_this )
558 vlc_object_internals_t *internals = vlc_internals( p_this );
560 vlc_spin_lock( &internals->ref_spin );
561 /* Avoid obvious freed object uses */
562 assert( internals->i_refcount > 0 );
563 /* Increment the counter */
564 internals->i_refcount++;
565 vlc_spin_unlock( &internals->ref_spin );
569 /*****************************************************************************
570 * Decrement an object refcount
571 * And destroy the object if its refcount reach zero.
572 *****************************************************************************/
573 void __vlc_object_release( vlc_object_t *p_this )
575 vlc_object_internals_t *internals = vlc_internals( p_this );
576 vlc_object_t *parent = NULL;
577 bool b_should_destroy;
579 vlc_spin_lock( &internals->ref_spin );
580 assert( internals->i_refcount > 0 );
582 if( internals->i_refcount > 1 )
585 /* There are still other references to the object */
586 internals->i_refcount--;
587 vlc_spin_unlock( &internals->ref_spin );
590 vlc_spin_unlock( &internals->ref_spin );
593 /* Remember that we cannot hold the spin while waiting on the mutex */
594 libvlc_lock (p_this->p_libvlc);
595 /* Take the spin again. Note that another thread may have held the
596 * object in the (very short) mean time. */
597 vlc_spin_lock( &internals->ref_spin );
598 b_should_destroy = --internals->i_refcount == 0;
599 vlc_spin_unlock( &internals->ref_spin );
601 if( b_should_destroy )
603 if (p_this->p_parent)
604 /* Detach from parent to protect against FIND_CHILDREN */
605 vlc_object_detach_unlocked (p_this);
607 /* We have no children */
608 assert (internals->i_children == 0);
610 libvlc_unlock (p_this->p_libvlc);
612 if( b_should_destroy )
616 canc = vlc_savecancel ();
617 vlc_object_destroy( p_this );
618 vlc_restorecancel (canc);
620 vlc_object_release (parent);
625 ****************************************************************************
626 * attach object to a parent object
627 *****************************************************************************
628 * This function sets p_this as a child of p_parent, and p_parent as a parent
629 * of p_this. This link can be undone using vlc_object_detach.
630 *****************************************************************************/
631 void __vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
633 if( !p_this ) return;
635 vlc_object_hold (p_parent);
636 libvlc_lock (p_this->p_libvlc);
638 /* Attach the parent to its child */
639 assert (!p_this->p_parent);
640 p_this->p_parent = p_parent;
642 /* Attach the child to its parent */
643 vlc_object_internals_t *priv = vlc_internals( p_parent );
644 INSERT_ELEM( priv->pp_children, priv->i_children, priv->i_children,
646 libvlc_unlock (p_this->p_libvlc);
650 static void vlc_object_detach_unlocked (vlc_object_t *p_this)
652 if (p_this->p_parent == NULL)
655 vlc_object_internals_t *priv = vlc_internals( p_this->p_parent );
659 /* Remove p_this's parent */
660 p_this->p_parent = NULL;
662 /* Remove all of p_parent's children which are p_this */
663 for( i_index = priv->i_children ; i_index-- ; )
665 if( priv->pp_children[i_index] == p_this )
668 for( i = i_index ; i < priv->i_children ; i++ )
669 priv->pp_children[i] = priv->pp_children[i+1];
673 if( priv->i_children )
675 vlc_object_t **pp_children = (vlc_object_t **)
676 realloc( priv->pp_children,
677 priv->i_children * sizeof(vlc_object_t *) );
679 priv->pp_children = pp_children;
683 /* Special case - don't realloc() to zero to avoid leaking */
684 free( priv->pp_children );
685 priv->pp_children = NULL;
691 ****************************************************************************
692 * detach object from its parent
693 *****************************************************************************
694 * This function removes all links between an object and its parent.
695 *****************************************************************************/
696 void __vlc_object_detach( vlc_object_t *p_this )
698 vlc_object_t *p_parent;
699 if( !p_this ) return;
701 libvlc_lock (p_this->p_libvlc);
702 p_parent = p_this->p_parent;
704 vlc_object_detach_unlocked( p_this );
705 libvlc_unlock (p_this->p_libvlc);
708 vlc_object_release (p_parent);
713 ****************************************************************************
714 * find a list typed objects and increment their refcount
715 *****************************************************************************
716 * This function recursively looks for a given object type. i_mode can be one
717 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
718 *****************************************************************************/
719 vlc_list_t * vlc_list_find( vlc_object_t *p_this, int i_type, int i_mode )
724 /* Look for the objects */
725 switch( i_mode & 0x000f )
728 return vlc_list_find (VLC_OBJECT(p_this->p_libvlc), i_type, FIND_CHILD);
731 libvlc_lock (p_this->p_libvlc);
732 i_count = CountChildren( p_this, i_type );
733 p_list = NewList( i_count );
735 /* Check allocation was successful */
736 if( p_list->i_count != i_count )
738 libvlc_unlock (p_this->p_libvlc);
744 ListChildren( p_list, p_this, i_type );
745 libvlc_unlock (p_this->p_libvlc);
749 msg_Err( p_this, "unimplemented!" );
750 p_list = NewList( 0 );
758 * Gets the list of children of an objects, and increment their reference
760 * @return a list (possibly empty) or NULL in case of error.
762 vlc_list_t *__vlc_list_children( vlc_object_t *obj )
765 vlc_object_internals_t *priv = vlc_internals( obj );
767 libvlc_lock (obj->p_libvlc);
768 l = NewList( priv->i_children );
769 for (int i = 0; i < l->i_count; i++)
771 vlc_object_hold( priv->pp_children[i] );
772 l->p_values[i].p_object = priv->pp_children[i];
774 libvlc_unlock (obj->p_libvlc);
778 /*****************************************************************************
779 * DumpCommand: print the current vlc structure
780 *****************************************************************************
781 * This function prints either an ASCII tree showing the connections between
782 * vlc objects, and additional information such as their refcount, thread ID,
783 * etc. (command "tree"), or the same data as a simple list (command "list").
784 *****************************************************************************/
785 static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
786 vlc_value_t oldval, vlc_value_t newval, void *p_data )
788 (void)oldval; (void)p_data;
789 vlc_object_t *p_object = NULL;
791 if( *newval.psz_string )
793 /* try using the object's name to find it */
794 p_object = vlc_object_find_name( p_this, newval.psz_string,
802 libvlc_lock (p_this->p_libvlc);
803 if( *psz_cmd == 't' )
805 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
808 p_object = VLC_OBJECT(p_this->p_libvlc);
811 DumpStructure( p_object, 0, psz_foo );
813 else if( *psz_cmd == 'v' )
818 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
820 PrintObject( p_object, "" );
822 if( !vlc_internals( p_object )->i_vars )
823 printf( " `-o No variables\n" );
824 for( i = 0; i < vlc_internals( p_object )->i_vars; i++ )
826 variable_t *p_var = vlc_internals( p_object )->p_vars + i;
827 const char *psz_type = "unknown";
829 switch( p_var->i_type & VLC_VAR_TYPE )
831 #define MYCASE( type, nice ) \
832 case VLC_VAR_ ## type: \
835 MYCASE( VOID, "void" );
836 MYCASE( BOOL, "bool" );
837 MYCASE( INTEGER, "integer" );
838 MYCASE( HOTKEY, "hotkey" );
839 MYCASE( STRING, "string" );
840 MYCASE( MODULE, "module" );
841 MYCASE( FILE, "file" );
842 MYCASE( DIRECTORY, "directory" );
843 MYCASE( VARIABLE, "variable" );
844 MYCASE( FLOAT, "float" );
845 MYCASE( TIME, "time" );
846 MYCASE( ADDRESS, "address" );
847 MYCASE( MUTEX, "mutex" );
848 MYCASE( LIST, "list" );
851 printf( " %c-o \"%s\" (%s",
852 i + 1 == vlc_internals( p_object )->i_vars ? '`' : '|',
853 p_var->psz_name, psz_type );
854 if( p_var->psz_text )
855 printf( ", %s", p_var->psz_text );
857 if( p_var->i_type & VLC_VAR_HASCHOICE )
858 printf( ", has choices" );
859 if( p_var->i_type & VLC_VAR_ISCOMMAND )
860 printf( ", command" );
861 if( p_var->i_entries )
862 printf( ", %d callbacks", p_var->i_entries );
863 switch( p_var->i_type & VLC_VAR_CLASS )
869 printf( ": %s", p_var->val.b_bool ? "true" : "false" );
871 case VLC_VAR_INTEGER:
872 printf( ": %d", p_var->val.i_int );
875 printf( ": \"%s\"", p_var->val.psz_string );
878 printf( ": %f", p_var->val.f_float );
881 printf( ": %"PRIi64, (int64_t)p_var->val.i_time );
883 case VLC_VAR_ADDRESS:
884 printf( ": %p", p_var->val.p_address );
893 libvlc_unlock (p_this->p_libvlc);
895 if( *newval.psz_string )
897 vlc_object_release( p_object );
902 /*****************************************************************************
903 * vlc_list_release: free a list previously allocated by vlc_list_find
904 *****************************************************************************
905 * This function decreases the refcount of all objects in the list and
907 *****************************************************************************/
908 void vlc_list_release( vlc_list_t *p_list )
912 for( i_index = 0; i_index < p_list->i_count; i_index++ )
914 vlc_object_release( p_list->p_values[i_index].p_object );
917 free( p_list->p_values );
921 /*****************************************************************************
922 * dump an object. (Debug function)
923 *****************************************************************************/
925 static void vlc_object_dump( vlc_object_t *p_this )
927 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
930 DumpStructure( p_this, 0, psz_foo );
934 /* Following functions are local */
936 static vlc_object_t * FindObject( vlc_object_t *p_this, int i_type, int i_mode )
941 switch( i_mode & 0x000f )
944 p_tmp = p_this->p_parent;
947 if( vlc_internals( p_tmp )->i_object_type == i_type )
949 vlc_object_hold( p_tmp );
954 return FindObject( p_tmp, i_type, i_mode );
960 for( i = vlc_internals( p_this )->i_children; i--; )
962 p_tmp = vlc_internals( p_this )->pp_children[i];
963 if( vlc_internals( p_tmp )->i_object_type == i_type )
965 vlc_object_hold( p_tmp );
968 else if( vlc_internals( p_tmp )->i_children )
970 p_tmp = FindObject( p_tmp, i_type, i_mode );
980 /* Handled in vlc_object_find */
987 static vlc_object_t * FindObjectName( vlc_object_t *p_this,
988 const char *psz_name,
994 switch( i_mode & 0x000f )
997 p_tmp = p_this->p_parent;
1000 if( !objnamecmp(p_tmp, psz_name) )
1002 vlc_object_hold( p_tmp );
1007 return FindObjectName( p_tmp, psz_name, i_mode );
1013 for( i = vlc_internals( p_this )->i_children; i--; )
1015 p_tmp = vlc_internals( p_this )->pp_children[i];
1016 if( !objnamecmp(p_tmp, psz_name ) )
1018 vlc_object_hold( p_tmp );
1021 else if( vlc_internals( p_tmp )->i_children )
1023 p_tmp = FindObjectName( p_tmp, psz_name, i_mode );
1033 /* Handled in vlc_object_find */
1041 static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
1043 char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
1046 int canc = vlc_savecancel ();
1047 memset( &psz_name, 0, sizeof(psz_name) );
1048 char *name = vlc_object_get_name(p_this);
1051 snprintf( psz_name, 49, " \"%s\"", name );
1054 psz_name[48] = '\"';
1057 psz_children[0] = '\0';
1058 switch( vlc_internals( p_this )->i_children )
1063 strcpy( psz_children, ", 1 child" );
1066 snprintf( psz_children, 19, ", %i children",
1067 vlc_internals( p_this )->i_children );
1071 psz_refcount[0] = '\0';
1072 if( vlc_internals( p_this )->i_refcount > 0 )
1073 snprintf( psz_refcount, 19, ", refcount %u",
1074 vlc_internals( p_this )->i_refcount );
1076 psz_thread[0] = '\0';
1077 if( vlc_internals( p_this )->b_thread )
1078 snprintf( psz_thread, 29, " (thread %lu)",
1079 (unsigned long)vlc_internals( p_this )->thread_id );
1081 psz_parent[0] = '\0';
1082 if( p_this->p_parent )
1083 snprintf( psz_parent, 19, ", parent %p", p_this->p_parent );
1085 printf( " %so %p %s%s%s%s%s%s\n", psz_prefix,
1086 p_this, p_this->psz_object_type,
1087 psz_name, psz_thread, psz_refcount, psz_children,
1089 vlc_restorecancel (canc);
1092 static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
1095 char i_back = psz_foo[i_level];
1096 psz_foo[i_level] = '\0';
1098 PrintObject( p_this, psz_foo );
1100 psz_foo[i_level] = i_back;
1102 if( i_level / 2 >= MAX_DUMPSTRUCTURE_DEPTH )
1104 msg_Warn( p_this, "structure tree is too deep" );
1108 for( i = 0 ; i < vlc_internals( p_this )->i_children ; i++ )
1112 psz_foo[i_level-1] = ' ';
1114 if( psz_foo[i_level-2] == '`' )
1116 psz_foo[i_level-2] = ' ';
1120 if( i == vlc_internals( p_this )->i_children - 1 )
1122 psz_foo[i_level] = '`';
1126 psz_foo[i_level] = '|';
1129 psz_foo[i_level+1] = '-';
1130 psz_foo[i_level+2] = '\0';
1132 DumpStructure( vlc_internals( p_this )->pp_children[i], i_level + 2,
1137 static vlc_list_t * NewList( int i_count )
1139 vlc_list_t * p_list = (vlc_list_t *)malloc( sizeof( vlc_list_t ) );
1140 if( p_list == NULL )
1145 p_list->i_count = i_count;
1149 p_list->p_values = NULL;
1153 p_list->p_values = malloc( i_count * sizeof( vlc_value_t ) );
1154 if( p_list->p_values == NULL )
1156 p_list->i_count = 0;
1163 static void ListReplace( vlc_list_t *p_list, vlc_object_t *p_object,
1166 if( p_list == NULL || i_index >= p_list->i_count )
1171 vlc_object_hold( p_object );
1173 p_list->p_values[i_index].p_object = p_object;
1178 /*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
1180 if( p_list == NULL )
1185 p_list->p_values = realloc( p_list->p_values, (p_list->i_count + 1)
1186 * sizeof( vlc_value_t ) );
1187 if( p_list->p_values == NULL )
1189 p_list->i_count = 0;
1193 vlc_object_hold( p_object );
1195 p_list->p_values[p_list->i_count].p_object = p_object;
1201 static int CountChildren( vlc_object_t *p_this, int i_type )
1203 vlc_object_t *p_tmp;
1206 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1208 p_tmp = vlc_internals( p_this )->pp_children[i];
1210 if( vlc_internals( p_tmp )->i_object_type == i_type )
1214 i_count += CountChildren( p_tmp, i_type );
1220 static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
1222 vlc_object_t *p_tmp;
1225 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1227 p_tmp = vlc_internals( p_this )->pp_children[i];
1229 if( vlc_internals( p_tmp )->i_object_type == i_type )
1230 ListReplace( p_list, p_tmp, p_list->i_count++ );
1232 ListChildren( p_list, p_tmp, i_type );