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"
44 #include "audio_output/aout_internal.h"
46 #include <vlc_access.h>
47 #include <vlc_demux.h>
48 #include <vlc_stream.h>
51 #include "stream_output/stream_output.h"
53 #include "vlc_interface.h"
54 #include "vlc_codec.h"
55 #include "vlc_filter.h"
57 #include "variables.h"
63 # include <errno.h> /* ENOSYS */
67 /*****************************************************************************
69 *****************************************************************************/
70 static int DumpCommand( vlc_object_t *, char const *,
71 vlc_value_t, vlc_value_t, void * );
73 static vlc_object_t * FindObject ( vlc_object_t *, int, int );
74 static vlc_object_t * FindObjectName( vlc_object_t *, const char *, int );
75 static void PrintObject ( vlc_object_t *, const char * );
76 static void DumpStructure ( vlc_object_t *, int, char * );
78 static vlc_list_t * NewList ( int );
79 static void ListReplace ( vlc_list_t *, vlc_object_t *, int );
80 /*static void ListAppend ( vlc_list_t *, vlc_object_t * );*/
81 static int CountChildren ( vlc_object_t *, int );
82 static void ListChildren ( vlc_list_t *, vlc_object_t *, int );
84 static void vlc_object_destroy( vlc_object_t *p_this );
85 static void vlc_object_detach_unlocked (vlc_object_t *p_this);
86 static void vlc_object_dump( vlc_object_t *p_this );
88 /*****************************************************************************
89 * Local structure lock
90 *****************************************************************************/
91 static vlc_mutex_t structure_lock;
93 static void close_nocancel (int fd)
95 int canc = vlc_savecancel ();
97 vlc_restorecancel (canc);
100 void *__vlc_custom_create( vlc_object_t *p_this, size_t i_size,
101 int i_type, const char *psz_type )
104 vlc_object_internals_t *p_priv;
107 * VLC objects are laid out as follow:
108 * - first the LibVLC-private per-object data,
109 * - then VLC_COMMON members from vlc_object_t,
110 * - finally, the type-specific data (if any).
112 * This function initializes the LibVLC and common data,
113 * and zeroes the rest.
115 p_priv = calloc( 1, sizeof( *p_priv ) + i_size );
119 assert (i_size >= sizeof (vlc_object_t));
120 p_new = (vlc_object_t *)(p_priv + 1);
122 p_new->i_object_type = i_type;
123 p_new->psz_object_type = psz_type;
124 p_new->psz_object_name = NULL;
126 p_new->b_die = false;
127 p_new->b_error = false;
128 p_new->b_force = false;
130 p_new->psz_header = NULL;
133 p_new->i_flags = p_this->i_flags
134 & (OBJECT_FLAGS_NODBG|OBJECT_FLAGS_QUIET|OBJECT_FLAGS_NOINTERACT);
136 p_priv->p_vars = calloc( sizeof( variable_t ), 16 );
138 if( !p_priv->p_vars )
146 if( i_type == VLC_OBJECT_LIBVLC )
147 p_new->p_libvlc = (libvlc_int_t*)p_new;
150 p_new->p_libvlc = NULL;
151 vlc_mutex_init( &structure_lock );
154 p_this = p_priv->next = p_priv->prev = p_new;
157 p_new->p_libvlc = p_this->p_libvlc;
159 vlc_spin_init( &p_priv->ref_spin );
160 p_priv->i_refcount = 1;
161 p_priv->pf_destructor = NULL;
162 p_priv->b_thread = false;
163 p_new->p_parent = NULL;
164 p_priv->pp_children = NULL;
165 p_priv->i_children = 0;
167 p_new->p_private = NULL;
169 /* Initialize mutexes and condvars */
170 vlc_mutex_init( &p_priv->lock );
171 vlc_cond_init( &p_priv->wait );
172 vlc_mutex_init( &p_priv->var_lock );
173 vlc_spin_init( &p_priv->spin );
174 p_priv->pipes[0] = p_priv->pipes[1] = -1;
176 p_priv->next = p_this;
177 vlc_mutex_lock( &structure_lock );
178 p_priv->prev = vlc_internals (p_this)->prev;
179 vlc_internals (p_this)->prev = p_new;
180 vlc_internals (p_priv->prev)->next = p_new;
181 vlc_mutex_unlock( &structure_lock );
183 if( i_type == VLC_OBJECT_LIBVLC )
185 int canc = vlc_savecancel ();
186 var_Create( p_new, "list", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
187 var_AddCallback( p_new, "list", DumpCommand, NULL );
188 var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
189 var_AddCallback( p_new, "tree", DumpCommand, NULL );
190 var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
191 var_AddCallback( p_new, "vars", DumpCommand, NULL );
192 vlc_restorecancel (canc);
200 * Allocates and initializes a vlc object.
202 * @param i_type known object type (all of them are negative integer values),
203 * or object byte size (always positive).
205 * @return the new object, or NULL on error.
207 void * __vlc_object_create( vlc_object_t *p_this, int i_type )
209 const char * psz_type;
214 case VLC_OBJECT_INTF:
215 i_size = sizeof(intf_thread_t);
216 psz_type = "interface";
218 case VLC_OBJECT_DECODER:
219 i_size = sizeof(decoder_t);
220 psz_type = "decoder";
222 case VLC_OBJECT_PACKETIZER:
223 i_size = sizeof(decoder_t);
224 psz_type = "packetizer";
226 case VLC_OBJECT_ENCODER:
227 i_size = sizeof(encoder_t);
228 psz_type = "encoder";
230 case VLC_OBJECT_AOUT:
231 i_size = sizeof(aout_instance_t);
232 psz_type = "audio output";
235 assert( i_type > 0 ); /* unknown type?! */
237 i_type = VLC_OBJECT_GENERIC;
238 psz_type = "generic";
242 return vlc_custom_create( p_this, i_size, i_type, psz_type );
247 ****************************************************************************
248 * Set the destructor of a vlc object
250 * This function sets the destructor of the vlc object. It will be called
251 * when the object is destroyed when the its refcount reaches 0.
252 * (It is called by the internal function vlc_object_destroy())
253 *****************************************************************************/
254 void __vlc_object_set_destructor( vlc_object_t *p_this,
255 vlc_destructor_t pf_destructor )
257 vlc_object_internals_t *p_priv = vlc_internals(p_this );
258 p_priv->pf_destructor = pf_destructor;
262 ****************************************************************************
263 * Destroy a vlc object (Internal)
265 * This function destroys an object that has been previously allocated with
266 * vlc_object_create. The object's refcount must be zero and it must not be
267 * attached to other objects in any way.
269 * This function must be called with cancellation disabled (currently).
270 *****************************************************************************/
271 static void vlc_object_destroy( vlc_object_t *p_this )
273 vlc_object_internals_t *p_priv = vlc_internals( p_this );
275 /* Objects are always detached beforehand */
276 assert( !p_this->p_parent );
278 /* Send a kill to the object's thread if applicable */
279 vlc_object_kill( p_this );
281 /* Call the custom "subclass" destructor */
282 if( p_priv->pf_destructor )
283 p_priv->pf_destructor( p_this );
285 /* Any thread must have been cleaned up at this point. */
286 assert( !p_priv->b_thread );
288 /* Destroy the associated variables, starting from the end so that
289 * no memmove calls have to be done. */
290 while( p_priv->i_vars )
292 var_Destroy( p_this, p_priv->p_vars[p_priv->i_vars - 1].psz_name );
295 free( p_priv->p_vars );
296 vlc_mutex_destroy( &p_priv->var_lock );
298 free( p_this->psz_header );
300 if( p_this->p_libvlc == NULL )
301 /* We are the global object ... no need to lock. */
302 vlc_mutex_destroy( &structure_lock );
304 FREENULL( p_this->psz_object_name );
306 vlc_spin_destroy( &p_priv->ref_spin );
307 vlc_mutex_destroy( &p_priv->lock );
308 vlc_cond_destroy( &p_priv->wait );
309 vlc_spin_destroy( &p_priv->spin );
310 if( p_priv->pipes[1] != -1 )
311 close( p_priv->pipes[1] );
312 if( p_priv->pipes[0] != -1 )
313 close( p_priv->pipes[0] );
319 /** Inter-object signaling */
321 void __vlc_object_lock( vlc_object_t *obj )
323 vlc_mutex_lock( &(vlc_internals(obj)->lock) );
326 void __vlc_object_unlock( vlc_object_t *obj )
328 vlc_assert_locked( &(vlc_internals(obj)->lock) );
329 vlc_mutex_unlock( &(vlc_internals(obj)->lock) );
333 # include <winsock2.h>
334 # include <ws2tcpip.h>
337 * select()-able pipes emulated using Winsock
339 static int pipe (int fd[2])
342 int addrlen = sizeof (addr);
344 SOCKET l = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP), a,
345 c = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
346 if ((l == INVALID_SOCKET) || (c == INVALID_SOCKET))
349 memset (&addr, 0, sizeof (addr));
350 addr.sin_family = AF_INET;
351 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
352 if (bind (l, (PSOCKADDR)&addr, sizeof (addr))
353 || getsockname (l, (PSOCKADDR)&addr, &addrlen)
355 || connect (c, (PSOCKADDR)&addr, addrlen))
358 a = accept (l, NULL, NULL);
359 if (a == INVALID_SOCKET)
370 if (l != INVALID_SOCKET)
372 if (c != INVALID_SOCKET)
378 #define read( a, b, c ) recv (a, b, c, 0)
380 #define write( a, b, c ) send (a, b, c, 0)
382 #define close( a ) closesocket (a)
386 * Returns the readable end of a pipe that becomes readable once termination
387 * of the object is requested (vlc_object_kill()).
388 * This can be used to wake-up out of a select() or poll() event loop, such
389 * typically when doing network I/O.
391 * Note that the pipe will remain the same for the lifetime of the object.
392 * DO NOT read the pipe nor close it yourself. Ever.
394 * @param obj object that would be "killed"
395 * @return a readable pipe descriptor, or -1 on error.
397 int __vlc_object_waitpipe( vlc_object_t *obj )
399 int pfd[2] = { -1, -1 };
400 vlc_object_internals_t *internals = vlc_internals( obj );
403 vlc_spin_lock (&internals->spin);
404 if (internals->pipes[0] == -1)
406 /* This can only ever happen if someone killed us without locking: */
407 assert (internals->pipes[1] == -1);
408 vlc_spin_unlock (&internals->spin);
413 vlc_spin_lock (&internals->spin);
414 if (internals->pipes[0] == -1)
416 internals->pipes[0] = pfd[0];
417 internals->pipes[1] = pfd[1];
418 pfd[0] = pfd[1] = -1;
422 vlc_spin_unlock (&internals->spin);
426 /* Race condition: vlc_object_kill() already invoked! */
429 vlc_spin_lock (&internals->spin);
430 fd = internals->pipes[1];
431 internals->pipes[1] = -1;
432 vlc_spin_unlock (&internals->spin);
434 msg_Dbg (obj, "waitpipe: object already dying");
439 /* Race condition: two threads call pipe() - unlikely */
445 return internals->pipes[0];
450 * Suspends until another thread calls vlc_object_signal_unlocked().
451 * The thread may be woken up earlier due to limitations of the underlying
454 * In new code, please use vlc_cond_wait() instead.
456 * This function is a cancellation point. In case of cancellation, the object
457 * will be in locked state.
459 void __vlc_object_wait( vlc_object_t *obj )
461 vlc_object_internals_t *priv = vlc_internals( obj );
462 vlc_assert_locked( &priv->lock);
463 vlc_cond_wait( &priv->wait, &priv->lock );
468 * Wakes up one thread waiting on the object. If no thread are (yet) waiting,
471 * Please do not use this function in new code as we are trying to untangle
472 * objects and threads. Use vlc_cond_wait() instead.
474 void __vlc_object_signal_unlocked( vlc_object_t *obj )
476 vlc_assert_locked (&(vlc_internals(obj)->lock));
477 vlc_cond_signal( &(vlc_internals(obj)->wait) );
482 * Requests termination of an object.
483 * If the object is LibVLC, also request to terminate all its children.
485 void __vlc_object_kill( vlc_object_t *p_this )
487 vlc_object_internals_t *priv = vlc_internals( p_this );
490 vlc_thread_cancel( p_this );
491 vlc_object_lock( p_this );
492 p_this->b_die = true;
494 vlc_spin_lock (&priv->spin);
497 vlc_spin_unlock (&priv->spin);
501 msg_Dbg (p_this, "waitpipe: object killed");
505 vlc_cond_broadcast (&priv->wait);
506 /* This also serves as a memory barrier toward vlc_object_alive(): */
507 vlc_object_unlock( p_this );
511 /*****************************************************************************
512 * find a typed object and increment its refcount
513 *****************************************************************************
514 * This function recursively looks for a given object type. i_mode can be one
515 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
516 *****************************************************************************/
517 void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
519 vlc_object_t *p_found;
521 /* If we are of the requested type ourselves, don't look further */
522 if( !(i_mode & FIND_STRICT) && p_this->i_object_type == i_type )
524 vlc_object_hold( p_this );
528 /* Otherwise, recursively look for the object */
529 if ((i_mode & 0x000f) == FIND_ANYWHERE)
532 if (i_type == VLC_OBJECT_PLAYLIST)
533 msg_Err (p_this, "using vlc_object_find(VLC_OBJECT_PLAYLIST) "
534 "instead of pl_Hold()");
536 return vlc_object_find (p_this->p_libvlc, i_type,
537 (i_mode & ~0x000f)|FIND_CHILD);
540 vlc_mutex_lock( &structure_lock );
541 p_found = FindObject( p_this, i_type, i_mode );
542 vlc_mutex_unlock( &structure_lock );
546 #undef vlc_object_find_name
548 * Finds a named object and increment its reference count.
549 * Beware that objects found in this manner can be "owned" by another thread,
550 * be of _any_ type, and be attached to any module (if any). With such an
551 * object reference, you can set or get object variables, emit log messages,
552 * and read write-once object parameters (psz_object_type, etc).
553 * You CANNOT cast the object to a more specific object type, and you
554 * definitely cannot invoke object type-specific callbacks with this.
556 * @param p_this object to search from
557 * @param psz_name name of the object to search for
558 * @param i_mode search direction: FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
560 * @return a matching object (must be released by the caller),
563 vlc_object_t *vlc_object_find_name( vlc_object_t *p_this,
564 const char *psz_name, int i_mode )
566 vlc_object_t *p_found;
568 /* If have the requested name ourselves, don't look further */
569 if( !(i_mode & FIND_STRICT)
570 && p_this->psz_object_name
571 && !strcmp( p_this->psz_object_name, psz_name ) )
573 vlc_object_hold( p_this );
577 vlc_mutex_lock( &structure_lock );
579 /* Otherwise, recursively look for the object */
580 if( (i_mode & 0x000f) == FIND_ANYWHERE )
582 vlc_object_t *p_root = p_this;
585 while( p_root->p_parent != NULL &&
586 p_root != VLC_OBJECT( p_this->p_libvlc ) )
588 p_root = p_root->p_parent;
591 p_found = FindObjectName( p_root, psz_name,
592 (i_mode & ~0x000f)|FIND_CHILD );
593 if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
595 p_found = FindObjectName( VLC_OBJECT( p_this->p_libvlc ),
596 psz_name, (i_mode & ~0x000f)|FIND_CHILD );
601 p_found = FindObjectName( p_this, psz_name, i_mode );
604 vlc_mutex_unlock( &structure_lock );
610 * Increment an object reference counter.
612 void * __vlc_object_hold( vlc_object_t *p_this )
614 vlc_object_internals_t *internals = vlc_internals( p_this );
616 vlc_spin_lock( &internals->ref_spin );
617 /* Avoid obvious freed object uses */
618 assert( internals->i_refcount > 0 );
619 /* Increment the counter */
620 internals->i_refcount++;
621 vlc_spin_unlock( &internals->ref_spin );
625 /*****************************************************************************
626 * Decrement an object refcount
627 * And destroy the object if its refcount reach zero.
628 *****************************************************************************/
629 void __vlc_object_release( vlc_object_t *p_this )
631 vlc_object_internals_t *internals = vlc_internals( p_this );
632 vlc_object_t *parent = NULL;
633 bool b_should_destroy;
635 vlc_spin_lock( &internals->ref_spin );
636 assert( internals->i_refcount > 0 );
638 if( internals->i_refcount > 1 )
641 /* There are still other references to the object */
642 internals->i_refcount--;
643 vlc_spin_unlock( &internals->ref_spin );
646 vlc_spin_unlock( &internals->ref_spin );
649 /* Remember that we cannot hold the spin while waiting on the mutex */
650 vlc_mutex_lock( &structure_lock );
651 /* Take the spin again. Note that another thread may have held the
652 * object in the (very short) mean time. */
653 vlc_spin_lock( &internals->ref_spin );
654 b_should_destroy = --internals->i_refcount == 0;
655 vlc_spin_unlock( &internals->ref_spin );
657 if( b_should_destroy )
659 /* We have no children */
660 assert (internals->i_children == 0);
661 parent = p_this->p_parent;
664 if( VLC_OBJECT(p_this->p_libvlc) == p_this )
667 vlc_object_t *leaked = internals->next;
668 while( leaked != p_this )
670 /* We are leaking this object */
672 "ERROR: leaking object (%p, type:%s, name:%s)\n",
673 leaked, leaked->psz_object_type,
674 leaked->psz_object_name );
675 /* Dump object to ease debugging */
676 vlc_object_dump( leaked );
678 leaked = vlc_internals (leaked)->next;
681 if( internals->next != p_this )
682 /* Dump libvlc object to ease debugging */
683 vlc_object_dump( p_this );
686 /* Remove the object from object list
687 * so that it cannot be encountered by vlc_object_get() */
688 vlc_internals (internals->next)->prev = internals->prev;
689 vlc_internals (internals->prev)->next = internals->next;
692 /* Detach from parent to protect against FIND_CHILDREN */
693 vlc_object_detach_unlocked (p_this);
695 vlc_mutex_unlock( &structure_lock );
697 if( b_should_destroy )
701 canc = vlc_savecancel ();
702 vlc_object_destroy( p_this );
703 vlc_restorecancel (canc);
705 vlc_object_release (parent);
710 ****************************************************************************
711 * attach object to a parent object
712 *****************************************************************************
713 * This function sets p_this as a child of p_parent, and p_parent as a parent
714 * of p_this. This link can be undone using vlc_object_detach.
715 *****************************************************************************/
716 void __vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
718 if( !p_this ) return;
720 vlc_object_hold (p_parent);
721 vlc_mutex_lock( &structure_lock );
723 /* Attach the parent to its child */
724 assert (!p_this->p_parent);
725 p_this->p_parent = p_parent;
727 /* Attach the child to its parent */
728 vlc_object_internals_t *priv = vlc_internals( p_parent );
729 INSERT_ELEM( priv->pp_children, priv->i_children, priv->i_children,
732 vlc_mutex_unlock( &structure_lock );
736 static void vlc_object_detach_unlocked (vlc_object_t *p_this)
738 vlc_assert_locked (&structure_lock);
740 if (p_this->p_parent == NULL)
743 vlc_object_internals_t *priv = vlc_internals( p_this->p_parent );
747 /* Remove p_this's parent */
748 p_this->p_parent = NULL;
750 /* Remove all of p_parent's children which are p_this */
751 for( i_index = priv->i_children ; i_index-- ; )
753 if( priv->pp_children[i_index] == p_this )
756 for( i = i_index ; i < priv->i_children ; i++ )
757 priv->pp_children[i] = priv->pp_children[i+1];
761 if( priv->i_children )
763 vlc_object_t **pp_children = (vlc_object_t **)
764 realloc( priv->pp_children,
765 priv->i_children * sizeof(vlc_object_t *) );
767 priv->pp_children = pp_children;
771 /* Special case - don't realloc() to zero to avoid leaking */
772 free( priv->pp_children );
773 priv->pp_children = NULL;
779 ****************************************************************************
780 * detach object from its parent
781 *****************************************************************************
782 * This function removes all links between an object and its parent.
783 *****************************************************************************/
784 void __vlc_object_detach( vlc_object_t *p_this )
786 vlc_object_t *p_parent;
787 if( !p_this ) return;
789 vlc_mutex_lock( &structure_lock );
790 p_parent = p_this->p_parent;
792 vlc_object_detach_unlocked( p_this );
793 vlc_mutex_unlock( &structure_lock );
796 vlc_object_release (p_parent);
801 ****************************************************************************
802 * find a list typed objects and increment their refcount
803 *****************************************************************************
804 * This function recursively looks for a given object type. i_mode can be one
805 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
806 *****************************************************************************/
807 vlc_list_t * __vlc_list_find( vlc_object_t *p_this, int i_type, int i_mode )
812 /* Look for the objects */
813 switch( i_mode & 0x000f )
816 return vlc_list_find (p_this->p_libvlc, i_type, FIND_CHILD);
819 vlc_mutex_lock( &structure_lock );
820 i_count = CountChildren( p_this, i_type );
821 p_list = NewList( i_count );
823 /* Check allocation was successful */
824 if( p_list->i_count != i_count )
826 vlc_mutex_unlock( &structure_lock );
827 msg_Err( p_this, "list allocation failed!" );
833 ListChildren( p_list, p_this, i_type );
834 vlc_mutex_unlock( &structure_lock );
838 msg_Err( p_this, "unimplemented!" );
839 p_list = NewList( 0 );
847 * Gets the list of children of an objects, and increment their reference
849 * @return a list (possibly empty) or NULL in case of error.
851 vlc_list_t *__vlc_list_children( vlc_object_t *obj )
854 vlc_object_internals_t *priv = vlc_internals( obj );
856 vlc_mutex_lock( &structure_lock );
857 l = NewList( priv->i_children );
858 for (int i = 0; i < l->i_count; i++)
860 vlc_object_hold( priv->pp_children[i] );
861 l->p_values[i].p_object = priv->pp_children[i];
863 vlc_mutex_unlock( &structure_lock );
867 /*****************************************************************************
868 * DumpCommand: print the current vlc structure
869 *****************************************************************************
870 * This function prints either an ASCII tree showing the connections between
871 * vlc objects, and additional information such as their refcount, thread ID,
872 * etc. (command "tree"), or the same data as a simple list (command "list").
873 *****************************************************************************/
874 static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
875 vlc_value_t oldval, vlc_value_t newval, void *p_data )
877 libvlc_int_t *p_libvlc = p_this->p_libvlc;
879 (void)oldval; (void)p_data;
880 if( *psz_cmd == 'l' )
882 vlc_object_t *cur = VLC_OBJECT (p_libvlc);
884 vlc_mutex_lock( &structure_lock );
887 PrintObject (cur, "");
888 cur = vlc_internals (cur)->next;
890 while (cur != VLC_OBJECT(p_libvlc));
891 vlc_mutex_unlock( &structure_lock );
895 vlc_object_t *p_object = NULL;
897 if( *newval.psz_string )
900 int i_id = strtol( newval.psz_string, &end, 0 );
901 /* try using the object's name to find it */
902 p_object = vlc_object_find_name( p_this, newval.psz_string,
910 vlc_mutex_lock( &structure_lock );
912 if( *psz_cmd == 't' )
914 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
917 p_object = VLC_OBJECT(p_this->p_libvlc);
920 DumpStructure( p_object, 0, psz_foo );
922 else if( *psz_cmd == 'v' )
927 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
929 PrintObject( p_object, "" );
931 if( !vlc_internals( p_object )->i_vars )
932 printf( " `-o No variables\n" );
933 for( i = 0; i < vlc_internals( p_object )->i_vars; i++ )
935 variable_t *p_var = vlc_internals( p_object )->p_vars + i;
937 const char *psz_type = "unknown";
938 switch( p_var->i_type & VLC_VAR_TYPE )
940 #define MYCASE( type, nice ) \
941 case VLC_VAR_ ## type: \
944 MYCASE( VOID, "void" );
945 MYCASE( BOOL, "bool" );
946 MYCASE( INTEGER, "integer" );
947 MYCASE( HOTKEY, "hotkey" );
948 MYCASE( STRING, "string" );
949 MYCASE( MODULE, "module" );
950 MYCASE( FILE, "file" );
951 MYCASE( DIRECTORY, "directory" );
952 MYCASE( VARIABLE, "variable" );
953 MYCASE( FLOAT, "float" );
954 MYCASE( TIME, "time" );
955 MYCASE( ADDRESS, "address" );
956 MYCASE( MUTEX, "mutex" );
957 MYCASE( LIST, "list" );
960 printf( " %c-o \"%s\" (%s",
961 i + 1 == vlc_internals( p_object )->i_vars ? '`' : '|',
962 p_var->psz_name, psz_type );
963 if( p_var->psz_text )
964 printf( ", %s", p_var->psz_text );
966 if( p_var->i_type & VLC_VAR_HASCHOICE )
967 printf( ", has choices" );
968 if( p_var->i_type & VLC_VAR_ISCOMMAND )
969 printf( ", command" );
970 if( p_var->i_entries )
971 printf( ", %d callbacks", p_var->i_entries );
972 switch( p_var->i_type & VLC_VAR_CLASS )
978 printf( ": %s", p_var->val.b_bool ? "true" : "false" );
980 case VLC_VAR_INTEGER:
981 printf( ": %d", p_var->val.i_int );
984 printf( ": \"%s\"", p_var->val.psz_string );
987 printf( ": %f", p_var->val.f_float );
990 printf( ": %"PRIi64, (int64_t)p_var->val.i_time );
992 case VLC_VAR_ADDRESS:
993 printf( ": %p", p_var->val.p_address );
1003 vlc_mutex_unlock( &structure_lock );
1005 if( *newval.psz_string )
1007 vlc_object_release( p_object );
1014 /*****************************************************************************
1015 * vlc_list_release: free a list previously allocated by vlc_list_find
1016 *****************************************************************************
1017 * This function decreases the refcount of all objects in the list and
1019 *****************************************************************************/
1020 void vlc_list_release( vlc_list_t *p_list )
1024 for( i_index = 0; i_index < p_list->i_count; i_index++ )
1026 vlc_object_release( p_list->p_values[i_index].p_object );
1029 free( p_list->p_values );
1033 /*****************************************************************************
1034 * dump an object. (Debug function)
1035 *****************************************************************************/
1036 static void vlc_object_dump( vlc_object_t *p_this )
1038 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
1041 vlc_assert_locked( &structure_lock );
1042 DumpStructure( p_this, 0, psz_foo );
1045 /* Following functions are local */
1047 static vlc_object_t * FindObject( vlc_object_t *p_this, int i_type, int i_mode )
1050 vlc_object_t *p_tmp;
1052 switch( i_mode & 0x000f )
1055 p_tmp = p_this->p_parent;
1058 if( p_tmp->i_object_type == i_type )
1060 vlc_object_hold( p_tmp );
1065 return FindObject( p_tmp, i_type, i_mode );
1071 for( i = vlc_internals( p_this )->i_children; i--; )
1073 p_tmp = vlc_internals( p_this )->pp_children[i];
1074 if( p_tmp->i_object_type == i_type )
1076 vlc_object_hold( p_tmp );
1079 else if( vlc_internals( p_tmp )->i_children )
1081 p_tmp = FindObject( p_tmp, i_type, i_mode );
1091 /* Handled in vlc_object_find */
1098 static vlc_object_t * FindObjectName( vlc_object_t *p_this,
1099 const char *psz_name,
1103 vlc_object_t *p_tmp;
1105 switch( i_mode & 0x000f )
1108 p_tmp = p_this->p_parent;
1111 if( p_tmp->psz_object_name
1112 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1114 vlc_object_hold( p_tmp );
1119 return FindObjectName( p_tmp, psz_name, i_mode );
1125 for( i = vlc_internals( p_this )->i_children; i--; )
1127 p_tmp = vlc_internals( p_this )->pp_children[i];
1128 if( p_tmp->psz_object_name
1129 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1131 vlc_object_hold( p_tmp );
1134 else if( vlc_internals( p_tmp )->i_children )
1136 p_tmp = FindObjectName( p_tmp, psz_name, i_mode );
1146 /* Handled in vlc_object_find */
1154 static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
1156 char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
1159 int canc = vlc_savecancel ();
1160 memset( &psz_name, 0, sizeof(psz_name) );
1161 if( p_this->psz_object_name )
1163 snprintf( psz_name, 49, " \"%s\"", p_this->psz_object_name );
1165 psz_name[48] = '\"';
1168 psz_children[0] = '\0';
1169 switch( vlc_internals( p_this )->i_children )
1174 strcpy( psz_children, ", 1 child" );
1177 snprintf( psz_children, 19, ", %i children",
1178 vlc_internals( p_this )->i_children );
1182 psz_refcount[0] = '\0';
1183 if( vlc_internals( p_this )->i_refcount > 0 )
1184 snprintf( psz_refcount, 19, ", refcount %u",
1185 vlc_internals( p_this )->i_refcount );
1187 psz_thread[0] = '\0';
1188 if( vlc_internals( p_this )->b_thread )
1189 snprintf( psz_thread, 29, " (thread %lu)",
1190 (unsigned long)vlc_internals( p_this )->thread_id );
1192 psz_parent[0] = '\0';
1193 if( p_this->p_parent )
1194 snprintf( psz_parent, 19, ", parent %p", p_this->p_parent );
1196 printf( " %so %p %s%s%s%s%s%s\n", psz_prefix,
1197 p_this, p_this->psz_object_type,
1198 psz_name, psz_thread, psz_refcount, psz_children,
1200 vlc_restorecancel (canc);
1203 static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
1206 char i_back = psz_foo[i_level];
1207 psz_foo[i_level] = '\0';
1209 PrintObject( p_this, psz_foo );
1211 psz_foo[i_level] = i_back;
1213 if( i_level / 2 >= MAX_DUMPSTRUCTURE_DEPTH )
1215 msg_Warn( p_this, "structure tree is too deep" );
1219 for( i = 0 ; i < vlc_internals( p_this )->i_children ; i++ )
1223 psz_foo[i_level-1] = ' ';
1225 if( psz_foo[i_level-2] == '`' )
1227 psz_foo[i_level-2] = ' ';
1231 if( i == vlc_internals( p_this )->i_children - 1 )
1233 psz_foo[i_level] = '`';
1237 psz_foo[i_level] = '|';
1240 psz_foo[i_level+1] = '-';
1241 psz_foo[i_level+2] = '\0';
1243 DumpStructure( vlc_internals( p_this )->pp_children[i], i_level + 2,
1248 static vlc_list_t * NewList( int i_count )
1250 vlc_list_t * p_list = (vlc_list_t *)malloc( sizeof( vlc_list_t ) );
1251 if( p_list == NULL )
1256 p_list->i_count = i_count;
1260 p_list->p_values = NULL;
1264 p_list->p_values = malloc( i_count * sizeof( vlc_value_t ) );
1265 if( p_list->p_values == NULL )
1267 p_list->i_count = 0;
1274 static void ListReplace( vlc_list_t *p_list, vlc_object_t *p_object,
1277 if( p_list == NULL || i_index >= p_list->i_count )
1282 vlc_object_hold( p_object );
1284 p_list->p_values[i_index].p_object = p_object;
1289 /*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
1291 if( p_list == NULL )
1296 p_list->p_values = realloc( p_list->p_values, (p_list->i_count + 1)
1297 * sizeof( vlc_value_t ) );
1298 if( p_list->p_values == NULL )
1300 p_list->i_count = 0;
1304 vlc_object_hold( p_object );
1306 p_list->p_values[p_list->i_count].p_object = p_object;
1312 static int CountChildren( vlc_object_t *p_this, int i_type )
1314 vlc_object_t *p_tmp;
1317 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1319 p_tmp = vlc_internals( p_this )->pp_children[i];
1321 if( p_tmp->i_object_type == i_type )
1325 i_count += CountChildren( p_tmp, i_type );
1331 static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
1333 vlc_object_t *p_tmp;
1336 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1338 p_tmp = vlc_internals( p_this )->pp_children[i];
1340 if( p_tmp->i_object_type == i_type )
1341 ListReplace( p_list, p_tmp, p_list->i_count++ );
1343 ListChildren( p_list, p_tmp, i_type );