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 void close_nocancel (int fd)
93 int canc = vlc_savecancel ();
95 vlc_restorecancel (canc);
98 static void libvlc_lock (libvlc_int_t *p_libvlc)
100 vlc_mutex_lock (&(libvlc_priv (p_libvlc)->structure_lock));
103 static void libvlc_unlock (libvlc_int_t *p_libvlc)
105 vlc_mutex_unlock (&(libvlc_priv (p_libvlc)->structure_lock));
108 void *__vlc_custom_create( vlc_object_t *p_this, size_t i_size,
109 int i_type, const char *psz_type )
112 vlc_object_internals_t *p_priv;
115 * VLC objects are laid out as follow:
116 * - first the LibVLC-private per-object data,
117 * - then VLC_COMMON members from vlc_object_t,
118 * - finally, the type-specific data (if any).
120 * This function initializes the LibVLC and common data,
121 * and zeroes the rest.
123 p_priv = calloc( 1, sizeof( *p_priv ) + i_size );
127 assert (i_size >= sizeof (vlc_object_t));
128 p_new = (vlc_object_t *)(p_priv + 1);
130 p_new->i_object_type = i_type;
131 p_new->psz_object_type = psz_type;
132 p_new->psz_object_name = NULL;
134 p_new->b_die = false;
135 p_new->b_error = false;
136 p_new->b_force = false;
138 p_new->psz_header = NULL;
141 p_new->i_flags = p_this->i_flags
142 & (OBJECT_FLAGS_NODBG|OBJECT_FLAGS_QUIET|OBJECT_FLAGS_NOINTERACT);
144 p_priv->p_vars = calloc( sizeof( variable_t ), 16 );
146 if( !p_priv->p_vars )
154 libvlc_int_t *self = (libvlc_int_t*)p_new;
155 p_new->p_libvlc = self;
156 vlc_mutex_init (&(libvlc_priv (self)->structure_lock));
157 p_this = p_priv->next = p_priv->prev = p_new;
160 p_new->p_libvlc = p_this->p_libvlc;
162 vlc_spin_init( &p_priv->ref_spin );
163 p_priv->i_refcount = 1;
164 p_priv->pf_destructor = NULL;
165 p_priv->b_thread = false;
166 p_new->p_parent = NULL;
167 p_priv->pp_children = NULL;
168 p_priv->i_children = 0;
170 p_new->p_private = NULL;
172 /* Initialize mutexes and condvars */
173 vlc_mutex_init( &p_priv->lock );
174 vlc_cond_init( &p_priv->wait );
175 vlc_mutex_init( &p_priv->var_lock );
176 vlc_cond_init( &p_priv->var_wait );
177 vlc_spin_init( &p_priv->spin );
178 p_priv->pipes[0] = p_priv->pipes[1] = -1;
180 p_priv->next = p_this;
181 libvlc_lock (p_new->p_libvlc);
182 p_priv->prev = vlc_internals (p_this)->prev;
183 vlc_internals (p_this)->prev = p_new;
184 vlc_internals (p_priv->prev)->next = p_new;
185 libvlc_unlock (p_new->p_libvlc);
187 if (p_new == VLC_OBJECT(p_new->p_libvlc))
188 { /* TODO: should be in src/libvlc.c */
189 int canc = vlc_savecancel ();
190 var_Create( p_new, "list", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
191 var_AddCallback( p_new, "list", DumpCommand, NULL );
192 var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
193 var_AddCallback( p_new, "tree", DumpCommand, NULL );
194 var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
195 var_AddCallback( p_new, "vars", DumpCommand, NULL );
196 vlc_restorecancel (canc);
204 * Allocates and initializes a vlc object.
206 * @param i_type known object type (all of them are negative integer values),
207 * or object byte size (always positive).
209 * @return the new object, or NULL on error.
211 void * __vlc_object_create( vlc_object_t *p_this, int i_type )
213 const char * psz_type;
218 case VLC_OBJECT_INTF:
219 i_size = sizeof(intf_thread_t);
220 psz_type = "interface";
222 case VLC_OBJECT_DECODER:
223 i_size = sizeof(decoder_t);
224 psz_type = "decoder";
226 case VLC_OBJECT_PACKETIZER:
227 i_size = sizeof(decoder_t);
228 psz_type = "packetizer";
230 case VLC_OBJECT_ENCODER:
231 i_size = sizeof(encoder_t);
232 psz_type = "encoder";
234 case VLC_OBJECT_AOUT:
235 i_size = sizeof(aout_instance_t);
236 psz_type = "audio output";
239 assert( i_type > 0 ); /* unknown type?! */
241 i_type = VLC_OBJECT_GENERIC;
242 psz_type = "generic";
246 return vlc_custom_create( p_this, i_size, i_type, psz_type );
251 ****************************************************************************
252 * Set the destructor of a vlc object
254 * This function sets the destructor of the vlc object. It will be called
255 * when the object is destroyed when the its refcount reaches 0.
256 * (It is called by the internal function vlc_object_destroy())
257 *****************************************************************************/
258 void __vlc_object_set_destructor( vlc_object_t *p_this,
259 vlc_destructor_t pf_destructor )
261 vlc_object_internals_t *p_priv = vlc_internals(p_this );
262 p_priv->pf_destructor = pf_destructor;
266 ****************************************************************************
267 * Destroy a vlc object (Internal)
269 * This function destroys an object that has been previously allocated with
270 * vlc_object_create. The object's refcount must be zero and it must not be
271 * attached to other objects in any way.
273 * This function must be called with cancellation disabled (currently).
274 *****************************************************************************/
275 static void vlc_object_destroy( vlc_object_t *p_this )
277 vlc_object_internals_t *p_priv = vlc_internals( p_this );
279 /* Objects are always detached beforehand */
280 assert( !p_this->p_parent );
282 /* Send a kill to the object's thread if applicable */
283 vlc_object_kill( p_this );
285 /* Call the custom "subclass" destructor */
286 if( p_priv->pf_destructor )
287 p_priv->pf_destructor( p_this );
289 /* Any thread must have been cleaned up at this point. */
290 assert( !p_priv->b_thread );
292 /* Destroy the associated variables, starting from the end so that
293 * no memmove calls have to be done. */
294 while( p_priv->i_vars )
296 var_Destroy( p_this, p_priv->p_vars[p_priv->i_vars - 1].psz_name );
299 free( p_priv->p_vars );
300 vlc_cond_destroy( &p_priv->var_wait );
301 vlc_mutex_destroy( &p_priv->var_lock );
303 free( p_this->psz_header );
305 FREENULL( p_this->psz_object_name );
307 vlc_spin_destroy( &p_priv->ref_spin );
308 vlc_mutex_destroy( &p_priv->lock );
309 vlc_cond_destroy( &p_priv->wait );
310 vlc_spin_destroy( &p_priv->spin );
311 if( p_priv->pipes[1] != -1 )
312 close( p_priv->pipes[1] );
313 if( p_priv->pipes[0] != -1 )
314 close( p_priv->pipes[0] );
315 if( VLC_OBJECT(p_this->p_libvlc) == p_this )
316 vlc_mutex_destroy (&(libvlc_priv ((libvlc_int_t *)p_this)->structure_lock));
322 /** Inter-object signaling */
324 void __vlc_object_lock( vlc_object_t *obj )
326 vlc_mutex_lock( &(vlc_internals(obj)->lock) );
329 void __vlc_object_unlock( vlc_object_t *obj )
331 vlc_assert_locked( &(vlc_internals(obj)->lock) );
332 vlc_mutex_unlock( &(vlc_internals(obj)->lock) );
334 void __vlc_object_assert_locked( vlc_object_t *obj )
336 vlc_assert_locked( &(vlc_internals(obj)->lock) );
340 # include <winsock2.h>
341 # include <ws2tcpip.h>
344 * select()-able pipes emulated using Winsock
346 static int pipe (int fd[2])
349 int addrlen = sizeof (addr);
351 SOCKET l = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP), a,
352 c = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
353 if ((l == INVALID_SOCKET) || (c == INVALID_SOCKET))
356 memset (&addr, 0, sizeof (addr));
357 addr.sin_family = AF_INET;
358 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
359 if (bind (l, (PSOCKADDR)&addr, sizeof (addr))
360 || getsockname (l, (PSOCKADDR)&addr, &addrlen)
362 || connect (c, (PSOCKADDR)&addr, addrlen))
365 a = accept (l, NULL, NULL);
366 if (a == INVALID_SOCKET)
377 if (l != INVALID_SOCKET)
379 if (c != INVALID_SOCKET)
385 #define read( a, b, c ) recv (a, b, c, 0)
387 #define write( a, b, c ) send (a, b, c, 0)
389 #define close( a ) closesocket (a)
393 * Returns the readable end of a pipe that becomes readable once termination
394 * of the object is requested (vlc_object_kill()).
395 * This can be used to wake-up out of a select() or poll() event loop, such
396 * typically when doing network I/O.
398 * Note that the pipe will remain the same for the lifetime of the object.
399 * DO NOT read the pipe nor close it yourself. Ever.
401 * @param obj object that would be "killed"
402 * @return a readable pipe descriptor, or -1 on error.
404 int vlc_object_waitpipe( vlc_object_t *obj )
406 int pfd[2] = { -1, -1 };
407 vlc_object_internals_t *internals = vlc_internals( obj );
410 vlc_spin_lock (&internals->spin);
411 if (internals->pipes[0] == -1)
413 /* This can only ever happen if someone killed us without locking: */
414 assert (internals->pipes[1] == -1);
415 vlc_spin_unlock (&internals->spin);
420 vlc_spin_lock (&internals->spin);
421 if (internals->pipes[0] == -1)
423 internals->pipes[0] = pfd[0];
424 internals->pipes[1] = pfd[1];
425 pfd[0] = pfd[1] = -1;
429 vlc_spin_unlock (&internals->spin);
433 /* Race condition: vlc_object_kill() already invoked! */
436 vlc_spin_lock (&internals->spin);
437 fd = internals->pipes[1];
438 internals->pipes[1] = -1;
439 vlc_spin_unlock (&internals->spin);
441 msg_Dbg (obj, "waitpipe: object already dying");
446 /* Race condition: two threads call pipe() - unlikely */
452 return internals->pipes[0];
457 * Suspends until another thread calls vlc_object_signal_unlocked().
458 * The thread may be woken up earlier due to limitations of the underlying
461 * In new code, please use vlc_cond_wait() instead.
463 * This function is a cancellation point. In case of cancellation, the object
464 * will be in locked state.
466 void __vlc_object_wait( vlc_object_t *obj )
468 vlc_object_internals_t *priv = vlc_internals( obj );
469 vlc_assert_locked( &priv->lock);
470 vlc_cond_wait( &priv->wait, &priv->lock );
475 * Wakes up one thread waiting on the object. If no thread are (yet) waiting,
478 * Please do not use this function in new code as we are trying to untangle
479 * objects and threads. Use vlc_cond_wait() instead.
481 void __vlc_object_signal_unlocked( vlc_object_t *obj )
483 vlc_assert_locked (&(vlc_internals(obj)->lock));
484 vlc_cond_signal( &(vlc_internals(obj)->wait) );
489 * Requests termination of an object.
490 * If the object is LibVLC, also request to terminate all its children.
492 void __vlc_object_kill( vlc_object_t *p_this )
494 vlc_object_internals_t *priv = vlc_internals( p_this );
497 vlc_thread_cancel( p_this );
498 vlc_object_lock( p_this );
499 p_this->b_die = true;
501 vlc_spin_lock (&priv->spin);
504 vlc_spin_unlock (&priv->spin);
508 msg_Dbg (p_this, "waitpipe: object killed");
512 vlc_cond_broadcast (&priv->wait);
513 /* This also serves as a memory barrier toward vlc_object_alive(): */
514 vlc_object_unlock( p_this );
518 /*****************************************************************************
519 * find a typed object and increment its refcount
520 *****************************************************************************
521 * This function recursively looks for a given object type. i_mode can be one
522 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
523 *****************************************************************************/
524 void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
526 vlc_object_t *p_found;
528 /* If we are of the requested type ourselves, don't look further */
529 if( !(i_mode & FIND_STRICT) && p_this->i_object_type == i_type )
531 vlc_object_hold( p_this );
535 /* Otherwise, recursively look for the object */
536 if ((i_mode & 0x000f) == FIND_ANYWHERE)
537 return vlc_object_find (p_this->p_libvlc, i_type,
538 (i_mode & ~0x000f)|FIND_CHILD);
540 libvlc_lock (p_this->p_libvlc);
541 p_found = FindObject( p_this, i_type, i_mode );
542 libvlc_unlock (p_this->p_libvlc);
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 libvlc_lock (p_this->p_libvlc);
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 libvlc_unlock (p_this->p_libvlc);
609 * Increment an object reference counter.
611 void * __vlc_object_hold( vlc_object_t *p_this )
613 vlc_object_internals_t *internals = vlc_internals( p_this );
615 vlc_spin_lock( &internals->ref_spin );
616 /* Avoid obvious freed object uses */
617 assert( internals->i_refcount > 0 );
618 /* Increment the counter */
619 internals->i_refcount++;
620 vlc_spin_unlock( &internals->ref_spin );
624 /*****************************************************************************
625 * Decrement an object refcount
626 * And destroy the object if its refcount reach zero.
627 *****************************************************************************/
628 void __vlc_object_release( vlc_object_t *p_this )
630 vlc_object_internals_t *internals = vlc_internals( p_this );
631 vlc_object_t *parent = NULL;
632 bool b_should_destroy;
634 vlc_spin_lock( &internals->ref_spin );
635 assert( internals->i_refcount > 0 );
637 if( internals->i_refcount > 1 )
640 /* There are still other references to the object */
641 internals->i_refcount--;
642 vlc_spin_unlock( &internals->ref_spin );
645 vlc_spin_unlock( &internals->ref_spin );
648 /* Remember that we cannot hold the spin while waiting on the mutex */
649 libvlc_lock (p_this->p_libvlc);
650 /* Take the spin again. Note that another thread may have held the
651 * object in the (very short) mean time. */
652 vlc_spin_lock( &internals->ref_spin );
653 b_should_destroy = --internals->i_refcount == 0;
654 vlc_spin_unlock( &internals->ref_spin );
656 if( b_should_destroy )
658 /* We have no children */
659 assert (internals->i_children == 0);
660 parent = p_this->p_parent;
663 if( VLC_OBJECT(p_this->p_libvlc) == p_this )
666 vlc_object_t *leaked = internals->next;
667 while( leaked != p_this )
669 /* We are leaking this object */
671 "ERROR: leaking object (%p, type:%s, name:%s)\n",
672 leaked, leaked->psz_object_type,
673 leaked->psz_object_name );
674 /* Dump object to ease debugging */
675 vlc_object_dump( leaked );
677 leaked = vlc_internals (leaked)->next;
680 if( internals->next != p_this )
681 /* Dump libvlc object to ease debugging */
682 vlc_object_dump( p_this );
685 /* Remove the object from object list
686 * so that it cannot be encountered by vlc_object_get() */
687 vlc_internals (internals->next)->prev = internals->prev;
688 vlc_internals (internals->prev)->next = internals->next;
691 /* Detach from parent to protect against FIND_CHILDREN */
692 vlc_object_detach_unlocked (p_this);
694 libvlc_unlock (p_this->p_libvlc);
696 if( b_should_destroy )
700 canc = vlc_savecancel ();
701 vlc_object_destroy( p_this );
702 vlc_restorecancel (canc);
704 vlc_object_release (parent);
709 ****************************************************************************
710 * attach object to a parent object
711 *****************************************************************************
712 * This function sets p_this as a child of p_parent, and p_parent as a parent
713 * of p_this. This link can be undone using vlc_object_detach.
714 *****************************************************************************/
715 void __vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
717 if( !p_this ) return;
719 vlc_object_hold (p_parent);
720 libvlc_lock (p_this->p_libvlc);
722 /* Attach the parent to its child */
723 assert (!p_this->p_parent);
724 p_this->p_parent = p_parent;
726 /* Attach the child to its parent */
727 vlc_object_internals_t *priv = vlc_internals( p_parent );
728 INSERT_ELEM( priv->pp_children, priv->i_children, priv->i_children,
730 libvlc_unlock (p_this->p_libvlc);
734 static void vlc_object_detach_unlocked (vlc_object_t *p_this)
736 if (p_this->p_parent == NULL)
739 vlc_object_internals_t *priv = vlc_internals( p_this->p_parent );
743 /* Remove p_this's parent */
744 p_this->p_parent = NULL;
746 /* Remove all of p_parent's children which are p_this */
747 for( i_index = priv->i_children ; i_index-- ; )
749 if( priv->pp_children[i_index] == p_this )
752 for( i = i_index ; i < priv->i_children ; i++ )
753 priv->pp_children[i] = priv->pp_children[i+1];
757 if( priv->i_children )
759 vlc_object_t **pp_children = (vlc_object_t **)
760 realloc( priv->pp_children,
761 priv->i_children * sizeof(vlc_object_t *) );
763 priv->pp_children = pp_children;
767 /* Special case - don't realloc() to zero to avoid leaking */
768 free( priv->pp_children );
769 priv->pp_children = NULL;
775 ****************************************************************************
776 * detach object from its parent
777 *****************************************************************************
778 * This function removes all links between an object and its parent.
779 *****************************************************************************/
780 void __vlc_object_detach( vlc_object_t *p_this )
782 vlc_object_t *p_parent;
783 if( !p_this ) return;
785 libvlc_lock (p_this->p_libvlc);
786 p_parent = p_this->p_parent;
788 vlc_object_detach_unlocked( p_this );
789 libvlc_unlock (p_this->p_libvlc);
792 vlc_object_release (p_parent);
797 ****************************************************************************
798 * find a list typed objects and increment their refcount
799 *****************************************************************************
800 * This function recursively looks for a given object type. i_mode can be one
801 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
802 *****************************************************************************/
803 vlc_list_t * __vlc_list_find( vlc_object_t *p_this, int i_type, int i_mode )
808 /* Look for the objects */
809 switch( i_mode & 0x000f )
812 return vlc_list_find (p_this->p_libvlc, i_type, FIND_CHILD);
815 libvlc_lock (p_this->p_libvlc);
816 i_count = CountChildren( p_this, i_type );
817 p_list = NewList( i_count );
819 /* Check allocation was successful */
820 if( p_list->i_count != i_count )
822 libvlc_unlock (p_this->p_libvlc);
828 ListChildren( p_list, p_this, i_type );
829 libvlc_unlock (p_this->p_libvlc);
833 msg_Err( p_this, "unimplemented!" );
834 p_list = NewList( 0 );
842 * Gets the list of children of an objects, and increment their reference
844 * @return a list (possibly empty) or NULL in case of error.
846 vlc_list_t *__vlc_list_children( vlc_object_t *obj )
849 vlc_object_internals_t *priv = vlc_internals( obj );
851 libvlc_lock (obj->p_libvlc);
852 l = NewList( priv->i_children );
853 for (int i = 0; i < l->i_count; i++)
855 vlc_object_hold( priv->pp_children[i] );
856 l->p_values[i].p_object = priv->pp_children[i];
858 libvlc_unlock (obj->p_libvlc);
862 /*****************************************************************************
863 * DumpCommand: print the current vlc structure
864 *****************************************************************************
865 * This function prints either an ASCII tree showing the connections between
866 * vlc objects, and additional information such as their refcount, thread ID,
867 * etc. (command "tree"), or the same data as a simple list (command "list").
868 *****************************************************************************/
869 static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
870 vlc_value_t oldval, vlc_value_t newval, void *p_data )
872 libvlc_int_t *p_libvlc = p_this->p_libvlc;
874 (void)oldval; (void)p_data;
875 if( *psz_cmd == 'l' )
877 vlc_object_t *cur = VLC_OBJECT (p_libvlc);
879 libvlc_lock (p_this->p_libvlc);
882 PrintObject (cur, "");
883 cur = vlc_internals (cur)->next;
885 while (cur != VLC_OBJECT(p_libvlc));
886 libvlc_unlock (p_this->p_libvlc);
890 vlc_object_t *p_object = NULL;
892 if( *newval.psz_string )
894 /* try using the object's name to find it */
895 p_object = vlc_object_find_name( p_this, newval.psz_string,
903 libvlc_lock (p_this->p_libvlc);
904 if( *psz_cmd == 't' )
906 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
909 p_object = VLC_OBJECT(p_this->p_libvlc);
912 DumpStructure( p_object, 0, psz_foo );
914 else if( *psz_cmd == 'v' )
919 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
921 PrintObject( p_object, "" );
923 if( !vlc_internals( p_object )->i_vars )
924 printf( " `-o No variables\n" );
925 for( i = 0; i < vlc_internals( p_object )->i_vars; i++ )
927 variable_t *p_var = vlc_internals( p_object )->p_vars + i;
929 const char *psz_type = "unknown";
930 switch( p_var->i_type & VLC_VAR_TYPE )
932 #define MYCASE( type, nice ) \
933 case VLC_VAR_ ## type: \
936 MYCASE( VOID, "void" );
937 MYCASE( BOOL, "bool" );
938 MYCASE( INTEGER, "integer" );
939 MYCASE( HOTKEY, "hotkey" );
940 MYCASE( STRING, "string" );
941 MYCASE( MODULE, "module" );
942 MYCASE( FILE, "file" );
943 MYCASE( DIRECTORY, "directory" );
944 MYCASE( VARIABLE, "variable" );
945 MYCASE( FLOAT, "float" );
946 MYCASE( TIME, "time" );
947 MYCASE( ADDRESS, "address" );
948 MYCASE( MUTEX, "mutex" );
949 MYCASE( LIST, "list" );
952 printf( " %c-o \"%s\" (%s",
953 i + 1 == vlc_internals( p_object )->i_vars ? '`' : '|',
954 p_var->psz_name, psz_type );
955 if( p_var->psz_text )
956 printf( ", %s", p_var->psz_text );
958 if( p_var->i_type & VLC_VAR_HASCHOICE )
959 printf( ", has choices" );
960 if( p_var->i_type & VLC_VAR_ISCOMMAND )
961 printf( ", command" );
962 if( p_var->i_entries )
963 printf( ", %d callbacks", p_var->i_entries );
964 switch( p_var->i_type & VLC_VAR_CLASS )
970 printf( ": %s", p_var->val.b_bool ? "true" : "false" );
972 case VLC_VAR_INTEGER:
973 printf( ": %d", p_var->val.i_int );
976 printf( ": \"%s\"", p_var->val.psz_string );
979 printf( ": %f", p_var->val.f_float );
982 printf( ": %"PRIi64, (int64_t)p_var->val.i_time );
984 case VLC_VAR_ADDRESS:
985 printf( ": %p", p_var->val.p_address );
994 libvlc_unlock (p_this->p_libvlc);
996 if( *newval.psz_string )
998 vlc_object_release( p_object );
1005 /*****************************************************************************
1006 * vlc_list_release: free a list previously allocated by vlc_list_find
1007 *****************************************************************************
1008 * This function decreases the refcount of all objects in the list and
1010 *****************************************************************************/
1011 void vlc_list_release( vlc_list_t *p_list )
1015 for( i_index = 0; i_index < p_list->i_count; i_index++ )
1017 vlc_object_release( p_list->p_values[i_index].p_object );
1020 free( p_list->p_values );
1024 /*****************************************************************************
1025 * dump an object. (Debug function)
1026 *****************************************************************************/
1027 static void vlc_object_dump( vlc_object_t *p_this )
1029 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
1032 DumpStructure( p_this, 0, psz_foo );
1035 /* Following functions are local */
1037 static vlc_object_t * FindObject( vlc_object_t *p_this, int i_type, int i_mode )
1040 vlc_object_t *p_tmp;
1042 switch( i_mode & 0x000f )
1045 p_tmp = p_this->p_parent;
1048 if( p_tmp->i_object_type == i_type )
1050 vlc_object_hold( p_tmp );
1055 return FindObject( p_tmp, i_type, i_mode );
1061 for( i = vlc_internals( p_this )->i_children; i--; )
1063 p_tmp = vlc_internals( p_this )->pp_children[i];
1064 if( p_tmp->i_object_type == i_type )
1066 vlc_object_hold( p_tmp );
1069 else if( vlc_internals( p_tmp )->i_children )
1071 p_tmp = FindObject( p_tmp, i_type, i_mode );
1081 /* Handled in vlc_object_find */
1088 static vlc_object_t * FindObjectName( vlc_object_t *p_this,
1089 const char *psz_name,
1093 vlc_object_t *p_tmp;
1095 switch( i_mode & 0x000f )
1098 p_tmp = p_this->p_parent;
1101 if( p_tmp->psz_object_name
1102 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1104 vlc_object_hold( p_tmp );
1109 return FindObjectName( p_tmp, psz_name, i_mode );
1115 for( i = vlc_internals( p_this )->i_children; i--; )
1117 p_tmp = vlc_internals( p_this )->pp_children[i];
1118 if( p_tmp->psz_object_name
1119 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1121 vlc_object_hold( p_tmp );
1124 else if( vlc_internals( p_tmp )->i_children )
1126 p_tmp = FindObjectName( p_tmp, psz_name, i_mode );
1136 /* Handled in vlc_object_find */
1144 static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
1146 char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
1149 int canc = vlc_savecancel ();
1150 memset( &psz_name, 0, sizeof(psz_name) );
1151 if( p_this->psz_object_name )
1153 snprintf( psz_name, 49, " \"%s\"", p_this->psz_object_name );
1155 psz_name[48] = '\"';
1158 psz_children[0] = '\0';
1159 switch( vlc_internals( p_this )->i_children )
1164 strcpy( psz_children, ", 1 child" );
1167 snprintf( psz_children, 19, ", %i children",
1168 vlc_internals( p_this )->i_children );
1172 psz_refcount[0] = '\0';
1173 if( vlc_internals( p_this )->i_refcount > 0 )
1174 snprintf( psz_refcount, 19, ", refcount %u",
1175 vlc_internals( p_this )->i_refcount );
1177 psz_thread[0] = '\0';
1178 if( vlc_internals( p_this )->b_thread )
1179 snprintf( psz_thread, 29, " (thread %lu)",
1180 (unsigned long)vlc_internals( p_this )->thread_id );
1182 psz_parent[0] = '\0';
1183 if( p_this->p_parent )
1184 snprintf( psz_parent, 19, ", parent %p", p_this->p_parent );
1186 printf( " %so %p %s%s%s%s%s%s\n", psz_prefix,
1187 p_this, p_this->psz_object_type,
1188 psz_name, psz_thread, psz_refcount, psz_children,
1190 vlc_restorecancel (canc);
1193 static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
1196 char i_back = psz_foo[i_level];
1197 psz_foo[i_level] = '\0';
1199 PrintObject( p_this, psz_foo );
1201 psz_foo[i_level] = i_back;
1203 if( i_level / 2 >= MAX_DUMPSTRUCTURE_DEPTH )
1205 msg_Warn( p_this, "structure tree is too deep" );
1209 for( i = 0 ; i < vlc_internals( p_this )->i_children ; i++ )
1213 psz_foo[i_level-1] = ' ';
1215 if( psz_foo[i_level-2] == '`' )
1217 psz_foo[i_level-2] = ' ';
1221 if( i == vlc_internals( p_this )->i_children - 1 )
1223 psz_foo[i_level] = '`';
1227 psz_foo[i_level] = '|';
1230 psz_foo[i_level+1] = '-';
1231 psz_foo[i_level+2] = '\0';
1233 DumpStructure( vlc_internals( p_this )->pp_children[i], i_level + 2,
1238 static vlc_list_t * NewList( int i_count )
1240 vlc_list_t * p_list = (vlc_list_t *)malloc( sizeof( vlc_list_t ) );
1241 if( p_list == NULL )
1246 p_list->i_count = i_count;
1250 p_list->p_values = NULL;
1254 p_list->p_values = malloc( i_count * sizeof( vlc_value_t ) );
1255 if( p_list->p_values == NULL )
1257 p_list->i_count = 0;
1264 static void ListReplace( vlc_list_t *p_list, vlc_object_t *p_object,
1267 if( p_list == NULL || i_index >= p_list->i_count )
1272 vlc_object_hold( p_object );
1274 p_list->p_values[i_index].p_object = p_object;
1279 /*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
1281 if( p_list == NULL )
1286 p_list->p_values = realloc( p_list->p_values, (p_list->i_count + 1)
1287 * sizeof( vlc_value_t ) );
1288 if( p_list->p_values == NULL )
1290 p_list->i_count = 0;
1294 vlc_object_hold( p_object );
1296 p_list->p_values[p_list->i_count].p_object = p_object;
1302 static int CountChildren( vlc_object_t *p_this, int i_type )
1304 vlc_object_t *p_tmp;
1307 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1309 p_tmp = vlc_internals( p_this )->pp_children[i];
1311 if( p_tmp->i_object_type == i_type )
1315 i_count += CountChildren( p_tmp, i_type );
1321 static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
1323 vlc_object_t *p_tmp;
1326 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1328 p_tmp = vlc_internals( p_this )->pp_children[i];
1330 if( p_tmp->i_object_type == i_type )
1331 ListReplace( p_list, p_tmp, p_list->i_count++ );
1333 ListChildren( p_list, p_tmp, i_type );