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 */
65 #ifdef HAVE_SYS_EVENTFD_H
66 # include <sys/eventfd.h>
70 /*****************************************************************************
72 *****************************************************************************/
73 static int DumpCommand( vlc_object_t *, char const *,
74 vlc_value_t, vlc_value_t, void * );
76 static vlc_object_t * FindObject ( vlc_object_t *, int, int );
77 static vlc_object_t * FindObjectName( vlc_object_t *, const char *, int );
78 static void PrintObject ( vlc_object_t *, const char * );
79 static void DumpStructure ( vlc_object_t *, int, char * );
81 static vlc_list_t * NewList ( int );
82 static void ListReplace ( vlc_list_t *, vlc_object_t *, int );
83 /*static void ListAppend ( vlc_list_t *, vlc_object_t * );*/
84 static int CountChildren ( vlc_object_t *, int );
85 static void ListChildren ( vlc_list_t *, vlc_object_t *, int );
87 static void vlc_object_destroy( vlc_object_t *p_this );
88 static void vlc_object_detach_unlocked (vlc_object_t *p_this);
90 static void vlc_object_dump( vlc_object_t *p_this );
93 /*****************************************************************************
94 * Local structure lock
95 *****************************************************************************/
96 static void close_nocancel (int fd)
98 int canc = vlc_savecancel ();
100 vlc_restorecancel (canc);
103 static void libvlc_lock (libvlc_int_t *p_libvlc)
105 vlc_mutex_lock (&(libvlc_priv (p_libvlc)->structure_lock));
108 static void libvlc_unlock (libvlc_int_t *p_libvlc)
110 vlc_mutex_unlock (&(libvlc_priv (p_libvlc)->structure_lock));
113 void *__vlc_custom_create( vlc_object_t *p_this, size_t i_size,
114 int i_type, const char *psz_type )
117 vlc_object_internals_t *p_priv;
120 * VLC objects are laid out as follow:
121 * - first the LibVLC-private per-object data,
122 * - then VLC_COMMON members from vlc_object_t,
123 * - finally, the type-specific data (if any).
125 * This function initializes the LibVLC and common data,
126 * and zeroes the rest.
128 p_priv = calloc( 1, sizeof( *p_priv ) + i_size );
132 assert (i_size >= sizeof (vlc_object_t));
133 p_new = (vlc_object_t *)(p_priv + 1);
135 p_priv->i_object_type = i_type;
136 p_new->psz_object_type = psz_type;
137 p_new->psz_object_name = NULL;
139 p_new->b_die = false;
140 p_new->b_error = false;
141 p_new->b_force = false;
143 p_new->psz_header = NULL;
146 p_new->i_flags = p_this->i_flags
147 & (OBJECT_FLAGS_NODBG|OBJECT_FLAGS_QUIET|OBJECT_FLAGS_NOINTERACT);
149 p_priv->p_vars = calloc( 16, sizeof( variable_t ) );
151 if( !p_priv->p_vars )
159 libvlc_int_t *self = (libvlc_int_t*)p_new;
160 p_new->p_libvlc = self;
161 vlc_mutex_init (&(libvlc_priv (self)->structure_lock));
162 p_this = p_priv->next = p_priv->prev = p_new;
165 p_new->p_libvlc = p_this->p_libvlc;
167 vlc_spin_init( &p_priv->ref_spin );
168 p_priv->i_refcount = 1;
169 p_priv->pf_destructor = NULL;
170 p_priv->b_thread = false;
171 p_new->p_parent = NULL;
172 p_priv->pp_children = NULL;
173 p_priv->i_children = 0;
175 p_new->p_private = NULL;
177 /* Initialize mutexes and condvars */
178 vlc_mutex_init( &p_priv->lock );
179 vlc_cond_init( &p_priv->wait );
180 vlc_mutex_init( &p_priv->var_lock );
181 vlc_cond_init( &p_priv->var_wait );
182 p_priv->pipes[0] = p_priv->pipes[1] = -1;
184 p_priv->next = p_this;
185 libvlc_lock (p_new->p_libvlc);
186 p_priv->prev = vlc_internals (p_this)->prev;
187 vlc_internals (p_this)->prev = p_new;
188 vlc_internals (p_priv->prev)->next = p_new;
189 libvlc_unlock (p_new->p_libvlc);
191 if (p_new == VLC_OBJECT(p_new->p_libvlc))
192 { /* TODO: should be in src/libvlc.c */
193 int canc = vlc_savecancel ();
194 var_Create( p_new, "list", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
195 var_AddCallback( p_new, "list", DumpCommand, NULL );
196 var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
197 var_AddCallback( p_new, "tree", DumpCommand, NULL );
198 var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
199 var_AddCallback( p_new, "vars", DumpCommand, NULL );
200 vlc_restorecancel (canc);
208 * Allocates and initializes a vlc object.
210 * @param i_type known object type (all of them are negative integer values),
211 * or object byte size (always positive).
213 * @return the new object, or NULL on error.
215 void * __vlc_object_create( vlc_object_t *p_this, int i_type )
217 const char * psz_type;
222 case VLC_OBJECT_INTF:
223 i_size = sizeof(intf_thread_t);
224 psz_type = "interface";
226 case VLC_OBJECT_DECODER:
227 i_size = sizeof(decoder_t);
228 psz_type = "decoder";
230 case VLC_OBJECT_PACKETIZER:
231 i_size = sizeof(decoder_t);
232 psz_type = "packetizer";
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 if( p_priv->pipes[1] != -1 && p_priv->pipes[1] != p_priv->pipes[0] )
311 close( p_priv->pipes[1] );
312 if( p_priv->pipes[0] != -1 )
313 close( p_priv->pipes[0] );
314 if( VLC_OBJECT(p_this->p_libvlc) == p_this )
315 vlc_mutex_destroy (&(libvlc_priv ((libvlc_int_t *)p_this)->structure_lock));
321 /** Inter-object signaling */
323 void __vlc_object_lock( vlc_object_t *obj )
325 vlc_mutex_lock( &(vlc_internals(obj)->lock) );
328 void __vlc_object_unlock( vlc_object_t *obj )
330 vlc_assert_locked( &(vlc_internals(obj)->lock) );
331 vlc_mutex_unlock( &(vlc_internals(obj)->lock) );
333 void __vlc_object_assert_locked( vlc_object_t *obj )
335 vlc_assert_locked( &(vlc_internals(obj)->lock) );
339 # include <winsock2.h>
340 # include <ws2tcpip.h>
343 * select()-able pipes emulated using Winsock
345 static int pipe (int fd[2])
348 int addrlen = sizeof (addr);
350 SOCKET l = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP), a,
351 c = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
352 if ((l == INVALID_SOCKET) || (c == INVALID_SOCKET))
355 memset (&addr, 0, sizeof (addr));
356 addr.sin_family = AF_INET;
357 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
358 if (bind (l, (PSOCKADDR)&addr, sizeof (addr))
359 || getsockname (l, (PSOCKADDR)&addr, &addrlen)
361 || connect (c, (PSOCKADDR)&addr, addrlen))
364 a = accept (l, NULL, NULL);
365 if (a == INVALID_SOCKET)
376 if (l != INVALID_SOCKET)
378 if (c != INVALID_SOCKET)
384 #define read( a, b, c ) recv (a, b, c, 0)
386 #define write( a, b, c ) send (a, b, c, 0)
388 #define close( a ) closesocket (a)
392 * Returns the readable end of a pipe that becomes readable once termination
393 * of the object is requested (vlc_object_kill()).
394 * This can be used to wake-up out of a select() or poll() event loop, such
395 * typically when doing network I/O.
397 * Note that the pipe will remain the same for the lifetime of the object.
398 * DO NOT read the pipe nor close it yourself. Ever.
400 * @param obj object that would be "killed"
401 * @return a readable pipe descriptor, or -1 on error.
403 int vlc_object_waitpipe( vlc_object_t *obj )
405 vlc_object_internals_t *internals = vlc_internals( obj );
407 vlc_object_lock (obj);
408 if (internals->pipes[0] == -1)
410 /* This can only ever happen if someone killed us without locking: */
411 assert (internals->pipes[1] == -1);
414 internals->pipes[0] = internals->pipes[1] = eventfd (0, 0);
415 if (internals->pipes[0] == -1)
418 if (pipe (internals->pipes))
419 internals->pipes[0] = internals->pipes[1] = -1;
422 if (internals->pipes[0] != -1 && obj->b_die)
423 { /* Race condition: vlc_object_kill() already invoked! */
424 msg_Dbg (obj, "waitpipe: object already dying");
425 write (internals->pipes[1], &(uint64_t){ 1 }, sizeof (uint64_t));
428 vlc_object_unlock (obj);
429 return internals->pipes[0];
434 * Suspends until another thread calls vlc_object_signal_unlocked().
435 * The thread may be woken up earlier due to limitations of the underlying
438 * In new code, please use vlc_cond_wait() instead.
440 * This function is a cancellation point. In case of cancellation, the object
441 * will be in locked state.
443 void __vlc_object_wait( vlc_object_t *obj )
445 vlc_object_internals_t *priv = vlc_internals( obj );
446 vlc_assert_locked( &priv->lock);
447 vlc_cond_wait( &priv->wait, &priv->lock );
452 * Wakes up one thread waiting on the object. If no thread are (yet) waiting,
455 * Please do not use this function in new code as we are trying to untangle
456 * objects and threads. Use vlc_cond_wait() instead.
458 void __vlc_object_signal_unlocked( vlc_object_t *obj )
460 vlc_assert_locked (&(vlc_internals(obj)->lock));
461 vlc_cond_signal( &(vlc_internals(obj)->wait) );
466 * Requests termination of an object, cancels the object thread, and make the
467 * object wait pipe (if it exists) readable. Not a cancellation point.
469 void __vlc_object_kill( vlc_object_t *p_this )
471 vlc_object_internals_t *priv = vlc_internals( p_this );
474 vlc_thread_cancel( p_this );
475 vlc_object_lock( p_this );
479 p_this->b_die = true;
482 vlc_cond_broadcast (&priv->wait);
483 /* This also serves as a memory barrier toward vlc_object_alive(): */
484 vlc_object_unlock( p_this );
488 int canc = vlc_savecancel ();
490 /* write _after_ setting b_die, so vlc_object_alive() returns false */
491 write (fd, &(uint64_t){ 1 }, sizeof (uint64_t));
492 msg_Dbg (p_this, "waitpipe: object killed");
493 vlc_restorecancel (canc);
498 /*****************************************************************************
499 * find a typed object and increment its refcount
500 *****************************************************************************
501 * This function recursively looks for a given object type. i_mode can be one
502 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
503 *****************************************************************************/
504 void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
506 vlc_object_t *p_found;
508 /* If we are of the requested type ourselves, don't look further */
509 if( !(i_mode & FIND_STRICT)
510 && vlc_internals (p_this)->i_object_type == i_type )
512 vlc_object_hold( p_this );
516 /* Otherwise, recursively look for the object */
517 if ((i_mode & 0x000f) == FIND_ANYWHERE)
518 return vlc_object_find (p_this->p_libvlc, i_type,
519 (i_mode & ~0x000f)|FIND_CHILD);
521 libvlc_lock (p_this->p_libvlc);
522 p_found = FindObject( p_this, i_type, i_mode );
523 libvlc_unlock (p_this->p_libvlc);
527 #undef vlc_object_find_name
529 * Finds a named object and increment its reference count.
530 * Beware that objects found in this manner can be "owned" by another thread,
531 * be of _any_ type, and be attached to any module (if any). With such an
532 * object reference, you can set or get object variables, emit log messages,
533 * and read write-once object parameters (psz_object_type, etc).
534 * You CANNOT cast the object to a more specific object type, and you
535 * definitely cannot invoke object type-specific callbacks with this.
537 * @param p_this object to search from
538 * @param psz_name name of the object to search for
539 * @param i_mode search direction: FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
541 * @return a matching object (must be released by the caller),
544 vlc_object_t *vlc_object_find_name( vlc_object_t *p_this,
545 const char *psz_name, int i_mode )
547 vlc_object_t *p_found;
549 /* If have the requested name ourselves, don't look further */
550 if( !(i_mode & FIND_STRICT)
551 && p_this->psz_object_name
552 && !strcmp( p_this->psz_object_name, psz_name ) )
554 vlc_object_hold( p_this );
558 libvlc_lock (p_this->p_libvlc);
560 /* Otherwise, recursively look for the object */
561 if( (i_mode & 0x000f) == FIND_ANYWHERE )
563 vlc_object_t *p_root = p_this;
566 while( p_root->p_parent != NULL &&
567 p_root != VLC_OBJECT( p_this->p_libvlc ) )
569 p_root = p_root->p_parent;
572 p_found = FindObjectName( p_root, psz_name,
573 (i_mode & ~0x000f)|FIND_CHILD );
574 if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
576 p_found = FindObjectName( VLC_OBJECT( p_this->p_libvlc ),
577 psz_name, (i_mode & ~0x000f)|FIND_CHILD );
582 p_found = FindObjectName( p_this, psz_name, i_mode );
585 libvlc_unlock (p_this->p_libvlc);
590 * Increment an object reference counter.
592 void * __vlc_object_hold( vlc_object_t *p_this )
594 vlc_object_internals_t *internals = vlc_internals( p_this );
596 vlc_spin_lock( &internals->ref_spin );
597 /* Avoid obvious freed object uses */
598 assert( internals->i_refcount > 0 );
599 /* Increment the counter */
600 internals->i_refcount++;
601 vlc_spin_unlock( &internals->ref_spin );
605 /*****************************************************************************
606 * Decrement an object refcount
607 * And destroy the object if its refcount reach zero.
608 *****************************************************************************/
609 void __vlc_object_release( vlc_object_t *p_this )
611 vlc_object_internals_t *internals = vlc_internals( p_this );
612 vlc_object_t *parent = NULL;
613 bool b_should_destroy;
615 vlc_spin_lock( &internals->ref_spin );
616 assert( internals->i_refcount > 0 );
618 if( internals->i_refcount > 1 )
621 /* There are still other references to the object */
622 internals->i_refcount--;
623 vlc_spin_unlock( &internals->ref_spin );
626 vlc_spin_unlock( &internals->ref_spin );
629 /* Remember that we cannot hold the spin while waiting on the mutex */
630 libvlc_lock (p_this->p_libvlc);
631 /* Take the spin again. Note that another thread may have held the
632 * object in the (very short) mean time. */
633 vlc_spin_lock( &internals->ref_spin );
634 b_should_destroy = --internals->i_refcount == 0;
635 vlc_spin_unlock( &internals->ref_spin );
637 if( b_should_destroy )
639 /* We have no children */
640 assert (internals->i_children == 0);
641 parent = p_this->p_parent;
644 if( VLC_OBJECT(p_this->p_libvlc) == p_this )
647 vlc_object_t *leaked = internals->next;
648 while( leaked != p_this )
650 /* We are leaking this object */
652 "ERROR: leaking object (%p, type:%s, name:%s)\n",
653 leaked, leaked->psz_object_type,
654 leaked->psz_object_name );
655 /* Dump object to ease debugging */
656 vlc_object_dump( leaked );
658 leaked = vlc_internals (leaked)->next;
661 if( internals->next != p_this )
662 /* Dump libvlc object to ease debugging */
663 vlc_object_dump( p_this );
666 /* Remove the object from object list
667 * so that it cannot be encountered by vlc_object_get() */
668 vlc_internals (internals->next)->prev = internals->prev;
669 vlc_internals (internals->prev)->next = internals->next;
672 /* Detach from parent to protect against FIND_CHILDREN */
673 vlc_object_detach_unlocked (p_this);
675 libvlc_unlock (p_this->p_libvlc);
677 if( b_should_destroy )
681 canc = vlc_savecancel ();
682 vlc_object_destroy( p_this );
683 vlc_restorecancel (canc);
685 vlc_object_release (parent);
690 ****************************************************************************
691 * attach object to a parent object
692 *****************************************************************************
693 * This function sets p_this as a child of p_parent, and p_parent as a parent
694 * of p_this. This link can be undone using vlc_object_detach.
695 *****************************************************************************/
696 void __vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
698 if( !p_this ) return;
700 vlc_object_hold (p_parent);
701 libvlc_lock (p_this->p_libvlc);
703 /* Attach the parent to its child */
704 assert (!p_this->p_parent);
705 p_this->p_parent = p_parent;
707 /* Attach the child to its parent */
708 vlc_object_internals_t *priv = vlc_internals( p_parent );
709 INSERT_ELEM( priv->pp_children, priv->i_children, priv->i_children,
711 libvlc_unlock (p_this->p_libvlc);
715 static void vlc_object_detach_unlocked (vlc_object_t *p_this)
717 if (p_this->p_parent == NULL)
720 vlc_object_internals_t *priv = vlc_internals( p_this->p_parent );
724 /* Remove p_this's parent */
725 p_this->p_parent = NULL;
727 /* Remove all of p_parent's children which are p_this */
728 for( i_index = priv->i_children ; i_index-- ; )
730 if( priv->pp_children[i_index] == p_this )
733 for( i = i_index ; i < priv->i_children ; i++ )
734 priv->pp_children[i] = priv->pp_children[i+1];
738 if( priv->i_children )
740 vlc_object_t **pp_children = (vlc_object_t **)
741 realloc( priv->pp_children,
742 priv->i_children * sizeof(vlc_object_t *) );
744 priv->pp_children = pp_children;
748 /* Special case - don't realloc() to zero to avoid leaking */
749 free( priv->pp_children );
750 priv->pp_children = NULL;
756 ****************************************************************************
757 * detach object from its parent
758 *****************************************************************************
759 * This function removes all links between an object and its parent.
760 *****************************************************************************/
761 void __vlc_object_detach( vlc_object_t *p_this )
763 vlc_object_t *p_parent;
764 if( !p_this ) return;
766 libvlc_lock (p_this->p_libvlc);
767 p_parent = p_this->p_parent;
769 vlc_object_detach_unlocked( p_this );
770 libvlc_unlock (p_this->p_libvlc);
773 vlc_object_release (p_parent);
778 ****************************************************************************
779 * find a list typed objects and increment their refcount
780 *****************************************************************************
781 * This function recursively looks for a given object type. i_mode can be one
782 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
783 *****************************************************************************/
784 vlc_list_t * vlc_list_find( vlc_object_t *p_this, int i_type, int i_mode )
789 /* Look for the objects */
790 switch( i_mode & 0x000f )
793 return vlc_list_find (p_this->p_libvlc, i_type, FIND_CHILD);
796 libvlc_lock (p_this->p_libvlc);
797 i_count = CountChildren( p_this, i_type );
798 p_list = NewList( i_count );
800 /* Check allocation was successful */
801 if( p_list->i_count != i_count )
803 libvlc_unlock (p_this->p_libvlc);
809 ListChildren( p_list, p_this, i_type );
810 libvlc_unlock (p_this->p_libvlc);
814 msg_Err( p_this, "unimplemented!" );
815 p_list = NewList( 0 );
823 * Gets the list of children of an objects, and increment their reference
825 * @return a list (possibly empty) or NULL in case of error.
827 vlc_list_t *__vlc_list_children( vlc_object_t *obj )
830 vlc_object_internals_t *priv = vlc_internals( obj );
832 libvlc_lock (obj->p_libvlc);
833 l = NewList( priv->i_children );
834 for (int i = 0; i < l->i_count; i++)
836 vlc_object_hold( priv->pp_children[i] );
837 l->p_values[i].p_object = priv->pp_children[i];
839 libvlc_unlock (obj->p_libvlc);
843 /*****************************************************************************
844 * DumpCommand: print the current vlc structure
845 *****************************************************************************
846 * This function prints either an ASCII tree showing the connections between
847 * vlc objects, and additional information such as their refcount, thread ID,
848 * etc. (command "tree"), or the same data as a simple list (command "list").
849 *****************************************************************************/
850 static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
851 vlc_value_t oldval, vlc_value_t newval, void *p_data )
853 libvlc_int_t *p_libvlc = p_this->p_libvlc;
855 (void)oldval; (void)p_data;
856 if( *psz_cmd == 'l' )
858 vlc_object_t *cur = VLC_OBJECT (p_libvlc);
860 libvlc_lock (p_this->p_libvlc);
863 PrintObject (cur, "");
864 cur = vlc_internals (cur)->next;
866 while (cur != VLC_OBJECT(p_libvlc));
867 libvlc_unlock (p_this->p_libvlc);
871 vlc_object_t *p_object = NULL;
873 if( *newval.psz_string )
875 /* try using the object's name to find it */
876 p_object = vlc_object_find_name( p_this, newval.psz_string,
884 libvlc_lock (p_this->p_libvlc);
885 if( *psz_cmd == 't' )
887 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
890 p_object = VLC_OBJECT(p_this->p_libvlc);
893 DumpStructure( p_object, 0, psz_foo );
895 else if( *psz_cmd == 'v' )
900 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
902 PrintObject( p_object, "" );
904 if( !vlc_internals( p_object )->i_vars )
905 printf( " `-o No variables\n" );
906 for( i = 0; i < vlc_internals( p_object )->i_vars; i++ )
908 variable_t *p_var = vlc_internals( p_object )->p_vars + i;
910 const char *psz_type = "unknown";
911 switch( p_var->i_type & VLC_VAR_TYPE )
913 #define MYCASE( type, nice ) \
914 case VLC_VAR_ ## type: \
917 MYCASE( VOID, "void" );
918 MYCASE( BOOL, "bool" );
919 MYCASE( INTEGER, "integer" );
920 MYCASE( HOTKEY, "hotkey" );
921 MYCASE( STRING, "string" );
922 MYCASE( MODULE, "module" );
923 MYCASE( FILE, "file" );
924 MYCASE( DIRECTORY, "directory" );
925 MYCASE( VARIABLE, "variable" );
926 MYCASE( FLOAT, "float" );
927 MYCASE( TIME, "time" );
928 MYCASE( ADDRESS, "address" );
929 MYCASE( MUTEX, "mutex" );
930 MYCASE( LIST, "list" );
933 printf( " %c-o \"%s\" (%s",
934 i + 1 == vlc_internals( p_object )->i_vars ? '`' : '|',
935 p_var->psz_name, psz_type );
936 if( p_var->psz_text )
937 printf( ", %s", p_var->psz_text );
939 if( p_var->i_type & VLC_VAR_HASCHOICE )
940 printf( ", has choices" );
941 if( p_var->i_type & VLC_VAR_ISCOMMAND )
942 printf( ", command" );
943 if( p_var->i_entries )
944 printf( ", %d callbacks", p_var->i_entries );
945 switch( p_var->i_type & VLC_VAR_CLASS )
951 printf( ": %s", p_var->val.b_bool ? "true" : "false" );
953 case VLC_VAR_INTEGER:
954 printf( ": %d", p_var->val.i_int );
957 printf( ": \"%s\"", p_var->val.psz_string );
960 printf( ": %f", p_var->val.f_float );
963 printf( ": %"PRIi64, (int64_t)p_var->val.i_time );
965 case VLC_VAR_ADDRESS:
966 printf( ": %p", p_var->val.p_address );
975 libvlc_unlock (p_this->p_libvlc);
977 if( *newval.psz_string )
979 vlc_object_release( p_object );
986 /*****************************************************************************
987 * vlc_list_release: free a list previously allocated by vlc_list_find
988 *****************************************************************************
989 * This function decreases the refcount of all objects in the list and
991 *****************************************************************************/
992 void vlc_list_release( vlc_list_t *p_list )
996 for( i_index = 0; i_index < p_list->i_count; i_index++ )
998 vlc_object_release( p_list->p_values[i_index].p_object );
1001 free( p_list->p_values );
1005 /*****************************************************************************
1006 * dump an object. (Debug function)
1007 *****************************************************************************/
1009 static void vlc_object_dump( vlc_object_t *p_this )
1011 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
1014 DumpStructure( p_this, 0, psz_foo );
1018 /* Following functions are local */
1020 static vlc_object_t * FindObject( vlc_object_t *p_this, int i_type, int i_mode )
1023 vlc_object_t *p_tmp;
1025 switch( i_mode & 0x000f )
1028 p_tmp = p_this->p_parent;
1031 if( vlc_internals( p_tmp )->i_object_type == i_type )
1033 vlc_object_hold( p_tmp );
1038 return FindObject( p_tmp, i_type, i_mode );
1044 for( i = vlc_internals( p_this )->i_children; i--; )
1046 p_tmp = vlc_internals( p_this )->pp_children[i];
1047 if( vlc_internals( p_tmp )->i_object_type == i_type )
1049 vlc_object_hold( p_tmp );
1052 else if( vlc_internals( p_tmp )->i_children )
1054 p_tmp = FindObject( p_tmp, i_type, i_mode );
1064 /* Handled in vlc_object_find */
1071 static vlc_object_t * FindObjectName( vlc_object_t *p_this,
1072 const char *psz_name,
1076 vlc_object_t *p_tmp;
1078 switch( i_mode & 0x000f )
1081 p_tmp = p_this->p_parent;
1084 if( p_tmp->psz_object_name
1085 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1087 vlc_object_hold( p_tmp );
1092 return FindObjectName( p_tmp, psz_name, i_mode );
1098 for( i = vlc_internals( p_this )->i_children; i--; )
1100 p_tmp = vlc_internals( p_this )->pp_children[i];
1101 if( p_tmp->psz_object_name
1102 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1104 vlc_object_hold( p_tmp );
1107 else if( vlc_internals( p_tmp )->i_children )
1109 p_tmp = FindObjectName( p_tmp, psz_name, i_mode );
1119 /* Handled in vlc_object_find */
1127 static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
1129 char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
1132 int canc = vlc_savecancel ();
1133 memset( &psz_name, 0, sizeof(psz_name) );
1134 if( p_this->psz_object_name )
1136 snprintf( psz_name, 49, " \"%s\"", p_this->psz_object_name );
1138 psz_name[48] = '\"';
1141 psz_children[0] = '\0';
1142 switch( vlc_internals( p_this )->i_children )
1147 strcpy( psz_children, ", 1 child" );
1150 snprintf( psz_children, 19, ", %i children",
1151 vlc_internals( p_this )->i_children );
1155 psz_refcount[0] = '\0';
1156 if( vlc_internals( p_this )->i_refcount > 0 )
1157 snprintf( psz_refcount, 19, ", refcount %u",
1158 vlc_internals( p_this )->i_refcount );
1160 psz_thread[0] = '\0';
1161 if( vlc_internals( p_this )->b_thread )
1162 snprintf( psz_thread, 29, " (thread %lu)",
1163 (unsigned long)vlc_internals( p_this )->thread_id );
1165 psz_parent[0] = '\0';
1166 if( p_this->p_parent )
1167 snprintf( psz_parent, 19, ", parent %p", p_this->p_parent );
1169 printf( " %so %p %s%s%s%s%s%s\n", psz_prefix,
1170 p_this, p_this->psz_object_type,
1171 psz_name, psz_thread, psz_refcount, psz_children,
1173 vlc_restorecancel (canc);
1176 static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
1179 char i_back = psz_foo[i_level];
1180 psz_foo[i_level] = '\0';
1182 PrintObject( p_this, psz_foo );
1184 psz_foo[i_level] = i_back;
1186 if( i_level / 2 >= MAX_DUMPSTRUCTURE_DEPTH )
1188 msg_Warn( p_this, "structure tree is too deep" );
1192 for( i = 0 ; i < vlc_internals( p_this )->i_children ; i++ )
1196 psz_foo[i_level-1] = ' ';
1198 if( psz_foo[i_level-2] == '`' )
1200 psz_foo[i_level-2] = ' ';
1204 if( i == vlc_internals( p_this )->i_children - 1 )
1206 psz_foo[i_level] = '`';
1210 psz_foo[i_level] = '|';
1213 psz_foo[i_level+1] = '-';
1214 psz_foo[i_level+2] = '\0';
1216 DumpStructure( vlc_internals( p_this )->pp_children[i], i_level + 2,
1221 static vlc_list_t * NewList( int i_count )
1223 vlc_list_t * p_list = (vlc_list_t *)malloc( sizeof( vlc_list_t ) );
1224 if( p_list == NULL )
1229 p_list->i_count = i_count;
1233 p_list->p_values = NULL;
1237 p_list->p_values = malloc( i_count * sizeof( vlc_value_t ) );
1238 if( p_list->p_values == NULL )
1240 p_list->i_count = 0;
1247 static void ListReplace( vlc_list_t *p_list, vlc_object_t *p_object,
1250 if( p_list == NULL || i_index >= p_list->i_count )
1255 vlc_object_hold( p_object );
1257 p_list->p_values[i_index].p_object = p_object;
1262 /*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
1264 if( p_list == NULL )
1269 p_list->p_values = realloc( p_list->p_values, (p_list->i_count + 1)
1270 * sizeof( vlc_value_t ) );
1271 if( p_list->p_values == NULL )
1273 p_list->i_count = 0;
1277 vlc_object_hold( p_object );
1279 p_list->p_values[p_list->i_count].p_object = p_object;
1285 static int CountChildren( vlc_object_t *p_this, int i_type )
1287 vlc_object_t *p_tmp;
1290 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1292 p_tmp = vlc_internals( p_this )->pp_children[i];
1294 if( vlc_internals( p_tmp )->i_object_type == i_type )
1298 i_count += CountChildren( p_tmp, i_type );
1304 static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
1306 vlc_object_t *p_tmp;
1309 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1311 p_tmp = vlc_internals( p_this )->pp_children[i];
1313 if( vlc_internals( p_tmp )->i_object_type == i_type )
1314 ListReplace( p_list, p_tmp, p_list->i_count++ );
1316 ListChildren( p_list, p_tmp, i_type );