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>
40 #include <vlc_memory.h>
42 #include "../libvlc.h"
44 #include "audio_output/aout_internal.h"
46 #include "vlc_interface.h"
47 #include "vlc_codec.h"
49 #include "variables.h"
55 # include <errno.h> /* ENOSYS */
61 #if defined (HAVE_SYS_EVENTFD_H)
62 # include <sys/eventfd.h>
66 /*****************************************************************************
68 *****************************************************************************/
69 static int DumpCommand( vlc_object_t *, char const *,
70 vlc_value_t, vlc_value_t, void * );
72 static vlc_object_t * FindObject ( vlc_object_t *, int, int );
73 static vlc_object_t * FindObjectName( vlc_object_t *, const char *, int );
74 static void PrintObject ( vlc_object_t *, const char * );
75 static void DumpStructure ( vlc_object_t *, int, char * );
77 static vlc_list_t * NewList ( int );
78 static void ListReplace ( vlc_list_t *, vlc_object_t *, int );
79 /*static void ListAppend ( vlc_list_t *, vlc_object_t * );*/
80 static int CountChildren ( vlc_object_t *, int );
81 static void ListChildren ( vlc_list_t *, vlc_object_t *, int );
83 static void vlc_object_destroy( vlc_object_t *p_this );
84 static void vlc_object_detach_unlocked (vlc_object_t *p_this);
86 /*****************************************************************************
87 * Local structure lock
88 *****************************************************************************/
89 static void libvlc_lock (libvlc_int_t *p_libvlc)
91 vlc_mutex_lock (&(libvlc_priv (p_libvlc)->structure_lock));
94 static void libvlc_unlock (libvlc_int_t *p_libvlc)
96 vlc_mutex_unlock (&(libvlc_priv (p_libvlc)->structure_lock));
99 void *__vlc_custom_create( vlc_object_t *p_this, size_t i_size,
100 int i_type, const char *psz_type )
103 vlc_object_internals_t *p_priv;
106 * VLC objects are laid out as follow:
107 * - first the LibVLC-private per-object data,
108 * - then VLC_COMMON members from vlc_object_t,
109 * - finally, the type-specific data (if any).
111 * This function initializes the LibVLC and common data,
112 * and zeroes the rest.
114 p_priv = calloc( 1, sizeof( *p_priv ) + i_size );
118 assert (i_size >= sizeof (vlc_object_t));
119 p_new = (vlc_object_t *)(p_priv + 1);
121 p_priv->i_object_type = i_type;
122 p_new->psz_object_type = psz_type;
123 p_priv->psz_name = NULL;
125 p_new->b_die = false;
126 p_new->b_error = false;
127 p_new->b_force = false;
129 p_new->psz_header = NULL;
132 p_new->i_flags = p_this->i_flags
133 & (OBJECT_FLAGS_NODBG|OBJECT_FLAGS_QUIET|OBJECT_FLAGS_NOINTERACT);
135 p_priv->p_vars = calloc( 16, sizeof( variable_t ) );
137 if( !p_priv->p_vars )
145 libvlc_int_t *self = (libvlc_int_t*)p_new;
146 p_new->p_libvlc = self;
147 vlc_mutex_init (&(libvlc_priv (self)->structure_lock));
151 p_new->p_libvlc = p_this->p_libvlc;
153 vlc_spin_init( &p_priv->ref_spin );
154 p_priv->i_refcount = 1;
155 p_priv->pf_destructor = NULL;
156 p_priv->b_thread = false;
157 p_new->p_parent = NULL;
158 p_priv->pp_children = NULL;
159 p_priv->i_children = 0;
161 /* Initialize mutexes and condvars */
162 vlc_mutex_init( &p_priv->var_lock );
163 vlc_cond_init( &p_priv->var_wait );
164 p_priv->pipes[0] = p_priv->pipes[1] = -1;
166 if (p_new == VLC_OBJECT(p_new->p_libvlc))
167 { /* TODO: should be in src/libvlc.c */
168 int canc = vlc_savecancel ();
169 var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
170 var_AddCallback( p_new, "tree", DumpCommand, NULL );
171 var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
172 var_AddCallback( p_new, "vars", DumpCommand, NULL );
173 vlc_restorecancel (canc);
181 * Allocates and initializes a vlc object.
183 * @param i_type known object type (all of them are negative integer values),
184 * or object byte size (always positive).
186 * @return the new object, or NULL on error.
188 void * __vlc_object_create( vlc_object_t *p_this, int i_type )
190 const char * psz_type;
195 case VLC_OBJECT_DECODER:
196 i_size = sizeof(decoder_t);
197 psz_type = "decoder";
199 case VLC_OBJECT_AOUT:
200 i_size = sizeof(aout_instance_t);
201 psz_type = "audio output";
204 assert( i_type > 0 ); /* unknown type?! */
206 i_type = VLC_OBJECT_GENERIC;
207 psz_type = "generic";
211 return vlc_custom_create( p_this, i_size, i_type, psz_type );
216 ****************************************************************************
217 * Set the destructor of a vlc object
219 * This function sets the destructor of the vlc object. It will be called
220 * when the object is destroyed when the its refcount reaches 0.
221 * (It is called by the internal function vlc_object_destroy())
222 *****************************************************************************/
223 void __vlc_object_set_destructor( vlc_object_t *p_this,
224 vlc_destructor_t pf_destructor )
226 vlc_object_internals_t *p_priv = vlc_internals(p_this );
228 vlc_spin_lock( &p_priv->ref_spin );
229 p_priv->pf_destructor = pf_destructor;
230 vlc_spin_unlock( &p_priv->ref_spin );
233 static vlc_mutex_t name_lock = VLC_STATIC_MUTEX;
235 #undef vlc_object_set_name
236 int vlc_object_set_name(vlc_object_t *obj, const char *name)
238 vlc_object_internals_t *priv = vlc_internals(obj);
239 char *newname = name ? strdup (name) : NULL;
242 vlc_mutex_lock (&name_lock);
243 oldname = priv->psz_name;
244 priv->psz_name = newname;
245 vlc_mutex_unlock (&name_lock);
248 return (priv->psz_name || !name) ? VLC_SUCCESS : VLC_ENOMEM;
251 #undef vlc_object_get_name
252 char *vlc_object_get_name(const vlc_object_t *obj)
254 vlc_object_internals_t *priv = vlc_internals(obj);
257 vlc_mutex_lock (&name_lock);
258 name = priv->psz_name ? strdup (priv->psz_name) : NULL;
259 vlc_mutex_unlock (&name_lock);
265 ****************************************************************************
266 * Destroy a vlc object (Internal)
268 * This function destroys an object that has been previously allocated with
269 * vlc_object_create. The object's refcount must be zero and it must not be
270 * attached to other objects in any way.
272 * This function must be called with cancellation disabled (currently).
273 *****************************************************************************/
274 static void vlc_object_destroy( vlc_object_t *p_this )
276 vlc_object_internals_t *p_priv = vlc_internals( p_this );
278 /* Objects are always detached beforehand */
279 assert( !p_this->p_parent );
281 /* Send a kill to the object's thread if applicable */
282 vlc_object_kill( p_this );
284 /* Call the custom "subclass" destructor */
285 if( p_priv->pf_destructor )
286 p_priv->pf_destructor( p_this );
288 /* Any thread must have been cleaned up at this point. */
289 assert( !p_priv->b_thread );
291 /* Destroy the associated variables, starting from the end so that
292 * no memmove calls have to be done. */
293 while( p_priv->i_vars )
295 var_Destroy( p_this, p_priv->p_vars[p_priv->i_vars - 1].psz_name );
298 free( p_priv->p_vars );
299 vlc_cond_destroy( &p_priv->var_wait );
300 vlc_mutex_destroy( &p_priv->var_lock );
302 free( p_this->psz_header );
304 free( p_priv->psz_name );
306 vlc_spin_destroy( &p_priv->ref_spin );
307 if( p_priv->pipes[1] != -1 && p_priv->pipes[1] != p_priv->pipes[0] )
308 close( p_priv->pipes[1] );
309 if( p_priv->pipes[0] != -1 )
310 close( p_priv->pipes[0] );
311 if( VLC_OBJECT(p_this->p_libvlc) == p_this )
312 vlc_mutex_destroy (&(libvlc_priv ((libvlc_int_t *)p_this)->structure_lock));
319 # include <winsock2.h>
320 # include <ws2tcpip.h>
323 * select()-able pipes emulated using Winsock
325 static int pipe (int fd[2])
328 int addrlen = sizeof (addr);
330 SOCKET l = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP), a,
331 c = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
332 if ((l == INVALID_SOCKET) || (c == INVALID_SOCKET))
335 memset (&addr, 0, sizeof (addr));
336 addr.sin_family = AF_INET;
337 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
338 if (bind (l, (PSOCKADDR)&addr, sizeof (addr))
339 || getsockname (l, (PSOCKADDR)&addr, &addrlen)
341 || connect (c, (PSOCKADDR)&addr, addrlen))
344 a = accept (l, NULL, NULL);
345 if (a == INVALID_SOCKET)
356 if (l != INVALID_SOCKET)
358 if (c != INVALID_SOCKET)
364 #define read( a, b, c ) recv (a, b, c, 0)
366 #define write( a, b, c ) send (a, b, c, 0)
368 #define close( a ) closesocket (a)
371 static vlc_mutex_t pipe_lock = VLC_STATIC_MUTEX;
374 * Returns the readable end of a pipe that becomes readable once termination
375 * of the object is requested (vlc_object_kill()).
376 * This can be used to wake-up out of a select() or poll() event loop, such
377 * typically when doing network I/O.
379 * Note that the pipe will remain the same for the lifetime of the object.
380 * DO NOT read the pipe nor close it yourself. Ever.
382 * @param obj object that would be "killed"
383 * @return a readable pipe descriptor, or -1 on error.
385 int vlc_object_waitpipe( vlc_object_t *obj )
387 vlc_object_internals_t *internals = vlc_internals( obj );
389 vlc_mutex_lock (&pipe_lock);
390 if (internals->pipes[0] == -1)
392 /* This can only ever happen if someone killed us without locking: */
393 assert (internals->pipes[1] == -1);
395 #if defined (HAVE_SYS_EVENTFD_H)
396 internals->pipes[0] = internals->pipes[1] = eventfd (0, 0);
397 if (internals->pipes[0] == -1)
400 if (pipe (internals->pipes))
401 internals->pipes[0] = internals->pipes[1] = -1;
404 if (internals->pipes[0] != -1 && obj->b_die)
405 { /* Race condition: vlc_object_kill() already invoked! */
406 msg_Dbg (obj, "waitpipe: object already dying");
407 write (internals->pipes[1], &(uint64_t){ 1 }, sizeof (uint64_t));
410 vlc_mutex_unlock (&pipe_lock);
411 return internals->pipes[0];
416 * Requests termination of an object, cancels the object thread, and make the
417 * object wait pipe (if it exists) readable. Not a cancellation point.
419 void __vlc_object_kill( vlc_object_t *p_this )
421 vlc_object_internals_t *priv = vlc_internals( p_this );
424 vlc_thread_cancel( p_this );
425 vlc_mutex_lock( &pipe_lock );
429 p_this->b_die = true;
432 /* This also serves as a memory barrier toward vlc_object_alive(): */
433 vlc_mutex_unlock( &pipe_lock );
437 int canc = vlc_savecancel ();
439 /* write _after_ setting b_die, so vlc_object_alive() returns false */
440 write (fd, &(uint64_t){ 1 }, sizeof (uint64_t));
441 msg_Dbg (p_this, "waitpipe: object killed");
442 vlc_restorecancel (canc);
447 /*****************************************************************************
448 * find a typed object and increment its refcount
449 *****************************************************************************
450 * This function recursively looks for a given object type. i_mode can be one
451 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
452 *****************************************************************************/
453 void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
455 vlc_object_t *p_found;
457 /* If we are of the requested type ourselves, don't look further */
458 if( !(i_mode & FIND_STRICT)
459 && vlc_internals (p_this)->i_object_type == i_type )
461 vlc_object_hold( p_this );
465 /* Otherwise, recursively look for the object */
466 if ((i_mode & 0x000f) == FIND_ANYWHERE)
467 return vlc_object_find (p_this->p_libvlc, i_type,
468 (i_mode & ~0x000f)|FIND_CHILD);
470 libvlc_lock (p_this->p_libvlc);
471 p_found = FindObject( p_this, i_type, i_mode );
472 libvlc_unlock (p_this->p_libvlc);
477 static int objnamecmp(const vlc_object_t *obj, const char *name)
479 char *objname = vlc_object_get_name(obj);
483 int ret = strcmp (objname, name);
488 #undef vlc_object_find_name
490 * Finds a named object and increment its reference count.
491 * Beware that objects found in this manner can be "owned" by another thread,
492 * be of _any_ type, and be attached to any module (if any). With such an
493 * object reference, you can set or get object variables, emit log messages,
494 * and read write-once object parameters (psz_object_type, etc).
495 * You CANNOT cast the object to a more specific object type, and you
496 * definitely cannot invoke object type-specific callbacks with this.
498 * @param p_this object to search from
499 * @param psz_name name of the object to search for
500 * @param i_mode search direction: FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
502 * @return a matching object (must be released by the caller),
505 vlc_object_t *vlc_object_find_name( vlc_object_t *p_this,
506 const char *psz_name, int i_mode )
508 vlc_object_t *p_found;
510 /* Reading psz_object_name from a separate inhibits thread-safety.
511 * Use a libvlc address variable instead for that sort of things! */
512 msg_Warn( p_this, "%s(%s) is not safe!", __func__, psz_name );
513 /* If have the requested name ourselves, don't look further */
514 if( !(i_mode & FIND_STRICT) && !objnamecmp(p_this, psz_name) )
516 vlc_object_hold( p_this );
520 libvlc_lock (p_this->p_libvlc);
522 /* Otherwise, recursively look for the object */
523 if( (i_mode & 0x000f) == FIND_ANYWHERE )
525 vlc_object_t *p_root = p_this;
528 while( p_root->p_parent != NULL &&
529 p_root != VLC_OBJECT( p_this->p_libvlc ) )
531 p_root = p_root->p_parent;
534 p_found = FindObjectName( p_root, psz_name,
535 (i_mode & ~0x000f)|FIND_CHILD );
536 if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
538 p_found = FindObjectName( VLC_OBJECT( p_this->p_libvlc ),
539 psz_name, (i_mode & ~0x000f)|FIND_CHILD );
544 p_found = FindObjectName( p_this, psz_name, i_mode );
547 libvlc_unlock (p_this->p_libvlc);
552 * Increment an object reference counter.
554 void * __vlc_object_hold( vlc_object_t *p_this )
556 vlc_object_internals_t *internals = vlc_internals( p_this );
558 vlc_spin_lock( &internals->ref_spin );
559 /* Avoid obvious freed object uses */
560 assert( internals->i_refcount > 0 );
561 /* Increment the counter */
562 internals->i_refcount++;
563 vlc_spin_unlock( &internals->ref_spin );
567 /*****************************************************************************
568 * Decrement an object refcount
569 * And destroy the object if its refcount reach zero.
570 *****************************************************************************/
571 void __vlc_object_release( vlc_object_t *p_this )
573 vlc_object_internals_t *internals = vlc_internals( p_this );
574 vlc_object_t *parent = NULL;
575 bool b_should_destroy;
577 vlc_spin_lock( &internals->ref_spin );
578 assert( internals->i_refcount > 0 );
580 if( internals->i_refcount > 1 )
583 /* There are still other references to the object */
584 internals->i_refcount--;
585 vlc_spin_unlock( &internals->ref_spin );
588 vlc_spin_unlock( &internals->ref_spin );
591 /* Remember that we cannot hold the spin while waiting on the mutex */
592 libvlc_lock (p_this->p_libvlc);
593 /* Take the spin again. Note that another thread may have held the
594 * object in the (very short) mean time. */
595 vlc_spin_lock( &internals->ref_spin );
596 b_should_destroy = --internals->i_refcount == 0;
597 vlc_spin_unlock( &internals->ref_spin );
599 if( b_should_destroy )
601 parent = p_this->p_parent;
603 /* Detach from parent to protect against FIND_CHILDREN */
604 vlc_object_detach_unlocked (p_this);
606 /* We have no children */
607 assert (internals->i_children == 0);
609 libvlc_unlock (p_this->p_libvlc);
611 if( b_should_destroy )
615 canc = vlc_savecancel ();
616 vlc_object_destroy( p_this );
617 vlc_restorecancel (canc);
619 vlc_object_release (parent);
624 ****************************************************************************
625 * attach object to a parent object
626 *****************************************************************************
627 * This function sets p_this as a child of p_parent, and p_parent as a parent
628 * of p_this. This link can be undone using vlc_object_detach.
629 *****************************************************************************/
630 void __vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
632 if( !p_this ) return;
634 vlc_object_hold (p_parent);
635 libvlc_lock (p_this->p_libvlc);
637 /* Attach the parent to its child */
638 assert (!p_this->p_parent);
639 p_this->p_parent = p_parent;
641 /* Attach the child to its parent */
642 vlc_object_internals_t *priv = vlc_internals( p_parent );
643 INSERT_ELEM( priv->pp_children, priv->i_children, priv->i_children,
645 libvlc_unlock (p_this->p_libvlc);
649 static void vlc_object_detach_unlocked (vlc_object_t *p_this)
651 if (p_this->p_parent == NULL)
654 vlc_object_internals_t *priv = vlc_internals( p_this->p_parent );
658 /* Remove p_this's parent */
659 p_this->p_parent = NULL;
661 /* Remove all of p_parent's children which are p_this */
662 for( i_index = priv->i_children ; i_index-- ; )
664 if( priv->pp_children[i_index] == p_this )
667 for( i = i_index ; i < priv->i_children ; i++ )
668 priv->pp_children[i] = priv->pp_children[i+1];
672 if( priv->i_children )
674 vlc_object_t **pp_children = (vlc_object_t **)
675 realloc( priv->pp_children,
676 priv->i_children * sizeof(vlc_object_t *) );
678 priv->pp_children = pp_children;
682 /* Special case - don't realloc() to zero to avoid leaking */
683 free( priv->pp_children );
684 priv->pp_children = NULL;
690 ****************************************************************************
691 * detach object from its parent
692 *****************************************************************************
693 * This function removes all links between an object and its parent.
694 *****************************************************************************/
695 void __vlc_object_detach( vlc_object_t *p_this )
697 vlc_object_t *p_parent;
698 if( !p_this ) return;
700 libvlc_lock (p_this->p_libvlc);
701 p_parent = p_this->p_parent;
703 vlc_object_detach_unlocked( p_this );
704 libvlc_unlock (p_this->p_libvlc);
707 vlc_object_release (p_parent);
712 ****************************************************************************
713 * find a list typed objects and increment their refcount
714 *****************************************************************************
715 * This function recursively looks for a given object type. i_mode can be one
716 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
717 *****************************************************************************/
718 vlc_list_t * vlc_list_find( vlc_object_t *p_this, int i_type, int i_mode )
723 /* Look for the objects */
724 switch( i_mode & 0x000f )
727 return vlc_list_find (VLC_OBJECT(p_this->p_libvlc), i_type, FIND_CHILD);
730 libvlc_lock (p_this->p_libvlc);
731 i_count = CountChildren( p_this, i_type );
732 p_list = NewList( i_count );
734 /* Check allocation was successful */
735 if( p_list->i_count != i_count )
737 libvlc_unlock (p_this->p_libvlc);
743 ListChildren( p_list, p_this, i_type );
744 libvlc_unlock (p_this->p_libvlc);
748 msg_Err( p_this, "unimplemented!" );
749 p_list = NewList( 0 );
757 * Gets the list of children of an objects, and increment their reference
759 * @return a list (possibly empty) or NULL in case of error.
761 vlc_list_t *__vlc_list_children( vlc_object_t *obj )
764 vlc_object_internals_t *priv = vlc_internals( obj );
766 libvlc_lock (obj->p_libvlc);
767 l = NewList( priv->i_children );
768 for (int i = 0; i < l->i_count; i++)
770 vlc_object_hold( priv->pp_children[i] );
771 l->p_values[i].p_object = priv->pp_children[i];
773 libvlc_unlock (obj->p_libvlc);
777 /*****************************************************************************
778 * DumpCommand: print the current vlc structure
779 *****************************************************************************
780 * This function prints either an ASCII tree showing the connections between
781 * vlc objects, and additional information such as their refcount, thread ID,
782 * etc. (command "tree"), or the same data as a simple list (command "list").
783 *****************************************************************************/
784 static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
785 vlc_value_t oldval, vlc_value_t newval, void *p_data )
787 (void)oldval; (void)p_data;
788 vlc_object_t *p_object = NULL;
790 if( *newval.psz_string )
792 /* try using the object's name to find it */
793 p_object = vlc_object_find_name( p_this, newval.psz_string,
801 libvlc_lock (p_this->p_libvlc);
802 if( *psz_cmd == 't' )
804 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
807 p_object = VLC_OBJECT(p_this->p_libvlc);
810 DumpStructure( p_object, 0, psz_foo );
812 else if( *psz_cmd == 'v' )
817 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
819 PrintObject( p_object, "" );
821 vlc_mutex_lock( &vlc_internals( p_object )->var_lock );
822 if( !vlc_internals( p_object )->i_vars )
823 printf( " `-o No variables\n" );
824 for( i = 0; i < vlc_internals( p_object )->i_vars; i++ )
826 variable_t *p_var = vlc_internals( p_object )->p_vars + i;
827 const char *psz_type = "unknown";
829 switch( p_var->i_type & VLC_VAR_TYPE )
831 #define MYCASE( type, nice ) \
832 case VLC_VAR_ ## type: \
835 MYCASE( VOID, "void" );
836 MYCASE( BOOL, "bool" );
837 MYCASE( INTEGER, "integer" );
838 MYCASE( HOTKEY, "hotkey" );
839 MYCASE( STRING, "string" );
840 MYCASE( MODULE, "module" );
841 MYCASE( FILE, "file" );
842 MYCASE( DIRECTORY, "directory" );
843 MYCASE( VARIABLE, "variable" );
844 MYCASE( FLOAT, "float" );
845 MYCASE( TIME, "time" );
846 MYCASE( ADDRESS, "address" );
847 MYCASE( MUTEX, "mutex" );
848 MYCASE( LIST, "list" );
851 printf( " %c-o \"%s\" (%s",
852 i + 1 == vlc_internals( p_object )->i_vars ? '`' : '|',
853 p_var->psz_name, psz_type );
854 if( p_var->psz_text )
855 printf( ", %s", p_var->psz_text );
857 if( p_var->i_type & VLC_VAR_HASCHOICE )
858 printf( ", has choices" );
859 if( p_var->i_type & VLC_VAR_ISCOMMAND )
860 printf( ", command" );
861 if( p_var->i_entries )
862 printf( ", %d callbacks", p_var->i_entries );
863 switch( p_var->i_type & VLC_VAR_CLASS )
869 printf( ": %s", p_var->val.b_bool ? "true" : "false" );
871 case VLC_VAR_INTEGER:
872 printf( ": %d", p_var->val.i_int );
875 printf( ": \"%s\"", p_var->val.psz_string );
878 printf( ": %f", p_var->val.f_float );
881 printf( ": %"PRIi64, (int64_t)p_var->val.i_time );
883 case VLC_VAR_ADDRESS:
884 printf( ": %p", p_var->val.p_address );
892 vlc_mutex_unlock( &vlc_internals( p_object )->var_lock );
894 libvlc_unlock (p_this->p_libvlc);
896 if( *newval.psz_string )
898 vlc_object_release( p_object );
903 /*****************************************************************************
904 * vlc_list_release: free a list previously allocated by vlc_list_find
905 *****************************************************************************
906 * This function decreases the refcount of all objects in the list and
908 *****************************************************************************/
909 void vlc_list_release( vlc_list_t *p_list )
913 for( i_index = 0; i_index < p_list->i_count; i_index++ )
915 vlc_object_release( p_list->p_values[i_index].p_object );
918 free( p_list->p_values );
922 /* Following functions are local */
924 static vlc_object_t * FindObject( vlc_object_t *p_this, int i_type, int i_mode )
929 switch( i_mode & 0x000f )
932 p_tmp = p_this->p_parent;
935 if( vlc_internals( p_tmp )->i_object_type == i_type )
937 vlc_object_hold( p_tmp );
942 return FindObject( p_tmp, i_type, i_mode );
948 for( i = vlc_internals( p_this )->i_children; i--; )
950 p_tmp = vlc_internals( p_this )->pp_children[i];
951 if( vlc_internals( p_tmp )->i_object_type == i_type )
953 vlc_object_hold( p_tmp );
956 else if( vlc_internals( p_tmp )->i_children )
958 p_tmp = FindObject( p_tmp, i_type, i_mode );
968 /* Handled in vlc_object_find */
975 static vlc_object_t * FindObjectName( vlc_object_t *p_this,
976 const char *psz_name,
982 switch( i_mode & 0x000f )
985 p_tmp = p_this->p_parent;
988 if( !objnamecmp(p_tmp, psz_name) )
990 vlc_object_hold( p_tmp );
995 return FindObjectName( p_tmp, psz_name, i_mode );
1001 for( i = vlc_internals( p_this )->i_children; i--; )
1003 p_tmp = vlc_internals( p_this )->pp_children[i];
1004 if( !objnamecmp(p_tmp, psz_name ) )
1006 vlc_object_hold( p_tmp );
1009 else if( vlc_internals( p_tmp )->i_children )
1011 p_tmp = FindObjectName( p_tmp, psz_name, i_mode );
1021 /* Handled in vlc_object_find */
1029 static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
1031 char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
1034 int canc = vlc_savecancel ();
1035 memset( &psz_name, 0, sizeof(psz_name) );
1036 char *name = vlc_object_get_name(p_this);
1039 snprintf( psz_name, 49, " \"%s\"", name );
1042 psz_name[48] = '\"';
1045 psz_children[0] = '\0';
1046 switch( vlc_internals( p_this )->i_children )
1051 strcpy( psz_children, ", 1 child" );
1054 snprintf( psz_children, 19, ", %i children",
1055 vlc_internals( p_this )->i_children );
1059 psz_refcount[0] = '\0';
1060 if( vlc_internals( p_this )->i_refcount > 0 )
1061 snprintf( psz_refcount, 19, ", refcount %u",
1062 vlc_internals( p_this )->i_refcount );
1064 psz_thread[0] = '\0';
1065 if( vlc_internals( p_this )->b_thread )
1066 snprintf( psz_thread, 29, " (thread %lu)",
1067 (unsigned long)vlc_internals( p_this )->thread_id );
1069 psz_parent[0] = '\0';
1070 if( p_this->p_parent )
1071 snprintf( psz_parent, 19, ", parent %p", p_this->p_parent );
1073 printf( " %so %p %s%s%s%s%s%s\n", psz_prefix,
1074 p_this, p_this->psz_object_type,
1075 psz_name, psz_thread, psz_refcount, psz_children,
1077 vlc_restorecancel (canc);
1080 static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
1083 char i_back = psz_foo[i_level];
1084 psz_foo[i_level] = '\0';
1086 PrintObject( p_this, psz_foo );
1088 psz_foo[i_level] = i_back;
1090 if( i_level / 2 >= MAX_DUMPSTRUCTURE_DEPTH )
1092 msg_Warn( p_this, "structure tree is too deep" );
1096 for( i = 0 ; i < vlc_internals( p_this )->i_children ; i++ )
1100 psz_foo[i_level-1] = ' ';
1102 if( psz_foo[i_level-2] == '`' )
1104 psz_foo[i_level-2] = ' ';
1108 if( i == vlc_internals( p_this )->i_children - 1 )
1110 psz_foo[i_level] = '`';
1114 psz_foo[i_level] = '|';
1117 psz_foo[i_level+1] = '-';
1118 psz_foo[i_level+2] = '\0';
1120 DumpStructure( vlc_internals( p_this )->pp_children[i], i_level + 2,
1125 static vlc_list_t * NewList( int i_count )
1127 vlc_list_t * p_list = malloc( sizeof( vlc_list_t ) );
1128 if( p_list == NULL )
1131 p_list->i_count = i_count;
1135 p_list->p_values = NULL;
1139 p_list->p_values = malloc( i_count * sizeof( vlc_value_t ) );
1140 if( p_list->p_values == NULL )
1142 p_list->i_count = 0;
1149 static void ListReplace( vlc_list_t *p_list, vlc_object_t *p_object,
1152 if( p_list == NULL || i_index >= p_list->i_count )
1157 vlc_object_hold( p_object );
1159 p_list->p_values[i_index].p_object = p_object;
1164 /*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
1166 if( p_list == NULL )
1171 p_list->p_values = realloc_or_free( p_list->p_values,
1172 (p_list->i_count + 1) * sizeof( vlc_value_t ) );
1173 if( p_list->p_values == NULL )
1175 p_list->i_count = 0;
1179 vlc_object_hold( p_object );
1181 p_list->p_values[p_list->i_count].p_object = p_object;
1187 static int CountChildren( vlc_object_t *p_this, int i_type )
1189 vlc_object_t *p_tmp;
1192 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1194 p_tmp = vlc_internals( p_this )->pp_children[i];
1196 if( vlc_internals( p_tmp )->i_object_type == i_type )
1200 i_count += CountChildren( p_tmp, i_type );
1206 static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
1208 vlc_object_t *p_tmp;
1211 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1213 p_tmp = vlc_internals( p_this )->pp_children[i];
1215 if( vlc_internals( p_tmp )->i_object_type == i_type )
1216 ListReplace( p_list, p_tmp, p_list->i_count++ );
1218 ListChildren( p_list, p_tmp, i_type );