1 /*****************************************************************************
2 * objects.c: vlc_object_t handling
3 *****************************************************************************
4 * Copyright (C) 2004-2008 the VideoLAN team
6 * Authors: Samuel Hocevar <sam@zoy.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
21 *****************************************************************************/
25 * This file contains the functions to handle the vlc_object_t type
27 * Unless otherwise stated, functions in this file are not cancellation point.
28 * All functions in this file are safe w.r.t. deferred cancellation.
32 /*****************************************************************************
34 *****************************************************************************/
39 #include <vlc_common.h>
41 #include "../libvlc.h"
43 #include "audio_output/aout_internal.h"
45 #include "vlc_interface.h"
46 #include "vlc_codec.h"
48 #include "variables.h"
54 # include <errno.h> /* ENOSYS */
60 #if defined (HAVE_SYS_EVENTFD_H)
61 # include <sys/eventfd.h>
65 /*****************************************************************************
67 *****************************************************************************/
68 static int DumpCommand( vlc_object_t *, char const *,
69 vlc_value_t, vlc_value_t, void * );
71 static vlc_object_t * FindObject ( vlc_object_t *, int, int );
72 static vlc_object_t * FindObjectName( vlc_object_t *, const char *, int );
73 static void PrintObject ( vlc_object_t *, const char * );
74 static void DumpStructure ( vlc_object_t *, int, char * );
76 static vlc_list_t * NewList ( int );
77 static void ListReplace ( vlc_list_t *, vlc_object_t *, int );
78 /*static void ListAppend ( vlc_list_t *, vlc_object_t * );*/
79 static int CountChildren ( vlc_object_t *, int );
80 static void ListChildren ( vlc_list_t *, vlc_object_t *, int );
82 static void vlc_object_destroy( vlc_object_t *p_this );
83 static void vlc_object_detach_unlocked (vlc_object_t *p_this);
85 /*****************************************************************************
86 * Local structure lock
87 *****************************************************************************/
88 static void libvlc_lock (libvlc_int_t *p_libvlc)
90 vlc_mutex_lock (&(libvlc_priv (p_libvlc)->structure_lock));
93 static void libvlc_unlock (libvlc_int_t *p_libvlc)
95 vlc_mutex_unlock (&(libvlc_priv (p_libvlc)->structure_lock));
98 void *__vlc_custom_create( vlc_object_t *p_this, size_t i_size,
99 int i_type, const char *psz_type )
102 vlc_object_internals_t *p_priv;
105 * VLC objects are laid out as follow:
106 * - first the LibVLC-private per-object data,
107 * - then VLC_COMMON members from vlc_object_t,
108 * - finally, the type-specific data (if any).
110 * This function initializes the LibVLC and common data,
111 * and zeroes the rest.
113 p_priv = calloc( 1, sizeof( *p_priv ) + i_size );
117 assert (i_size >= sizeof (vlc_object_t));
118 p_new = (vlc_object_t *)(p_priv + 1);
120 p_priv->i_object_type = i_type;
121 p_new->psz_object_type = psz_type;
122 p_priv->psz_name = NULL;
124 p_new->b_die = false;
125 p_new->b_error = false;
126 p_new->b_force = false;
128 p_new->psz_header = NULL;
131 p_new->i_flags = p_this->i_flags
132 & (OBJECT_FLAGS_NODBG|OBJECT_FLAGS_QUIET|OBJECT_FLAGS_NOINTERACT);
134 p_priv->pp_vars = NULL;
138 libvlc_int_t *self = (libvlc_int_t*)p_new;
139 p_new->p_libvlc = self;
140 vlc_mutex_init (&(libvlc_priv (self)->structure_lock));
144 p_new->p_libvlc = p_this->p_libvlc;
146 vlc_spin_init( &p_priv->ref_spin );
147 p_priv->i_refcount = 1;
148 p_priv->pf_destructor = NULL;
149 p_priv->b_thread = false;
150 p_new->p_parent = NULL;
151 p_priv->pp_children = NULL;
152 p_priv->i_children = 0;
154 /* Initialize mutexes and condvars */
155 vlc_mutex_init( &p_priv->var_lock );
156 vlc_cond_init( &p_priv->var_wait );
157 p_priv->pipes[0] = p_priv->pipes[1] = -1;
159 if (p_new == VLC_OBJECT(p_new->p_libvlc))
160 { /* TODO: should be in src/libvlc.c */
161 int canc = vlc_savecancel ();
162 var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
163 var_AddCallback( p_new, "tree", DumpCommand, NULL );
164 var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
165 var_AddCallback( p_new, "vars", DumpCommand, NULL );
166 vlc_restorecancel (canc);
174 * Allocates and initializes a vlc object.
176 * @param i_type known object type (all of them are negative integer values),
177 * or object byte size (always positive).
179 * @return the new object, or NULL on error.
181 void * __vlc_object_create( vlc_object_t *p_this, int i_type )
183 const char * psz_type;
188 case VLC_OBJECT_DECODER:
189 i_size = sizeof(decoder_t);
190 psz_type = "decoder";
192 case VLC_OBJECT_AOUT:
193 i_size = sizeof(aout_instance_t);
194 psz_type = "audio output";
197 assert( i_type > 0 ); /* unknown type?! */
199 i_type = VLC_OBJECT_GENERIC;
200 psz_type = "generic";
204 return vlc_custom_create( p_this, i_size, i_type, psz_type );
209 ****************************************************************************
210 * Set the destructor of a vlc object
212 * This function sets the destructor of the vlc object. It will be called
213 * when the object is destroyed when the its refcount reaches 0.
214 * (It is called by the internal function vlc_object_destroy())
215 *****************************************************************************/
216 void __vlc_object_set_destructor( vlc_object_t *p_this,
217 vlc_destructor_t pf_destructor )
219 vlc_object_internals_t *p_priv = vlc_internals(p_this );
221 vlc_spin_lock( &p_priv->ref_spin );
222 p_priv->pf_destructor = pf_destructor;
223 vlc_spin_unlock( &p_priv->ref_spin );
226 static vlc_mutex_t name_lock = VLC_STATIC_MUTEX;
228 #undef vlc_object_set_name
229 int vlc_object_set_name(vlc_object_t *obj, const char *name)
231 vlc_object_internals_t *priv = vlc_internals(obj);
232 char *newname = name ? strdup (name) : NULL;
235 vlc_mutex_lock (&name_lock);
236 oldname = priv->psz_name;
237 priv->psz_name = newname;
238 vlc_mutex_unlock (&name_lock);
241 return (priv->psz_name || !name) ? VLC_SUCCESS : VLC_ENOMEM;
244 #undef vlc_object_get_name
245 char *vlc_object_get_name(const vlc_object_t *obj)
247 vlc_object_internals_t *priv = vlc_internals(obj);
250 vlc_mutex_lock (&name_lock);
251 name = priv->psz_name ? strdup (priv->psz_name) : NULL;
252 vlc_mutex_unlock (&name_lock);
258 ****************************************************************************
259 * Destroy a vlc object (Internal)
261 * This function destroys an object that has been previously allocated with
262 * vlc_object_create. The object's refcount must be zero and it must not be
263 * attached to other objects in any way.
265 * This function must be called with cancellation disabled (currently).
266 *****************************************************************************/
267 static void vlc_object_destroy( vlc_object_t *p_this )
269 vlc_object_internals_t *p_priv = vlc_internals( p_this );
271 /* Objects are always detached beforehand */
272 assert( !p_this->p_parent );
274 /* Send a kill to the object's thread if applicable */
275 vlc_object_kill( p_this );
277 /* Call the custom "subclass" destructor */
278 if( p_priv->pf_destructor )
279 p_priv->pf_destructor( p_this );
281 /* Any thread must have been cleaned up at this point. */
282 assert( !p_priv->b_thread );
284 /* Destroy the associated variables, starting from the end so that
285 * no memmove calls have to be done. */
286 while( p_priv->i_vars )
288 var_Destroy( p_this, p_priv->pp_vars[p_priv->i_vars - 1]->psz_name );
291 vlc_cond_destroy( &p_priv->var_wait );
292 vlc_mutex_destroy( &p_priv->var_lock );
294 free( p_this->psz_header );
296 free( p_priv->psz_name );
298 vlc_spin_destroy( &p_priv->ref_spin );
299 if( p_priv->pipes[1] != -1 && p_priv->pipes[1] != p_priv->pipes[0] )
300 close( p_priv->pipes[1] );
301 if( p_priv->pipes[0] != -1 )
302 close( p_priv->pipes[0] );
303 if( VLC_OBJECT(p_this->p_libvlc) == p_this )
304 vlc_mutex_destroy (&(libvlc_priv ((libvlc_int_t *)p_this)->structure_lock));
311 # include <winsock2.h>
312 # include <ws2tcpip.h>
315 * select()-able pipes emulated using Winsock
317 static int pipe (int fd[2])
320 int addrlen = sizeof (addr);
322 SOCKET l = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP), a,
323 c = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
324 if ((l == INVALID_SOCKET) || (c == INVALID_SOCKET))
327 memset (&addr, 0, sizeof (addr));
328 addr.sin_family = AF_INET;
329 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
330 if (bind (l, (PSOCKADDR)&addr, sizeof (addr))
331 || getsockname (l, (PSOCKADDR)&addr, &addrlen)
333 || connect (c, (PSOCKADDR)&addr, addrlen))
336 a = accept (l, NULL, NULL);
337 if (a == INVALID_SOCKET)
348 if (l != INVALID_SOCKET)
350 if (c != INVALID_SOCKET)
356 #define read( a, b, c ) recv (a, b, c, 0)
358 #define write( a, b, c ) send (a, b, c, 0)
360 #define close( a ) closesocket (a)
363 static vlc_mutex_t pipe_lock = VLC_STATIC_MUTEX;
366 * Returns the readable end of a pipe that becomes readable once termination
367 * of the object is requested (vlc_object_kill()).
368 * This can be used to wake-up out of a select() or poll() event loop, such
369 * typically when doing network I/O.
371 * Note that the pipe will remain the same for the lifetime of the object.
372 * DO NOT read the pipe nor close it yourself. Ever.
374 * @param obj object that would be "killed"
375 * @return a readable pipe descriptor, or -1 on error.
377 int vlc_object_waitpipe( vlc_object_t *obj )
379 vlc_object_internals_t *internals = vlc_internals( obj );
381 vlc_mutex_lock (&pipe_lock);
382 if (internals->pipes[0] == -1)
384 /* This can only ever happen if someone killed us without locking: */
385 assert (internals->pipes[1] == -1);
387 #if defined (HAVE_SYS_EVENTFD_H)
388 internals->pipes[0] = internals->pipes[1] = eventfd (0, 0);
389 if (internals->pipes[0] == -1)
392 if (pipe (internals->pipes))
393 internals->pipes[0] = internals->pipes[1] = -1;
396 if (internals->pipes[0] != -1 && obj->b_die)
397 { /* Race condition: vlc_object_kill() already invoked! */
398 msg_Dbg (obj, "waitpipe: object already dying");
399 write (internals->pipes[1], &(uint64_t){ 1 }, sizeof (uint64_t));
402 vlc_mutex_unlock (&pipe_lock);
403 return internals->pipes[0];
408 * Requests termination of an object, cancels the object thread, and make the
409 * object wait pipe (if it exists) readable. Not a cancellation point.
411 void __vlc_object_kill( vlc_object_t *p_this )
413 vlc_object_internals_t *priv = vlc_internals( p_this );
416 vlc_thread_cancel( p_this );
417 vlc_mutex_lock( &pipe_lock );
421 p_this->b_die = true;
424 /* This also serves as a memory barrier toward vlc_object_alive(): */
425 vlc_mutex_unlock( &pipe_lock );
429 int canc = vlc_savecancel ();
431 /* write _after_ setting b_die, so vlc_object_alive() returns false */
432 write (fd, &(uint64_t){ 1 }, sizeof (uint64_t));
433 msg_Dbg (p_this, "waitpipe: object killed");
434 vlc_restorecancel (canc);
439 /*****************************************************************************
440 * find a typed object and increment its refcount
441 *****************************************************************************
442 * This function recursively looks for a given object type. i_mode can be one
443 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
444 *****************************************************************************/
445 void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
447 vlc_object_t *p_found;
449 /* If we are of the requested type ourselves, don't look further */
450 if( !(i_mode & FIND_STRICT)
451 && vlc_internals (p_this)->i_object_type == i_type )
453 vlc_object_hold( p_this );
457 /* Otherwise, recursively look for the object */
458 if ((i_mode & 0x000f) == FIND_ANYWHERE)
459 return vlc_object_find (p_this->p_libvlc, i_type,
460 (i_mode & ~0x000f)|FIND_CHILD);
462 libvlc_lock (p_this->p_libvlc);
463 p_found = FindObject( p_this, i_type, i_mode );
464 libvlc_unlock (p_this->p_libvlc);
469 static int objnamecmp(const vlc_object_t *obj, const char *name)
471 char *objname = vlc_object_get_name(obj);
475 int ret = strcmp (objname, name);
480 #undef vlc_object_find_name
482 * Finds a named object and increment its reference count.
483 * Beware that objects found in this manner can be "owned" by another thread,
484 * be of _any_ type, and be attached to any module (if any). With such an
485 * object reference, you can set or get object variables, emit log messages,
486 * and read write-once object parameters (psz_object_type, etc).
487 * You CANNOT cast the object to a more specific object type, and you
488 * definitely cannot invoke object type-specific callbacks with this.
490 * @param p_this object to search from
491 * @param psz_name name of the object to search for
492 * @param i_mode search direction: FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
494 * @return a matching object (must be released by the caller),
497 vlc_object_t *vlc_object_find_name( vlc_object_t *p_this,
498 const char *psz_name, int i_mode )
500 vlc_object_t *p_found;
502 /* Reading psz_object_name from a separate inhibits thread-safety.
503 * Use a libvlc address variable instead for that sort of things! */
504 msg_Warn( p_this, "%s(%s) is not safe!", __func__, psz_name );
505 /* If have the requested name ourselves, don't look further */
506 if( !(i_mode & FIND_STRICT) && !objnamecmp(p_this, psz_name) )
508 vlc_object_hold( p_this );
512 libvlc_lock (p_this->p_libvlc);
514 /* Otherwise, recursively look for the object */
515 if( (i_mode & 0x000f) == FIND_ANYWHERE )
517 vlc_object_t *p_root = p_this;
520 while( p_root->p_parent != NULL &&
521 p_root != VLC_OBJECT( p_this->p_libvlc ) )
523 p_root = p_root->p_parent;
526 p_found = FindObjectName( p_root, psz_name,
527 (i_mode & ~0x000f)|FIND_CHILD );
528 if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
530 p_found = FindObjectName( VLC_OBJECT( p_this->p_libvlc ),
531 psz_name, (i_mode & ~0x000f)|FIND_CHILD );
536 p_found = FindObjectName( p_this, psz_name, i_mode );
539 libvlc_unlock (p_this->p_libvlc);
544 * Increment an object reference counter.
546 void * __vlc_object_hold( vlc_object_t *p_this )
548 vlc_object_internals_t *internals = vlc_internals( p_this );
550 vlc_spin_lock( &internals->ref_spin );
551 /* Avoid obvious freed object uses */
552 assert( internals->i_refcount > 0 );
553 /* Increment the counter */
554 internals->i_refcount++;
555 vlc_spin_unlock( &internals->ref_spin );
559 /*****************************************************************************
560 * Decrement an object refcount
561 * And destroy the object if its refcount reach zero.
562 *****************************************************************************/
563 void __vlc_object_release( vlc_object_t *p_this )
565 vlc_object_internals_t *internals = vlc_internals( p_this );
566 vlc_object_t *parent = NULL;
567 bool b_should_destroy;
569 vlc_spin_lock( &internals->ref_spin );
570 assert( internals->i_refcount > 0 );
572 if( internals->i_refcount > 1 )
575 /* There are still other references to the object */
576 internals->i_refcount--;
577 vlc_spin_unlock( &internals->ref_spin );
580 vlc_spin_unlock( &internals->ref_spin );
583 /* Remember that we cannot hold the spin while waiting on the mutex */
584 libvlc_lock (p_this->p_libvlc);
585 /* Take the spin again. Note that another thread may have held the
586 * object in the (very short) mean time. */
587 vlc_spin_lock( &internals->ref_spin );
588 b_should_destroy = --internals->i_refcount == 0;
589 vlc_spin_unlock( &internals->ref_spin );
591 if( b_should_destroy )
593 parent = p_this->p_parent;
595 /* Detach from parent to protect against FIND_CHILDREN */
596 vlc_object_detach_unlocked (p_this);
598 /* We have no children */
599 assert (internals->i_children == 0);
601 libvlc_unlock (p_this->p_libvlc);
603 if( b_should_destroy )
607 canc = vlc_savecancel ();
608 vlc_object_destroy( p_this );
609 vlc_restorecancel (canc);
611 vlc_object_release (parent);
616 ****************************************************************************
617 * attach object to a parent object
618 *****************************************************************************
619 * This function sets p_this as a child of p_parent, and p_parent as a parent
620 * of p_this. This link can be undone using vlc_object_detach.
621 *****************************************************************************/
622 void __vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
624 if( !p_this ) return;
626 vlc_object_hold (p_parent);
627 libvlc_lock (p_this->p_libvlc);
629 /* Attach the parent to its child */
630 assert (!p_this->p_parent);
631 p_this->p_parent = p_parent;
633 /* Attach the child to its parent */
634 vlc_object_internals_t *priv = vlc_internals( p_parent );
635 INSERT_ELEM( priv->pp_children, priv->i_children, priv->i_children,
637 libvlc_unlock (p_this->p_libvlc);
641 static void vlc_object_detach_unlocked (vlc_object_t *p_this)
643 if (p_this->p_parent == NULL)
646 vlc_object_internals_t *priv = vlc_internals( p_this->p_parent );
650 /* Remove p_this's parent */
651 p_this->p_parent = NULL;
653 /* Remove all of p_parent's children which are p_this */
654 for( i_index = priv->i_children ; i_index-- ; )
656 if( priv->pp_children[i_index] == p_this )
659 for( i = i_index ; i < priv->i_children ; i++ )
660 priv->pp_children[i] = priv->pp_children[i+1];
664 if( priv->i_children )
666 vlc_object_t **pp_children = (vlc_object_t **)
667 realloc( priv->pp_children,
668 priv->i_children * sizeof(vlc_object_t *) );
670 priv->pp_children = pp_children;
674 /* Special case - don't realloc() to zero to avoid leaking */
675 free( priv->pp_children );
676 priv->pp_children = NULL;
682 ****************************************************************************
683 * detach object from its parent
684 *****************************************************************************
685 * This function removes all links between an object and its parent.
686 *****************************************************************************/
687 void __vlc_object_detach( vlc_object_t *p_this )
689 vlc_object_t *p_parent;
690 if( !p_this ) return;
692 libvlc_lock (p_this->p_libvlc);
693 p_parent = p_this->p_parent;
695 vlc_object_detach_unlocked( p_this );
696 libvlc_unlock (p_this->p_libvlc);
699 vlc_object_release (p_parent);
704 ****************************************************************************
705 * find a list typed objects and increment their refcount
706 *****************************************************************************
707 * This function recursively looks for a given object type. i_mode can be one
708 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
709 *****************************************************************************/
710 vlc_list_t * vlc_list_find( vlc_object_t *p_this, int i_type, int i_mode )
715 /* Look for the objects */
716 switch( i_mode & 0x000f )
719 return vlc_list_find (VLC_OBJECT(p_this->p_libvlc), i_type, FIND_CHILD);
722 libvlc_lock (p_this->p_libvlc);
723 i_count = CountChildren( p_this, i_type );
724 p_list = NewList( i_count );
726 /* Check allocation was successful */
727 if( p_list->i_count != i_count )
729 libvlc_unlock (p_this->p_libvlc);
735 ListChildren( p_list, p_this, i_type );
736 libvlc_unlock (p_this->p_libvlc);
740 msg_Err( p_this, "unimplemented!" );
741 p_list = NewList( 0 );
749 * Gets the list of children of an objects, and increment their reference
751 * @return a list (possibly empty) or NULL in case of error.
753 vlc_list_t *__vlc_list_children( vlc_object_t *obj )
756 vlc_object_internals_t *priv = vlc_internals( obj );
758 libvlc_lock (obj->p_libvlc);
759 l = NewList( priv->i_children );
760 for (int i = 0; i < l->i_count; i++)
762 vlc_object_hold( priv->pp_children[i] );
763 l->p_values[i].p_object = priv->pp_children[i];
765 libvlc_unlock (obj->p_libvlc);
769 /*****************************************************************************
770 * DumpCommand: print the current vlc structure
771 *****************************************************************************
772 * This function prints either an ASCII tree showing the connections between
773 * vlc objects, and additional information such as their refcount, thread ID,
774 * etc. (command "tree"), or the same data as a simple list (command "list").
775 *****************************************************************************/
776 static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
777 vlc_value_t oldval, vlc_value_t newval, void *p_data )
779 (void)oldval; (void)p_data;
780 vlc_object_t *p_object = NULL;
782 if( *newval.psz_string )
784 /* try using the object's name to find it */
785 p_object = vlc_object_find_name( p_this, newval.psz_string,
793 libvlc_lock (p_this->p_libvlc);
794 if( *psz_cmd == 't' )
796 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
799 p_object = VLC_OBJECT(p_this->p_libvlc);
802 DumpStructure( p_object, 0, psz_foo );
804 else if( *psz_cmd == 'v' )
809 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
811 PrintObject( p_object, "" );
813 vlc_mutex_lock( &vlc_internals( p_object )->var_lock );
814 if( !vlc_internals( p_object )->i_vars )
815 printf( " `-o No variables\n" );
816 for( i = 0; i < vlc_internals( p_object )->i_vars; i++ )
818 const variable_t *p_var = vlc_internals( p_object )->pp_vars[i];
819 const char *psz_type = "unknown";
821 switch( p_var->i_type & VLC_VAR_TYPE )
823 #define MYCASE( type, nice ) \
824 case VLC_VAR_ ## type: \
827 MYCASE( VOID, "void" );
828 MYCASE( BOOL, "bool" );
829 MYCASE( INTEGER, "integer" );
830 MYCASE( HOTKEY, "hotkey" );
831 MYCASE( STRING, "string" );
832 MYCASE( MODULE, "module" );
833 MYCASE( FILE, "file" );
834 MYCASE( DIRECTORY, "directory" );
835 MYCASE( VARIABLE, "variable" );
836 MYCASE( FLOAT, "float" );
837 MYCASE( TIME, "time" );
838 MYCASE( ADDRESS, "address" );
839 MYCASE( MUTEX, "mutex" );
840 MYCASE( LIST, "list" );
843 printf( " %c-o \"%s\" (%s",
844 i + 1 == vlc_internals( p_object )->i_vars ? '`' : '|',
845 p_var->psz_name, psz_type );
846 if( p_var->psz_text )
847 printf( ", %s", p_var->psz_text );
849 if( p_var->i_type & VLC_VAR_HASCHOICE )
850 printf( ", has choices" );
851 if( p_var->i_type & VLC_VAR_ISCOMMAND )
852 printf( ", command" );
853 if( p_var->i_entries )
854 printf( ", %d callbacks", p_var->i_entries );
855 switch( p_var->i_type & VLC_VAR_CLASS )
861 printf( ": %s", p_var->val.b_bool ? "true" : "false" );
863 case VLC_VAR_INTEGER:
864 printf( ": %d", p_var->val.i_int );
867 printf( ": \"%s\"", p_var->val.psz_string );
870 printf( ": %f", p_var->val.f_float );
873 printf( ": %"PRIi64, (int64_t)p_var->val.i_time );
875 case VLC_VAR_ADDRESS:
876 printf( ": %p", p_var->val.p_address );
884 vlc_mutex_unlock( &vlc_internals( p_object )->var_lock );
886 libvlc_unlock (p_this->p_libvlc);
888 if( *newval.psz_string )
890 vlc_object_release( p_object );
895 /*****************************************************************************
896 * vlc_list_release: free a list previously allocated by vlc_list_find
897 *****************************************************************************
898 * This function decreases the refcount of all objects in the list and
900 *****************************************************************************/
901 void vlc_list_release( vlc_list_t *p_list )
905 for( i_index = 0; i_index < p_list->i_count; i_index++ )
907 vlc_object_release( p_list->p_values[i_index].p_object );
910 free( p_list->p_values );
914 /* Following functions are local */
916 static vlc_object_t * FindObject( vlc_object_t *p_this, int i_type, int i_mode )
921 switch( i_mode & 0x000f )
924 p_tmp = p_this->p_parent;
927 if( vlc_internals( p_tmp )->i_object_type == i_type )
929 vlc_object_hold( p_tmp );
934 return FindObject( p_tmp, i_type, i_mode );
940 for( i = vlc_internals( p_this )->i_children; i--; )
942 p_tmp = vlc_internals( p_this )->pp_children[i];
943 if( vlc_internals( p_tmp )->i_object_type == i_type )
945 vlc_object_hold( p_tmp );
948 else if( vlc_internals( p_tmp )->i_children )
950 p_tmp = FindObject( p_tmp, i_type, i_mode );
960 /* Handled in vlc_object_find */
967 static vlc_object_t * FindObjectName( vlc_object_t *p_this,
968 const char *psz_name,
974 switch( i_mode & 0x000f )
977 p_tmp = p_this->p_parent;
980 if( !objnamecmp(p_tmp, psz_name) )
982 vlc_object_hold( p_tmp );
987 return FindObjectName( p_tmp, psz_name, i_mode );
993 for( i = vlc_internals( p_this )->i_children; i--; )
995 p_tmp = vlc_internals( p_this )->pp_children[i];
996 if( !objnamecmp(p_tmp, psz_name ) )
998 vlc_object_hold( p_tmp );
1001 else if( vlc_internals( p_tmp )->i_children )
1003 p_tmp = FindObjectName( p_tmp, psz_name, i_mode );
1013 /* Handled in vlc_object_find */
1021 static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
1023 char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
1026 int canc = vlc_savecancel ();
1027 memset( &psz_name, 0, sizeof(psz_name) );
1028 char *name = vlc_object_get_name(p_this);
1031 snprintf( psz_name, 49, " \"%s\"", name );
1034 psz_name[48] = '\"';
1037 psz_children[0] = '\0';
1038 switch( vlc_internals( p_this )->i_children )
1043 strcpy( psz_children, ", 1 child" );
1046 snprintf( psz_children, 19, ", %i children",
1047 vlc_internals( p_this )->i_children );
1051 psz_refcount[0] = '\0';
1052 if( vlc_internals( p_this )->i_refcount > 0 )
1053 snprintf( psz_refcount, 19, ", refcount %u",
1054 vlc_internals( p_this )->i_refcount );
1056 psz_thread[0] = '\0';
1057 if( vlc_internals( p_this )->b_thread )
1058 snprintf( psz_thread, 29, " (thread %lu)",
1059 (unsigned long)vlc_internals( p_this )->thread_id );
1061 psz_parent[0] = '\0';
1062 if( p_this->p_parent )
1063 snprintf( psz_parent, 19, ", parent %p", p_this->p_parent );
1065 printf( " %so %p %s%s%s%s%s%s\n", psz_prefix,
1066 p_this, p_this->psz_object_type,
1067 psz_name, psz_thread, psz_refcount, psz_children,
1069 vlc_restorecancel (canc);
1072 static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
1075 char i_back = psz_foo[i_level];
1076 psz_foo[i_level] = '\0';
1078 PrintObject( p_this, psz_foo );
1080 psz_foo[i_level] = i_back;
1082 if( i_level / 2 >= MAX_DUMPSTRUCTURE_DEPTH )
1084 msg_Warn( p_this, "structure tree is too deep" );
1088 for( i = 0 ; i < vlc_internals( p_this )->i_children ; i++ )
1092 psz_foo[i_level-1] = ' ';
1094 if( psz_foo[i_level-2] == '`' )
1096 psz_foo[i_level-2] = ' ';
1100 if( i == vlc_internals( p_this )->i_children - 1 )
1102 psz_foo[i_level] = '`';
1106 psz_foo[i_level] = '|';
1109 psz_foo[i_level+1] = '-';
1110 psz_foo[i_level+2] = '\0';
1112 DumpStructure( vlc_internals( p_this )->pp_children[i], i_level + 2,
1117 static vlc_list_t * NewList( int i_count )
1119 vlc_list_t * p_list = malloc( sizeof( vlc_list_t ) );
1120 if( p_list == NULL )
1123 p_list->i_count = i_count;
1127 p_list->p_values = NULL;
1131 p_list->p_values = malloc( i_count * sizeof( vlc_value_t ) );
1132 if( p_list->p_values == NULL )
1134 p_list->i_count = 0;
1141 static void ListReplace( vlc_list_t *p_list, vlc_object_t *p_object,
1144 if( p_list == NULL || i_index >= p_list->i_count )
1149 vlc_object_hold( p_object );
1151 p_list->p_values[i_index].p_object = p_object;
1156 /*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
1158 if( p_list == NULL )
1163 p_list->p_values = realloc_or_free( p_list->p_values,
1164 (p_list->i_count + 1) * sizeof( vlc_value_t ) );
1165 if( p_list->p_values == NULL )
1167 p_list->i_count = 0;
1171 vlc_object_hold( p_object );
1173 p_list->p_values[p_list->i_count].p_object = p_object;
1179 static int CountChildren( vlc_object_t *p_this, int i_type )
1181 vlc_object_t *p_tmp;
1184 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1186 p_tmp = vlc_internals( p_this )->pp_children[i];
1188 if( vlc_internals( p_tmp )->i_object_type == i_type )
1192 i_count += CountChildren( p_tmp, i_type );
1198 static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
1200 vlc_object_t *p_tmp;
1203 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1205 p_tmp = vlc_internals( p_this )->pp_children[i];
1207 if( vlc_internals( p_tmp )->i_object_type == i_type )
1208 ListReplace( p_list, p_tmp, p_list->i_count++ );
1210 ListChildren( p_list, p_tmp, i_type );