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"
53 # include <winsock2.h>
54 # include <ws2tcpip.h>
56 # define read( a, b, c ) recv (a, b, c, 0)
58 # define write( a, b, c ) send (a, b, c, 0)
60 # define close( a ) closesocket (a)
67 #if defined (HAVE_SYS_EVENTFD_H)
68 # include <sys/eventfd.h>
72 /*****************************************************************************
74 *****************************************************************************/
75 static int DumpCommand( vlc_object_t *, char const *,
76 vlc_value_t, vlc_value_t, void * );
78 static vlc_object_t * FindParent ( vlc_object_t *, int );
79 static vlc_object_t * FindChild ( vlc_object_t *, int );
80 static vlc_object_t * FindParentName( vlc_object_t *, const char * );
81 static vlc_object_t * FindChildName ( vlc_object_t *, const char * );
82 static void PrintObject ( vlc_object_t *, const char * );
83 static void DumpStructure ( vlc_object_t *, int, char * );
85 static vlc_list_t * NewList ( int );
86 static void ListReplace ( vlc_list_t *, vlc_object_t *, int );
87 /*static void ListAppend ( vlc_list_t *, vlc_object_t * );*/
88 static int CountChildren ( vlc_object_t *, int );
89 static void ListChildren ( vlc_list_t *, vlc_object_t *, int );
91 static void vlc_object_destroy( vlc_object_t *p_this );
92 static void vlc_object_detach_unlocked (vlc_object_t *p_this);
94 /*****************************************************************************
95 * Local structure lock
96 *****************************************************************************/
97 static void libvlc_lock (libvlc_int_t *p_libvlc)
99 vlc_mutex_lock (&(libvlc_priv (p_libvlc)->structure_lock));
102 static void libvlc_unlock (libvlc_int_t *p_libvlc)
104 vlc_mutex_unlock (&(libvlc_priv (p_libvlc)->structure_lock));
107 void *__vlc_custom_create( vlc_object_t *p_this, size_t i_size,
108 int i_type, const char *psz_type )
111 vlc_object_internals_t *p_priv;
114 * VLC objects are laid out as follow:
115 * - first the LibVLC-private per-object data,
116 * - then VLC_COMMON members from vlc_object_t,
117 * - finally, the type-specific data (if any).
119 * This function initializes the LibVLC and common data,
120 * and zeroes the rest.
122 p_priv = calloc( 1, sizeof( *p_priv ) + i_size );
126 assert (i_size >= sizeof (vlc_object_t));
127 p_new = (vlc_object_t *)(p_priv + 1);
129 p_priv->i_object_type = i_type;
130 p_new->psz_object_type = psz_type;
131 p_priv->psz_name = NULL;
133 p_new->b_die = false;
134 p_new->b_error = false;
135 p_new->b_force = false;
137 p_new->psz_header = NULL;
140 p_new->i_flags = p_this->i_flags
141 & (OBJECT_FLAGS_NODBG|OBJECT_FLAGS_QUIET|OBJECT_FLAGS_NOINTERACT);
143 p_priv->var_root = NULL;
147 libvlc_int_t *self = (libvlc_int_t*)p_new;
148 p_new->p_libvlc = self;
149 vlc_mutex_init (&(libvlc_priv (self)->structure_lock));
153 p_new->p_libvlc = p_this->p_libvlc;
155 vlc_spin_init( &p_priv->ref_spin );
156 p_priv->i_refcount = 1;
157 p_priv->pf_destructor = NULL;
158 p_priv->b_thread = false;
159 p_new->p_parent = NULL;
160 p_priv->pp_children = NULL;
161 p_priv->i_children = 0;
163 /* Initialize mutexes and condvars */
164 vlc_mutex_init( &p_priv->var_lock );
165 vlc_cond_init( &p_priv->var_wait );
166 p_priv->pipes[0] = p_priv->pipes[1] = -1;
168 if (p_new == VLC_OBJECT(p_new->p_libvlc))
169 { /* TODO: should be in src/libvlc.c */
170 int canc = vlc_savecancel ();
171 var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
172 var_AddCallback( p_new, "tree", DumpCommand, NULL );
173 var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
174 var_AddCallback( p_new, "vars", DumpCommand, NULL );
175 vlc_restorecancel (canc);
183 * Allocates and initializes a vlc object.
185 * @param i_type known object type (all of them are negative integer values),
186 * or object byte size (always positive).
188 * @return the new object, or NULL on error.
190 void * __vlc_object_create( vlc_object_t *p_this, int i_type )
192 const char * psz_type;
197 case VLC_OBJECT_DECODER:
198 i_size = sizeof(decoder_t);
199 psz_type = "decoder";
201 case VLC_OBJECT_AOUT:
202 i_size = sizeof(aout_instance_t);
203 psz_type = "audio output";
206 assert( i_type > 0 ); /* unknown type?! */
208 i_type = VLC_OBJECT_GENERIC;
209 psz_type = "generic";
213 return vlc_custom_create( p_this, i_size, i_type, psz_type );
218 ****************************************************************************
219 * Set the destructor of a vlc object
221 * This function sets the destructor of the vlc object. It will be called
222 * when the object is destroyed when the its refcount reaches 0.
223 * (It is called by the internal function vlc_object_destroy())
224 *****************************************************************************/
225 void __vlc_object_set_destructor( vlc_object_t *p_this,
226 vlc_destructor_t pf_destructor )
228 vlc_object_internals_t *p_priv = vlc_internals(p_this );
230 vlc_spin_lock( &p_priv->ref_spin );
231 p_priv->pf_destructor = pf_destructor;
232 vlc_spin_unlock( &p_priv->ref_spin );
235 static vlc_mutex_t name_lock = VLC_STATIC_MUTEX;
237 #undef vlc_object_set_name
238 int vlc_object_set_name(vlc_object_t *obj, const char *name)
240 vlc_object_internals_t *priv = vlc_internals(obj);
241 char *newname = name ? strdup (name) : NULL;
244 vlc_mutex_lock (&name_lock);
245 oldname = priv->psz_name;
246 priv->psz_name = newname;
247 vlc_mutex_unlock (&name_lock);
250 return (priv->psz_name || !name) ? VLC_SUCCESS : VLC_ENOMEM;
253 #undef vlc_object_get_name
254 char *vlc_object_get_name(const vlc_object_t *obj)
256 vlc_object_internals_t *priv = vlc_internals(obj);
259 vlc_mutex_lock (&name_lock);
260 name = priv->psz_name ? strdup (priv->psz_name) : NULL;
261 vlc_mutex_unlock (&name_lock);
267 ****************************************************************************
268 * Destroy a vlc object (Internal)
270 * This function destroys an object that has been previously allocated with
271 * vlc_object_create. The object's refcount must be zero and it must not be
272 * attached to other objects in any way.
274 * This function must be called with cancellation disabled (currently).
275 *****************************************************************************/
276 static void vlc_object_destroy( vlc_object_t *p_this )
278 vlc_object_internals_t *p_priv = vlc_internals( p_this );
280 /* Objects are always detached beforehand */
281 assert( !p_this->p_parent );
283 /* Send a kill to the object's thread if applicable */
284 vlc_object_kill( p_this );
286 /* Call the custom "subclass" destructor */
287 if( p_priv->pf_destructor )
288 p_priv->pf_destructor( p_this );
290 /* Any thread must have been cleaned up at this point. */
291 assert( !p_priv->b_thread );
293 /* Destroy the associated variables. */
294 var_DestroyAll( p_this );
296 vlc_cond_destroy( &p_priv->var_wait );
297 vlc_mutex_destroy( &p_priv->var_lock );
299 free( p_this->psz_header );
301 free( p_priv->psz_name );
303 vlc_spin_destroy( &p_priv->ref_spin );
304 if( p_priv->pipes[1] != -1 && p_priv->pipes[1] != p_priv->pipes[0] )
305 close( p_priv->pipes[1] );
306 if( p_priv->pipes[0] != -1 )
307 close( p_priv->pipes[0] );
308 if( VLC_OBJECT(p_this->p_libvlc) == p_this )
309 vlc_mutex_destroy (&(libvlc_priv ((libvlc_int_t *)p_this)->structure_lock));
317 * select()-able pipes emulated using Winsock
319 static int pipe (int fd[2])
322 int addrlen = sizeof (addr);
324 SOCKET l = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP), a,
325 c = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
326 if ((l == INVALID_SOCKET) || (c == INVALID_SOCKET))
329 memset (&addr, 0, sizeof (addr));
330 addr.sin_family = AF_INET;
331 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
332 if (bind (l, (PSOCKADDR)&addr, sizeof (addr))
333 || getsockname (l, (PSOCKADDR)&addr, &addrlen)
335 || connect (c, (PSOCKADDR)&addr, addrlen))
338 a = accept (l, NULL, NULL);
339 if (a == INVALID_SOCKET)
350 if (l != INVALID_SOCKET)
352 if (c != INVALID_SOCKET)
358 static vlc_mutex_t pipe_lock = VLC_STATIC_MUTEX;
361 * Returns the readable end of a pipe that becomes readable once termination
362 * of the object is requested (vlc_object_kill()).
363 * This can be used to wake-up out of a select() or poll() event loop, such
364 * typically when doing network I/O.
366 * Note that the pipe will remain the same for the lifetime of the object.
367 * DO NOT read the pipe nor close it yourself. Ever.
369 * @param obj object that would be "killed"
370 * @return a readable pipe descriptor, or -1 on error.
372 int vlc_object_waitpipe( vlc_object_t *obj )
374 vlc_object_internals_t *internals = vlc_internals( obj );
376 vlc_mutex_lock (&pipe_lock);
377 if (internals->pipes[0] == -1)
379 /* This can only ever happen if someone killed us without locking: */
380 assert (internals->pipes[1] == -1);
382 #if defined (HAVE_SYS_EVENTFD_H)
383 internals->pipes[0] = internals->pipes[1] = eventfd (0, 0);
384 if (internals->pipes[0] == -1)
387 if (pipe (internals->pipes))
388 internals->pipes[0] = internals->pipes[1] = -1;
391 if (internals->pipes[0] != -1 && obj->b_die)
392 { /* Race condition: vlc_object_kill() already invoked! */
393 msg_Dbg (obj, "waitpipe: object already dying");
394 write (internals->pipes[1], &(uint64_t){ 1 }, sizeof (uint64_t));
397 vlc_mutex_unlock (&pipe_lock);
398 return internals->pipes[0];
403 * Requests termination of an object, cancels the object thread, and make the
404 * object wait pipe (if it exists) readable. Not a cancellation point.
406 void __vlc_object_kill( vlc_object_t *p_this )
408 vlc_object_internals_t *priv = vlc_internals( p_this );
411 vlc_thread_cancel( p_this );
412 vlc_mutex_lock( &pipe_lock );
416 p_this->b_die = true;
419 /* This also serves as a memory barrier toward vlc_object_alive(): */
420 vlc_mutex_unlock( &pipe_lock );
424 int canc = vlc_savecancel ();
426 /* write _after_ setting b_die, so vlc_object_alive() returns false */
427 write (fd, &(uint64_t){ 1 }, sizeof (uint64_t));
428 msg_Dbg (p_this, "waitpipe: object killed");
429 vlc_restorecancel (canc);
434 /*****************************************************************************
435 * find a typed object and increment its refcount
436 *****************************************************************************
437 * This function recursively looks for a given object type. i_mode can be one
438 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
439 *****************************************************************************/
440 void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
442 vlc_object_t *p_found;
444 /* If we are of the requested type ourselves, don't look further */
445 if( vlc_internals (p_this)->i_object_type == i_type )
447 vlc_object_hold( p_this );
451 /* Otherwise, recursively look for the object */
452 if (i_mode == FIND_ANYWHERE)
453 return vlc_object_find (p_this->p_libvlc, i_type, FIND_CHILD);
457 case VLC_OBJECT_VOUT:
458 case VLC_OBJECT_AOUT:
460 case VLC_OBJECT_INPUT:
461 /* input can only be accessed like this from children,
462 * otherwise we could not promise that it is initialized */
463 if (i_mode != FIND_PARENT)
470 libvlc_lock (p_this->p_libvlc);
474 p_found = FindParent (p_this, i_type);
477 p_found = FindChild (p_this, i_type);
482 libvlc_unlock (p_this->p_libvlc);
487 static int objnamecmp(const vlc_object_t *obj, const char *name)
489 char *objname = vlc_object_get_name(obj);
493 int ret = strcmp (objname, name);
498 #undef vlc_object_find_name
500 * Finds a named object and increment its reference count.
501 * Beware that objects found in this manner can be "owned" by another thread,
502 * be of _any_ type, and be attached to any module (if any). With such an
503 * object reference, you can set or get object variables, emit log messages,
504 * and read write-once object parameters (psz_object_type, etc).
505 * You CANNOT cast the object to a more specific object type, and you
506 * definitely cannot invoke object type-specific callbacks with this.
508 * @param p_this object to search from
509 * @param psz_name name of the object to search for
510 * @param i_mode search direction: FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
512 * @return a matching object (must be released by the caller),
515 vlc_object_t *vlc_object_find_name( vlc_object_t *p_this,
516 const char *psz_name, int i_mode )
518 vlc_object_t *p_found;
520 /* Reading psz_object_name from a separate inhibits thread-safety.
521 * Use a libvlc address variable instead for that sort of things! */
522 msg_Warn( p_this, "%s(%s) is not safe!", __func__, psz_name );
523 /* If have the requested name ourselves, don't look further */
524 if( !objnamecmp(p_this, psz_name) )
526 vlc_object_hold( p_this );
530 /* Otherwise, recursively look for the object */
531 if (i_mode == FIND_ANYWHERE)
532 return vlc_object_find_name (VLC_OBJECT(p_this->p_libvlc), psz_name,
535 libvlc_lock (p_this->p_libvlc);
539 p_found = FindParentName (p_this, psz_name);
542 p_found = FindChildName (p_this, psz_name);
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 */
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 static void DumpVariable (const void *data, const VISIT which, const int depth)
779 if (which != postorder && which != leaf)
783 const variable_t *p_var = *(const variable_t **)data;
784 const char *psz_type = "unknown";
786 switch( p_var->i_type & VLC_VAR_TYPE )
788 #define MYCASE( type, nice ) \
789 case VLC_VAR_ ## type: \
792 MYCASE( VOID, "void" );
793 MYCASE( BOOL, "bool" );
794 MYCASE( INTEGER, "integer" );
795 MYCASE( HOTKEY, "hotkey" );
796 MYCASE( STRING, "string" );
797 MYCASE( MODULE, "module" );
798 MYCASE( FILE, "file" );
799 MYCASE( DIRECTORY, "directory" );
800 MYCASE( VARIABLE, "variable" );
801 MYCASE( FLOAT, "float" );
802 MYCASE( TIME, "time" );
803 MYCASE( ADDRESS, "address" );
804 MYCASE( MUTEX, "mutex" );
805 MYCASE( LIST, "list" );
808 printf( " *-o \"%s\" (%s", p_var->psz_name, psz_type );
809 if( p_var->psz_text )
810 printf( ", %s", p_var->psz_text );
811 fputc( ')', stdout );
812 if( p_var->i_type & VLC_VAR_HASCHOICE )
813 fputs( ", has choices", stdout );
814 if( p_var->i_type & VLC_VAR_ISCOMMAND )
815 fputs( ", command", stdout );
816 if( p_var->i_entries )
817 printf( ", %d callbacks", p_var->i_entries );
818 switch( p_var->i_type & VLC_VAR_CLASS )
824 printf( ": %s", p_var->val.b_bool ? "true" : "false" );
826 case VLC_VAR_INTEGER:
827 printf( ": %d", p_var->val.i_int );
830 printf( ": \"%s\"", p_var->val.psz_string );
833 printf( ": %f", p_var->val.f_float );
836 printf( ": %"PRIi64, (int64_t)p_var->val.i_time );
838 case VLC_VAR_ADDRESS:
839 printf( ": %p", p_var->val.p_address );
842 fputs( ": TODO", stdout );
845 fputc( '\n', stdout );
848 /*****************************************************************************
849 * DumpCommand: print the current vlc structure
850 *****************************************************************************
851 * This function prints either an ASCII tree showing the connections between
852 * vlc objects, and additional information such as their refcount, thread ID,
853 * etc. (command "tree"), or the same data as a simple list (command "list").
854 *****************************************************************************/
855 static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
856 vlc_value_t oldval, vlc_value_t newval, void *p_data )
858 (void)oldval; (void)p_data;
859 vlc_object_t *p_object = NULL;
861 if( *newval.psz_string )
863 /* try using the object's name to find it */
864 p_object = vlc_object_find_name( p_this, newval.psz_string,
872 libvlc_lock (p_this->p_libvlc);
873 if( *psz_cmd == 't' )
875 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
878 p_object = VLC_OBJECT(p_this->p_libvlc);
881 DumpStructure( p_object, 0, psz_foo );
883 else if( *psz_cmd == 'v' )
886 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
888 PrintObject( p_object, "" );
889 vlc_mutex_lock( &vlc_internals( p_object )->var_lock );
890 if( vlc_internals( p_object )->var_root == NULL )
891 puts( " `-o No variables" );
893 twalk( vlc_internals( p_object )->var_root, DumpVariable );
894 vlc_mutex_unlock( &vlc_internals( p_object )->var_lock );
896 libvlc_unlock (p_this->p_libvlc);
898 if( *newval.psz_string )
900 vlc_object_release( p_object );
905 /*****************************************************************************
906 * vlc_list_release: free a list previously allocated by vlc_list_find
907 *****************************************************************************
908 * This function decreases the refcount of all objects in the list and
910 *****************************************************************************/
911 void vlc_list_release( vlc_list_t *p_list )
915 for( i_index = 0; i_index < p_list->i_count; i_index++ )
917 vlc_object_release( p_list->p_values[i_index].p_object );
920 free( p_list->p_values );
924 /* Following functions are local */
926 static vlc_object_t *FindParent (vlc_object_t *p_this, int i_type)
928 for (vlc_object_t *parent = p_this->p_parent;
930 parent = parent->p_parent)
932 if (vlc_internals (parent)->i_object_type == i_type)
933 return vlc_object_hold (parent);
938 static vlc_object_t *FindParentName (vlc_object_t *p_this, const char *name)
940 for (vlc_object_t *parent = p_this->p_parent;
942 parent = parent->p_parent)
944 if (!objnamecmp (parent, name))
945 return vlc_object_hold (parent);
950 static vlc_object_t *FindChild (vlc_object_t *p_this, int i_type)
952 for (int i = vlc_internals( p_this )->i_children; i--; )
954 vlc_object_t *child = vlc_internals (p_this)->pp_children[i];
955 if (vlc_internals (child)->i_object_type == i_type)
956 return vlc_object_hold (child);
958 child = FindChild (child, i_type);
965 static vlc_object_t *FindChildName (vlc_object_t *p_this, const char *name)
967 for (int i = vlc_internals( p_this )->i_children; i--; )
969 vlc_object_t *child = vlc_internals (p_this)->pp_children[i];
970 if (!objnamecmp (child, name))
971 return vlc_object_hold (child);
973 child = FindChildName (child, name);
980 static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
982 char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
985 int canc = vlc_savecancel ();
986 memset( &psz_name, 0, sizeof(psz_name) );
987 char *name = vlc_object_get_name(p_this);
990 snprintf( psz_name, 49, " \"%s\"", name );
996 psz_children[0] = '\0';
997 switch( vlc_internals( p_this )->i_children )
1002 strcpy( psz_children, ", 1 child" );
1005 snprintf( psz_children, 19, ", %i children",
1006 vlc_internals( p_this )->i_children );
1010 psz_refcount[0] = '\0';
1011 if( vlc_internals( p_this )->i_refcount > 0 )
1012 snprintf( psz_refcount, 19, ", refcount %u",
1013 vlc_internals( p_this )->i_refcount );
1015 psz_thread[0] = '\0';
1016 if( vlc_internals( p_this )->b_thread )
1017 snprintf( psz_thread, 29, " (thread %lu)",
1018 (unsigned long)vlc_internals( p_this )->thread_id );
1020 psz_parent[0] = '\0';
1021 if( p_this->p_parent )
1022 snprintf( psz_parent, 19, ", parent %p", p_this->p_parent );
1024 printf( " %so %p %s%s%s%s%s%s\n", psz_prefix,
1025 p_this, p_this->psz_object_type,
1026 psz_name, psz_thread, psz_refcount, psz_children,
1028 vlc_restorecancel (canc);
1031 static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
1034 char i_back = psz_foo[i_level];
1035 psz_foo[i_level] = '\0';
1037 PrintObject( p_this, psz_foo );
1039 psz_foo[i_level] = i_back;
1041 if( i_level / 2 >= MAX_DUMPSTRUCTURE_DEPTH )
1043 msg_Warn( p_this, "structure tree is too deep" );
1047 for( i = 0 ; i < vlc_internals( p_this )->i_children ; i++ )
1051 psz_foo[i_level-1] = ' ';
1053 if( psz_foo[i_level-2] == '`' )
1055 psz_foo[i_level-2] = ' ';
1059 if( i == vlc_internals( p_this )->i_children - 1 )
1061 psz_foo[i_level] = '`';
1065 psz_foo[i_level] = '|';
1068 psz_foo[i_level+1] = '-';
1069 psz_foo[i_level+2] = '\0';
1071 DumpStructure( vlc_internals( p_this )->pp_children[i], i_level + 2,
1076 static vlc_list_t * NewList( int i_count )
1078 vlc_list_t * p_list = malloc( sizeof( vlc_list_t ) );
1079 if( p_list == NULL )
1082 p_list->i_count = i_count;
1086 p_list->p_values = NULL;
1090 p_list->p_values = malloc( i_count * sizeof( vlc_value_t ) );
1091 if( p_list->p_values == NULL )
1093 p_list->i_count = 0;
1100 static void ListReplace( vlc_list_t *p_list, vlc_object_t *p_object,
1103 if( p_list == NULL || i_index >= p_list->i_count )
1108 vlc_object_hold( p_object );
1110 p_list->p_values[i_index].p_object = p_object;
1115 /*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
1117 if( p_list == NULL )
1122 p_list->p_values = realloc_or_free( p_list->p_values,
1123 (p_list->i_count + 1) * sizeof( vlc_value_t ) );
1124 if( p_list->p_values == NULL )
1126 p_list->i_count = 0;
1130 vlc_object_hold( p_object );
1132 p_list->p_values[p_list->i_count].p_object = p_object;
1138 static int CountChildren( vlc_object_t *p_this, int i_type )
1140 vlc_object_t *p_tmp;
1143 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1145 p_tmp = vlc_internals( p_this )->pp_children[i];
1147 if( vlc_internals( p_tmp )->i_object_type == i_type )
1151 i_count += CountChildren( p_tmp, i_type );
1157 static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
1159 vlc_object_t *p_tmp;
1162 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1164 p_tmp = vlc_internals( p_this )->pp_children[i];
1166 if( vlc_internals( p_tmp )->i_object_type == i_type )
1167 ListReplace( p_list, p_tmp, p_list->i_count++ );
1169 ListChildren( p_list, p_tmp, i_type );