git.sesse.net Git - vlc/blob - src/misc/objects.c

   1 /*****************************************************************************
   2  * objects.c: vlc_object_t handling
   3  *****************************************************************************
   4  * Copyright (C) 2004-2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /**
  25  * \file
  26  * This file contains the functions to handle the vlc_object_t type
  27  */
  28
  29
  30 /*****************************************************************************
  31  * Preamble
  32  *****************************************************************************/
  33 #ifdef HAVE_CONFIG_H
  34 # include "config.h"
  35 #endif
  36
  37 #include <vlc/vlc.h>
  38
  39 #include "../libvlc.h"
  40 #include <vlc_vout.h>
  41 #include <vlc_aout.h>
  42 #include "audio_output/aout_internal.h"
  43
  44 #include <vlc_access.h>
  45 #include <vlc_demux.h>
  46 #include <vlc_stream.h>
  47
  48 #include <vlc_sout.h>
  49 #include "stream_output/stream_output.h"
  50
  51 #include "vlc_playlist.h"
  52 #include "vlc_interface.h"
  53 #include "vlc_codec.h"
  54 #include "vlc_filter.h"
  55
  56 #include "vlc_httpd.h"
  57 #include "vlc_vlm.h"
  58 #include "input/vlm_internal.h"
  59 #include "vlc_vod.h"
  60 #include "vlc_tls.h"
  61 #include "vlc_xml.h"
  62 #include "vlc_osd.h"
  63 #include "vlc_meta.h"
  64
  65 #include "variables.h"
  66 #ifndef WIN32
  67 # include <unistd.h>
  68 #else
  69 # include <io.h>
  70 # include <fcntl.h>
  71 # include <errno.h> /* ENOSYS */
  72 #endif
  73 #include <assert.h>
  74
  75 /*****************************************************************************
  76  * Local prototypes
  77  *****************************************************************************/
  78 static int  DumpCommand( vlc_object_t *, char const *,
  79                          vlc_value_t, vlc_value_t, void * );
  80
  81 static vlc_object_t * FindObject    ( vlc_object_t *, int, int );
  82 static vlc_object_t * FindObjectName( vlc_object_t *, const char *, int );
  83 static void           DetachObject  ( vlc_object_t * );
  84 static void           PrintObject   ( vlc_object_t *, const char * );
  85 static void           DumpStructure ( vlc_object_t *, int, char * );
  86 static int            FindIndex     ( vlc_object_t *, vlc_object_t **, int );
  87 static void           SetAttachment ( vlc_object_t *, vlc_bool_t );
  88
  89 static vlc_list_t   * NewList       ( int );
  90 static void           ListReplace   ( vlc_list_t *, vlc_object_t *, int );
  91 /*static void           ListAppend    ( vlc_list_t *, vlc_object_t * );*/
  92 static int            CountChildren ( vlc_object_t *, int );
  93 static void           ListChildren  ( vlc_list_t *, vlc_object_t *, int );
  94
  95 /*****************************************************************************
  96  * Local structure lock
  97  *****************************************************************************/
  98 static vlc_mutex_t    structure_lock;
  99 static vlc_object_internals_t global_internals;
 100
 101 vlc_object_t *vlc_custom_create( vlc_object_t *p_this, size_t i_size,
 102                                  int i_type, const char *psz_type )
 103 {
 104     vlc_object_t *p_new;
 105     vlc_object_internals_t *p_priv;
 106
 107     if( i_type == VLC_OBJECT_GLOBAL )
 108     {
 109         p_new = p_this;
 110         p_priv = &global_internals;
 111         memset( p_priv, 0, sizeof( *p_priv ) );
 112     }
 113     else
 114     {
 115         p_priv = calloc( 1, sizeof( *p_priv ) + i_size );
 116         if( p_priv == NULL )
 117             return NULL;
 118
 119         p_new = (vlc_object_t *)(p_priv + 1);
 120     }
 121
 122     p_new->p_internals = p_priv;
 123     p_new->i_object_type = i_type;
 124     p_new->psz_object_type = psz_type;
 125
 126     p_new->psz_object_name = NULL;
 127
 128     p_new->b_die = VLC_FALSE;
 129     p_new->b_error = VLC_FALSE;
 130     p_new->b_dead = VLC_FALSE;
 131     p_priv->b_attached = VLC_FALSE;
 132     p_new->b_force = VLC_FALSE;
 133
 134     p_new->psz_header = NULL;
 135
 136     if( p_this->i_flags & OBJECT_FLAGS_NODBG )
 137         p_new->i_flags |= OBJECT_FLAGS_NODBG;
 138     if( p_this->i_flags & OBJECT_FLAGS_QUIET )
 139         p_new->i_flags |= OBJECT_FLAGS_QUIET;
 140     if( p_this->i_flags & OBJECT_FLAGS_NOINTERACT )
 141         p_new->i_flags |= OBJECT_FLAGS_NOINTERACT;
 142
 143     p_priv->p_vars = calloc( sizeof( variable_t ), 16 );
 144
 145     if( !p_priv->p_vars )
 146     {
 147         if( i_type != VLC_OBJECT_GLOBAL )
 148             free( p_priv );
 149         return NULL;
 150     }
 151
 152     if( i_type == VLC_OBJECT_GLOBAL )
 153     {
 154         /* If i_type is global, then p_new is actually p_libvlc_global */
 155         libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_new;
 156         p_new->p_libvlc = NULL;
 157
 158         p_libvlc_global->i_counter = 0;
 159         p_new->i_object_id = 0;
 160
 161         p_libvlc_global->i_objects = 1;
 162         p_libvlc_global->pp_objects = malloc( sizeof(vlc_object_t *) );
 163         p_libvlc_global->pp_objects[0] = p_new;
 164         p_priv->b_attached = VLC_TRUE;
 165     }
 166     else
 167     {
 168         libvlc_global_data_t *p_libvlc_global = vlc_global();
 169         if( i_type == VLC_OBJECT_LIBVLC )
 170         {
 171             p_new->p_libvlc = (libvlc_int_t*)p_new;
 172             p_priv->b_attached = VLC_TRUE;
 173         }
 174         else
 175         {
 176             p_new->p_libvlc = p_this->p_libvlc;
 177         }
 178
 179         vlc_mutex_lock( &structure_lock );
 180
 181         p_libvlc_global->i_counter++;
 182         p_new->i_object_id = p_libvlc_global->i_counter;
 183
 184         /* Wooohaa! If *this* fails, we're in serious trouble! Anyway it's
 185          * useless to try and recover anything if pp_objects gets smashed. */
 186         TAB_APPEND( p_libvlc_global->i_objects, p_libvlc_global->pp_objects,
 187                     p_new );
 188
 189         vlc_mutex_unlock( &structure_lock );
 190     }
 191
 192     p_priv->i_refcount = 0;
 193     p_new->p_parent = NULL;
 194     p_new->pp_children = NULL;
 195     p_new->i_children = 0;
 196
 197     p_new->p_private = NULL;
 198
 199     /* Initialize mutexes and condvars */
 200     vlc_mutex_init( p_new, &p_new->object_lock );
 201     vlc_cond_init( p_new, &p_new->object_wait );
 202     vlc_mutex_init( p_new, &p_priv->var_lock );
 203     vlc_spin_init( &p_priv->spin );
 204     p_priv->pipes[0] = p_priv->pipes[1] = -1;
 205
 206     if( i_type == VLC_OBJECT_GLOBAL )
 207     {
 208         vlc_mutex_init( p_new, &structure_lock );
 209     }
 210
 211     if( i_type == VLC_OBJECT_LIBVLC )
 212     {
 213         var_Create( p_new, "list", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
 214         var_AddCallback( p_new, "list", DumpCommand, NULL );
 215         var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
 216         var_AddCallback( p_new, "tree", DumpCommand, NULL );
 217         var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
 218         var_AddCallback( p_new, "vars", DumpCommand, NULL );
 219     }
 220
 221     return p_new;
 222 }
 223
 224
 225 /**
 226  * Allocates and initializes a vlc object.
 227  *
 228  * @param i_type known object type (all of them are negative integer values),
 229  *               or object byte size (always positive).
 230  *
 231  * @return the new object, or NULL on error.
 232  */
 233 void * __vlc_object_create( vlc_object_t *p_this, int i_type )
 234 {
 235     const char   * psz_type;
 236     size_t         i_size;
 237
 238     switch( i_type )
 239     {
 240         case VLC_OBJECT_GLOBAL:
 241             i_size = sizeof(libvlc_global_data_t);
 242             psz_type = "global";
 243             break;
 244         case VLC_OBJECT_LIBVLC:
 245             i_size = sizeof(libvlc_int_t);
 246             psz_type = "libvlc";
 247             break;
 248         case VLC_OBJECT_INTF:
 249             i_size = sizeof(intf_thread_t);
 250             psz_type = "interface";
 251             break;
 252         case VLC_OBJECT_DIALOGS:
 253             i_size = sizeof(intf_thread_t);
 254             psz_type = "dialogs";
 255             break;
 256         case VLC_OBJECT_PLAYLIST:
 257             i_size = sizeof(playlist_t);
 258             psz_type = "playlist";
 259             break;
 260         case VLC_OBJECT_SD:
 261             i_size = sizeof(services_discovery_t);
 262             psz_type = "services discovery";
 263             break;
 264         case VLC_OBJECT_INPUT:
 265             i_size = sizeof(input_thread_t);
 266             psz_type = "input";
 267             break;
 268         case VLC_OBJECT_DEMUX:
 269             i_size = sizeof(demux_t);
 270             psz_type = "demux";
 271             break;
 272         case VLC_OBJECT_ACCESS:
 273             i_size = sizeof(access_t);
 274             psz_type = "access";
 275             break;
 276         case VLC_OBJECT_DECODER:
 277             i_size = sizeof(decoder_t);
 278             psz_type = "decoder";
 279             break;
 280         case VLC_OBJECT_PACKETIZER:
 281             i_size = sizeof(decoder_t);
 282             psz_type = "packetizer";
 283             break;
 284         case VLC_OBJECT_ENCODER:
 285             i_size = sizeof(encoder_t);
 286             psz_type = "encoder";
 287             break;
 288         case VLC_OBJECT_FILTER:
 289             i_size = sizeof(filter_t);
 290             psz_type = "filter";
 291             break;
 292         case VLC_OBJECT_VOUT:
 293             i_size = sizeof(vout_thread_t);
 294             psz_type = "video output";
 295             break;
 296         case VLC_OBJECT_SPU:
 297             i_size = sizeof(spu_t);
 298             psz_type = "subpicture";
 299             break;
 300         case VLC_OBJECT_AOUT:
 301             i_size = sizeof(aout_instance_t);
 302             psz_type = "audio output";
 303             break;
 304         case VLC_OBJECT_SOUT:
 305             i_size = sizeof(sout_instance_t);
 306             psz_type = "stream output";
 307             break;
 308         case VLC_OBJECT_VLM:
 309             i_size = sizeof( vlm_t );
 310             psz_type = "vlm dameon";
 311             break;
 312         case VLC_OBJECT_VOD:
 313             i_size = sizeof( vod_t );
 314             psz_type = "vod server";
 315             break;
 316         case VLC_OBJECT_XML:
 317             i_size = sizeof( xml_t );
 318             psz_type = "xml";
 319             break;
 320         case VLC_OBJECT_OPENGL:
 321             i_size = sizeof( vout_thread_t );
 322             psz_type = "opengl";
 323             break;
 324         case VLC_OBJECT_ANNOUNCE:
 325             i_size = sizeof( announce_handler_t );
 326             psz_type = "announce";
 327             break;
 328         case VLC_OBJECT_META_ENGINE:
 329             i_size = sizeof( meta_engine_t );
 330             psz_type = "meta engine";
 331             break;
 332         case VLC_OBJECT_OSDMENU:
 333             i_size = sizeof( osd_menu_t );
 334             psz_type = "osd menu";
 335             break;
 336         default:
 337             i_size = i_type > (int)sizeof(vlc_object_t)
 338                          ? i_type : (int)sizeof(vlc_object_t);
 339             i_type = VLC_OBJECT_GENERIC;
 340             psz_type = "generic";
 341             break;
 342     }
 343
 344     return vlc_custom_create( p_this, i_size, i_type, psz_type );
 345 }
 346
 347
 348 /**
 349  ****************************************************************************
 350  * Destroy a vlc object
 351  *
 352  * This function destroys an object that has been previously allocated with
 353  * vlc_object_create. The object's refcount must be zero and it must not be
 354  * attached to other objects in any way.
 355  *****************************************************************************/
 356 void __vlc_object_destroy( vlc_object_t *p_this )
 357 {
 358     vlc_object_internals_t *p_priv = vlc_internals( p_this );
 359     int i_delay = 0;
 360
 361     if( p_this->i_children )
 362     {
 363         msg_Err( p_this, "cannot delete object (%i, %s) with children" ,
 364                  p_this->i_object_id, p_this->psz_object_name );
 365         return;
 366     }
 367
 368     if( p_this->p_parent )
 369     {
 370         msg_Err( p_this, "cannot delete object (%i, %s) with a parent",
 371                  p_this->i_object_id, p_this->psz_object_name );
 372         return;
 373     }
 374
 375     while( p_priv->i_refcount > 0 )
 376     {
 377         i_delay++;
 378
 379         /* Don't warn immediately ... 100ms seems OK */
 380         if( i_delay == 2 )
 381         {
 382             msg_Warn( p_this,
 383                   "refcount is %u, delaying before deletion (id=%d,type=%d)",
 384                   p_priv->i_refcount, p_this->i_object_id,
 385                   p_this->i_object_type );
 386         }
 387         else if( i_delay == 10 )
 388         {
 389             msg_Err( p_this,
 390                   "refcount is %u, delaying again (id=%d,type=%d)",
 391                   p_priv->i_refcount, p_this->i_object_id,
 392                   p_this->i_object_type );
 393         }
 394         else if( i_delay == 20 )
 395         {
 396             msg_Err( p_this,
 397                   "waited too long, cancelling destruction (id=%d,type=%d)",
 398                   p_this->i_object_id, p_this->i_object_type );
 399             return;
 400         }
 401
 402         msleep( 100000 );
 403     }
 404
 405     /* Destroy the associated variables, starting from the end so that
 406      * no memmove calls have to be done. */
 407     while( p_priv->i_vars )
 408     {
 409         var_Destroy( p_this, p_priv->p_vars[p_priv->i_vars - 1].psz_name );
 410     }
 411
 412     free( p_priv->p_vars );
 413     vlc_mutex_destroy( &p_priv->var_lock );
 414
 415     if( p_this->psz_header ) free( p_this->psz_header );
 416
 417     if( p_this->i_object_type == VLC_OBJECT_GLOBAL )
 418     {
 419         libvlc_global_data_t *p_global = (libvlc_global_data_t *)p_this;
 420         /* We are the global object ... no need to lock. */
 421         free( p_global->pp_objects );
 422         p_global->pp_objects = NULL;
 423         p_global->i_objects--;
 424
 425         vlc_mutex_destroy( &structure_lock );
 426     }
 427     else
 428     {
 429         libvlc_global_data_t *p_libvlc_global = vlc_global();
 430         int i_index;
 431
 432         vlc_mutex_lock( &structure_lock );
 433
 434         /* Wooohaa! If *this* fails, we're in serious trouble! Anyway it's
 435          * useless to try and recover anything if pp_objects gets smashed. */
 436         i_index = FindIndex( p_this, p_libvlc_global->pp_objects,
 437                              p_libvlc_global->i_objects );
 438         REMOVE_ELEM( p_libvlc_global->pp_objects,
 439                      p_libvlc_global->i_objects, i_index );
 440
 441         vlc_mutex_unlock( &structure_lock );
 442     }
 443
 444 #if defined(WIN32) || defined(UNDER_CE)
 445     /* if object has an associated thread, close it now */
 446     if( p_priv->thread_id.hThread )
 447        CloseHandle(p_priv->thread_id.hThread);
 448 #endif
 449
 450     vlc_mutex_destroy( &p_this->object_lock );
 451     vlc_cond_destroy( &p_this->object_wait );
 452     vlc_spin_destroy( &p_priv->spin );
 453     if( p_priv->pipes[1] != -1 )
 454         close( p_priv->pipes[1] );
 455     if( p_priv->pipes[0] != -1 )
 456         close( p_priv->pipes[0] );
 457
 458     /* global is not dynamically allocated by vlc_object_create */
 459     if( p_this->i_object_type != VLC_OBJECT_GLOBAL )
 460         free( p_priv );
 461 }
 462
 463
 464 /** Inter-object signaling */
 465
 466 void __vlc_object_lock( vlc_object_t *obj )
 467 {
 468     vlc_mutex_lock( &obj->object_lock );
 469 }
 470
 471 void __vlc_object_unlock( vlc_object_t *obj )
 472 {
 473     vlc_assert_locked( &obj->object_lock );
 474     vlc_mutex_unlock( &obj->object_lock );
 475 }
 476
 477 #ifdef WIN32
 478 # include <winsock2.h>
 479 # include <ws2tcpip.h>
 480
 481 /**
 482  * select()-able pipes emulated using Winsock
 483  */
 484 static int pipe (int fd[2])
 485 {
 486     SOCKADDR_IN addr;
 487     int addrlen = sizeof (addr);
 488
 489     SOCKET l = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP), a,
 490            c = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
 491     if ((l == INVALID_SOCKET) || (c == INVALID_SOCKET))
 492         goto error;
 493
 494     memset (&addr, 0, sizeof (addr));
 495     addr.sin_family = AF_INET;
 496     addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
 497     if (bind (l, (PSOCKADDR)&addr, sizeof (addr))
 498      || getsockname (l, (PSOCKADDR)&addr, &addrlen)
 499      || listen (l, 1)
 500      || connect (c, (PSOCKADDR)&addr, addrlen))
 501         goto error;
 502
 503     a = accept (l, NULL, NULL);
 504     if (a == INVALID_SOCKET)
 505         goto error;
 506
 507     closesocket (l);
 508     shutdown (a, 0);
 509     shutdown (c, 1);
 510     fd[0] = c;
 511     fd[1] = a;
 512     return 0;
 513
 514 error:
 515     if (l != INVALID_SOCKET)
 516         closesocket (l);
 517     if (c != INVALID_SOCKET)
 518         closesocket (c);
 519     return -1;
 520 }
 521
 522 #undef  read
 523 #define read( a, b, c )  recv (a, b, c, 0)
 524 #undef  write
 525 #define write( a, b, c ) send (a, b, c, 0)
 526 #undef  close
 527 #define close( a )       closesocket (a)
 528 #endif /* WIN32 */
 529
 530 /**
 531  * Returns the readable end of a pipe that becomes readable once termination
 532  * of the object is requested (vlc_object_kill()).
 533  * This can be used to wake-up out of a select() or poll() event loop, such
 534  * typically when doing network I/O.
 535  *
 536  * Note that the pipe will remain the same for the lifetime of the object.
 537  * DO NOT read the pipe nor close it yourself. Ever.
 538  *
 539  * @param obj object that would be "killed"
 540  * @return a readable pipe descriptor, or -1 on error.
 541  */
 542 int __vlc_object_waitpipe( vlc_object_t *obj )
 543 {
 544     int pfd[2] = { -1, -1 };
 545     struct vlc_object_internals_t *internals = obj->p_internals;
 546     vlc_bool_t killed = VLC_FALSE;
 547
 548     vlc_spin_lock (&internals->spin);
 549     if (internals->pipes[0] == -1)
 550     {
 551         /* This can only ever happen if someone killed us without locking: */
 552         assert (internals->pipes[1] == -1);
 553         vlc_spin_unlock (&internals->spin);
 554
 555         if (pipe (pfd))
 556             return -1;
 557
 558         vlc_spin_lock (&internals->spin);
 559         if (internals->pipes[0] == -1)
 560         {
 561             internals->pipes[0] = pfd[0];
 562             internals->pipes[1] = pfd[1];
 563             pfd[0] = pfd[1] = -1;
 564         }
 565         killed = obj->b_die;
 566     }
 567     vlc_spin_unlock (&internals->spin);
 568
 569     if (killed)
 570     {
 571         /* Race condition: vlc_object_kill() already invoked! */
 572         int fd;
 573
 574         vlc_spin_lock (&internals->spin);
 575         fd = internals->pipes[1];
 576         internals->pipes[1] = -1;
 577         vlc_spin_unlock (&internals->spin);
 578         if (fd != -1)
 579             close (fd);
 580     }
 581
 582     /* Race condition: two threads call pipe() - unlikely */
 583     if (pfd[0] != -1)
 584         close (pfd[0]);
 585     if (pfd[1] != -1)
 586         close (pfd[1]);
 587
 588     return internals->pipes[0];
 589 }
 590
 591
 592 /**
 593  * Waits for the object to be signaled (using vlc_object_signal()).
 594  * If the object already has a signal pending, this function will return
 595  * immediately. It is asserted that the caller holds the object lock.
 596  *
 597  * @return true if the object is dying and should terminate.
 598  */
 599 vlc_bool_t __vlc_object_wait( vlc_object_t *obj )
 600 {
 601     vlc_assert_locked( &obj->object_lock );
 602     vlc_cond_wait( &obj->object_wait, &obj->object_lock );
 603     return obj->b_die;
 604 }
 605
 606
 607 /**
 608  * Waits for the object to be signaled (using vlc_object_signal()), or for
 609  * a timer to expire.
 610  * If the object already has a signal pending, this function will return
 611  * immediately. It is asserted that the caller holds the object lock.
 612  *
 613  * @return negative if the object is dying and should terminate,
 614  * positive if the the object has been signaled but is not dying,
 615  * 0 if timeout has been reached.
 616  */
 617 int __vlc_object_timedwait( vlc_object_t *obj, mtime_t deadline )
 618 {
 619     int v;
 620
 621     vlc_assert_locked( &obj->object_lock );
 622     v = vlc_cond_timedwait( &obj->object_wait, &obj->object_lock, deadline );
 623     if( v == 0 ) /* signaled */
 624         return obj->b_die ? -1 : 1;
 625     return 0;
 626 }
 627
 628
 629 /**
 630  * Checks whether an object has been "killed".
 631  * The object lock must be held.
 632  *
 633  * Typical code for an object thread could be:
 634  *
 635    vlc_object_lock (self);
 636    ...initialization...
 637    while (vlc_object_alive (self))
 638    {
 639        ...preprocessing...
 640
 641        if (vlc_object_wait (self))
 642            continue;
 643
 644        ...postprocessing...
 645    }
 646    ...deinitialization...
 647    vlc_object_unlock (self);
 648  *
 649  *
 650  * @return true iff the object has not been killed yet
 651  */
 652 vlc_bool_t __vlc_object_alive( vlc_object_t *obj )
 653 {
 654     vlc_assert_locked( &obj->object_lock );
 655     return !obj->b_die;
 656 }
 657
 658
 659 /**
 660  * Signals an object for which the lock is held.
 661  */
 662 void __vlc_object_signal_unlocked( vlc_object_t *obj )
 663 {
 664     vlc_assert_locked (&obj->object_lock);
 665     vlc_cond_signal( &obj->object_wait );
 666 }
 667
 668
 669 /**
 670  * Requests termination of an object.
 671  * If the object is LibVLC, also request to terminate all its children.
 672  */
 673 void __vlc_object_kill( vlc_object_t *p_this )
 674 {
 675     struct vlc_object_internals_t *internals = p_this->p_internals;
 676     int fd;
 677
 678     vlc_mutex_lock( &p_this->object_lock );
 679     p_this->b_die = VLC_TRUE;
 680
 681     vlc_spin_lock (&internals->spin);
 682     fd = internals->pipes[1];
 683     internals->pipes[1] = -1;
 684     vlc_spin_unlock (&internals->spin);
 685
 686     if( fd != -1 )
 687         close (fd);
 688
 689     if( p_this->i_object_type == VLC_OBJECT_LIBVLC )
 690         for( int i = 0; i < p_this->i_children ; i++ )
 691             vlc_object_kill( p_this->pp_children[i] );
 692
 693     vlc_object_signal_unlocked( p_this );
 694     vlc_mutex_unlock( &p_this->object_lock );
 695 }
 696
 697
 698 /**
 699  * find an object given its ID
 700  *
 701  * This function looks for the object whose i_object_id field is i_id. We
 702  * use a dichotomy so that lookups are in log2(n).
 703  *****************************************************************************/
 704 void * vlc_object_get( int i_id )
 705 {
 706     int i_max, i_middle;
 707     vlc_object_t **pp_objects;
 708     libvlc_global_data_t *p_libvlc_global = vlc_global();
 709
 710     vlc_mutex_lock( &structure_lock );
 711
 712     pp_objects = p_libvlc_global->pp_objects;
 713
 714     /* Perform our dichotomy */
 715     for( i_max = p_libvlc_global->i_objects - 1 ; ; )
 716     {
 717         i_middle = i_max / 2;
 718
 719         if( pp_objects[i_middle]->i_object_id > i_id )
 720         {
 721             i_max = i_middle;
 722         }
 723         else if( pp_objects[i_middle]->i_object_id < i_id )
 724         {
 725             if( i_middle )
 726             {
 727                 pp_objects += i_middle;
 728                 i_max -= i_middle;
 729             }
 730             else
 731             {
 732                 /* This happens when there are only two remaining objects */
 733                 if( pp_objects[i_middle+1]->i_object_id == i_id )
 734                 {
 735                     vlc_mutex_unlock( &structure_lock );
 736                     pp_objects[i_middle+1]->p_internals->i_refcount++;
 737                     return pp_objects[i_middle+1];
 738                 }
 739                 break;
 740             }
 741         }
 742         else
 743         {
 744             vlc_mutex_unlock( &structure_lock );
 745             pp_objects[i_middle]->p_internals->i_refcount++;
 746             return pp_objects[i_middle];
 747         }
 748
 749         if( i_max == 0 )
 750         {
 751             /* this means that i_max == i_middle, and since we have already
 752              * tested pp_objects[i_middle]), p_found is properly set. */
 753             break;
 754         }
 755     }
 756
 757     vlc_mutex_unlock( &structure_lock );
 758     return NULL;
 759 }
 760
 761 /**
 762  ****************************************************************************
 763  * find a typed object and increment its refcount
 764  *****************************************************************************
 765  * This function recursively looks for a given object type. i_mode can be one
 766  * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
 767  *****************************************************************************/
 768 void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
 769 {
 770     vlc_object_t *p_found;
 771
 772     vlc_mutex_lock( &structure_lock );
 773
 774     /* If we are of the requested type ourselves, don't look further */
 775     if( !(i_mode & FIND_STRICT) && p_this->i_object_type == i_type )
 776     {
 777         p_this->p_internals->i_refcount++;
 778         vlc_mutex_unlock( &structure_lock );
 779         return p_this;
 780     }
 781
 782     /* Otherwise, recursively look for the object */
 783     if( (i_mode & 0x000f) == FIND_ANYWHERE )
 784     {
 785         vlc_object_t *p_root = p_this;
 786
 787         /* Find the root */
 788         while( p_root->p_parent != NULL &&
 789                p_root != VLC_OBJECT( p_this->p_libvlc ) )
 790         {
 791             p_root = p_root->p_parent;
 792         }
 793
 794         p_found = FindObject( p_root, i_type, (i_mode & ~0x000f)|FIND_CHILD );
 795         if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
 796         {
 797             p_found = FindObject( VLC_OBJECT( p_this->p_libvlc ),
 798                                   i_type, (i_mode & ~0x000f)|FIND_CHILD );
 799         }
 800     }
 801     else
 802     {
 803         p_found = FindObject( p_this, i_type, i_mode );
 804     }
 805
 806     vlc_mutex_unlock( &structure_lock );
 807
 808     return p_found;
 809 }
 810
 811 /**
 812  ****************************************************************************
 813  * find a named object and increment its refcount
 814  *****************************************************************************
 815  * This function recursively looks for a given object name. i_mode can be one
 816  * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
 817  *****************************************************************************/
 818 void * __vlc_object_find_name( vlc_object_t *p_this, const char *psz_name,
 819                                int i_mode )
 820 {
 821     vlc_object_t *p_found;
 822
 823     vlc_mutex_lock( &structure_lock );
 824
 825     /* If have the requested name ourselves, don't look further */
 826     if( !(i_mode & FIND_STRICT)
 827         && p_this->psz_object_name
 828         && !strcmp( p_this->psz_object_name, psz_name ) )
 829     {
 830         p_this->p_internals->i_refcount++;
 831         vlc_mutex_unlock( &structure_lock );
 832         return p_this;
 833     }
 834
 835     /* Otherwise, recursively look for the object */
 836     if( (i_mode & 0x000f) == FIND_ANYWHERE )
 837     {
 838         vlc_object_t *p_root = p_this;
 839
 840         /* Find the root */
 841         while( p_root->p_parent != NULL &&
 842                p_root != VLC_OBJECT( p_this->p_libvlc ) )
 843         {
 844             p_root = p_root->p_parent;
 845         }
 846
 847         p_found = FindObjectName( p_root, psz_name,
 848                                  (i_mode & ~0x000f)|FIND_CHILD );
 849         if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
 850         {
 851             p_found = FindObjectName( VLC_OBJECT( p_this->p_libvlc ),
 852                                       psz_name, (i_mode & ~0x000f)|FIND_CHILD );
 853         }
 854     }
 855     else
 856     {
 857         p_found = FindObjectName( p_this, psz_name, i_mode );
 858     }
 859
 860     vlc_mutex_unlock( &structure_lock );
 861
 862     return p_found;
 863 }
 864
 865 /**
 866  ****************************************************************************
 867  * increment an object refcount
 868  *****************************************************************************/
 869 void __vlc_object_yield( vlc_object_t *p_this )
 870 {
 871     vlc_mutex_lock( &structure_lock );
 872     p_this->p_internals->i_refcount++;
 873     vlc_mutex_unlock( &structure_lock );
 874 }
 875
 876 static inline void Release( vlc_object_t *obj )
 877 {
 878     assert( obj->p_internals->i_refcount > 0 );
 879     obj->p_internals->i_refcount--;
 880 }
 881
 882 /*****************************************************************************
 883  * decrement an object refcount
 884  *****************************************************************************/
 885 void __vlc_object_release( vlc_object_t *p_this )
 886 {
 887     vlc_mutex_lock( &structure_lock );
 888     Release( p_this );
 889     vlc_mutex_unlock( &structure_lock );
 890 }
 891
 892 /**
 893  ****************************************************************************
 894  * attach object to a parent object
 895  *****************************************************************************
 896  * This function sets p_this as a child of p_parent, and p_parent as a parent
 897  * of p_this. This link can be undone using vlc_object_detach.
 898  *****************************************************************************/
 899 void __vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
 900 {
 901     if( !p_this ) return;
 902
 903     vlc_mutex_lock( &structure_lock );
 904
 905     /* Attach the parent to its child */
 906     p_this->p_parent = p_parent;
 907
 908     /* Attach the child to its parent */
 909     INSERT_ELEM( p_parent->pp_children, p_parent->i_children,
 910                  p_parent->i_children, p_this );
 911
 912     /* Climb up the tree to see whether we are connected with the root */
 913     if( p_parent->p_internals->b_attached )
 914     {
 915         SetAttachment( p_this, VLC_TRUE );
 916     }
 917
 918     vlc_mutex_unlock( &structure_lock );
 919 }
 920
 921 /**
 922  ****************************************************************************
 923  * detach object from its parent
 924  *****************************************************************************
 925  * This function removes all links between an object and its parent.
 926  *****************************************************************************/
 927 void __vlc_object_detach( vlc_object_t *p_this )
 928 {
 929     if( !p_this ) return;
 930
 931     vlc_mutex_lock( &structure_lock );
 932     if( !p_this->p_parent )
 933     {
 934         msg_Err( p_this, "object is not attached" );
 935         vlc_mutex_unlock( &structure_lock );
 936         return;
 937     }
 938
 939     /* Climb up the tree to see whether we are connected with the root */
 940     if( p_this->p_parent->p_internals->b_attached )
 941     {
 942         SetAttachment( p_this, VLC_FALSE );
 943     }
 944
 945     DetachObject( p_this );
 946     vlc_mutex_unlock( &structure_lock );
 947     p_this = NULL;
 948 }
 949
 950 /**
 951  ****************************************************************************
 952  * find a list typed objects and increment their refcount
 953  *****************************************************************************
 954  * This function recursively looks for a given object type. i_mode can be one
 955  * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
 956  *****************************************************************************/
 957 vlc_list_t * __vlc_list_find( vlc_object_t *p_this, int i_type, int i_mode )
 958 {
 959     vlc_list_t *p_list;
 960     vlc_object_t **pp_current, **pp_end;
 961     int i_count = 0, i_index = 0;
 962     libvlc_global_data_t *p_libvlc_global = vlc_global();
 963
 964     vlc_mutex_lock( &structure_lock );
 965
 966     /* Look for the objects */
 967     switch( i_mode & 0x000f )
 968     {
 969     case FIND_ANYWHERE:
 970         pp_current = p_libvlc_global->pp_objects;
 971         pp_end = pp_current + p_libvlc_global->i_objects;
 972
 973         for( ; pp_current < pp_end ; pp_current++ )
 974         {
 975             if( (*pp_current)->p_internals->b_attached
 976                  && (*pp_current)->i_object_type == i_type )
 977             {
 978                 i_count++;
 979             }
 980         }
 981
 982         p_list = NewList( i_count );
 983         pp_current = p_libvlc_global->pp_objects;
 984
 985         for( ; pp_current < pp_end ; pp_current++ )
 986         {
 987             if( (*pp_current)->p_internals->b_attached
 988                  && (*pp_current)->i_object_type == i_type )
 989             {
 990                 ListReplace( p_list, *pp_current, i_index );
 991                 if( i_index < i_count ) i_index++;
 992             }
 993         }
 994     break;
 995
 996     case FIND_CHILD:
 997         i_count = CountChildren( p_this, i_type );
 998         p_list = NewList( i_count );
 999
1000         /* Check allocation was successful */
1001         if( p_list->i_count != i_count )
1002         {
1003             msg_Err( p_this, "list allocation failed!" );
1004             p_list->i_count = 0;
1005             break;
1006         }
1007
1008         p_list->i_count = 0;
1009         ListChildren( p_list, p_this, i_type );
1010         break;
1011
1012     default:
1013         msg_Err( p_this, "unimplemented!" );
1014         p_list = NewList( 0 );
1015         break;
1016     }
1017
1018     vlc_mutex_unlock( &structure_lock );
1019
1020     return p_list;
1021 }
1022
1023 /*****************************************************************************
1024  * DumpCommand: print the current vlc structure
1025  *****************************************************************************
1026  * This function prints either an ASCII tree showing the connections between
1027  * vlc objects, and additional information such as their refcount, thread ID,
1028  * etc. (command "tree"), or the same data as a simple list (command "list").
1029  *****************************************************************************/
1030 static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
1031                         vlc_value_t oldval, vlc_value_t newval, void *p_data )
1032 {
1033     libvlc_global_data_t *p_libvlc_global = vlc_global();
1034
1035     (void)oldval; (void)p_data;
1036     if( *psz_cmd == 'l' )
1037     {
1038         vlc_mutex_lock( &structure_lock );
1039
1040         vlc_object_t **pp_current, **pp_end;
1041
1042         pp_current = p_libvlc_global->pp_objects;
1043         pp_end = pp_current + p_libvlc_global->i_objects;
1044
1045         for( ; pp_current < pp_end ; pp_current++ )
1046         {
1047             if( (*pp_current)->p_internals->b_attached )
1048             {
1049                 PrintObject( *pp_current, "" );
1050             }
1051             else
1052             {
1053                 printf( " o %.8i %s (not attached)\n",
1054                         (*pp_current)->i_object_id,
1055                         (*pp_current)->psz_object_type );
1056             }
1057         }
1058
1059         vlc_mutex_unlock( &structure_lock );
1060     }
1061     else
1062     {
1063         vlc_object_t *p_object = NULL;
1064
1065         if( *newval.psz_string )
1066         {
1067             char *end;
1068             int i_id = strtol( newval.psz_string, &end, 0 );
1069             if( end != newval.psz_string )
1070                 p_object = vlc_object_get( i_id );
1071             else
1072             {
1073                 /* try using the object's name to find it */
1074                 vlc_object_t *p_libvlc = vlc_object_get( 1 );
1075                 if( p_libvlc )
1076                 {
1077                     /* Look in p_libvlc's children tree */
1078                     p_object = vlc_object_find_name( p_libvlc,
1079                                                      newval.psz_string,
1080                                                      FIND_CHILD );
1081                     vlc_object_release( p_libvlc );
1082                 }
1083                 if( !p_object )
1084                 {
1085                     /* If it's not in libvlc, look in libvlc_global (== p_this) */
1086                     p_object = vlc_object_find_name( p_this,
1087                                                      newval.psz_string,
1088                                                      FIND_CHILD );
1089                 }
1090             }
1091
1092             if( !p_object )
1093             {
1094                 return VLC_ENOOBJ;
1095             }
1096         }
1097
1098         vlc_mutex_lock( &structure_lock );
1099
1100         if( *psz_cmd == 't' )
1101         {
1102             char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
1103
1104             if( !p_object )
1105                 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
1106
1107             psz_foo[0] = '|';
1108             DumpStructure( p_object, 0, psz_foo );
1109         }
1110         else if( *psz_cmd == 'v' )
1111         {
1112             int i;
1113
1114             if( !p_object )
1115                 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
1116
1117             PrintObject( p_object, "" );
1118
1119             if( !p_object->p_internals->i_vars )
1120                 printf( " `-o No variables\n" );
1121             for( i = 0; i < p_object->p_internals->i_vars; i++ )
1122             {
1123                 variable_t *p_var = p_object->p_internals->p_vars + i;
1124
1125                 const char *psz_type = "unknown";
1126                 switch( p_var->i_type & VLC_VAR_TYPE )
1127                 {
1128 #define MYCASE( type, nice )                \
1129                     case VLC_VAR_ ## type:  \
1130                         psz_type = nice;    \
1131                         break;
1132                     MYCASE( VOID, "void" );
1133                     MYCASE( BOOL, "bool" );
1134                     MYCASE( INTEGER, "integer" );
1135                     MYCASE( HOTKEY, "hotkey" );
1136                     MYCASE( STRING, "string" );
1137                     MYCASE( MODULE, "module" );
1138                     MYCASE( FILE, "file" );
1139                     MYCASE( DIRECTORY, "directory" );
1140                     MYCASE( VARIABLE, "variable" );
1141                     MYCASE( FLOAT, "float" );
1142                     MYCASE( TIME, "time" );
1143                     MYCASE( ADDRESS, "address" );
1144                     MYCASE( MUTEX, "mutex" );
1145                     MYCASE( LIST, "list" );
1146 #undef MYCASE
1147                 }
1148                 printf( " %c-o \"%s\" (%s",
1149                         i + 1 == p_object->p_internals->i_vars ? '`' : '|',
1150                         p_var->psz_name, psz_type );
1151                 if( p_var->psz_text )
1152                     printf( ", %s", p_var->psz_text );
1153                 printf( ")" );
1154                 if( p_var->i_type & VLC_VAR_ISCOMMAND )
1155                     printf( ", command" );
1156                 if( p_var->i_entries )
1157                     printf( ", %d callbacks", p_var->i_entries );
1158                 switch( p_var->i_type & 0x00f0 )
1159                 {
1160                     case VLC_VAR_VOID:
1161                     case VLC_VAR_MUTEX:
1162                         break;
1163                     case VLC_VAR_BOOL:
1164                         printf( ": %s", p_var->val.b_bool ? "true" : "false" );
1165                         break;
1166                     case VLC_VAR_INTEGER:
1167                         printf( ": %d", p_var->val.i_int );
1168                         break;
1169                     case VLC_VAR_STRING:
1170                         printf( ": \"%s\"", p_var->val.psz_string );
1171                         break;
1172                     case VLC_VAR_FLOAT:
1173                         printf( ": %f", p_var->val.f_float );
1174                         break;
1175                     case VLC_VAR_TIME:
1176                         printf( ": " I64Fi, (int64_t)p_var->val.i_time );
1177                         break;
1178                     case VLC_VAR_ADDRESS:
1179                         printf( ": %p", p_var->val.p_address );
1180                         break;
1181                     case VLC_VAR_LIST:
1182                         printf( ": TODO" );
1183                         break;
1184                 }
1185                 printf( "\n" );
1186             }
1187         }
1188
1189         vlc_mutex_unlock( &structure_lock );
1190
1191         if( *newval.psz_string )
1192         {
1193             vlc_object_release( p_object );
1194         }
1195     }
1196
1197     return VLC_SUCCESS;
1198 }
1199
1200 /*****************************************************************************
1201  * vlc_list_release: free a list previously allocated by vlc_list_find
1202  *****************************************************************************
1203  * This function decreases the refcount of all objects in the list and
1204  * frees the list.
1205  *****************************************************************************/
1206 void vlc_list_release( vlc_list_t *p_list )
1207 {
1208     int i_index;
1209
1210     vlc_mutex_lock( &structure_lock );
1211     for( i_index = 0; i_index < p_list->i_count; i_index++ )
1212     {
1213         Release( p_list->p_values[i_index].p_object );
1214     }
1215     vlc_mutex_unlock( &structure_lock );
1216
1217     free( p_list->p_values );
1218     free( p_list );
1219 }
1220
1221 /* Following functions are local */
1222
1223 /*****************************************************************************
1224  * FindIndex: find the index of an object in an array of objects
1225  *****************************************************************************
1226  * This function assumes that p_this can be found in pp_objects. It will not
1227  * crash if p_this cannot be found, but will return a wrong value. It is your
1228  * duty to check the return value if you are not certain that the object could
1229  * be found for sure.
1230  *****************************************************************************/
1231 static int FindIndex( vlc_object_t *p_this,
1232                       vlc_object_t **pp_objects, int i_count )
1233 {
1234     int i_middle = i_count / 2;
1235
1236     if( i_count == 0 )
1237     {
1238         return 0;
1239     }
1240
1241     if( pp_objects[i_middle] == p_this )
1242     {
1243         return i_middle;
1244     }
1245
1246     if( i_count == 1 )
1247     {
1248         return 0;
1249     }
1250
1251     /* We take advantage of the sorted array */
1252     if( pp_objects[i_middle]->i_object_id < p_this->i_object_id )
1253     {
1254         return i_middle + FindIndex( p_this, pp_objects + i_middle,
1255                                              i_count - i_middle );
1256     }
1257     else
1258     {
1259         return FindIndex( p_this, pp_objects, i_middle );
1260     }
1261 }
1262
1263 static vlc_object_t * FindObject( vlc_object_t *p_this, int i_type, int i_mode )
1264 {
1265     int i;
1266     vlc_object_t *p_tmp;
1267
1268     switch( i_mode & 0x000f )
1269     {
1270     case FIND_PARENT:
1271         p_tmp = p_this->p_parent;
1272         if( p_tmp )
1273         {
1274             if( p_tmp->i_object_type == i_type )
1275             {
1276                 p_tmp->p_internals->i_refcount++;
1277                 return p_tmp;
1278             }
1279             else
1280             {
1281                 return FindObject( p_tmp, i_type, i_mode );
1282             }
1283         }
1284         break;
1285
1286     case FIND_CHILD:
1287         for( i = p_this->i_children; i--; )
1288         {
1289             p_tmp = p_this->pp_children[i];
1290             if( p_tmp->i_object_type == i_type )
1291             {
1292                 p_tmp->p_internals->i_refcount++;
1293                 return p_tmp;
1294             }
1295             else if( p_tmp->i_children )
1296             {
1297                 p_tmp = FindObject( p_tmp, i_type, i_mode );
1298                 if( p_tmp )
1299                 {
1300                     return p_tmp;
1301                 }
1302             }
1303         }
1304         break;
1305
1306     case FIND_ANYWHERE:
1307         /* Handled in vlc_object_find */
1308         break;
1309     }
1310
1311     return NULL;
1312 }
1313
1314 static vlc_object_t * FindObjectName( vlc_object_t *p_this,
1315                                       const char *psz_name,
1316                                       int i_mode )
1317 {
1318     int i;
1319     vlc_object_t *p_tmp;
1320
1321     switch( i_mode & 0x000f )
1322     {
1323     case FIND_PARENT:
1324         p_tmp = p_this->p_parent;
1325         if( p_tmp )
1326         {
1327             if( p_tmp->psz_object_name
1328                 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1329             {
1330                 p_tmp->p_internals->i_refcount++;
1331                 return p_tmp;
1332             }
1333             else
1334             {
1335                 return FindObjectName( p_tmp, psz_name, i_mode );
1336             }
1337         }
1338         break;
1339
1340     case FIND_CHILD:
1341         for( i = p_this->i_children; i--; )
1342         {
1343             p_tmp = p_this->pp_children[i];
1344             if( p_tmp->psz_object_name
1345                 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1346             {
1347                 p_tmp->p_internals->i_refcount++;
1348                 return p_tmp;
1349             }
1350             else if( p_tmp->i_children )
1351             {
1352                 p_tmp = FindObjectName( p_tmp, psz_name, i_mode );
1353                 if( p_tmp )
1354                 {
1355                     return p_tmp;
1356                 }
1357             }
1358         }
1359         break;
1360
1361     case FIND_ANYWHERE:
1362         /* Handled in vlc_object_find */
1363         break;
1364     }
1365
1366     return NULL;
1367 }
1368
1369 static void DetachObject( vlc_object_t *p_this )
1370 {
1371     vlc_object_t *p_parent = p_this->p_parent;
1372     int i_index, i;
1373
1374     /* Remove p_this's parent */
1375     p_this->p_parent = NULL;
1376
1377     /* Remove all of p_parent's children which are p_this */
1378     for( i_index = p_parent->i_children ; i_index-- ; )
1379     {
1380         if( p_parent->pp_children[i_index] == p_this )
1381         {
1382             p_parent->i_children--;
1383             for( i = i_index ; i < p_parent->i_children ; i++ )
1384             {
1385                 p_parent->pp_children[i] = p_parent->pp_children[i+1];
1386             }
1387         }
1388     }
1389
1390     if( p_parent->i_children )
1391     {
1392         p_parent->pp_children = (vlc_object_t **)realloc( p_parent->pp_children,
1393                                p_parent->i_children * sizeof(vlc_object_t *) );
1394     }
1395     else
1396     {
1397         free( p_parent->pp_children );
1398         p_parent->pp_children = NULL;
1399     }
1400 }
1401
1402 /*****************************************************************************
1403  * SetAttachment: recursively set the b_attached flag of a subtree.
1404  *****************************************************************************
1405  * This function is used by the attach and detach functions to propagate
1406  * the b_attached flag in a subtree.
1407  *****************************************************************************/
1408 static void SetAttachment( vlc_object_t *p_this, vlc_bool_t b_attached )
1409 {
1410     int i_index;
1411
1412     for( i_index = p_this->i_children ; i_index-- ; )
1413     {
1414         SetAttachment( p_this->pp_children[i_index], b_attached );
1415     }
1416
1417     p_this->p_internals->b_attached = b_attached;
1418 }
1419
1420 static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
1421 {
1422     char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
1423          psz_parent[20];
1424
1425     psz_name[0] = '\0';
1426     if( p_this->psz_object_name )
1427     {
1428         snprintf( psz_name, 49, " \"%s\"", p_this->psz_object_name );
1429         if( psz_name[48] )
1430             psz_name[48] = '\"';
1431     }
1432
1433     psz_children[0] = '\0';
1434     switch( p_this->i_children )
1435     {
1436         case 0:
1437             break;
1438         case 1:
1439             strcpy( psz_children, ", 1 child" );
1440             break;
1441         default:
1442             snprintf( psz_children, 19, ", %i children", p_this->i_children );
1443             break;
1444     }
1445
1446     psz_refcount[0] = '\0';
1447     if( p_this->p_internals->i_refcount > 0 )
1448         snprintf( psz_refcount, 19, ", refcount %u",
1449                   p_this->p_internals->i_refcount );
1450
1451     psz_thread[0] = '\0';
1452     if( p_this->p_internals->b_thread )
1453         snprintf( psz_thread, 29, " (thread %u)",
1454 #if defined(WIN32) || defined(UNDER_CE)
1455                   (unsigned)p_this->p_internals->thread_id.id );
1456 #else
1457                   (unsigned)p_this->p_internals->thread_id );
1458 #endif
1459
1460     psz_parent[0] = '\0';
1461     if( p_this->p_parent )
1462         snprintf( psz_parent, 19, ", parent %i", p_this->p_parent->i_object_id );
1463
1464     printf( " %so %.8i %s%s%s%s%s%s\n", psz_prefix,
1465             p_this->i_object_id, p_this->psz_object_type,
1466             psz_name, psz_thread, psz_refcount, psz_children,
1467             psz_parent );
1468 }
1469
1470 static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
1471 {
1472     int i;
1473     char i_back = psz_foo[i_level];
1474     psz_foo[i_level] = '\0';
1475
1476     PrintObject( p_this, psz_foo );
1477
1478     psz_foo[i_level] = i_back;
1479
1480     if( i_level / 2 >= MAX_DUMPSTRUCTURE_DEPTH )
1481     {
1482         msg_Warn( p_this, "structure tree is too deep" );
1483         return;
1484     }
1485
1486     for( i = 0 ; i < p_this->i_children ; i++ )
1487     {
1488         if( i_level )
1489         {
1490             psz_foo[i_level-1] = ' ';
1491
1492             if( psz_foo[i_level-2] == '`' )
1493             {
1494                 psz_foo[i_level-2] = ' ';
1495             }
1496         }
1497
1498         if( i == p_this->i_children - 1 )
1499         {
1500             psz_foo[i_level] = '`';
1501         }
1502         else
1503         {
1504             psz_foo[i_level] = '|';
1505         }
1506
1507         psz_foo[i_level+1] = '-';
1508         psz_foo[i_level+2] = '\0';
1509
1510         DumpStructure( p_this->pp_children[i], i_level + 2, psz_foo );
1511     }
1512 }
1513
1514 static vlc_list_t * NewList( int i_count )
1515 {
1516     vlc_list_t * p_list = (vlc_list_t *)malloc( sizeof( vlc_list_t ) );
1517     if( p_list == NULL )
1518     {
1519         return NULL;
1520     }
1521
1522     p_list->i_count = i_count;
1523
1524     if( i_count == 0 )
1525     {
1526         p_list->p_values = NULL;
1527         return p_list;
1528     }
1529
1530     p_list->p_values = malloc( i_count * sizeof( vlc_value_t ) );
1531     if( p_list->p_values == NULL )
1532     {
1533         p_list->i_count = 0;
1534         return p_list;
1535     }
1536
1537     return p_list;
1538 }
1539
1540 static void ListReplace( vlc_list_t *p_list, vlc_object_t *p_object,
1541                          int i_index )
1542 {
1543     if( p_list == NULL || i_index >= p_list->i_count )
1544     {
1545         return;
1546     }
1547
1548     p_object->p_internals->i_refcount++;
1549
1550     p_list->p_values[i_index].p_object = p_object;
1551
1552     return;
1553 }
1554
1555 /*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
1556 {
1557     if( p_list == NULL )
1558     {
1559         return;
1560     }
1561
1562     p_list->p_values = realloc( p_list->p_values, (p_list->i_count + 1)
1563                                 * sizeof( vlc_value_t ) );
1564     if( p_list->p_values == NULL )
1565     {
1566         p_list->i_count = 0;
1567         return;
1568     }
1569
1570     p_object->p_internals->i_refcount++;
1571
1572     p_list->p_values[p_list->i_count].p_object = p_object;
1573     p_list->i_count++;
1574
1575     return;
1576 }*/
1577
1578 static int CountChildren( vlc_object_t *p_this, int i_type )
1579 {
1580     vlc_object_t *p_tmp;
1581     int i, i_count = 0;
1582
1583     for( i = 0; i < p_this->i_children; i++ )
1584     {
1585         p_tmp = p_this->pp_children[i];
1586
1587         if( p_tmp->i_object_type == i_type )
1588         {
1589             i_count++;
1590         }
1591
1592         if( p_tmp->i_children )
1593         {
1594             i_count += CountChildren( p_tmp, i_type );
1595         }
1596     }
1597
1598     return i_count;
1599 }
1600
1601 static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
1602 {
1603     vlc_object_t *p_tmp;
1604     int i;
1605
1606     for( i = 0; i < p_this->i_children; i++ )
1607     {
1608         p_tmp = p_this->pp_children[i];
1609
1610         if( p_tmp->i_object_type == i_type )
1611         {
1612             ListReplace( p_list, p_tmp, p_list->i_count++ );
1613         }
1614
1615         if( p_tmp->i_children )
1616         {
1617             ListChildren( p_list, p_tmp, i_type );
1618         }
1619     }
1620 }