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 static void vlc_object_destroy( vlc_object_t *p_this );
  96
  97 /*****************************************************************************
  98  * Local structure lock
  99  *****************************************************************************/
 100 static vlc_mutex_t    structure_lock;
 101 static vlc_object_internals_t global_internals;
 102
 103 vlc_object_t *vlc_custom_create( vlc_object_t *p_this, size_t i_size,
 104                                  int i_type, const char *psz_type )
 105 {
 106     vlc_object_t *p_new;
 107     vlc_object_internals_t *p_priv;
 108
 109     if( i_type == VLC_OBJECT_GLOBAL )
 110     {
 111         p_new = p_this;
 112         p_priv = &global_internals;
 113         memset( p_priv, 0, sizeof( *p_priv ) );
 114     }
 115     else
 116     {
 117         p_priv = calloc( 1, sizeof( *p_priv ) + i_size );
 118         if( p_priv == NULL )
 119             return NULL;
 120
 121         p_new = (vlc_object_t *)(p_priv + 1);
 122     }
 123
 124     p_new->p_internals = p_priv;
 125     p_new->i_object_type = i_type;
 126     p_new->psz_object_type = psz_type;
 127
 128     p_new->psz_object_name = NULL;
 129
 130     p_new->b_die = VLC_FALSE;
 131     p_new->b_error = VLC_FALSE;
 132     p_new->b_dead = VLC_FALSE;
 133     p_priv->b_attached = VLC_FALSE;
 134     p_new->b_force = VLC_FALSE;
 135
 136     p_new->psz_header = NULL;
 137
 138     if( p_this->i_flags & OBJECT_FLAGS_NODBG )
 139         p_new->i_flags |= OBJECT_FLAGS_NODBG;
 140     if( p_this->i_flags & OBJECT_FLAGS_QUIET )
 141         p_new->i_flags |= OBJECT_FLAGS_QUIET;
 142     if( p_this->i_flags & OBJECT_FLAGS_NOINTERACT )
 143         p_new->i_flags |= OBJECT_FLAGS_NOINTERACT;
 144
 145     p_priv->p_vars = calloc( sizeof( variable_t ), 16 );
 146
 147     if( !p_priv->p_vars )
 148     {
 149         if( i_type != VLC_OBJECT_GLOBAL )
 150             free( p_priv );
 151         return NULL;
 152     }
 153
 154     if( i_type == VLC_OBJECT_GLOBAL )
 155     {
 156         /* If i_type is global, then p_new is actually p_libvlc_global */
 157         libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_new;
 158         p_new->p_libvlc = NULL;
 159
 160         p_libvlc_global->i_counter = 0;
 161         p_new->i_object_id = 0;
 162
 163         p_libvlc_global->i_objects = 1;
 164         p_libvlc_global->pp_objects = malloc( sizeof(vlc_object_t *) );
 165         p_libvlc_global->pp_objects[0] = p_new;
 166         p_priv->b_attached = VLC_TRUE;
 167     }
 168     else
 169     {
 170         libvlc_global_data_t *p_libvlc_global = vlc_global();
 171         if( i_type == VLC_OBJECT_LIBVLC )
 172         {
 173             p_new->p_libvlc = (libvlc_int_t*)p_new;
 174             p_priv->b_attached = VLC_TRUE;
 175         }
 176         else
 177         {
 178             p_new->p_libvlc = p_this->p_libvlc;
 179         }
 180
 181         vlc_mutex_lock( &structure_lock );
 182
 183         p_libvlc_global->i_counter++;
 184         p_new->i_object_id = p_libvlc_global->i_counter;
 185
 186         /* Wooohaa! If *this* fails, we're in serious trouble! Anyway it's
 187          * useless to try and recover anything if pp_objects gets smashed. */
 188         TAB_APPEND( p_libvlc_global->i_objects, p_libvlc_global->pp_objects,
 189                     p_new );
 190
 191         vlc_mutex_unlock( &structure_lock );
 192     }
 193
 194     p_priv->i_refcount = 1;
 195     p_new->p_parent = NULL;
 196     p_new->pp_children = NULL;
 197     p_new->i_children = 0;
 198
 199     p_new->p_private = NULL;
 200
 201     /* Initialize mutexes and condvars */
 202     vlc_mutex_init( p_new, &p_new->object_lock );
 203     vlc_cond_init( p_new, &p_new->object_wait );
 204     vlc_mutex_init( p_new, &p_priv->var_lock );
 205     vlc_spin_init( &p_priv->spin );
 206     p_priv->pipes[0] = p_priv->pipes[1] = -1;
 207
 208     if( i_type == VLC_OBJECT_GLOBAL )
 209     {
 210         vlc_mutex_init( p_new, &structure_lock );
 211     }
 212
 213     if( i_type == VLC_OBJECT_LIBVLC )
 214     {
 215         var_Create( p_new, "list", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
 216         var_AddCallback( p_new, "list", DumpCommand, NULL );
 217         var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
 218         var_AddCallback( p_new, "tree", DumpCommand, NULL );
 219         var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
 220         var_AddCallback( p_new, "vars", DumpCommand, NULL );
 221     }
 222
 223     return p_new;
 224 }
 225
 226
 227 /**
 228  * Allocates and initializes a vlc object.
 229  *
 230  * @param i_type known object type (all of them are negative integer values),
 231  *               or object byte size (always positive).
 232  *
 233  * @return the new object, or NULL on error.
 234  */
 235 void * __vlc_object_create( vlc_object_t *p_this, int i_type )
 236 {
 237     const char   * psz_type;
 238     size_t         i_size;
 239
 240     switch( i_type )
 241     {
 242         case VLC_OBJECT_GLOBAL:
 243             i_size = sizeof(libvlc_global_data_t);
 244             psz_type = "global";
 245             break;
 246         case VLC_OBJECT_LIBVLC:
 247             i_size = sizeof(libvlc_int_t);
 248             psz_type = "libvlc";
 249             break;
 250         case VLC_OBJECT_INTF:
 251             i_size = sizeof(intf_thread_t);
 252             psz_type = "interface";
 253             break;
 254         case VLC_OBJECT_DIALOGS:
 255             i_size = sizeof(intf_thread_t);
 256             psz_type = "dialogs";
 257             break;
 258         case VLC_OBJECT_PLAYLIST:
 259             i_size = sizeof(playlist_t);
 260             psz_type = "playlist";
 261             break;
 262         case VLC_OBJECT_SD:
 263             i_size = sizeof(services_discovery_t);
 264             psz_type = "services discovery";
 265             break;
 266         case VLC_OBJECT_INPUT:
 267             i_size = sizeof(input_thread_t);
 268             psz_type = "input";
 269             break;
 270         case VLC_OBJECT_DEMUX:
 271             i_size = sizeof(demux_t);
 272             psz_type = "demux";
 273             break;
 274         case VLC_OBJECT_ACCESS:
 275             i_size = sizeof(access_t);
 276             psz_type = "access";
 277             break;
 278         case VLC_OBJECT_DECODER:
 279             i_size = sizeof(decoder_t);
 280             psz_type = "decoder";
 281             break;
 282         case VLC_OBJECT_PACKETIZER:
 283             i_size = sizeof(decoder_t);
 284             psz_type = "packetizer";
 285             break;
 286         case VLC_OBJECT_ENCODER:
 287             i_size = sizeof(encoder_t);
 288             psz_type = "encoder";
 289             break;
 290         case VLC_OBJECT_FILTER:
 291             i_size = sizeof(filter_t);
 292             psz_type = "filter";
 293             break;
 294         case VLC_OBJECT_VOUT:
 295             i_size = sizeof(vout_thread_t);
 296             psz_type = "video output";
 297             break;
 298         case VLC_OBJECT_SPU:
 299             i_size = sizeof(spu_t);
 300             psz_type = "subpicture";
 301             break;
 302         case VLC_OBJECT_AOUT:
 303             i_size = sizeof(aout_instance_t);
 304             psz_type = "audio output";
 305             break;
 306         case VLC_OBJECT_SOUT:
 307             i_size = sizeof(sout_instance_t);
 308             psz_type = "stream output";
 309             break;
 310         case VLC_OBJECT_VLM:
 311             i_size = sizeof( vlm_t );
 312             psz_type = "vlm dameon";
 313             break;
 314         case VLC_OBJECT_VOD:
 315             i_size = sizeof( vod_t );
 316             psz_type = "vod server";
 317             break;
 318         case VLC_OBJECT_XML:
 319             i_size = sizeof( xml_t );
 320             psz_type = "xml";
 321             break;
 322         case VLC_OBJECT_OPENGL:
 323             i_size = sizeof( vout_thread_t );
 324             psz_type = "opengl";
 325             break;
 326         case VLC_OBJECT_ANNOUNCE:
 327             i_size = sizeof( announce_handler_t );
 328             psz_type = "announce";
 329             break;
 330         case VLC_OBJECT_META_ENGINE:
 331             i_size = sizeof( meta_engine_t );
 332             psz_type = "meta engine";
 333             break;
 334         case VLC_OBJECT_OSDMENU:
 335             i_size = sizeof( osd_menu_t );
 336             psz_type = "osd menu";
 337             break;
 338         default:
 339             i_size = i_type > (int)sizeof(vlc_object_t)
 340                          ? i_type : (int)sizeof(vlc_object_t);
 341             i_type = VLC_OBJECT_GENERIC;
 342             psz_type = "generic";
 343             break;
 344     }
 345
 346     return vlc_custom_create( p_this, i_size, i_type, psz_type );
 347 }
 348
 349
 350 /**
 351  ****************************************************************************
 352  * Destroy a vlc object (Internal)
 353  *
 354  * This function destroys an object that has been previously allocated with
 355  * vlc_object_create. The object's refcount must be zero and it must not be
 356  * attached to other objects in any way.
 357  *****************************************************************************/
 358 static void vlc_object_destroy( vlc_object_t *p_this )
 359 {
 360     vlc_object_internals_t *p_priv = vlc_internals( p_this );
 361
 362     /* FIXME: ugly hack - we cannot use the message queue after
 363          * msg_Destroy(). */
 364     vlc_object_t *logger = p_this;
 365     if( (vlc_object_t *)p_this->p_libvlc == p_this )
 366         logger = NULL;
 367
 368     /* Sanity checks */
 369     if( p_this->i_children )
 370     {
 371         int i;
 372
 373         fprintf( stderr, "ERROR: cannot delete object (%i, %s) with %d children\n",
 374                           p_this->i_object_id, p_this->psz_object_name, p_this->i_children );
 375
 376         for( i = 0; i < p_this->i_children; i++ )
 377         {
 378             fprintf( stderr, "ERROR: Remaining children object (id:%i, type:%s, name:%s)\n",
 379                               p_this->pp_children[i]->i_object_id,
 380                               p_this->pp_children[i]->psz_object_type,
 381                               p_this->pp_children[i]->psz_object_name );
 382         }
 383         fflush(stderr);
 384         abort();
 385     }
 386
 387     if( p_this->p_parent )
 388     {
 389         fprintf( stderr, "ERROR: cannot delete object (id:%i, type:%s, name:%s) with a parent (id:%i, type:%s, name:%s)\n",
 390                           p_this->i_object_id,
 391                           p_this->psz_object_type,
 392                           p_this->psz_object_name,
 393                           p_this->p_parent->i_object_id,
 394                           p_this->p_parent->psz_object_type,
 395                           p_this->p_parent->psz_object_name );
 396         fflush(stderr);
 397         abort();
 398     }
 399
 400     /* Destroy the associated variables, starting from the end so that
 401      * no memmove calls have to be done. */
 402     while( p_priv->i_vars )
 403     {
 404         var_Destroy( p_this, p_priv->p_vars[p_priv->i_vars - 1].psz_name );
 405     }
 406
 407     free( p_priv->p_vars );
 408     vlc_mutex_destroy( &p_priv->var_lock );
 409
 410     if( p_this->psz_header ) free( p_this->psz_header );
 411
 412     if( p_this->i_object_type == VLC_OBJECT_GLOBAL )
 413     {
 414         libvlc_global_data_t *p_global = (libvlc_global_data_t *)p_this;
 415
 416         /* Test for leaks */
 417         if( p_global->i_objects > 0 )
 418         {
 419             int i;
 420             for( i = 0; i < p_global->i_objects; i++ )
 421             {
 422                 /* We are leaking this object */
 423                 fprintf( stderr,
 424                       "ERROR: We are leaking object (id:%i, type:%s, name:%s)\n",
 425                       p_global->pp_objects[i]->i_object_id,
 426                       p_global->pp_objects[i]->psz_object_type,
 427                       p_global->pp_objects[i]->psz_object_name );
 428                 fflush(stderr);
 429             }
 430             /* Strongly abort, cause we want these to be fixed */
 431             abort();
 432         }
 433
 434         /* We are the global object ... no need to lock. */
 435         free( p_global->pp_objects );
 436         p_global->pp_objects = NULL;
 437
 438         vlc_mutex_destroy( &structure_lock );
 439     }
 440
 441 #if defined(WIN32) || defined(UNDER_CE)
 442     /* if object has an associated thread, close it now */
 443     if( p_priv->thread_id.hThread )
 444        CloseHandle(p_priv->thread_id.hThread);
 445 #endif
 446
 447     vlc_mutex_destroy( &p_this->object_lock );
 448     vlc_cond_destroy( &p_this->object_wait );
 449     vlc_spin_destroy( &p_priv->spin );
 450     if( p_priv->pipes[1] != -1 )
 451         close( p_priv->pipes[1] );
 452     if( p_priv->pipes[0] != -1 )
 453         close( p_priv->pipes[0] );
 454
 455     /* global is not dynamically allocated by vlc_object_create */
 456     if( p_this->i_object_type != VLC_OBJECT_GLOBAL )
 457         free( p_priv );
 458 }
 459
 460
 461 /** Inter-object signaling */
 462
 463 void __vlc_object_lock( vlc_object_t *obj )
 464 {
 465     vlc_mutex_lock( &obj->object_lock );
 466 }
 467
 468 void __vlc_object_unlock( vlc_object_t *obj )
 469 {
 470     vlc_assert_locked( &obj->object_lock );
 471     vlc_mutex_unlock( &obj->object_lock );
 472 }
 473
 474 #ifdef WIN32
 475 # include <winsock2.h>
 476 # include <ws2tcpip.h>
 477
 478 /**
 479  * select()-able pipes emulated using Winsock
 480  */
 481 static int pipe (int fd[2])
 482 {
 483     SOCKADDR_IN addr;
 484     int addrlen = sizeof (addr);
 485
 486     SOCKET l = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP), a,
 487            c = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
 488     if ((l == INVALID_SOCKET) || (c == INVALID_SOCKET))
 489         goto error;
 490
 491     memset (&addr, 0, sizeof (addr));
 492     addr.sin_family = AF_INET;
 493     addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
 494     if (bind (l, (PSOCKADDR)&addr, sizeof (addr))
 495      || getsockname (l, (PSOCKADDR)&addr, &addrlen)
 496      || listen (l, 1)
 497      || connect (c, (PSOCKADDR)&addr, addrlen))
 498         goto error;
 499
 500     a = accept (l, NULL, NULL);
 501     if (a == INVALID_SOCKET)
 502         goto error;
 503
 504     closesocket (l);
 505     //shutdown (a, 0);
 506     //shutdown (c, 1);
 507     fd[0] = c;
 508     fd[1] = a;
 509     return 0;
 510
 511 error:
 512     if (l != INVALID_SOCKET)
 513         closesocket (l);
 514     if (c != INVALID_SOCKET)
 515         closesocket (c);
 516     return -1;
 517 }
 518
 519 #undef  read
 520 #define read( a, b, c )  recv (a, b, c, 0)
 521 #undef  write
 522 #define write( a, b, c ) send (a, b, c, 0)
 523 #undef  close
 524 #define close( a )       closesocket (a)
 525 #endif /* WIN32 */
 526
 527 /**
 528  * Returns the readable end of a pipe that becomes readable once termination
 529  * of the object is requested (vlc_object_kill()).
 530  * This can be used to wake-up out of a select() or poll() event loop, such
 531  * typically when doing network I/O.
 532  *
 533  * Note that the pipe will remain the same for the lifetime of the object.
 534  * DO NOT read the pipe nor close it yourself. Ever.
 535  *
 536  * @param obj object that would be "killed"
 537  * @return a readable pipe descriptor, or -1 on error.
 538  */
 539 int __vlc_object_waitpipe( vlc_object_t *obj )
 540 {
 541     int pfd[2] = { -1, -1 };
 542     struct vlc_object_internals_t *internals = obj->p_internals;
 543     vlc_bool_t killed = VLC_FALSE;
 544
 545     vlc_spin_lock (&internals->spin);
 546     if (internals->pipes[0] == -1)
 547     {
 548         /* This can only ever happen if someone killed us without locking: */
 549         assert (internals->pipes[1] == -1);
 550         vlc_spin_unlock (&internals->spin);
 551
 552         if (pipe (pfd))
 553             return -1;
 554
 555         vlc_spin_lock (&internals->spin);
 556         if (internals->pipes[0] == -1)
 557         {
 558             internals->pipes[0] = pfd[0];
 559             internals->pipes[1] = pfd[1];
 560             pfd[0] = pfd[1] = -1;
 561         }
 562         killed = obj->b_die;
 563     }
 564     vlc_spin_unlock (&internals->spin);
 565
 566     if (killed)
 567     {
 568         /* Race condition: vlc_object_kill() already invoked! */
 569         int fd;
 570
 571         vlc_spin_lock (&internals->spin);
 572         fd = internals->pipes[1];
 573         internals->pipes[1] = -1;
 574         vlc_spin_unlock (&internals->spin);
 575
 576         msg_Dbg (obj, "waitpipe: object already dying");
 577         if (fd != -1)
 578             close (fd);
 579     }
 580
 581     /* Race condition: two threads call pipe() - unlikely */
 582     if (pfd[0] != -1)
 583         close (pfd[0]);
 584     if (pfd[1] != -1)
 585         close (pfd[1]);
 586
 587     return internals->pipes[0];
 588 }
 589
 590
 591 /**
 592  * Waits for the object to be signaled (using vlc_object_signal()).
 593  * If the object already has a signal pending, this function will return
 594  * immediately. It is asserted that the caller holds the object lock.
 595  *
 596  * @return true if the object is dying and should terminate.
 597  */
 598 vlc_bool_t __vlc_object_wait( vlc_object_t *obj )
 599 {
 600     vlc_assert_locked( &obj->object_lock );
 601     vlc_cond_wait( &obj->object_wait, &obj->object_lock );
 602     return obj->b_die;
 603 }
 604
 605
 606 /**
 607  * Waits for the object to be signaled (using vlc_object_signal()), or for
 608  * a timer to expire.
 609  * If the object already has a signal pending, this function will return
 610  * immediately. It is asserted that the caller holds the object lock.
 611  *
 612  * @return negative if the object is dying and should terminate,
 613  * positive if the the object has been signaled but is not dying,
 614  * 0 if timeout has been reached.
 615  */
 616 int __vlc_object_timedwait( vlc_object_t *obj, mtime_t deadline )
 617 {
 618     int v;
 619
 620     vlc_assert_locked( &obj->object_lock );
 621     v = vlc_cond_timedwait( &obj->object_wait, &obj->object_lock, deadline );
 622     if( v == 0 ) /* signaled */
 623         return obj->b_die ? -1 : 1;
 624     return 0;
 625 }
 626
 627
 628 /**
 629  * Checks whether an object has been "killed".
 630  * The object lock must be held.
 631  *
 632  * Typical code for an object thread could be:
 633  *
 634    vlc_object_lock (self);
 635    ...initialization...
 636    while (vlc_object_alive (self))
 637    {
 638        ...preprocessing...
 639
 640        if (vlc_object_wait (self))
 641            continue;
 642
 643        ...postprocessing...
 644    }
 645    ...deinitialization...
 646    vlc_object_unlock (self);
 647  *
 648  *
 649  * @return true iff the object has not been killed yet
 650  */
 651 vlc_bool_t __vlc_object_alive( vlc_object_t *obj )
 652 {
 653     vlc_assert_locked( &obj->object_lock );
 654     return !obj->b_die;
 655 }
 656
 657
 658 /**
 659  * Signals an object for which the lock is held.
 660  */
 661 void __vlc_object_signal_unlocked( vlc_object_t *obj )
 662 {
 663     vlc_assert_locked (&obj->object_lock);
 664     vlc_cond_signal( &obj->object_wait );
 665 }
 666
 667
 668 /**
 669  * Requests termination of an object.
 670  * If the object is LibVLC, also request to terminate all its children.
 671  */
 672 void __vlc_object_kill( vlc_object_t *p_this )
 673 {
 674     struct vlc_object_internals_t *internals = p_this->p_internals;
 675     int fd;
 676
 677     vlc_mutex_lock( &p_this->object_lock );
 678     p_this->b_die = VLC_TRUE;
 679
 680     vlc_spin_lock (&internals->spin);
 681     fd = internals->pipes[1];
 682     internals->pipes[1] = -1;
 683     vlc_spin_unlock (&internals->spin);
 684
 685     if( fd != -1 )
 686     {
 687         msg_Dbg (p_this, "waitpipe: object killed");
 688         close (fd);
 689     }
 690
 691     if( p_this->i_object_type == VLC_OBJECT_LIBVLC )
 692         for( int i = 0; i < p_this->i_children ; i++ )
 693             vlc_object_kill( p_this->pp_children[i] );
 694
 695     vlc_object_signal_unlocked( p_this );
 696     vlc_mutex_unlock( &p_this->object_lock );
 697 }
 698
 699
 700 /**
 701  * find an object given its ID
 702  *
 703  * This function looks for the object whose i_object_id field is i_id. We
 704  * use a dichotomy so that lookups are in log2(n).
 705  *****************************************************************************/
 706 void * vlc_object_get( int i_id )
 707 {
 708     int i_max, i_middle;
 709     vlc_object_t **pp_objects;
 710     libvlc_global_data_t *p_libvlc_global = vlc_global();
 711
 712     vlc_mutex_lock( &structure_lock );
 713
 714     pp_objects = p_libvlc_global->pp_objects;
 715
 716     /* Perform our dichotomy */
 717     for( i_max = p_libvlc_global->i_objects - 1 ; ; )
 718     {
 719         i_middle = i_max / 2;
 720
 721         if( pp_objects[i_middle]->i_object_id > i_id )
 722         {
 723             i_max = i_middle;
 724         }
 725         else if( pp_objects[i_middle]->i_object_id < i_id )
 726         {
 727             if( i_middle )
 728             {
 729                 pp_objects += i_middle;
 730                 i_max -= i_middle;
 731             }
 732             else
 733             {
 734                 /* This happens when there are only two remaining objects */
 735                 if( pp_objects[i_middle+1]->i_object_id == i_id )
 736                 {
 737                     vlc_mutex_unlock( &structure_lock );
 738                     pp_objects[i_middle+1]->p_internals->i_refcount++;
 739                     return pp_objects[i_middle+1];
 740                 }
 741                 break;
 742             }
 743         }
 744         else
 745         {
 746             vlc_mutex_unlock( &structure_lock );
 747             pp_objects[i_middle]->p_internals->i_refcount++;
 748             return pp_objects[i_middle];
 749         }
 750
 751         if( i_max == 0 )
 752         {
 753             /* this means that i_max == i_middle, and since we have already
 754              * tested pp_objects[i_middle]), p_found is properly set. */
 755             break;
 756         }
 757     }
 758
 759     vlc_mutex_unlock( &structure_lock );
 760     return NULL;
 761 }
 762
 763 /**
 764  ****************************************************************************
 765  * find a typed object and increment its refcount
 766  *****************************************************************************
 767  * This function recursively looks for a given object type. i_mode can be one
 768  * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
 769  *****************************************************************************/
 770 void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
 771 {
 772     vlc_object_t *p_found;
 773
 774     vlc_mutex_lock( &structure_lock );
 775
 776     /* If we are of the requested type ourselves, don't look further */
 777     if( !(i_mode & FIND_STRICT) && p_this->i_object_type == i_type )
 778     {
 779         p_this->p_internals->i_refcount++;
 780         vlc_mutex_unlock( &structure_lock );
 781         return p_this;
 782     }
 783
 784     /* Otherwise, recursively look for the object */
 785     if( (i_mode & 0x000f) == FIND_ANYWHERE )
 786     {
 787         vlc_object_t *p_root = p_this;
 788
 789         /* Find the root */
 790         while( p_root->p_parent != NULL &&
 791                p_root != VLC_OBJECT( p_this->p_libvlc ) )
 792         {
 793             p_root = p_root->p_parent;
 794         }
 795
 796         p_found = FindObject( p_root, i_type, (i_mode & ~0x000f)|FIND_CHILD );
 797         if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
 798         {
 799             p_found = FindObject( VLC_OBJECT( p_this->p_libvlc ),
 800                                   i_type, (i_mode & ~0x000f)|FIND_CHILD );
 801         }
 802     }
 803     else
 804     {
 805         p_found = FindObject( p_this, i_type, i_mode );
 806     }
 807
 808     vlc_mutex_unlock( &structure_lock );
 809
 810     return p_found;
 811 }
 812
 813 /**
 814  ****************************************************************************
 815  * find a named object and increment its refcount
 816  *****************************************************************************
 817  * This function recursively looks for a given object name. i_mode can be one
 818  * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
 819  *****************************************************************************/
 820 void * __vlc_object_find_name( vlc_object_t *p_this, const char *psz_name,
 821                                int i_mode )
 822 {
 823     vlc_object_t *p_found;
 824
 825     vlc_mutex_lock( &structure_lock );
 826
 827     /* If have the requested name ourselves, don't look further */
 828     if( !(i_mode & FIND_STRICT)
 829         && p_this->psz_object_name
 830         && !strcmp( p_this->psz_object_name, psz_name ) )
 831     {
 832         p_this->p_internals->i_refcount++;
 833         vlc_mutex_unlock( &structure_lock );
 834         return p_this;
 835     }
 836
 837     /* Otherwise, recursively look for the object */
 838     if( (i_mode & 0x000f) == FIND_ANYWHERE )
 839     {
 840         vlc_object_t *p_root = p_this;
 841
 842         /* Find the root */
 843         while( p_root->p_parent != NULL &&
 844                p_root != VLC_OBJECT( p_this->p_libvlc ) )
 845         {
 846             p_root = p_root->p_parent;
 847         }
 848
 849         p_found = FindObjectName( p_root, psz_name,
 850                                  (i_mode & ~0x000f)|FIND_CHILD );
 851         if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
 852         {
 853             p_found = FindObjectName( VLC_OBJECT( p_this->p_libvlc ),
 854                                       psz_name, (i_mode & ~0x000f)|FIND_CHILD );
 855         }
 856     }
 857     else
 858     {
 859         p_found = FindObjectName( p_this, psz_name, i_mode );
 860     }
 861
 862     vlc_mutex_unlock( &structure_lock );
 863
 864     return p_found;
 865 }
 866
 867 /**
 868  ****************************************************************************
 869  * increment an object refcount
 870  *****************************************************************************/
 871 void __vlc_object_yield( vlc_object_t *p_this )
 872 {
 873     vlc_mutex_lock( &structure_lock );
 874     p_this->p_internals->i_refcount++;
 875     vlc_mutex_unlock( &structure_lock );
 876 }
 877
 878 /*****************************************************************************
 879  * decrement an object refcount
 880  * And destroy the object if its refcount reach zero.
 881  *****************************************************************************/
 882 void __vlc_object_release( vlc_object_t *p_this )
 883 {
 884     vlc_bool_t b_should_destroy;
 885
 886     vlc_mutex_lock( &structure_lock );
 887
 888     assert( p_this->p_internals->i_refcount > 0 );
 889     p_this->p_internals->i_refcount--;
 890     b_should_destroy = (p_this->p_internals->i_refcount == 0);
 891
 892     if( b_should_destroy )
 893     {
 894         /* Make sure this object can't be obtained via vlc_find_object now that
 895          * it is freed */
 896         libvlc_global_data_t *p_libvlc_global = vlc_global();
 897         int i_index;
 898
 899         /* Wooohaa! If *this* fails, we're in serious trouble! Anyway it's
 900          * useless to try and recover anything if pp_objects gets smashed. */
 901         i_index = FindIndex( p_this, p_libvlc_global->pp_objects,
 902                              p_libvlc_global->i_objects );
 903         REMOVE_ELEM( p_libvlc_global->pp_objects,
 904                      p_libvlc_global->i_objects, i_index );
 905     }
 906
 907     vlc_mutex_unlock( &structure_lock );
 908
 909     if( b_should_destroy )
 910         vlc_object_destroy( p_this );
 911 }
 912
 913 /**
 914  ****************************************************************************
 915  * attach object to a parent object
 916  *****************************************************************************
 917  * This function sets p_this as a child of p_parent, and p_parent as a parent
 918  * of p_this. This link can be undone using vlc_object_detach.
 919  *****************************************************************************/
 920 void __vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
 921 {
 922     if( !p_this ) return;
 923
 924     vlc_mutex_lock( &structure_lock );
 925
 926     /* Attach the parent to its child */
 927     p_this->p_parent = p_parent;
 928
 929     /* Attach the child to its parent */
 930     INSERT_ELEM( p_parent->pp_children, p_parent->i_children,
 931                  p_parent->i_children, p_this );
 932
 933     /* Climb up the tree to see whether we are connected with the root */
 934     if( p_parent->p_internals->b_attached )
 935     {
 936         SetAttachment( p_this, VLC_TRUE );
 937     }
 938
 939     vlc_mutex_unlock( &structure_lock );
 940 }
 941
 942 /**
 943  ****************************************************************************
 944  * detach object from its parent
 945  *****************************************************************************
 946  * This function removes all links between an object and its parent.
 947  *****************************************************************************/
 948 void __vlc_object_detach( vlc_object_t *p_this )
 949 {
 950     if( !p_this ) return;
 951
 952     vlc_mutex_lock( &structure_lock );
 953     if( !p_this->p_parent )
 954     {
 955         msg_Err( p_this, "object is not attached" );
 956         vlc_mutex_unlock( &structure_lock );
 957         return;
 958     }
 959
 960     /* Climb up the tree to see whether we are connected with the root */
 961     if( p_this->p_parent->p_internals->b_attached )
 962     {
 963         SetAttachment( p_this, VLC_FALSE );
 964     }
 965
 966     DetachObject( p_this );
 967     vlc_mutex_unlock( &structure_lock );
 968     p_this = NULL;
 969 }
 970
 971 /**
 972  ****************************************************************************
 973  * find a list typed objects and increment their refcount
 974  *****************************************************************************
 975  * This function recursively looks for a given object type. i_mode can be one
 976  * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
 977  *****************************************************************************/
 978 vlc_list_t * __vlc_list_find( vlc_object_t *p_this, int i_type, int i_mode )
 979 {
 980     vlc_list_t *p_list;
 981     vlc_object_t **pp_current, **pp_end;
 982     int i_count = 0, i_index = 0;
 983     libvlc_global_data_t *p_libvlc_global = vlc_global();
 984
 985     vlc_mutex_lock( &structure_lock );
 986
 987     /* Look for the objects */
 988     switch( i_mode & 0x000f )
 989     {
 990     case FIND_ANYWHERE:
 991         pp_current = p_libvlc_global->pp_objects;
 992         pp_end = pp_current + p_libvlc_global->i_objects;
 993
 994         for( ; pp_current < pp_end ; pp_current++ )
 995         {
 996             if( (*pp_current)->p_internals->b_attached
 997                  && (*pp_current)->i_object_type == i_type )
 998             {
 999                 i_count++;
1000             }
1001         }
1002
1003         p_list = NewList( i_count );
1004         pp_current = p_libvlc_global->pp_objects;
1005
1006         for( ; pp_current < pp_end ; pp_current++ )
1007         {
1008             if( (*pp_current)->p_internals->b_attached
1009                  && (*pp_current)->i_object_type == i_type )
1010             {
1011                 ListReplace( p_list, *pp_current, i_index );
1012                 if( i_index < i_count ) i_index++;
1013             }
1014         }
1015     break;
1016
1017     case FIND_CHILD:
1018         i_count = CountChildren( p_this, i_type );
1019         p_list = NewList( i_count );
1020
1021         /* Check allocation was successful */
1022         if( p_list->i_count != i_count )
1023         {
1024             msg_Err( p_this, "list allocation failed!" );
1025             p_list->i_count = 0;
1026             break;
1027         }
1028
1029         p_list->i_count = 0;
1030         ListChildren( p_list, p_this, i_type );
1031         break;
1032
1033     default:
1034         msg_Err( p_this, "unimplemented!" );
1035         p_list = NewList( 0 );
1036         break;
1037     }
1038
1039     vlc_mutex_unlock( &structure_lock );
1040
1041     return p_list;
1042 }
1043
1044 /*****************************************************************************
1045  * DumpCommand: print the current vlc structure
1046  *****************************************************************************
1047  * This function prints either an ASCII tree showing the connections between
1048  * vlc objects, and additional information such as their refcount, thread ID,
1049  * etc. (command "tree"), or the same data as a simple list (command "list").
1050  *****************************************************************************/
1051 static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
1052                         vlc_value_t oldval, vlc_value_t newval, void *p_data )
1053 {
1054     libvlc_global_data_t *p_libvlc_global = vlc_global();
1055
1056     (void)oldval; (void)p_data;
1057     if( *psz_cmd == 'l' )
1058     {
1059         vlc_mutex_lock( &structure_lock );
1060
1061         vlc_object_t **pp_current, **pp_end;
1062
1063         pp_current = p_libvlc_global->pp_objects;
1064         pp_end = pp_current + p_libvlc_global->i_objects;
1065
1066         for( ; pp_current < pp_end ; pp_current++ )
1067         {
1068             if( (*pp_current)->p_internals->b_attached )
1069             {
1070                 PrintObject( *pp_current, "" );
1071             }
1072             else
1073             {
1074                 printf( " o %.8i %s (not attached)\n",
1075                         (*pp_current)->i_object_id,
1076                         (*pp_current)->psz_object_type );
1077             }
1078         }
1079
1080         vlc_mutex_unlock( &structure_lock );
1081     }
1082     else
1083     {
1084         vlc_object_t *p_object = NULL;
1085
1086         if( *newval.psz_string )
1087         {
1088             char *end;
1089             int i_id = strtol( newval.psz_string, &end, 0 );
1090             if( end != newval.psz_string )
1091                 p_object = vlc_object_get( i_id );
1092             else
1093             {
1094                 /* try using the object's name to find it */
1095                 vlc_object_t *p_libvlc = vlc_object_get( 1 );
1096                 if( p_libvlc )
1097                 {
1098                     /* Look in p_libvlc's children tree */
1099                     p_object = vlc_object_find_name( p_libvlc,
1100                                                      newval.psz_string,
1101                                                      FIND_CHILD );
1102                     vlc_object_release( p_libvlc );
1103                 }
1104                 if( !p_object )
1105                 {
1106                     /* If it's not in libvlc, look in libvlc_global (== p_this) */
1107                     p_object = vlc_object_find_name( p_this,
1108                                                      newval.psz_string,
1109                                                      FIND_CHILD );
1110                 }
1111             }
1112
1113             if( !p_object )
1114             {
1115                 return VLC_ENOOBJ;
1116             }
1117         }
1118
1119         vlc_mutex_lock( &structure_lock );
1120
1121         if( *psz_cmd == 't' )
1122         {
1123             char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
1124
1125             if( !p_object )
1126                 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
1127
1128             psz_foo[0] = '|';
1129             DumpStructure( p_object, 0, psz_foo );
1130         }
1131         else if( *psz_cmd == 'v' )
1132         {
1133             int i;
1134
1135             if( !p_object )
1136                 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
1137
1138             PrintObject( p_object, "" );
1139
1140             if( !p_object->p_internals->i_vars )
1141                 printf( " `-o No variables\n" );
1142             for( i = 0; i < p_object->p_internals->i_vars; i++ )
1143             {
1144                 variable_t *p_var = p_object->p_internals->p_vars + i;
1145
1146                 const char *psz_type = "unknown";
1147                 switch( p_var->i_type & VLC_VAR_TYPE )
1148                 {
1149 #define MYCASE( type, nice )                \
1150                     case VLC_VAR_ ## type:  \
1151                         psz_type = nice;    \
1152                         break;
1153                     MYCASE( VOID, "void" );
1154                     MYCASE( BOOL, "bool" );
1155                     MYCASE( INTEGER, "integer" );
1156                     MYCASE( HOTKEY, "hotkey" );
1157                     MYCASE( STRING, "string" );
1158                     MYCASE( MODULE, "module" );
1159                     MYCASE( FILE, "file" );
1160                     MYCASE( DIRECTORY, "directory" );
1161                     MYCASE( VARIABLE, "variable" );
1162                     MYCASE( FLOAT, "float" );
1163                     MYCASE( TIME, "time" );
1164                     MYCASE( ADDRESS, "address" );
1165                     MYCASE( MUTEX, "mutex" );
1166                     MYCASE( LIST, "list" );
1167 #undef MYCASE
1168                 }
1169                 printf( " %c-o \"%s\" (%s",
1170                         i + 1 == p_object->p_internals->i_vars ? '`' : '|',
1171                         p_var->psz_name, psz_type );
1172                 if( p_var->psz_text )
1173                     printf( ", %s", p_var->psz_text );
1174                 printf( ")" );
1175                 if( p_var->i_type & VLC_VAR_ISCOMMAND )
1176                     printf( ", command" );
1177                 if( p_var->i_entries )
1178                     printf( ", %d callbacks", p_var->i_entries );
1179                 switch( p_var->i_type & 0x00f0 )
1180                 {
1181                     case VLC_VAR_VOID:
1182                     case VLC_VAR_MUTEX:
1183                         break;
1184                     case VLC_VAR_BOOL:
1185                         printf( ": %s", p_var->val.b_bool ? "true" : "false" );
1186                         break;
1187                     case VLC_VAR_INTEGER:
1188                         printf( ": %d", p_var->val.i_int );
1189                         break;
1190                     case VLC_VAR_STRING:
1191                         printf( ": \"%s\"", p_var->val.psz_string );
1192                         break;
1193                     case VLC_VAR_FLOAT:
1194                         printf( ": %f", p_var->val.f_float );
1195                         break;
1196                     case VLC_VAR_TIME:
1197                         printf( ": " I64Fi, (int64_t)p_var->val.i_time );
1198                         break;
1199                     case VLC_VAR_ADDRESS:
1200                         printf( ": %p", p_var->val.p_address );
1201                         break;
1202                     case VLC_VAR_LIST:
1203                         printf( ": TODO" );
1204                         break;
1205                 }
1206                 printf( "\n" );
1207             }
1208         }
1209
1210         vlc_mutex_unlock( &structure_lock );
1211
1212         if( *newval.psz_string )
1213         {
1214             vlc_object_release( p_object );
1215         }
1216     }
1217
1218     return VLC_SUCCESS;
1219 }
1220
1221 /*****************************************************************************
1222  * vlc_list_release: free a list previously allocated by vlc_list_find
1223  *****************************************************************************
1224  * This function decreases the refcount of all objects in the list and
1225  * frees the list.
1226  *****************************************************************************/
1227 void vlc_list_release( vlc_list_t *p_list )
1228 {
1229     int i_index;
1230
1231     for( i_index = 0; i_index < p_list->i_count; i_index++ )
1232     {
1233         vlc_object_release( p_list->p_values[i_index].p_object );
1234     }
1235
1236     free( p_list->p_values );
1237     free( p_list );
1238 }
1239
1240 /* Following functions are local */
1241
1242 /*****************************************************************************
1243  * FindIndex: find the index of an object in an array of objects
1244  *****************************************************************************
1245  * This function assumes that p_this can be found in pp_objects. It will not
1246  * crash if p_this cannot be found, but will return a wrong value. It is your
1247  * duty to check the return value if you are not certain that the object could
1248  * be found for sure.
1249  *****************************************************************************/
1250 static int FindIndex( vlc_object_t *p_this,
1251                       vlc_object_t **pp_objects, int i_count )
1252 {
1253     int i_middle = i_count / 2;
1254
1255     if( i_count == 0 )
1256     {
1257         return 0;
1258     }
1259
1260     if( pp_objects[i_middle] == p_this )
1261     {
1262         return i_middle;
1263     }
1264
1265     if( i_count == 1 )
1266     {
1267         return 0;
1268     }
1269
1270     /* We take advantage of the sorted array */
1271     if( pp_objects[i_middle]->i_object_id < p_this->i_object_id )
1272     {
1273         return i_middle + FindIndex( p_this, pp_objects + i_middle,
1274                                              i_count - i_middle );
1275     }
1276     else
1277     {
1278         return FindIndex( p_this, pp_objects, i_middle );
1279     }
1280 }
1281
1282 static vlc_object_t * FindObject( vlc_object_t *p_this, int i_type, int i_mode )
1283 {
1284     int i;
1285     vlc_object_t *p_tmp;
1286
1287     switch( i_mode & 0x000f )
1288     {
1289     case FIND_PARENT:
1290         p_tmp = p_this->p_parent;
1291         if( p_tmp )
1292         {
1293             if( p_tmp->i_object_type == i_type )
1294             {
1295                 p_tmp->p_internals->i_refcount++;
1296                 return p_tmp;
1297             }
1298             else
1299             {
1300                 return FindObject( p_tmp, i_type, i_mode );
1301             }
1302         }
1303         break;
1304
1305     case FIND_CHILD:
1306         for( i = p_this->i_children; i--; )
1307         {
1308             p_tmp = p_this->pp_children[i];
1309             if( p_tmp->i_object_type == i_type )
1310             {
1311                 p_tmp->p_internals->i_refcount++;
1312                 return p_tmp;
1313             }
1314             else if( p_tmp->i_children )
1315             {
1316                 p_tmp = FindObject( p_tmp, i_type, i_mode );
1317                 if( p_tmp )
1318                 {
1319                     return p_tmp;
1320                 }
1321             }
1322         }
1323         break;
1324
1325     case FIND_ANYWHERE:
1326         /* Handled in vlc_object_find */
1327         break;
1328     }
1329
1330     return NULL;
1331 }
1332
1333 static vlc_object_t * FindObjectName( vlc_object_t *p_this,
1334                                       const char *psz_name,
1335                                       int i_mode )
1336 {
1337     int i;
1338     vlc_object_t *p_tmp;
1339
1340     switch( i_mode & 0x000f )
1341     {
1342     case FIND_PARENT:
1343         p_tmp = p_this->p_parent;
1344         if( p_tmp )
1345         {
1346             if( p_tmp->psz_object_name
1347                 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1348             {
1349                 p_tmp->p_internals->i_refcount++;
1350                 return p_tmp;
1351             }
1352             else
1353             {
1354                 return FindObjectName( p_tmp, psz_name, i_mode );
1355             }
1356         }
1357         break;
1358
1359     case FIND_CHILD:
1360         for( i = p_this->i_children; i--; )
1361         {
1362             p_tmp = p_this->pp_children[i];
1363             if( p_tmp->psz_object_name
1364                 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1365             {
1366                 p_tmp->p_internals->i_refcount++;
1367                 return p_tmp;
1368             }
1369             else if( p_tmp->i_children )
1370             {
1371                 p_tmp = FindObjectName( p_tmp, psz_name, i_mode );
1372                 if( p_tmp )
1373                 {
1374                     return p_tmp;
1375                 }
1376             }
1377         }
1378         break;
1379
1380     case FIND_ANYWHERE:
1381         /* Handled in vlc_object_find */
1382         break;
1383     }
1384
1385     return NULL;
1386 }
1387
1388 static void DetachObject( vlc_object_t *p_this )
1389 {
1390     vlc_object_t *p_parent = p_this->p_parent;
1391     int i_index, i;
1392
1393     /* Remove p_this's parent */
1394     p_this->p_parent = NULL;
1395
1396     /* Remove all of p_parent's children which are p_this */
1397     for( i_index = p_parent->i_children ; i_index-- ; )
1398     {
1399         if( p_parent->pp_children[i_index] == p_this )
1400         {
1401             p_parent->i_children--;
1402             for( i = i_index ; i < p_parent->i_children ; i++ )
1403             {
1404                 p_parent->pp_children[i] = p_parent->pp_children[i+1];
1405             }
1406         }
1407     }
1408
1409     if( p_parent->i_children )
1410     {
1411         p_parent->pp_children = (vlc_object_t **)realloc( p_parent->pp_children,
1412                                p_parent->i_children * sizeof(vlc_object_t *) );
1413     }
1414     else
1415     {
1416         free( p_parent->pp_children );
1417         p_parent->pp_children = NULL;
1418     }
1419 }
1420
1421 /*****************************************************************************
1422  * SetAttachment: recursively set the b_attached flag of a subtree.
1423  *****************************************************************************
1424  * This function is used by the attach and detach functions to propagate
1425  * the b_attached flag in a subtree.
1426  *****************************************************************************/
1427 static void SetAttachment( vlc_object_t *p_this, vlc_bool_t b_attached )
1428 {
1429     int i_index;
1430
1431     for( i_index = p_this->i_children ; i_index-- ; )
1432     {
1433         SetAttachment( p_this->pp_children[i_index], b_attached );
1434     }
1435
1436     p_this->p_internals->b_attached = b_attached;
1437 }
1438
1439 static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
1440 {
1441     char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
1442          psz_parent[20];
1443
1444     psz_name[0] = '\0';
1445     if( p_this->psz_object_name )
1446     {
1447         snprintf( psz_name, 49, " \"%s\"", p_this->psz_object_name );
1448         if( psz_name[48] )
1449             psz_name[48] = '\"';
1450     }
1451
1452     psz_children[0] = '\0';
1453     switch( p_this->i_children )
1454     {
1455         case 0:
1456             break;
1457         case 1:
1458             strcpy( psz_children, ", 1 child" );
1459             break;
1460         default:
1461             snprintf( psz_children, 19, ", %i children", p_this->i_children );
1462             break;
1463     }
1464
1465     psz_refcount[0] = '\0';
1466     if( p_this->p_internals->i_refcount > 0 )
1467         snprintf( psz_refcount, 19, ", refcount %u",
1468                   p_this->p_internals->i_refcount );
1469
1470     psz_thread[0] = '\0';
1471     if( p_this->p_internals->b_thread )
1472         snprintf( psz_thread, 29, " (thread %u)",
1473 #if defined(WIN32) || defined(UNDER_CE)
1474                   (unsigned)p_this->p_internals->thread_id.id );
1475 #else
1476                   (unsigned)p_this->p_internals->thread_id );
1477 #endif
1478
1479     psz_parent[0] = '\0';
1480     if( p_this->p_parent )
1481         snprintf( psz_parent, 19, ", parent %i", p_this->p_parent->i_object_id );
1482
1483     printf( " %so %.8i %s%s%s%s%s%s\n", psz_prefix,
1484             p_this->i_object_id, p_this->psz_object_type,
1485             psz_name, psz_thread, psz_refcount, psz_children,
1486             psz_parent );
1487 }
1488
1489 static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
1490 {
1491     int i;
1492     char i_back = psz_foo[i_level];
1493     psz_foo[i_level] = '\0';
1494
1495     PrintObject( p_this, psz_foo );
1496
1497     psz_foo[i_level] = i_back;
1498
1499     if( i_level / 2 >= MAX_DUMPSTRUCTURE_DEPTH )
1500     {
1501         msg_Warn( p_this, "structure tree is too deep" );
1502         return;
1503     }
1504
1505     for( i = 0 ; i < p_this->i_children ; i++ )
1506     {
1507         if( i_level )
1508         {
1509             psz_foo[i_level-1] = ' ';
1510
1511             if( psz_foo[i_level-2] == '`' )
1512             {
1513                 psz_foo[i_level-2] = ' ';
1514             }
1515         }
1516
1517         if( i == p_this->i_children - 1 )
1518         {
1519             psz_foo[i_level] = '`';
1520         }
1521         else
1522         {
1523             psz_foo[i_level] = '|';
1524         }
1525
1526         psz_foo[i_level+1] = '-';
1527         psz_foo[i_level+2] = '\0';
1528
1529         DumpStructure( p_this->pp_children[i], i_level + 2, psz_foo );
1530     }
1531 }
1532
1533 static vlc_list_t * NewList( int i_count )
1534 {
1535     vlc_list_t * p_list = (vlc_list_t *)malloc( sizeof( vlc_list_t ) );
1536     if( p_list == NULL )
1537     {
1538         return NULL;
1539     }
1540
1541     p_list->i_count = i_count;
1542
1543     if( i_count == 0 )
1544     {
1545         p_list->p_values = NULL;
1546         return p_list;
1547     }
1548
1549     p_list->p_values = malloc( i_count * sizeof( vlc_value_t ) );
1550     if( p_list->p_values == NULL )
1551     {
1552         p_list->i_count = 0;
1553         return p_list;
1554     }
1555
1556     return p_list;
1557 }
1558
1559 static void ListReplace( vlc_list_t *p_list, vlc_object_t *p_object,
1560                          int i_index )
1561 {
1562     if( p_list == NULL || i_index >= p_list->i_count )
1563     {
1564         return;
1565     }
1566
1567     p_object->p_internals->i_refcount++;
1568
1569     p_list->p_values[i_index].p_object = p_object;
1570
1571     return;
1572 }
1573
1574 /*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
1575 {
1576     if( p_list == NULL )
1577     {
1578         return;
1579     }
1580
1581     p_list->p_values = realloc( p_list->p_values, (p_list->i_count + 1)
1582                                 * sizeof( vlc_value_t ) );
1583     if( p_list->p_values == NULL )
1584     {
1585         p_list->i_count = 0;
1586         return;
1587     }
1588
1589     p_object->p_internals->i_refcount++;
1590
1591     p_list->p_values[p_list->i_count].p_object = p_object;
1592     p_list->i_count++;
1593
1594     return;
1595 }*/
1596
1597 static int CountChildren( vlc_object_t *p_this, int i_type )
1598 {
1599     vlc_object_t *p_tmp;
1600     int i, i_count = 0;
1601
1602     for( i = 0; i < p_this->i_children; i++ )
1603     {
1604         p_tmp = p_this->pp_children[i];
1605
1606         if( p_tmp->i_object_type == i_type )
1607         {
1608             i_count++;
1609         }
1610
1611         if( p_tmp->i_children )
1612         {
1613             i_count += CountChildren( p_tmp, i_type );
1614         }
1615     }
1616
1617     return i_count;
1618 }
1619
1620 static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
1621 {
1622     vlc_object_t *p_tmp;
1623     int i;
1624
1625     for( i = 0; i < p_this->i_children; i++ )
1626     {
1627         p_tmp = p_this->pp_children[i];
1628
1629         if( p_tmp->i_object_type == i_type )
1630         {
1631             ListReplace( p_list, p_tmp, p_list->i_count++ );
1632         }
1633
1634         if( p_tmp->i_children )
1635         {
1636             ListChildren( p_list, p_tmp, i_type );
1637         }
1638     }
1639 }