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