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_xml.h"
  60 #include "vlc_osd.h"
  61 #include "vlc_meta.h"
  62
  63 #include "variables.h"
  64 #ifndef WIN32
  65 # include <unistd.h>
  66 #else
  67 # include <io.h>
  68 # include <fcntl.h>
  69 # include <errno.h> /* ENOSYS */
  70 #endif
  71 #include <assert.h>
  72
  73 /*****************************************************************************
  74  * Constants
  75  *****************************************************************************/
  76
  77 const vlc_destructor_t kVLCDestructor = NULL;
  78
  79 /*****************************************************************************
  80  * Local prototypes
  81  *****************************************************************************/
  82 static int  DumpCommand( vlc_object_t *, char const *,
  83                          vlc_value_t, vlc_value_t, void * );
  84
  85 static vlc_object_t * FindObject    ( vlc_object_t *, int, int );
  86 static vlc_object_t * FindObjectName( vlc_object_t *, const char *, int );
  87 static void           DetachObject  ( vlc_object_t * );
  88 static void           PrintObject   ( vlc_object_t *, const char * );
  89 static void           DumpStructure ( vlc_object_t *, int, char * );
  90 static int            FindIndex     ( vlc_object_t *, vlc_object_t **, int );
  91 static void           SetAttachment ( vlc_object_t *, vlc_bool_t );
  92
  93 static vlc_list_t   * NewList       ( int );
  94 static void           ListReplace   ( vlc_list_t *, vlc_object_t *, int );
  95 /*static void           ListAppend    ( vlc_list_t *, vlc_object_t * );*/
  96 static int            CountChildren ( vlc_object_t *, int );
  97 static void           ListChildren  ( vlc_list_t *, vlc_object_t *, int );
  98
  99 static void vlc_object_destroy( vlc_object_t *p_this );
 100 static void vlc_object_yield_locked( vlc_object_t *p_this );
 101
 102 /*****************************************************************************
 103  * Local structure lock
 104  *****************************************************************************/
 105 static vlc_mutex_t    structure_lock;
 106 static vlc_object_internals_t global_internals;
 107
 108 vlc_object_t *vlc_custom_create( vlc_object_t *p_this, size_t i_size,
 109                                  int i_type, const char *psz_type )
 110 {
 111     vlc_object_t *p_new;
 112     vlc_object_internals_t *p_priv;
 113
 114     if( i_type == VLC_OBJECT_GLOBAL )
 115     {
 116         p_new = p_this;
 117         p_priv = &global_internals;
 118         memset( p_priv, 0, sizeof( *p_priv ) );
 119     }
 120     else
 121     {
 122         p_priv = calloc( 1, sizeof( *p_priv ) + i_size );
 123         if( p_priv == NULL )
 124             return NULL;
 125
 126         p_new = (vlc_object_t *)(p_priv + 1);
 127     }
 128
 129     p_new->p_internals = p_priv;
 130     p_new->i_object_type = i_type;
 131     p_new->psz_object_type = psz_type;
 132
 133     p_new->psz_object_name = NULL;
 134
 135     p_new->b_die = VLC_FALSE;
 136     p_new->b_error = VLC_FALSE;
 137     p_new->b_dead = VLC_FALSE;
 138     p_priv->b_attached = VLC_FALSE;
 139     p_new->b_force = VLC_FALSE;
 140
 141     p_new->psz_header = NULL;
 142
 143     if( p_this->i_flags & OBJECT_FLAGS_NODBG )
 144         p_new->i_flags |= OBJECT_FLAGS_NODBG;
 145     if( p_this->i_flags & OBJECT_FLAGS_QUIET )
 146         p_new->i_flags |= OBJECT_FLAGS_QUIET;
 147     if( p_this->i_flags & OBJECT_FLAGS_NOINTERACT )
 148         p_new->i_flags |= OBJECT_FLAGS_NOINTERACT;
 149
 150     p_priv->p_vars = calloc( sizeof( variable_t ), 16 );
 151
 152     if( !p_priv->p_vars )
 153     {
 154         if( i_type != VLC_OBJECT_GLOBAL )
 155             free( p_priv );
 156         return NULL;
 157     }
 158
 159     if( i_type == VLC_OBJECT_GLOBAL )
 160     {
 161         /* If i_type is global, then p_new is actually p_libvlc_global */
 162         libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_new;
 163         p_new->p_libvlc = NULL;
 164
 165         p_libvlc_global->i_counter = 0;
 166         p_new->i_object_id = 0;
 167
 168         p_libvlc_global->i_objects = 1;
 169         p_libvlc_global->pp_objects = malloc( sizeof(vlc_object_t *) );
 170         p_libvlc_global->pp_objects[0] = p_new;
 171         p_priv->b_attached = VLC_TRUE;
 172     }
 173     else
 174     {
 175         libvlc_global_data_t *p_libvlc_global = vlc_global();
 176         if( i_type == VLC_OBJECT_LIBVLC )
 177         {
 178             p_new->p_libvlc = (libvlc_int_t*)p_new;
 179             p_priv->b_attached = VLC_TRUE;
 180         }
 181         else
 182         {
 183             p_new->p_libvlc = p_this->p_libvlc;
 184         }
 185
 186         vlc_mutex_lock( &structure_lock );
 187
 188         p_libvlc_global->i_counter++;
 189         p_new->i_object_id = p_libvlc_global->i_counter;
 190
 191         /* Wooohaa! If *this* fails, we're in serious trouble! Anyway it's
 192          * useless to try and recover anything if pp_objects gets smashed. */
 193         TAB_APPEND( p_libvlc_global->i_objects, p_libvlc_global->pp_objects,
 194                     p_new );
 195
 196         vlc_mutex_unlock( &structure_lock );
 197     }
 198
 199     p_priv->i_refcount = 1;
 200     p_priv->pf_destructor = kVLCDestructor;
 201     p_priv->b_thread = VLC_FALSE;
 202     p_new->p_parent = NULL;
 203     p_new->pp_children = NULL;
 204     p_new->i_children = 0;
 205
 206     p_new->p_private = NULL;
 207
 208     /* Initialize mutexes and condvars */
 209     vlc_mutex_init( p_new, &p_new->object_lock );
 210     vlc_cond_init( p_new, &p_new->object_wait );
 211     vlc_mutex_init( p_new, &p_priv->var_lock );
 212     vlc_spin_init( &p_priv->spin );
 213     p_priv->pipes[0] = p_priv->pipes[1] = -1;
 214
 215     if( i_type == VLC_OBJECT_GLOBAL )
 216     {
 217         vlc_mutex_init( p_new, &structure_lock );
 218     }
 219
 220     if( i_type == VLC_OBJECT_LIBVLC )
 221     {
 222         var_Create( p_new, "list", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
 223         var_AddCallback( p_new, "list", DumpCommand, NULL );
 224         var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
 225         var_AddCallback( p_new, "tree", DumpCommand, NULL );
 226         var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
 227         var_AddCallback( p_new, "vars", DumpCommand, NULL );
 228     }
 229
 230     return p_new;
 231 }
 232
 233
 234 /**
 235  * Allocates and initializes a vlc object.
 236  *
 237  * @param i_type known object type (all of them are negative integer values),
 238  *               or object byte size (always positive).
 239  *
 240  * @return the new object, or NULL on error.
 241  */
 242 void * __vlc_object_create( vlc_object_t *p_this, int i_type )
 243 {
 244     const char   * psz_type;
 245     size_t         i_size;
 246
 247     switch( i_type )
 248     {
 249         case VLC_OBJECT_GLOBAL:
 250             i_size = sizeof(libvlc_global_data_t);
 251             psz_type = "global";
 252             break;
 253         case VLC_OBJECT_LIBVLC:
 254             i_size = sizeof(libvlc_int_t);
 255             psz_type = "libvlc";
 256             break;
 257         case VLC_OBJECT_INTF:
 258             i_size = sizeof(intf_thread_t);
 259             psz_type = "interface";
 260             break;
 261         case VLC_OBJECT_DIALOGS:
 262             i_size = sizeof(intf_thread_t);
 263             psz_type = "dialogs";
 264             break;
 265         case VLC_OBJECT_PLAYLIST:
 266             i_size = sizeof(playlist_t);
 267             psz_type = "playlist";
 268             break;
 269         case VLC_OBJECT_SD:
 270             i_size = sizeof(services_discovery_t);
 271             psz_type = "services discovery";
 272             break;
 273         case VLC_OBJECT_INPUT:
 274             i_size = sizeof(input_thread_t);
 275             psz_type = "input";
 276             break;
 277         case VLC_OBJECT_DEMUX:
 278             i_size = sizeof(demux_t);
 279             psz_type = "demux";
 280             break;
 281         case VLC_OBJECT_ACCESS:
 282             i_size = sizeof(access_t);
 283             psz_type = "access";
 284             break;
 285         case VLC_OBJECT_DECODER:
 286             i_size = sizeof(decoder_t);
 287             psz_type = "decoder";
 288             break;
 289         case VLC_OBJECT_PACKETIZER:
 290             i_size = sizeof(decoder_t);
 291             psz_type = "packetizer";
 292             break;
 293         case VLC_OBJECT_ENCODER:
 294             i_size = sizeof(encoder_t);
 295             psz_type = "encoder";
 296             break;
 297         case VLC_OBJECT_FILTER:
 298             i_size = sizeof(filter_t);
 299             psz_type = "filter";
 300             break;
 301         case VLC_OBJECT_VOUT:
 302             i_size = sizeof(vout_thread_t);
 303             psz_type = "video output";
 304             break;
 305         case VLC_OBJECT_AOUT:
 306             i_size = sizeof(aout_instance_t);
 307             psz_type = "audio output";
 308             break;
 309         case VLC_OBJECT_SOUT:
 310             i_size = sizeof(sout_instance_t);
 311             psz_type = "stream output";
 312             break;
 313         case VLC_OBJECT_VLM:
 314             i_size = sizeof( vlm_t );
 315             psz_type = "vlm dameon";
 316             break;
 317         case VLC_OBJECT_XML:
 318             i_size = sizeof( xml_t );
 319             psz_type = "xml";
 320             break;
 321         case VLC_OBJECT_OPENGL:
 322             i_size = sizeof( vout_thread_t );
 323             psz_type = "opengl";
 324             break;
 325         case VLC_OBJECT_ANNOUNCE:
 326             i_size = sizeof( announce_handler_t );
 327             psz_type = "announce";
 328             break;
 329         case VLC_OBJECT_META_ENGINE:
 330             i_size = sizeof( meta_engine_t );
 331             psz_type = "meta engine";
 332             break;
 333         case VLC_OBJECT_OSDMENU:
 334             i_size = sizeof( osd_menu_t );
 335             psz_type = "osd menu";
 336             break;
 337         case VLC_OBJECT_INTERACTION:
 338             i_size = sizeof( interaction_t );
 339             psz_type = "interaction";
 340             break;
 341         default:
 342             i_size = i_type > (int)sizeof(vlc_object_t)
 343                          ? i_type : (int)sizeof(vlc_object_t);
 344             i_type = VLC_OBJECT_GENERIC;
 345             psz_type = "generic";
 346             break;
 347     }
 348
 349     return vlc_custom_create( p_this, i_size, i_type, psz_type );
 350 }
 351
 352
 353 /**
 354  ****************************************************************************
 355  * Set the destructor of a vlc object
 356  *
 357  * This function sets the destructor of the vlc object. It will be called
 358  * when the object is destroyed when the its refcount reaches 0.
 359  * (It is called by the internal function vlc_object_destroy())
 360  *****************************************************************************/
 361 void __vlc_object_set_destructor( vlc_object_t *p_this,
 362                                   vlc_destructor_t pf_destructor )
 363 {
 364     vlc_object_internals_t *p_priv = vlc_internals(p_this );
 365
 366     vlc_mutex_lock( &structure_lock );
 367     p_priv->pf_destructor = pf_destructor;
 368     vlc_mutex_unlock( &structure_lock );
 369 }
 370
 371 /**
 372  ****************************************************************************
 373  * Destroy a vlc object (Internal)
 374  *
 375  * This function destroys an object that has been previously allocated with
 376  * vlc_object_create. The object's refcount must be zero and it must not be
 377  * attached to other objects in any way.
 378  *****************************************************************************/
 379 static void vlc_object_destroy( vlc_object_t *p_this )
 380 {
 381     vlc_object_internals_t *p_priv = vlc_internals( p_this );
 382
 383     /* Automatically detach the object from its parents */
 384     if( p_this->p_parent ) vlc_object_detach( p_this );
 385
 386
 387     /* Send a kill to the object's thread if applicable */
 388     vlc_object_kill( p_this );
 389
 390     /* If we are running on a thread, wait until it ends */
 391     if( p_priv->b_thread )
 392         vlc_thread_join( p_this );
 393
 394     /* Call the custom "subclass" destructor */
 395     if( p_priv->pf_destructor )
 396         p_priv->pf_destructor( p_this );
 397
 398     /* Sanity checks */
 399     if( p_this->i_children )
 400     {
 401         int i;
 402
 403         fprintf( stderr,
 404                  "ERROR: cannot delete object (%i, %s) with %d children\n",
 405                  p_this->i_object_id, p_this->psz_object_name,
 406                  p_this->i_children );
 407
 408         for( i = 0; i < p_this->i_children; i++ )
 409         {
 410             fprintf( stderr,
 411                      "ERROR: Remaining children object "
 412                      "(id:%i, type:%s, name:%s)\n",
 413                      p_this->pp_children[i]->i_object_id,
 414                      p_this->pp_children[i]->psz_object_type,
 415                      p_this->pp_children[i]->psz_object_name );
 416         }
 417         fflush(stderr);
 418         abort();
 419     }
 420
 421     /* Destroy the associated variables, starting from the end so that
 422      * no memmove calls have to be done. */
 423     while( p_priv->i_vars )
 424     {
 425         var_Destroy( p_this, p_priv->p_vars[p_priv->i_vars - 1].psz_name );
 426     }
 427
 428     free( p_priv->p_vars );
 429     vlc_mutex_destroy( &p_priv->var_lock );
 430
 431     free( p_this->psz_header );
 432
 433     if( p_this->i_object_type == VLC_OBJECT_GLOBAL )
 434     {
 435         libvlc_global_data_t *p_global = (libvlc_global_data_t *)p_this;
 436
 437         /* Test for leaks */
 438         if( p_global->i_objects > 0 )
 439         {
 440             int i;
 441             for( i = 0; i < p_global->i_objects; i++ )
 442             {
 443                 /* We are leaking this object */
 444                 fprintf( stderr,
 445                          "ERROR: leaking object (id:%i, type:%s, name:%s)\n",
 446                          p_global->pp_objects[i]->i_object_id,
 447                          p_global->pp_objects[i]->psz_object_type,
 448                          p_global->pp_objects[i]->psz_object_name );
 449                 fflush(stderr);
 450             }
 451             /* Strongly abort, cause we want these to be fixed */
 452             abort();
 453         }
 454
 455         /* We are the global object ... no need to lock. */
 456         free( p_global->pp_objects );
 457         p_global->pp_objects = NULL;
 458
 459         vlc_mutex_destroy( &structure_lock );
 460     }
 461
 462 #if defined(WIN32) || defined(UNDER_CE)
 463     /* if object has an associated thread, close it now */
 464     if( p_priv->thread_id.hThread )
 465        CloseHandle(p_priv->thread_id.hThread);
 466 #endif
 467
 468     vlc_mutex_destroy( &p_this->object_lock );
 469     vlc_cond_destroy( &p_this->object_wait );
 470     vlc_spin_destroy( &p_priv->spin );
 471     if( p_priv->pipes[1] != -1 )
 472         close( p_priv->pipes[1] );
 473     if( p_priv->pipes[0] != -1 )
 474         close( p_priv->pipes[0] );
 475
 476     /* global is not dynamically allocated by vlc_object_create */
 477     if( p_this->i_object_type != VLC_OBJECT_GLOBAL )
 478         free( p_priv );
 479 }
 480
 481
 482 /** Inter-object signaling */
 483
 484 void __vlc_object_lock( vlc_object_t *obj )
 485 {
 486     vlc_mutex_lock( &obj->object_lock );
 487 }
 488
 489 void __vlc_object_unlock( vlc_object_t *obj )
 490 {
 491     vlc_assert_locked( &obj->object_lock );
 492     vlc_mutex_unlock( &obj->object_lock );
 493 }
 494
 495 #ifdef WIN32
 496 # include <winsock2.h>
 497 # include <ws2tcpip.h>
 498
 499 /**
 500  * select()-able pipes emulated using Winsock
 501  */
 502 static int pipe (int fd[2])
 503 {
 504     SOCKADDR_IN addr;
 505     int addrlen = sizeof (addr);
 506
 507     SOCKET l = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP), a,
 508            c = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
 509     if ((l == INVALID_SOCKET) || (c == INVALID_SOCKET))
 510         goto error;
 511
 512     memset (&addr, 0, sizeof (addr));
 513     addr.sin_family = AF_INET;
 514     addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
 515     if (bind (l, (PSOCKADDR)&addr, sizeof (addr))
 516      || getsockname (l, (PSOCKADDR)&addr, &addrlen)
 517      || listen (l, 1)
 518      || connect (c, (PSOCKADDR)&addr, addrlen))
 519         goto error;
 520
 521     a = accept (l, NULL, NULL);
 522     if (a == INVALID_SOCKET)
 523         goto error;
 524
 525     closesocket (l);
 526     //shutdown (a, 0);
 527     //shutdown (c, 1);
 528     fd[0] = c;
 529     fd[1] = a;
 530     return 0;
 531
 532 error:
 533     if (l != INVALID_SOCKET)
 534         closesocket (l);
 535     if (c != INVALID_SOCKET)
 536         closesocket (c);
 537     return -1;
 538 }
 539
 540 #undef  read
 541 #define read( a, b, c )  recv (a, b, c, 0)
 542 #undef  write
 543 #define write( a, b, c ) send (a, b, c, 0)
 544 #undef  close
 545 #define close( a )       closesocket (a)
 546 #endif /* WIN32 */
 547
 548 /**
 549  * Returns the readable end of a pipe that becomes readable once termination
 550  * of the object is requested (vlc_object_kill()).
 551  * This can be used to wake-up out of a select() or poll() event loop, such
 552  * typically when doing network I/O.
 553  *
 554  * Note that the pipe will remain the same for the lifetime of the object.
 555  * DO NOT read the pipe nor close it yourself. Ever.
 556  *
 557  * @param obj object that would be "killed"
 558  * @return a readable pipe descriptor, or -1 on error.
 559  */
 560 int __vlc_object_waitpipe( vlc_object_t *obj )
 561 {
 562     int pfd[2] = { -1, -1 };
 563     struct vlc_object_internals_t *internals = obj->p_internals;
 564     vlc_bool_t killed = VLC_FALSE;
 565
 566     vlc_spin_lock (&internals->spin);
 567     if (internals->pipes[0] == -1)
 568     {
 569         /* This can only ever happen if someone killed us without locking: */
 570         assert (internals->pipes[1] == -1);
 571         vlc_spin_unlock (&internals->spin);
 572
 573         if (pipe (pfd))
 574             return -1;
 575
 576         vlc_spin_lock (&internals->spin);
 577         if (internals->pipes[0] == -1)
 578         {
 579             internals->pipes[0] = pfd[0];
 580             internals->pipes[1] = pfd[1];
 581             pfd[0] = pfd[1] = -1;
 582         }
 583         killed = obj->b_die;
 584     }
 585     vlc_spin_unlock (&internals->spin);
 586
 587     if (killed)
 588     {
 589         /* Race condition: vlc_object_kill() already invoked! */
 590         int fd;
 591
 592         vlc_spin_lock (&internals->spin);
 593         fd = internals->pipes[1];
 594         internals->pipes[1] = -1;
 595         vlc_spin_unlock (&internals->spin);
 596
 597         msg_Dbg (obj, "waitpipe: object already dying");
 598         if (fd != -1)
 599             close (fd);
 600     }
 601
 602     /* Race condition: two threads call pipe() - unlikely */
 603     if (pfd[0] != -1)
 604         close (pfd[0]);
 605     if (pfd[1] != -1)
 606         close (pfd[1]);
 607
 608     return internals->pipes[0];
 609 }
 610
 611
 612 /**
 613  * Waits for the object to be signaled (using vlc_object_signal()).
 614  * If the object already has a signal pending, this function will return
 615  * immediately. It is asserted that the caller holds the object lock.
 616  *
 617  * @return true if the object is dying and should terminate.
 618  */
 619 vlc_bool_t __vlc_object_wait( vlc_object_t *obj )
 620 {
 621     vlc_assert_locked( &obj->object_lock );
 622     vlc_cond_wait( &obj->object_wait, &obj->object_lock );
 623     return obj->b_die;
 624 }
 625
 626
 627 /**
 628  * Waits for the object to be signaled (using vlc_object_signal()), or for
 629  * a timer to expire.
 630  * If the object already has a signal pending, this function will return
 631  * immediately. It is asserted that the caller holds the object lock.
 632  *
 633  * @return negative if the object is dying and should terminate,
 634  * positive if the the object has been signaled but is not dying,
 635  * 0 if timeout has been reached.
 636  */
 637 int __vlc_object_timedwait( vlc_object_t *obj, mtime_t deadline )
 638 {
 639     int v;
 640
 641     vlc_assert_locked( &obj->object_lock );
 642     v = vlc_cond_timedwait( &obj->object_wait, &obj->object_lock, deadline );
 643     if( v == 0 ) /* signaled */
 644         return obj->b_die ? -1 : 1;
 645     return 0;
 646 }
 647
 648
 649 /**
 650  * Checks whether an object has been "killed".
 651  * The object lock must be held.
 652  *
 653  * Typical code for an object thread could be:
 654  *
 655    vlc_object_lock (self);
 656    ...initialization...
 657    while (vlc_object_alive (self))
 658    {
 659        ...preprocessing...
 660
 661        if (vlc_object_wait (self))
 662            continue;
 663
 664        ...postprocessing...
 665    }
 666    ...deinitialization...
 667    vlc_object_unlock (self);
 668  *
 669  *
 670  * @return true iff the object has not been killed yet
 671  */
 672 vlc_bool_t __vlc_object_alive( vlc_object_t *obj )
 673 {
 674     vlc_assert_locked( &obj->object_lock );
 675     return !obj->b_die;
 676 }
 677
 678
 679 /**
 680  * Signals an object for which the lock is held.
 681  */
 682 void __vlc_object_signal_unlocked( vlc_object_t *obj )
 683 {
 684     vlc_assert_locked (&obj->object_lock);
 685     vlc_cond_signal( &obj->object_wait );
 686 }
 687
 688
 689 /**
 690  * Requests termination of an object.
 691  * If the object is LibVLC, also request to terminate all its children.
 692  */
 693 void __vlc_object_kill( vlc_object_t *p_this )
 694 {
 695     struct vlc_object_internals_t *internals = p_this->p_internals;
 696     int fd;
 697
 698     vlc_mutex_lock( &p_this->object_lock );
 699     p_this->b_die = VLC_TRUE;
 700
 701     vlc_spin_lock (&internals->spin);
 702     fd = internals->pipes[1];
 703     internals->pipes[1] = -1;
 704     vlc_spin_unlock (&internals->spin);
 705
 706     if( fd != -1 )
 707     {
 708         msg_Dbg (p_this, "waitpipe: object killed");
 709         close (fd);
 710     }
 711
 712     if( p_this->i_object_type == VLC_OBJECT_LIBVLC )
 713         for( int i = 0; i < p_this->i_children ; i++ )
 714             vlc_object_kill( p_this->pp_children[i] );
 715
 716     vlc_object_signal_unlocked( p_this );
 717     vlc_mutex_unlock( &p_this->object_lock );
 718 }
 719
 720
 721 /**
 722  * find an object given its ID
 723  *
 724  * This function looks for the object whose i_object_id field is i_id. We
 725  * use a dichotomy so that lookups are in log2(n).
 726  *****************************************************************************/
 727 void * vlc_object_get( int i_id )
 728 {
 729     int i_max, i_middle;
 730     vlc_object_t **pp_objects;
 731     libvlc_global_data_t *p_libvlc_global = vlc_global();
 732
 733     vlc_mutex_lock( &structure_lock );
 734
 735     pp_objects = p_libvlc_global->pp_objects;
 736
 737     /* Perform our dichotomy */
 738     for( i_max = p_libvlc_global->i_objects - 1 ; ; )
 739     {
 740         i_middle = i_max / 2;
 741
 742         if( pp_objects[i_middle]->i_object_id > i_id )
 743         {
 744             i_max = i_middle;
 745         }
 746         else if( pp_objects[i_middle]->i_object_id < i_id )
 747         {
 748             if( i_middle )
 749             {
 750                 pp_objects += i_middle;
 751                 i_max -= i_middle;
 752             }
 753             else
 754             {
 755                 /* This happens when there are only two remaining objects */
 756                 if( pp_objects[i_middle+1]->i_object_id == i_id
 757                     && pp_objects[i_middle+1]->p_internals->i_refcount > 0 )
 758                 {
 759                     vlc_object_yield_locked( pp_objects[i_middle+1] );
 760                     vlc_mutex_unlock( &structure_lock );
 761                     return pp_objects[i_middle+1];
 762                 }
 763                 break;
 764             }
 765         }
 766         else if( pp_objects[i_middle]->p_internals->i_refcount > 0 )
 767         {
 768             vlc_object_yield_locked( pp_objects[i_middle] );
 769             vlc_mutex_unlock( &structure_lock );
 770             return pp_objects[i_middle];
 771         }
 772
 773         if( i_max == 0 )
 774         {
 775             /* this means that i_max == i_middle, and since we have already
 776              * tested pp_objects[i_middle]), p_found is properly set. */
 777             break;
 778         }
 779     }
 780
 781     vlc_mutex_unlock( &structure_lock );
 782     return NULL;
 783 }
 784
 785 /**
 786  ****************************************************************************
 787  * find a typed object and increment its refcount
 788  *****************************************************************************
 789  * This function recursively looks for a given object type. i_mode can be one
 790  * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
 791  *****************************************************************************/
 792 void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
 793 {
 794     vlc_object_t *p_found;
 795
 796     vlc_mutex_lock( &structure_lock );
 797
 798     /* If we are of the requested type ourselves, don't look further */
 799     if( !(i_mode & FIND_STRICT) && p_this->i_object_type == i_type
 800         && p_this->p_internals->i_refcount > 0 )
 801     {
 802         vlc_object_yield_locked( p_this );
 803         vlc_mutex_unlock( &structure_lock );
 804         return p_this;
 805     }
 806
 807     /* Otherwise, recursively look for the object */
 808     if( (i_mode & 0x000f) == FIND_ANYWHERE )
 809     {
 810         vlc_object_t *p_root = p_this;
 811
 812         /* Find the root */
 813         while( p_root->p_parent != NULL &&
 814                p_root != VLC_OBJECT( p_this->p_libvlc ) )
 815         {
 816             p_root = p_root->p_parent;
 817         }
 818
 819         p_found = FindObject( p_root, i_type, (i_mode & ~0x000f)|FIND_CHILD );
 820         if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
 821         {
 822             p_found = FindObject( VLC_OBJECT( p_this->p_libvlc ),
 823                                   i_type, (i_mode & ~0x000f)|FIND_CHILD );
 824         }
 825     }
 826     else
 827     {
 828         p_found = FindObject( p_this, i_type, i_mode );
 829     }
 830
 831     vlc_mutex_unlock( &structure_lock );
 832
 833     return p_found;
 834 }
 835
 836 /**
 837  ****************************************************************************
 838  * find a named object and increment its refcount
 839  *****************************************************************************
 840  * This function recursively looks for a given object name. i_mode can be one
 841  * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
 842  *****************************************************************************/
 843 void * __vlc_object_find_name( vlc_object_t *p_this, const char *psz_name,
 844                                int i_mode )
 845 {
 846     vlc_object_t *p_found;
 847
 848     vlc_mutex_lock( &structure_lock );
 849
 850     /* Avoid obvious freed object uses */
 851     assert( p_this->p_internals->i_refcount > 0 );
 852
 853     /* If have the requested name ourselves, don't look further */
 854     if( !(i_mode & FIND_STRICT)
 855         && p_this->psz_object_name
 856         && !strcmp( p_this->psz_object_name, psz_name )
 857         && p_this->p_internals->i_refcount > 0 )
 858     {
 859         vlc_object_yield_locked( p_this );
 860         vlc_mutex_unlock( &structure_lock );
 861         return p_this;
 862     }
 863
 864     /* Otherwise, recursively look for the object */
 865     if( (i_mode & 0x000f) == FIND_ANYWHERE )
 866     {
 867         vlc_object_t *p_root = p_this;
 868
 869         /* Find the root */
 870         while( p_root->p_parent != NULL &&
 871                p_root != VLC_OBJECT( p_this->p_libvlc ) )
 872         {
 873             p_root = p_root->p_parent;
 874         }
 875
 876         p_found = FindObjectName( p_root, psz_name,
 877                                  (i_mode & ~0x000f)|FIND_CHILD );
 878         if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
 879         {
 880             p_found = FindObjectName( VLC_OBJECT( p_this->p_libvlc ),
 881                                       psz_name, (i_mode & ~0x000f)|FIND_CHILD );
 882         }
 883     }
 884     else
 885     {
 886         p_found = FindObjectName( p_this, psz_name, i_mode );
 887     }
 888
 889     vlc_mutex_unlock( &structure_lock );
 890
 891     return p_found;
 892 }
 893
 894 /**
 895  ****************************************************************************
 896  * increment an object refcount
 897  *****************************************************************************/
 898
 899 /* When the structure_lock is locked */
 900 static void vlc_object_yield_locked( vlc_object_t *p_this )
 901 {
 902     vlc_assert_locked (&structure_lock);
 903
 904     /* Avoid obvious freed object uses */
 905     assert( p_this->p_internals->i_refcount > 0 );
 906
 907     /* Increment the counter */
 908     p_this->p_internals->i_refcount++;
 909 }
 910
 911 /* Public function */
 912 void __vlc_object_yield( vlc_object_t *p_this )
 913 {
 914     vlc_mutex_lock( &structure_lock );
 915     vlc_object_yield_locked( p_this );
 916     vlc_mutex_unlock( &structure_lock );
 917 }
 918
 919
 920 /*****************************************************************************
 921  * decrement an object refcount
 922  * And destroy the object if its refcount reach zero.
 923  *****************************************************************************/
 924 void __vlc_object_release( vlc_object_t *p_this )
 925 {
 926     vlc_bool_t b_should_destroy;
 927
 928     vlc_mutex_lock( &structure_lock );
 929
 930     assert( p_this->p_internals->i_refcount > 0 );
 931     p_this->p_internals->i_refcount--;
 932     b_should_destroy = (p_this->p_internals->i_refcount == 0);
 933
 934     if( b_should_destroy )
 935     {
 936         /* Make sure this object can't be obtained via vlc_find_object now that
 937          * it is freed */
 938         libvlc_global_data_t *p_libvlc_global = vlc_global();
 939         int i_index;
 940
 941         /* Wooohaa! If *this* fails, we're in serious trouble! Anyway it's
 942          * useless to try and recover anything if pp_objects gets smashed. */
 943         i_index = FindIndex( p_this, p_libvlc_global->pp_objects,
 944                              p_libvlc_global->i_objects );
 945         REMOVE_ELEM( p_libvlc_global->pp_objects,
 946                      p_libvlc_global->i_objects, i_index );
 947     }
 948
 949     vlc_mutex_unlock( &structure_lock );
 950
 951     if( b_should_destroy )
 952         vlc_object_destroy( p_this );
 953 }
 954
 955 /**
 956  ****************************************************************************
 957  * attach object to a parent object
 958  *****************************************************************************
 959  * This function sets p_this as a child of p_parent, and p_parent as a parent
 960  * of p_this. This link can be undone using vlc_object_detach.
 961  *****************************************************************************/
 962 void __vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
 963 {
 964     if( !p_this ) return;
 965
 966     vlc_mutex_lock( &structure_lock );
 967
 968     /* Avoid obvious freed object uses */
 969     assert( p_this->p_internals->i_refcount > 0 );
 970
 971     /* Attach the parent to its child */
 972     p_this->p_parent = p_parent;
 973
 974     /* Attach the child to its parent */
 975     INSERT_ELEM( p_parent->pp_children, p_parent->i_children,
 976                  p_parent->i_children, p_this );
 977
 978     /* Climb up the tree to see whether we are connected with the root */
 979     if( p_parent->p_internals->b_attached )
 980     {
 981         SetAttachment( p_this, VLC_TRUE );
 982     }
 983
 984     vlc_mutex_unlock( &structure_lock );
 985 }
 986
 987 /**
 988  ****************************************************************************
 989  * detach object from its parent
 990  *****************************************************************************
 991  * This function removes all links between an object and its parent.
 992  *****************************************************************************/
 993 void __vlc_object_detach( vlc_object_t *p_this )
 994 {
 995     if( !p_this ) return;
 996
 997     vlc_mutex_lock( &structure_lock );
 998
 999     if( !p_this->p_parent )
1000     {
1001         msg_Err( p_this, "object is not attached" );
1002         vlc_mutex_unlock( &structure_lock );
1003         return;
1004     }
1005
1006     /* Climb up the tree to see whether we are connected with the root */
1007     if( p_this->p_parent->p_internals->b_attached )
1008     {
1009         SetAttachment( p_this, VLC_FALSE );
1010     }
1011
1012     DetachObject( p_this );
1013     vlc_mutex_unlock( &structure_lock );
1014     p_this = NULL;
1015 }
1016
1017 /**
1018  ****************************************************************************
1019  * find a list typed objects and increment their refcount
1020  *****************************************************************************
1021  * This function recursively looks for a given object type. i_mode can be one
1022  * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
1023  *****************************************************************************/
1024 vlc_list_t * __vlc_list_find( vlc_object_t *p_this, int i_type, int i_mode )
1025 {
1026     vlc_list_t *p_list;
1027     vlc_object_t **pp_current, **pp_end;
1028     int i_count = 0, i_index = 0;
1029     libvlc_global_data_t *p_libvlc_global = vlc_global();
1030
1031     vlc_mutex_lock( &structure_lock );
1032
1033     /* Look for the objects */
1034     switch( i_mode & 0x000f )
1035     {
1036     case FIND_ANYWHERE:
1037         pp_current = p_libvlc_global->pp_objects;
1038         pp_end = pp_current + p_libvlc_global->i_objects;
1039
1040         for( ; pp_current < pp_end ; pp_current++ )
1041         {
1042             if( (*pp_current)->p_internals->b_attached
1043                  && (*pp_current)->i_object_type == i_type )
1044             {
1045                 i_count++;
1046             }
1047         }
1048
1049         p_list = NewList( i_count );
1050         pp_current = p_libvlc_global->pp_objects;
1051
1052         for( ; pp_current < pp_end ; pp_current++ )
1053         {
1054             if( (*pp_current)->p_internals->b_attached
1055                  && (*pp_current)->i_object_type == i_type )
1056             {
1057                 ListReplace( p_list, *pp_current, i_index );
1058                 if( i_index < i_count ) i_index++;
1059             }
1060         }
1061     break;
1062
1063     case FIND_CHILD:
1064         i_count = CountChildren( p_this, i_type );
1065         p_list = NewList( i_count );
1066
1067         /* Check allocation was successful */
1068         if( p_list->i_count != i_count )
1069         {
1070             msg_Err( p_this, "list allocation failed!" );
1071             p_list->i_count = 0;
1072             break;
1073         }
1074
1075         p_list->i_count = 0;
1076         ListChildren( p_list, p_this, i_type );
1077         break;
1078
1079     default:
1080         msg_Err( p_this, "unimplemented!" );
1081         p_list = NewList( 0 );
1082         break;
1083     }
1084
1085     vlc_mutex_unlock( &structure_lock );
1086
1087     return p_list;
1088 }
1089
1090 /*****************************************************************************
1091  * DumpCommand: print the current vlc structure
1092  *****************************************************************************
1093  * This function prints either an ASCII tree showing the connections between
1094  * vlc objects, and additional information such as their refcount, thread ID,
1095  * etc. (command "tree"), or the same data as a simple list (command "list").
1096  *****************************************************************************/
1097 static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
1098                         vlc_value_t oldval, vlc_value_t newval, void *p_data )
1099 {
1100     libvlc_global_data_t *p_libvlc_global = vlc_global();
1101
1102     (void)oldval; (void)p_data;
1103     if( *psz_cmd == 'l' )
1104     {
1105         vlc_mutex_lock( &structure_lock );
1106
1107         vlc_object_t **pp_current, **pp_end;
1108
1109         pp_current = p_libvlc_global->pp_objects;
1110         pp_end = pp_current + p_libvlc_global->i_objects;
1111
1112         for( ; pp_current < pp_end ; pp_current++ )
1113         {
1114             if( (*pp_current)->p_internals->b_attached )
1115             {
1116                 PrintObject( *pp_current, "" );
1117             }
1118             else
1119             {
1120                 printf( " o %.8i %s (not attached)\n",
1121                         (*pp_current)->i_object_id,
1122                         (*pp_current)->psz_object_type );
1123             }
1124         }
1125
1126         vlc_mutex_unlock( &structure_lock );
1127     }
1128     else
1129     {
1130         vlc_object_t *p_object = NULL;
1131
1132         if( *newval.psz_string )
1133         {
1134             char *end;
1135             int i_id = strtol( newval.psz_string, &end, 0 );
1136             if( end != newval.psz_string )
1137                 p_object = vlc_object_get( i_id );
1138             else
1139             {
1140                 /* try using the object's name to find it */
1141                 vlc_object_t *p_libvlc = vlc_object_get( 1 );
1142                 if( p_libvlc )
1143                 {
1144                     /* Look in p_libvlc's children tree */
1145                     p_object = vlc_object_find_name( p_libvlc,
1146                                                      newval.psz_string,
1147                                                      FIND_CHILD );
1148                     vlc_object_release( p_libvlc );
1149                 }
1150                 if( !p_object )
1151                 {
1152                     /* If it's not in libvlc, look in libvlc_global (== p_this) */
1153                     p_object = vlc_object_find_name( p_this,
1154                                                      newval.psz_string,
1155                                                      FIND_CHILD );
1156                 }
1157             }
1158
1159             if( !p_object )
1160             {
1161                 return VLC_ENOOBJ;
1162             }
1163         }
1164
1165         vlc_mutex_lock( &structure_lock );
1166
1167         if( *psz_cmd == 't' )
1168         {
1169             char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
1170
1171             if( !p_object )
1172                 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
1173
1174             psz_foo[0] = '|';
1175             DumpStructure( p_object, 0, psz_foo );
1176         }
1177         else if( *psz_cmd == 'v' )
1178         {
1179             int i;
1180
1181             if( !p_object )
1182                 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
1183
1184             PrintObject( p_object, "" );
1185
1186             if( !p_object->p_internals->i_vars )
1187                 printf( " `-o No variables\n" );
1188             for( i = 0; i < p_object->p_internals->i_vars; i++ )
1189             {
1190                 variable_t *p_var = p_object->p_internals->p_vars + i;
1191
1192                 const char *psz_type = "unknown";
1193                 switch( p_var->i_type & VLC_VAR_TYPE )
1194                 {
1195 #define MYCASE( type, nice )                \
1196                     case VLC_VAR_ ## type:  \
1197                         psz_type = nice;    \
1198                         break;
1199                     MYCASE( VOID, "void" );
1200                     MYCASE( BOOL, "bool" );
1201                     MYCASE( INTEGER, "integer" );
1202                     MYCASE( HOTKEY, "hotkey" );
1203                     MYCASE( STRING, "string" );
1204                     MYCASE( MODULE, "module" );
1205                     MYCASE( FILE, "file" );
1206                     MYCASE( DIRECTORY, "directory" );
1207                     MYCASE( VARIABLE, "variable" );
1208                     MYCASE( FLOAT, "float" );
1209                     MYCASE( TIME, "time" );
1210                     MYCASE( ADDRESS, "address" );
1211                     MYCASE( MUTEX, "mutex" );
1212                     MYCASE( LIST, "list" );
1213 #undef MYCASE
1214                 }
1215                 printf( " %c-o \"%s\" (%s",
1216                         i + 1 == p_object->p_internals->i_vars ? '`' : '|',
1217                         p_var->psz_name, psz_type );
1218                 if( p_var->psz_text )
1219                     printf( ", %s", p_var->psz_text );
1220                 printf( ")" );
1221                 if( p_var->i_type & VLC_VAR_ISCOMMAND )
1222                     printf( ", command" );
1223                 if( p_var->i_entries )
1224                     printf( ", %d callbacks", p_var->i_entries );
1225                 switch( p_var->i_type & 0x00f0 )
1226                 {
1227                     case VLC_VAR_VOID:
1228                     case VLC_VAR_MUTEX:
1229                         break;
1230                     case VLC_VAR_BOOL:
1231                         printf( ": %s", p_var->val.b_bool ? "true" : "false" );
1232                         break;
1233                     case VLC_VAR_INTEGER:
1234                         printf( ": %d", p_var->val.i_int );
1235                         break;
1236                     case VLC_VAR_STRING:
1237                         printf( ": \"%s\"", p_var->val.psz_string );
1238                         break;
1239                     case VLC_VAR_FLOAT:
1240                         printf( ": %f", p_var->val.f_float );
1241                         break;
1242                     case VLC_VAR_TIME:
1243                         printf( ": " I64Fi, (int64_t)p_var->val.i_time );
1244                         break;
1245                     case VLC_VAR_ADDRESS:
1246                         printf( ": %p", p_var->val.p_address );
1247                         break;
1248                     case VLC_VAR_LIST:
1249                         printf( ": TODO" );
1250                         break;
1251                 }
1252                 printf( "\n" );
1253             }
1254         }
1255
1256         vlc_mutex_unlock( &structure_lock );
1257
1258         if( *newval.psz_string )
1259         {
1260             vlc_object_release( p_object );
1261         }
1262     }
1263
1264     return VLC_SUCCESS;
1265 }
1266
1267 /*****************************************************************************
1268  * vlc_list_release: free a list previously allocated by vlc_list_find
1269  *****************************************************************************
1270  * This function decreases the refcount of all objects in the list and
1271  * frees the list.
1272  *****************************************************************************/
1273 void vlc_list_release( vlc_list_t *p_list )
1274 {
1275     int i_index;
1276
1277     for( i_index = 0; i_index < p_list->i_count; i_index++ )
1278     {
1279         vlc_object_release( p_list->p_values[i_index].p_object );
1280     }
1281
1282     free( p_list->p_values );
1283     free( p_list );
1284 }
1285
1286 /* Following functions are local */
1287
1288 /*****************************************************************************
1289  * FindIndex: find the index of an object in an array of objects
1290  *****************************************************************************
1291  * This function assumes that p_this can be found in pp_objects. It will not
1292  * crash if p_this cannot be found, but will return a wrong value. It is your
1293  * duty to check the return value if you are not certain that the object could
1294  * be found for sure.
1295  *****************************************************************************/
1296 static int FindIndex( vlc_object_t *p_this,
1297                       vlc_object_t **pp_objects, int i_count )
1298 {
1299     int i_middle = i_count / 2;
1300
1301     if( i_count == 0 )
1302     {
1303         return 0;
1304     }
1305
1306     if( pp_objects[i_middle] == p_this )
1307     {
1308         return i_middle;
1309     }
1310
1311     if( i_count == 1 )
1312     {
1313         return 0;
1314     }
1315
1316     /* We take advantage of the sorted array */
1317     if( pp_objects[i_middle]->i_object_id < p_this->i_object_id )
1318     {
1319         return i_middle + FindIndex( p_this, pp_objects + i_middle,
1320                                              i_count - i_middle );
1321     }
1322     else
1323     {
1324         return FindIndex( p_this, pp_objects, i_middle );
1325     }
1326 }
1327
1328 static vlc_object_t * FindObject( vlc_object_t *p_this, int i_type, int i_mode )
1329 {
1330     int i;
1331     vlc_object_t *p_tmp;
1332
1333     switch( i_mode & 0x000f )
1334     {
1335     case FIND_PARENT:
1336         p_tmp = p_this->p_parent;
1337         if( p_tmp )
1338         {
1339             if( p_tmp->i_object_type == i_type
1340                 && p_tmp->p_internals->i_refcount > 0 )
1341             {
1342                 vlc_object_yield_locked( p_tmp );
1343                 return p_tmp;
1344             }
1345             else
1346             {
1347                 return FindObject( p_tmp, i_type, i_mode );
1348             }
1349         }
1350         break;
1351
1352     case FIND_CHILD:
1353         for( i = p_this->i_children; i--; )
1354         {
1355             p_tmp = p_this->pp_children[i];
1356             if( p_tmp->i_object_type == i_type
1357                 && p_tmp->p_internals->i_refcount > 0 )
1358             {
1359                 vlc_object_yield_locked( p_tmp );
1360                 return p_tmp;
1361             }
1362             else if( p_tmp->i_children )
1363             {
1364                 p_tmp = FindObject( p_tmp, i_type, i_mode );
1365                 if( p_tmp )
1366                 {
1367                     return p_tmp;
1368                 }
1369             }
1370         }
1371         break;
1372
1373     case FIND_ANYWHERE:
1374         /* Handled in vlc_object_find */
1375         break;
1376     }
1377
1378     return NULL;
1379 }
1380
1381 static vlc_object_t * FindObjectName( vlc_object_t *p_this,
1382                                       const char *psz_name,
1383                                       int i_mode )
1384 {
1385     int i;
1386     vlc_object_t *p_tmp;
1387
1388     switch( i_mode & 0x000f )
1389     {
1390     case FIND_PARENT:
1391         p_tmp = p_this->p_parent;
1392         if( p_tmp )
1393         {
1394             if( p_tmp->psz_object_name
1395                 && !strcmp( p_tmp->psz_object_name, psz_name )
1396                 && p_tmp->p_internals->i_refcount > 0 )
1397             {
1398                 vlc_object_yield_locked( p_tmp );
1399                 return p_tmp;
1400             }
1401             else
1402             {
1403                 return FindObjectName( p_tmp, psz_name, i_mode );
1404             }
1405         }
1406         break;
1407
1408     case FIND_CHILD:
1409         for( i = p_this->i_children; i--; )
1410         {
1411             p_tmp = p_this->pp_children[i];
1412             if( p_tmp->psz_object_name
1413                 && !strcmp( p_tmp->psz_object_name, psz_name )
1414                 && p_tmp->p_internals->i_refcount > 0 )
1415             {
1416                 vlc_object_yield_locked( p_tmp );
1417                 return p_tmp;
1418             }
1419             else if( p_tmp->i_children )
1420             {
1421                 p_tmp = FindObjectName( p_tmp, psz_name, i_mode );
1422                 if( p_tmp )
1423                 {
1424                     return p_tmp;
1425                 }
1426             }
1427         }
1428         break;
1429
1430     case FIND_ANYWHERE:
1431         /* Handled in vlc_object_find */
1432         break;
1433     }
1434
1435     return NULL;
1436 }
1437
1438 static void DetachObject( vlc_object_t *p_this )
1439 {
1440     vlc_object_t *p_parent = p_this->p_parent;
1441     int i_index, i;
1442
1443     /* Remove p_this's parent */
1444     p_this->p_parent = NULL;
1445
1446     /* Remove all of p_parent's children which are p_this */
1447     for( i_index = p_parent->i_children ; i_index-- ; )
1448     {
1449         if( p_parent->pp_children[i_index] == p_this )
1450         {
1451             p_parent->i_children--;
1452             for( i = i_index ; i < p_parent->i_children ; i++ )
1453             {
1454                 p_parent->pp_children[i] = p_parent->pp_children[i+1];
1455             }
1456         }
1457     }
1458
1459     if( p_parent->i_children )
1460     {
1461         p_parent->pp_children = (vlc_object_t **)realloc( p_parent->pp_children,
1462                                p_parent->i_children * sizeof(vlc_object_t *) );
1463     }
1464     else
1465     {
1466         free( p_parent->pp_children );
1467         p_parent->pp_children = NULL;
1468     }
1469 }
1470
1471 /*****************************************************************************
1472  * SetAttachment: recursively set the b_attached flag of a subtree.
1473  *****************************************************************************
1474  * This function is used by the attach and detach functions to propagate
1475  * the b_attached flag in a subtree.
1476  *****************************************************************************/
1477 static void SetAttachment( vlc_object_t *p_this, vlc_bool_t b_attached )
1478 {
1479     int i_index;
1480
1481     for( i_index = p_this->i_children ; i_index-- ; )
1482     {
1483         SetAttachment( p_this->pp_children[i_index], b_attached );
1484     }
1485
1486     p_this->p_internals->b_attached = b_attached;
1487 }
1488
1489 static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
1490 {
1491     char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
1492          psz_parent[20];
1493
1494     psz_name[0] = '\0';
1495     if( p_this->psz_object_name )
1496     {
1497         snprintf( psz_name, 49, " \"%s\"", p_this->psz_object_name );
1498         if( psz_name[48] )
1499             psz_name[48] = '\"';
1500     }
1501
1502     psz_children[0] = '\0';
1503     switch( p_this->i_children )
1504     {
1505         case 0:
1506             break;
1507         case 1:
1508             strcpy( psz_children, ", 1 child" );
1509             break;
1510         default:
1511             snprintf( psz_children, 19, ", %i children", p_this->i_children );
1512             break;
1513     }
1514
1515     psz_refcount[0] = '\0';
1516     if( p_this->p_internals->i_refcount > 0 )
1517         snprintf( psz_refcount, 19, ", refcount %u",
1518                   p_this->p_internals->i_refcount );
1519
1520     psz_thread[0] = '\0';
1521     if( p_this->p_internals->b_thread )
1522         snprintf( psz_thread, 29, " (thread %u)",
1523 #if defined(WIN32) || defined(UNDER_CE)
1524                   (unsigned)p_this->p_internals->thread_id.id );
1525 #else
1526                   (unsigned)p_this->p_internals->thread_id );
1527 #endif
1528
1529     psz_parent[0] = '\0';
1530     if( p_this->p_parent )
1531         snprintf( psz_parent, 19, ", parent %i", p_this->p_parent->i_object_id );
1532
1533     printf( " %so %.8i %s%s%s%s%s%s\n", psz_prefix,
1534             p_this->i_object_id, p_this->psz_object_type,
1535             psz_name, psz_thread, psz_refcount, psz_children,
1536             psz_parent );
1537 }
1538
1539 static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
1540 {
1541     int i;
1542     char i_back = psz_foo[i_level];
1543     psz_foo[i_level] = '\0';
1544
1545     PrintObject( p_this, psz_foo );
1546
1547     psz_foo[i_level] = i_back;
1548
1549     if( i_level / 2 >= MAX_DUMPSTRUCTURE_DEPTH )
1550     {
1551         msg_Warn( p_this, "structure tree is too deep" );
1552         return;
1553     }
1554
1555     for( i = 0 ; i < p_this->i_children ; i++ )
1556     {
1557         if( i_level )
1558         {
1559             psz_foo[i_level-1] = ' ';
1560
1561             if( psz_foo[i_level-2] == '`' )
1562             {
1563                 psz_foo[i_level-2] = ' ';
1564             }
1565         }
1566
1567         if( i == p_this->i_children - 1 )
1568         {
1569             psz_foo[i_level] = '`';
1570         }
1571         else
1572         {
1573             psz_foo[i_level] = '|';
1574         }
1575
1576         psz_foo[i_level+1] = '-';
1577         psz_foo[i_level+2] = '\0';
1578
1579         DumpStructure( p_this->pp_children[i], i_level + 2, psz_foo );
1580     }
1581 }
1582
1583 static vlc_list_t * NewList( int i_count )
1584 {
1585     vlc_list_t * p_list = (vlc_list_t *)malloc( sizeof( vlc_list_t ) );
1586     if( p_list == NULL )
1587     {
1588         return NULL;
1589     }
1590
1591     p_list->i_count = i_count;
1592
1593     if( i_count == 0 )
1594     {
1595         p_list->p_values = NULL;
1596         return p_list;
1597     }
1598
1599     p_list->p_values = malloc( i_count * sizeof( vlc_value_t ) );
1600     if( p_list->p_values == NULL )
1601     {
1602         p_list->i_count = 0;
1603         return p_list;
1604     }
1605
1606     return p_list;
1607 }
1608
1609 static void ListReplace( vlc_list_t *p_list, vlc_object_t *p_object,
1610                          int i_index )
1611 {
1612     if( p_list == NULL || i_index >= p_list->i_count )
1613     {
1614         return;
1615     }
1616
1617     vlc_object_yield_locked( p_object );
1618
1619     p_list->p_values[i_index].p_object = p_object;
1620
1621     return;
1622 }
1623
1624 /*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
1625 {
1626     if( p_list == NULL )
1627     {
1628         return;
1629     }
1630
1631     p_list->p_values = realloc( p_list->p_values, (p_list->i_count + 1)
1632                                 * sizeof( vlc_value_t ) );
1633     if( p_list->p_values == NULL )
1634     {
1635         p_list->i_count = 0;
1636         return;
1637     }
1638
1639     vlc_object_yield_locked( p_object );
1640
1641     p_list->p_values[p_list->i_count].p_object = p_object;
1642     p_list->i_count++;
1643
1644     return;
1645 }*/
1646
1647 static int CountChildren( vlc_object_t *p_this, int i_type )
1648 {
1649     vlc_object_t *p_tmp;
1650     int i, i_count = 0;
1651
1652     for( i = 0; i < p_this->i_children; i++ )
1653     {
1654         p_tmp = p_this->pp_children[i];
1655
1656         if( p_tmp->i_object_type == i_type )
1657         {
1658             i_count++;
1659         }
1660
1661         if( p_tmp->i_children )
1662         {
1663             i_count += CountChildren( p_tmp, i_type );
1664         }
1665     }
1666
1667     return i_count;
1668 }
1669
1670 static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
1671 {
1672     vlc_object_t *p_tmp;
1673     int i;
1674
1675     for( i = 0; i < p_this->i_children; i++ )
1676     {
1677         p_tmp = p_this->pp_children[i];
1678
1679         if( p_tmp->i_object_type == i_type )
1680         {
1681             ListReplace( p_list, p_tmp, p_list->i_count++ );
1682         }
1683
1684         if( p_tmp->i_children )
1685         {
1686             ListChildren( p_list, p_tmp, i_type );
1687         }
1688     }
1689 }