1 /*****************************************************************************
2 * objects.c: vlc_object_t handling
3 *****************************************************************************
4 * Copyright (C) 2004-2008 the VideoLAN team
6 * Authors: Samuel Hocevar <sam@zoy.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
21 *****************************************************************************/
25 * This file contains the functions to handle the vlc_object_t type
27 * Unless otherwise stated, functions in this file are not cancellation point.
28 * All functions in this file are safe w.r.t. deferred cancellation.
32 /*****************************************************************************
34 *****************************************************************************/
39 #include <vlc_common.h>
41 #include "../libvlc.h"
43 #include "audio_output/aout_internal.h"
45 #include "vlc_interface.h"
46 #include "vlc_codec.h"
48 #include "variables.h"
54 # include <errno.h> /* ENOSYS */
59 #if defined (HAVE_SYS_EVENTFD_H)
60 # include <sys/eventfd.h>
61 # define HAVE_EVENTFD 1
65 /*****************************************************************************
67 *****************************************************************************/
68 static int DumpCommand( vlc_object_t *, char const *,
69 vlc_value_t, vlc_value_t, void * );
71 static vlc_object_t * FindObject ( vlc_object_t *, int, int );
72 static vlc_object_t * FindObjectName( vlc_object_t *, const char *, int );
73 static void PrintObject ( vlc_object_t *, const char * );
74 static void DumpStructure ( vlc_object_t *, int, char * );
76 static vlc_list_t * NewList ( int );
77 static void ListReplace ( vlc_list_t *, vlc_object_t *, int );
78 /*static void ListAppend ( vlc_list_t *, vlc_object_t * );*/
79 static int CountChildren ( vlc_object_t *, int );
80 static void ListChildren ( vlc_list_t *, vlc_object_t *, int );
82 static void vlc_object_destroy( vlc_object_t *p_this );
83 static void vlc_object_detach_unlocked (vlc_object_t *p_this);
85 static void vlc_object_dump( vlc_object_t *p_this );
88 /*****************************************************************************
89 * Local structure lock
90 *****************************************************************************/
91 static void libvlc_lock (libvlc_int_t *p_libvlc)
93 vlc_mutex_lock (&(libvlc_priv (p_libvlc)->structure_lock));
96 static void libvlc_unlock (libvlc_int_t *p_libvlc)
98 vlc_mutex_unlock (&(libvlc_priv (p_libvlc)->structure_lock));
101 void *__vlc_custom_create( vlc_object_t *p_this, size_t i_size,
102 int i_type, const char *psz_type )
105 vlc_object_internals_t *p_priv;
108 * VLC objects are laid out as follow:
109 * - first the LibVLC-private per-object data,
110 * - then VLC_COMMON members from vlc_object_t,
111 * - finally, the type-specific data (if any).
113 * This function initializes the LibVLC and common data,
114 * and zeroes the rest.
116 p_priv = calloc( 1, sizeof( *p_priv ) + i_size );
120 assert (i_size >= sizeof (vlc_object_t));
121 p_new = (vlc_object_t *)(p_priv + 1);
123 p_priv->i_object_type = i_type;
124 p_new->psz_object_type = psz_type;
125 p_new->psz_object_name = NULL;
127 p_new->b_die = false;
128 p_new->b_error = false;
129 p_new->b_force = false;
131 p_new->psz_header = NULL;
134 p_new->i_flags = p_this->i_flags
135 & (OBJECT_FLAGS_NODBG|OBJECT_FLAGS_QUIET|OBJECT_FLAGS_NOINTERACT);
137 p_priv->p_vars = calloc( 16, sizeof( variable_t ) );
139 if( !p_priv->p_vars )
147 libvlc_int_t *self = (libvlc_int_t*)p_new;
148 p_new->p_libvlc = self;
149 vlc_mutex_init (&(libvlc_priv (self)->structure_lock));
150 p_this = p_priv->next = p_priv->prev = p_new;
153 p_new->p_libvlc = p_this->p_libvlc;
155 vlc_spin_init( &p_priv->ref_spin );
156 p_priv->i_refcount = 1;
157 p_priv->pf_destructor = NULL;
158 p_priv->b_thread = false;
159 p_new->p_parent = NULL;
160 p_priv->pp_children = NULL;
161 p_priv->i_children = 0;
163 p_new->p_private = NULL;
165 /* Initialize mutexes and condvars */
166 vlc_mutex_init( &p_priv->var_lock );
167 vlc_cond_init( &p_priv->var_wait );
168 p_priv->pipes[0] = p_priv->pipes[1] = -1;
170 p_priv->next = p_this;
171 libvlc_lock (p_new->p_libvlc);
172 p_priv->prev = vlc_internals (p_this)->prev;
173 vlc_internals (p_this)->prev = p_new;
174 vlc_internals (p_priv->prev)->next = p_new;
175 libvlc_unlock (p_new->p_libvlc);
177 if (p_new == VLC_OBJECT(p_new->p_libvlc))
178 { /* TODO: should be in src/libvlc.c */
179 int canc = vlc_savecancel ();
180 var_Create( p_new, "list", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
181 var_AddCallback( p_new, "list", DumpCommand, NULL );
182 var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
183 var_AddCallback( p_new, "tree", DumpCommand, NULL );
184 var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
185 var_AddCallback( p_new, "vars", DumpCommand, NULL );
186 vlc_restorecancel (canc);
194 * Allocates and initializes a vlc object.
196 * @param i_type known object type (all of them are negative integer values),
197 * or object byte size (always positive).
199 * @return the new object, or NULL on error.
201 void * __vlc_object_create( vlc_object_t *p_this, int i_type )
203 const char * psz_type;
208 case VLC_OBJECT_INTF:
209 i_size = sizeof(intf_thread_t);
210 psz_type = "interface";
212 case VLC_OBJECT_DECODER:
213 i_size = sizeof(decoder_t);
214 psz_type = "decoder";
216 case VLC_OBJECT_PACKETIZER:
217 i_size = sizeof(decoder_t);
218 psz_type = "packetizer";
220 case VLC_OBJECT_AOUT:
221 i_size = sizeof(aout_instance_t);
222 psz_type = "audio output";
225 assert( i_type > 0 ); /* unknown type?! */
227 i_type = VLC_OBJECT_GENERIC;
228 psz_type = "generic";
232 return vlc_custom_create( p_this, i_size, i_type, psz_type );
237 ****************************************************************************
238 * Set the destructor of a vlc object
240 * This function sets the destructor of the vlc object. It will be called
241 * when the object is destroyed when the its refcount reaches 0.
242 * (It is called by the internal function vlc_object_destroy())
243 *****************************************************************************/
244 void __vlc_object_set_destructor( vlc_object_t *p_this,
245 vlc_destructor_t pf_destructor )
247 vlc_object_internals_t *p_priv = vlc_internals(p_this );
249 vlc_spin_lock( &p_priv->ref_spin );
250 p_priv->pf_destructor = pf_destructor;
251 vlc_spin_unlock( &p_priv->ref_spin );
255 ****************************************************************************
256 * Destroy a vlc object (Internal)
258 * This function destroys an object that has been previously allocated with
259 * vlc_object_create. The object's refcount must be zero and it must not be
260 * attached to other objects in any way.
262 * This function must be called with cancellation disabled (currently).
263 *****************************************************************************/
264 static void vlc_object_destroy( vlc_object_t *p_this )
266 vlc_object_internals_t *p_priv = vlc_internals( p_this );
268 /* Objects are always detached beforehand */
269 assert( !p_this->p_parent );
271 /* Send a kill to the object's thread if applicable */
272 vlc_object_kill( p_this );
274 /* Call the custom "subclass" destructor */
275 if( p_priv->pf_destructor )
276 p_priv->pf_destructor( p_this );
278 /* Any thread must have been cleaned up at this point. */
279 assert( !p_priv->b_thread );
281 /* Destroy the associated variables, starting from the end so that
282 * no memmove calls have to be done. */
283 while( p_priv->i_vars )
285 var_Destroy( p_this, p_priv->p_vars[p_priv->i_vars - 1].psz_name );
288 free( p_priv->p_vars );
289 vlc_cond_destroy( &p_priv->var_wait );
290 vlc_mutex_destroy( &p_priv->var_lock );
292 free( p_this->psz_header );
294 FREENULL( p_this->psz_object_name );
296 vlc_spin_destroy( &p_priv->ref_spin );
297 if( p_priv->pipes[1] != -1 && p_priv->pipes[1] != p_priv->pipes[0] )
298 close( p_priv->pipes[1] );
299 if( p_priv->pipes[0] != -1 )
300 close( p_priv->pipes[0] );
301 if( VLC_OBJECT(p_this->p_libvlc) == p_this )
302 vlc_mutex_destroy (&(libvlc_priv ((libvlc_int_t *)p_this)->structure_lock));
309 # include <winsock2.h>
310 # include <ws2tcpip.h>
313 * select()-able pipes emulated using Winsock
315 static int pipe (int fd[2])
318 int addrlen = sizeof (addr);
320 SOCKET l = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP), a,
321 c = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
322 if ((l == INVALID_SOCKET) || (c == INVALID_SOCKET))
325 memset (&addr, 0, sizeof (addr));
326 addr.sin_family = AF_INET;
327 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
328 if (bind (l, (PSOCKADDR)&addr, sizeof (addr))
329 || getsockname (l, (PSOCKADDR)&addr, &addrlen)
331 || connect (c, (PSOCKADDR)&addr, addrlen))
334 a = accept (l, NULL, NULL);
335 if (a == INVALID_SOCKET)
346 if (l != INVALID_SOCKET)
348 if (c != INVALID_SOCKET)
354 #define read( a, b, c ) recv (a, b, c, 0)
356 #define write( a, b, c ) send (a, b, c, 0)
358 #define close( a ) closesocket (a)
361 static vlc_mutex_t pipe_lock = VLC_STATIC_MUTEX;
364 * Returns the readable end of a pipe that becomes readable once termination
365 * of the object is requested (vlc_object_kill()).
366 * This can be used to wake-up out of a select() or poll() event loop, such
367 * typically when doing network I/O.
369 * Note that the pipe will remain the same for the lifetime of the object.
370 * DO NOT read the pipe nor close it yourself. Ever.
372 * @param obj object that would be "killed"
373 * @return a readable pipe descriptor, or -1 on error.
375 int vlc_object_waitpipe( vlc_object_t *obj )
377 vlc_object_internals_t *internals = vlc_internals( obj );
379 vlc_mutex_lock (&pipe_lock);
380 if (internals->pipes[0] == -1)
382 /* This can only ever happen if someone killed us without locking: */
383 assert (internals->pipes[1] == -1);
386 internals->pipes[0] = internals->pipes[1] = eventfd (0, 0);
387 if (internals->pipes[0] == -1)
390 if (pipe (internals->pipes))
391 internals->pipes[0] = internals->pipes[1] = -1;
394 if (internals->pipes[0] != -1 && obj->b_die)
395 { /* Race condition: vlc_object_kill() already invoked! */
396 msg_Dbg (obj, "waitpipe: object already dying");
397 write (internals->pipes[1], &(uint64_t){ 1 }, sizeof (uint64_t));
400 vlc_mutex_unlock (&pipe_lock);
401 return internals->pipes[0];
406 * Requests termination of an object, cancels the object thread, and make the
407 * object wait pipe (if it exists) readable. Not a cancellation point.
409 void __vlc_object_kill( vlc_object_t *p_this )
411 vlc_object_internals_t *priv = vlc_internals( p_this );
414 vlc_thread_cancel( p_this );
415 vlc_mutex_lock( &pipe_lock );
419 p_this->b_die = true;
422 /* This also serves as a memory barrier toward vlc_object_alive(): */
423 vlc_mutex_unlock( &pipe_lock );
427 int canc = vlc_savecancel ();
429 /* write _after_ setting b_die, so vlc_object_alive() returns false */
430 write (fd, &(uint64_t){ 1 }, sizeof (uint64_t));
431 msg_Dbg (p_this, "waitpipe: object killed");
432 vlc_restorecancel (canc);
437 /*****************************************************************************
438 * find a typed object and increment its refcount
439 *****************************************************************************
440 * This function recursively looks for a given object type. i_mode can be one
441 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
442 *****************************************************************************/
443 void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
445 vlc_object_t *p_found;
447 /* If we are of the requested type ourselves, don't look further */
448 if( !(i_mode & FIND_STRICT)
449 && vlc_internals (p_this)->i_object_type == i_type )
451 vlc_object_hold( p_this );
455 /* Otherwise, recursively look for the object */
456 if ((i_mode & 0x000f) == FIND_ANYWHERE)
457 return vlc_object_find (p_this->p_libvlc, i_type,
458 (i_mode & ~0x000f)|FIND_CHILD);
460 libvlc_lock (p_this->p_libvlc);
461 p_found = FindObject( p_this, i_type, i_mode );
462 libvlc_unlock (p_this->p_libvlc);
466 #undef vlc_object_find_name
468 * Finds a named object and increment its reference count.
469 * Beware that objects found in this manner can be "owned" by another thread,
470 * be of _any_ type, and be attached to any module (if any). With such an
471 * object reference, you can set or get object variables, emit log messages,
472 * and read write-once object parameters (psz_object_type, etc).
473 * You CANNOT cast the object to a more specific object type, and you
474 * definitely cannot invoke object type-specific callbacks with this.
476 * @param p_this object to search from
477 * @param psz_name name of the object to search for
478 * @param i_mode search direction: FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
480 * @return a matching object (must be released by the caller),
483 vlc_object_t *vlc_object_find_name( vlc_object_t *p_this,
484 const char *psz_name, int i_mode )
486 vlc_object_t *p_found;
488 /* If have the requested name ourselves, don't look further */
489 if( !(i_mode & FIND_STRICT)
490 && p_this->psz_object_name
491 && !strcmp( p_this->psz_object_name, psz_name ) )
493 vlc_object_hold( p_this );
497 libvlc_lock (p_this->p_libvlc);
499 /* Otherwise, recursively look for the object */
500 if( (i_mode & 0x000f) == FIND_ANYWHERE )
502 vlc_object_t *p_root = p_this;
505 while( p_root->p_parent != NULL &&
506 p_root != VLC_OBJECT( p_this->p_libvlc ) )
508 p_root = p_root->p_parent;
511 p_found = FindObjectName( p_root, psz_name,
512 (i_mode & ~0x000f)|FIND_CHILD );
513 if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
515 p_found = FindObjectName( VLC_OBJECT( p_this->p_libvlc ),
516 psz_name, (i_mode & ~0x000f)|FIND_CHILD );
521 p_found = FindObjectName( p_this, psz_name, i_mode );
524 libvlc_unlock (p_this->p_libvlc);
529 * Increment an object reference counter.
531 void * __vlc_object_hold( vlc_object_t *p_this )
533 vlc_object_internals_t *internals = vlc_internals( p_this );
535 vlc_spin_lock( &internals->ref_spin );
536 /* Avoid obvious freed object uses */
537 assert( internals->i_refcount > 0 );
538 /* Increment the counter */
539 internals->i_refcount++;
540 vlc_spin_unlock( &internals->ref_spin );
544 /*****************************************************************************
545 * Decrement an object refcount
546 * And destroy the object if its refcount reach zero.
547 *****************************************************************************/
548 void __vlc_object_release( vlc_object_t *p_this )
550 vlc_object_internals_t *internals = vlc_internals( p_this );
551 vlc_object_t *parent = NULL;
552 bool b_should_destroy;
554 vlc_spin_lock( &internals->ref_spin );
555 assert( internals->i_refcount > 0 );
557 if( internals->i_refcount > 1 )
560 /* There are still other references to the object */
561 internals->i_refcount--;
562 vlc_spin_unlock( &internals->ref_spin );
565 vlc_spin_unlock( &internals->ref_spin );
568 /* Remember that we cannot hold the spin while waiting on the mutex */
569 libvlc_lock (p_this->p_libvlc);
570 /* Take the spin again. Note that another thread may have held the
571 * object in the (very short) mean time. */
572 vlc_spin_lock( &internals->ref_spin );
573 b_should_destroy = --internals->i_refcount == 0;
574 vlc_spin_unlock( &internals->ref_spin );
576 if( b_should_destroy )
578 parent = p_this->p_parent;
581 if( VLC_OBJECT(p_this->p_libvlc) == p_this )
584 vlc_object_t *leaked = internals->next;
585 while( leaked != p_this )
587 /* We are leaking this object */
589 "ERROR: leaking object (%p, type:%s, name:%s)\n",
590 leaked, leaked->psz_object_type,
591 leaked->psz_object_name );
592 /* Dump object to ease debugging */
593 vlc_object_dump( leaked );
595 leaked = vlc_internals (leaked)->next;
598 if( internals->next != p_this )
599 /* Dump libvlc object to ease debugging */
600 vlc_object_dump( p_this );
603 /* Remove the object from object list
604 * so that it cannot be encountered by vlc_object_get() */
605 vlc_internals (internals->next)->prev = internals->prev;
606 vlc_internals (internals->prev)->next = internals->next;
609 /* Detach from parent to protect against FIND_CHILDREN */
610 vlc_object_detach_unlocked (p_this);
612 /* We have no children */
613 assert (internals->i_children == 0);
615 libvlc_unlock (p_this->p_libvlc);
617 if( b_should_destroy )
621 canc = vlc_savecancel ();
622 vlc_object_destroy( p_this );
623 vlc_restorecancel (canc);
625 vlc_object_release (parent);
630 ****************************************************************************
631 * attach object to a parent object
632 *****************************************************************************
633 * This function sets p_this as a child of p_parent, and p_parent as a parent
634 * of p_this. This link can be undone using vlc_object_detach.
635 *****************************************************************************/
636 void __vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
638 if( !p_this ) return;
640 vlc_object_hold (p_parent);
641 libvlc_lock (p_this->p_libvlc);
643 /* Attach the parent to its child */
644 assert (!p_this->p_parent);
645 p_this->p_parent = p_parent;
647 /* Attach the child to its parent */
648 vlc_object_internals_t *priv = vlc_internals( p_parent );
649 INSERT_ELEM( priv->pp_children, priv->i_children, priv->i_children,
651 libvlc_unlock (p_this->p_libvlc);
655 static void vlc_object_detach_unlocked (vlc_object_t *p_this)
657 if (p_this->p_parent == NULL)
660 vlc_object_internals_t *priv = vlc_internals( p_this->p_parent );
664 /* Remove p_this's parent */
665 p_this->p_parent = NULL;
667 /* Remove all of p_parent's children which are p_this */
668 for( i_index = priv->i_children ; i_index-- ; )
670 if( priv->pp_children[i_index] == p_this )
673 for( i = i_index ; i < priv->i_children ; i++ )
674 priv->pp_children[i] = priv->pp_children[i+1];
678 if( priv->i_children )
680 vlc_object_t **pp_children = (vlc_object_t **)
681 realloc( priv->pp_children,
682 priv->i_children * sizeof(vlc_object_t *) );
684 priv->pp_children = pp_children;
688 /* Special case - don't realloc() to zero to avoid leaking */
689 free( priv->pp_children );
690 priv->pp_children = NULL;
696 ****************************************************************************
697 * detach object from its parent
698 *****************************************************************************
699 * This function removes all links between an object and its parent.
700 *****************************************************************************/
701 void __vlc_object_detach( vlc_object_t *p_this )
703 vlc_object_t *p_parent;
704 if( !p_this ) return;
706 libvlc_lock (p_this->p_libvlc);
707 p_parent = p_this->p_parent;
709 vlc_object_detach_unlocked( p_this );
710 libvlc_unlock (p_this->p_libvlc);
713 vlc_object_release (p_parent);
718 ****************************************************************************
719 * find a list typed objects and increment their refcount
720 *****************************************************************************
721 * This function recursively looks for a given object type. i_mode can be one
722 * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
723 *****************************************************************************/
724 vlc_list_t * vlc_list_find( vlc_object_t *p_this, int i_type, int i_mode )
729 /* Look for the objects */
730 switch( i_mode & 0x000f )
733 return vlc_list_find (VLC_OBJECT(p_this->p_libvlc), i_type, FIND_CHILD);
736 libvlc_lock (p_this->p_libvlc);
737 i_count = CountChildren( p_this, i_type );
738 p_list = NewList( i_count );
740 /* Check allocation was successful */
741 if( p_list->i_count != i_count )
743 libvlc_unlock (p_this->p_libvlc);
749 ListChildren( p_list, p_this, i_type );
750 libvlc_unlock (p_this->p_libvlc);
754 msg_Err( p_this, "unimplemented!" );
755 p_list = NewList( 0 );
763 * Gets the list of children of an objects, and increment their reference
765 * @return a list (possibly empty) or NULL in case of error.
767 vlc_list_t *__vlc_list_children( vlc_object_t *obj )
770 vlc_object_internals_t *priv = vlc_internals( obj );
772 libvlc_lock (obj->p_libvlc);
773 l = NewList( priv->i_children );
774 for (int i = 0; i < l->i_count; i++)
776 vlc_object_hold( priv->pp_children[i] );
777 l->p_values[i].p_object = priv->pp_children[i];
779 libvlc_unlock (obj->p_libvlc);
783 /*****************************************************************************
784 * DumpCommand: print the current vlc structure
785 *****************************************************************************
786 * This function prints either an ASCII tree showing the connections between
787 * vlc objects, and additional information such as their refcount, thread ID,
788 * etc. (command "tree"), or the same data as a simple list (command "list").
789 *****************************************************************************/
790 static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
791 vlc_value_t oldval, vlc_value_t newval, void *p_data )
793 libvlc_int_t *p_libvlc = p_this->p_libvlc;
795 (void)oldval; (void)p_data;
796 if( *psz_cmd == 'l' )
798 vlc_object_t *cur = VLC_OBJECT (p_libvlc);
800 libvlc_lock (p_this->p_libvlc);
803 PrintObject (cur, "");
804 cur = vlc_internals (cur)->next;
806 while (cur != VLC_OBJECT(p_libvlc));
807 libvlc_unlock (p_this->p_libvlc);
811 vlc_object_t *p_object = NULL;
813 if( *newval.psz_string )
815 /* try using the object's name to find it */
816 p_object = vlc_object_find_name( p_this, newval.psz_string,
824 libvlc_lock (p_this->p_libvlc);
825 if( *psz_cmd == 't' )
827 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
830 p_object = VLC_OBJECT(p_this->p_libvlc);
833 DumpStructure( p_object, 0, psz_foo );
835 else if( *psz_cmd == 'v' )
840 p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
842 PrintObject( p_object, "" );
844 if( !vlc_internals( p_object )->i_vars )
845 printf( " `-o No variables\n" );
846 for( i = 0; i < vlc_internals( p_object )->i_vars; i++ )
848 variable_t *p_var = vlc_internals( p_object )->p_vars + i;
850 const char *psz_type = "unknown";
851 switch( p_var->i_type & VLC_VAR_TYPE )
853 #define MYCASE( type, nice ) \
854 case VLC_VAR_ ## type: \
857 MYCASE( VOID, "void" );
858 MYCASE( BOOL, "bool" );
859 MYCASE( INTEGER, "integer" );
860 MYCASE( HOTKEY, "hotkey" );
861 MYCASE( STRING, "string" );
862 MYCASE( MODULE, "module" );
863 MYCASE( FILE, "file" );
864 MYCASE( DIRECTORY, "directory" );
865 MYCASE( VARIABLE, "variable" );
866 MYCASE( FLOAT, "float" );
867 MYCASE( TIME, "time" );
868 MYCASE( ADDRESS, "address" );
869 MYCASE( MUTEX, "mutex" );
870 MYCASE( LIST, "list" );
873 printf( " %c-o \"%s\" (%s",
874 i + 1 == vlc_internals( p_object )->i_vars ? '`' : '|',
875 p_var->psz_name, psz_type );
876 if( p_var->psz_text )
877 printf( ", %s", p_var->psz_text );
879 if( p_var->i_type & VLC_VAR_HASCHOICE )
880 printf( ", has choices" );
881 if( p_var->i_type & VLC_VAR_ISCOMMAND )
882 printf( ", command" );
883 if( p_var->i_entries )
884 printf( ", %d callbacks", p_var->i_entries );
885 switch( p_var->i_type & VLC_VAR_CLASS )
891 printf( ": %s", p_var->val.b_bool ? "true" : "false" );
893 case VLC_VAR_INTEGER:
894 printf( ": %d", p_var->val.i_int );
897 printf( ": \"%s\"", p_var->val.psz_string );
900 printf( ": %f", p_var->val.f_float );
903 printf( ": %"PRIi64, (int64_t)p_var->val.i_time );
905 case VLC_VAR_ADDRESS:
906 printf( ": %p", p_var->val.p_address );
915 libvlc_unlock (p_this->p_libvlc);
917 if( *newval.psz_string )
919 vlc_object_release( p_object );
926 /*****************************************************************************
927 * vlc_list_release: free a list previously allocated by vlc_list_find
928 *****************************************************************************
929 * This function decreases the refcount of all objects in the list and
931 *****************************************************************************/
932 void vlc_list_release( vlc_list_t *p_list )
936 for( i_index = 0; i_index < p_list->i_count; i_index++ )
938 vlc_object_release( p_list->p_values[i_index].p_object );
941 free( p_list->p_values );
945 /*****************************************************************************
946 * dump an object. (Debug function)
947 *****************************************************************************/
949 static void vlc_object_dump( vlc_object_t *p_this )
951 char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
954 DumpStructure( p_this, 0, psz_foo );
958 /* Following functions are local */
960 static vlc_object_t * FindObject( vlc_object_t *p_this, int i_type, int i_mode )
965 switch( i_mode & 0x000f )
968 p_tmp = p_this->p_parent;
971 if( vlc_internals( p_tmp )->i_object_type == i_type )
973 vlc_object_hold( p_tmp );
978 return FindObject( p_tmp, i_type, i_mode );
984 for( i = vlc_internals( p_this )->i_children; i--; )
986 p_tmp = vlc_internals( p_this )->pp_children[i];
987 if( vlc_internals( p_tmp )->i_object_type == i_type )
989 vlc_object_hold( p_tmp );
992 else if( vlc_internals( p_tmp )->i_children )
994 p_tmp = FindObject( p_tmp, i_type, i_mode );
1004 /* Handled in vlc_object_find */
1011 static vlc_object_t * FindObjectName( vlc_object_t *p_this,
1012 const char *psz_name,
1016 vlc_object_t *p_tmp;
1018 switch( i_mode & 0x000f )
1021 p_tmp = p_this->p_parent;
1024 if( p_tmp->psz_object_name
1025 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1027 vlc_object_hold( p_tmp );
1032 return FindObjectName( p_tmp, psz_name, i_mode );
1038 for( i = vlc_internals( p_this )->i_children; i--; )
1040 p_tmp = vlc_internals( p_this )->pp_children[i];
1041 if( p_tmp->psz_object_name
1042 && !strcmp( p_tmp->psz_object_name, psz_name ) )
1044 vlc_object_hold( p_tmp );
1047 else if( vlc_internals( p_tmp )->i_children )
1049 p_tmp = FindObjectName( p_tmp, psz_name, i_mode );
1059 /* Handled in vlc_object_find */
1067 static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
1069 char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
1072 int canc = vlc_savecancel ();
1073 memset( &psz_name, 0, sizeof(psz_name) );
1074 if( p_this->psz_object_name )
1076 snprintf( psz_name, 49, " \"%s\"", p_this->psz_object_name );
1078 psz_name[48] = '\"';
1081 psz_children[0] = '\0';
1082 switch( vlc_internals( p_this )->i_children )
1087 strcpy( psz_children, ", 1 child" );
1090 snprintf( psz_children, 19, ", %i children",
1091 vlc_internals( p_this )->i_children );
1095 psz_refcount[0] = '\0';
1096 if( vlc_internals( p_this )->i_refcount > 0 )
1097 snprintf( psz_refcount, 19, ", refcount %u",
1098 vlc_internals( p_this )->i_refcount );
1100 psz_thread[0] = '\0';
1101 if( vlc_internals( p_this )->b_thread )
1102 snprintf( psz_thread, 29, " (thread %lu)",
1103 (unsigned long)vlc_internals( p_this )->thread_id );
1105 psz_parent[0] = '\0';
1106 if( p_this->p_parent )
1107 snprintf( psz_parent, 19, ", parent %p", p_this->p_parent );
1109 printf( " %so %p %s%s%s%s%s%s\n", psz_prefix,
1110 p_this, p_this->psz_object_type,
1111 psz_name, psz_thread, psz_refcount, psz_children,
1113 vlc_restorecancel (canc);
1116 static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
1119 char i_back = psz_foo[i_level];
1120 psz_foo[i_level] = '\0';
1122 PrintObject( p_this, psz_foo );
1124 psz_foo[i_level] = i_back;
1126 if( i_level / 2 >= MAX_DUMPSTRUCTURE_DEPTH )
1128 msg_Warn( p_this, "structure tree is too deep" );
1132 for( i = 0 ; i < vlc_internals( p_this )->i_children ; i++ )
1136 psz_foo[i_level-1] = ' ';
1138 if( psz_foo[i_level-2] == '`' )
1140 psz_foo[i_level-2] = ' ';
1144 if( i == vlc_internals( p_this )->i_children - 1 )
1146 psz_foo[i_level] = '`';
1150 psz_foo[i_level] = '|';
1153 psz_foo[i_level+1] = '-';
1154 psz_foo[i_level+2] = '\0';
1156 DumpStructure( vlc_internals( p_this )->pp_children[i], i_level + 2,
1161 static vlc_list_t * NewList( int i_count )
1163 vlc_list_t * p_list = (vlc_list_t *)malloc( sizeof( vlc_list_t ) );
1164 if( p_list == NULL )
1169 p_list->i_count = i_count;
1173 p_list->p_values = NULL;
1177 p_list->p_values = malloc( i_count * sizeof( vlc_value_t ) );
1178 if( p_list->p_values == NULL )
1180 p_list->i_count = 0;
1187 static void ListReplace( vlc_list_t *p_list, vlc_object_t *p_object,
1190 if( p_list == NULL || i_index >= p_list->i_count )
1195 vlc_object_hold( p_object );
1197 p_list->p_values[i_index].p_object = p_object;
1202 /*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
1204 if( p_list == NULL )
1209 p_list->p_values = realloc( p_list->p_values, (p_list->i_count + 1)
1210 * sizeof( vlc_value_t ) );
1211 if( p_list->p_values == NULL )
1213 p_list->i_count = 0;
1217 vlc_object_hold( p_object );
1219 p_list->p_values[p_list->i_count].p_object = p_object;
1225 static int CountChildren( vlc_object_t *p_this, int i_type )
1227 vlc_object_t *p_tmp;
1230 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1232 p_tmp = vlc_internals( p_this )->pp_children[i];
1234 if( vlc_internals( p_tmp )->i_object_type == i_type )
1238 i_count += CountChildren( p_tmp, i_type );
1244 static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
1246 vlc_object_t *p_tmp;
1249 for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
1251 p_tmp = vlc_internals( p_this )->pp_children[i];
1253 if( vlc_internals( p_tmp )->i_object_type == i_type )
1254 ListReplace( p_list, p_tmp, p_list->i_count++ );
1256 ListChildren( p_list, p_tmp, i_type );