* objects.c: vlc_object_t handling
*****************************************************************************
* Copyright (C) 2004-2008 the VideoLAN team
- * $Id$
*
* Authors: Samuel Hocevar <sam@zoy.org>
*
/**
* \file
* This file contains the functions to handle the vlc_object_t type
+ *
+ * Unless otherwise stated, functions in this file are not cancellation point.
+ * All functions in this file are safe w.r.t. deferred cancellation.
*/
# include "config.h"
#endif
-#include <vlc/vlc.h>
+#include <vlc_common.h>
#include "../libvlc.h"
#include <vlc_vout.h>
static vlc_object_t * FindObject ( vlc_object_t *, int, int );
static vlc_object_t * FindObjectName( vlc_object_t *, const char *, int );
-static void DetachObject ( vlc_object_t * );
static void PrintObject ( vlc_object_t *, const char * );
static void DumpStructure ( vlc_object_t *, int, char * );
-static int FindIndex ( vlc_object_t *, vlc_object_t **, int );
-static void SetAttachment ( vlc_object_t *, bool );
static vlc_list_t * NewList ( int );
static void ListReplace ( vlc_list_t *, vlc_object_t *, int );
-static void ListAppend ( vlc_list_t *, vlc_object_t * );
+/*static void ListAppend ( vlc_list_t *, vlc_object_t * );*/
static int CountChildren ( vlc_object_t *, int );
static void ListChildren ( vlc_list_t *, vlc_object_t *, int );
static void vlc_object_destroy( vlc_object_t *p_this );
static void vlc_object_detach_unlocked (vlc_object_t *p_this);
+static void vlc_object_dump( vlc_object_t *p_this );
/*****************************************************************************
* Local structure lock
*****************************************************************************/
-static vlc_mutex_t structure_lock;
+static void close_nocancel (int fd)
+{
+ int canc = vlc_savecancel ();
+ close (fd);
+ vlc_restorecancel (canc);
+}
+
+static void libvlc_lock (libvlc_int_t *p_libvlc)
+{
+ vlc_mutex_lock (&(libvlc_priv (p_libvlc)->structure_lock));
+}
+
+static void libvlc_unlock (libvlc_int_t *p_libvlc)
+{
+ vlc_mutex_unlock (&(libvlc_priv (p_libvlc)->structure_lock));
+}
-void *vlc_custom_create( vlc_object_t *p_this, size_t i_size,
- int i_type, const char *psz_type )
+void *__vlc_custom_create( vlc_object_t *p_this, size_t i_size,
+ int i_type, const char *psz_type )
{
vlc_object_t *p_new;
vlc_object_internals_t *p_priv;
p_new->b_die = false;
p_new->b_error = false;
- p_new->b_dead = false;
p_new->b_force = false;
p_new->psz_header = NULL;
return NULL;
}
- libvlc_global_data_t *p_libvlc_global;
if( p_this == NULL )
{
- /* Only the global root object is created out of the blue */
- p_libvlc_global = (libvlc_global_data_t *)p_new;
- p_new->p_libvlc = NULL;
-
- p_libvlc_global->i_counter = 0;
- p_libvlc_global->i_objects = 0;
- p_libvlc_global->pp_objects = NULL;
- vlc_mutex_init( &structure_lock );
+ libvlc_int_t *self = (libvlc_int_t*)p_new;
+ p_new->p_libvlc = self;
+ vlc_mutex_init (&(libvlc_priv (self)->structure_lock));
+ p_this = p_priv->next = p_priv->prev = p_new;
}
else
- {
- p_libvlc_global = vlc_global();
- if( i_type == VLC_OBJECT_LIBVLC )
- p_new->p_libvlc = (libvlc_int_t*)p_new;
- else
- p_new->p_libvlc = p_this->p_libvlc;
- }
+ p_new->p_libvlc = p_this->p_libvlc;
vlc_spin_init( &p_priv->ref_spin );
p_priv->i_refcount = 1;
p_priv->pf_destructor = NULL;
p_priv->b_thread = false;
p_new->p_parent = NULL;
- p_new->pp_children = NULL;
- p_new->i_children = 0;
+ p_priv->pp_children = NULL;
+ p_priv->i_children = 0;
p_new->p_private = NULL;
/* Initialize mutexes and condvars */
- vlc_mutex_init( &p_new->object_lock );
- vlc_cond_init( p_new, &p_new->object_wait );
+ vlc_mutex_init( &p_priv->lock );
+ vlc_cond_init( &p_priv->wait );
vlc_mutex_init( &p_priv->var_lock );
+ vlc_cond_init( &p_priv->var_wait );
vlc_spin_init( &p_priv->spin );
p_priv->pipes[0] = p_priv->pipes[1] = -1;
- vlc_mutex_lock( &structure_lock );
- p_new->i_object_id = p_libvlc_global->i_counter++;
- /* Wooohaa! If *this* fails, we're in serious trouble! Anyway it's
- * useless to try and recover anything if pp_objects gets smashed. */
- TAB_APPEND( p_libvlc_global->i_objects, p_libvlc_global->pp_objects,
- p_new );
- vlc_mutex_unlock( &structure_lock );
+ p_priv->next = p_this;
+ libvlc_lock (p_new->p_libvlc);
+ p_priv->prev = vlc_internals (p_this)->prev;
+ vlc_internals (p_this)->prev = p_new;
+ vlc_internals (p_priv->prev)->next = p_new;
+ libvlc_unlock (p_new->p_libvlc);
- if( i_type == VLC_OBJECT_LIBVLC )
- {
+ if (p_new == VLC_OBJECT(p_new->p_libvlc))
+ { /* TODO: should be in src/libvlc.c */
+ int canc = vlc_savecancel ();
var_Create( p_new, "list", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
var_AddCallback( p_new, "list", DumpCommand, NULL );
var_Create( p_new, "tree", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
var_AddCallback( p_new, "tree", DumpCommand, NULL );
var_Create( p_new, "vars", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
var_AddCallback( p_new, "vars", DumpCommand, NULL );
+ vlc_restorecancel (canc);
}
return p_new;
switch( i_type )
{
- case VLC_OBJECT_LIBVLC:
- i_size = sizeof(libvlc_int_t);
- psz_type = "libvlc";
- break;
case VLC_OBJECT_INTF:
i_size = sizeof(intf_thread_t);
psz_type = "interface";
break;
- case VLC_OBJECT_DIALOGS:
- i_size = sizeof(intf_thread_t);
- psz_type = "dialogs";
- break;
- case VLC_OBJECT_DEMUX:
- i_size = sizeof(demux_t);
- psz_type = "demux";
- break;
- case VLC_OBJECT_ACCESS:
- i_size = sizeof(access_t);
- psz_type = "access";
- break;
case VLC_OBJECT_DECODER:
i_size = sizeof(decoder_t);
psz_type = "decoder";
i_size = sizeof(encoder_t);
psz_type = "encoder";
break;
- case VLC_OBJECT_FILTER:
- i_size = sizeof(filter_t);
- psz_type = "filter";
- break;
- case VLC_OBJECT_VOUT:
- i_size = sizeof(vout_thread_t);
- psz_type = "video output";
- break;
case VLC_OBJECT_AOUT:
i_size = sizeof(aout_instance_t);
psz_type = "audio output";
break;
- case VLC_OBJECT_SOUT:
- i_size = sizeof(sout_instance_t);
- psz_type = "stream output";
- break;
- case VLC_OBJECT_OPENGL:
- i_size = sizeof( vout_thread_t );
- psz_type = "opengl";
- break;
- case VLC_OBJECT_ANNOUNCE:
- i_size = sizeof( announce_handler_t );
- psz_type = "announce";
- break;
- case VLC_OBJECT_INTERACTION:
- i_size = sizeof( interaction_t );
- psz_type = "interaction";
- break;
default:
- i_size = i_type > (int)sizeof(vlc_object_t)
- ? i_type : (int)sizeof(vlc_object_t);
+ assert( i_type > 0 ); /* unknown type?! */
+ i_size = i_type;
i_type = VLC_OBJECT_GENERIC;
psz_type = "generic";
break;
* This function destroys an object that has been previously allocated with
* vlc_object_create. The object's refcount must be zero and it must not be
* attached to other objects in any way.
+ *
+ * This function must be called with cancellation disabled (currently).
*****************************************************************************/
static void vlc_object_destroy( vlc_object_t *p_this )
{
/* Send a kill to the object's thread if applicable */
vlc_object_kill( p_this );
- /* If we are running on a thread, wait until it ends */
- if( p_priv->b_thread )
- vlc_thread_join( p_this );
-
/* Call the custom "subclass" destructor */
if( p_priv->pf_destructor )
p_priv->pf_destructor( p_this );
- /* Sanity checks */
- if( p_this->i_children )
- {
- int i;
-
- fprintf( stderr,
- "ERROR: cannot delete object (%i, %s) with %d children\n",
- p_this->i_object_id, p_this->psz_object_name,
- p_this->i_children );
-
- for( i = 0; i < p_this->i_children; i++ )
- {
- fprintf( stderr,
- "ERROR: Remaining children object "
- "(id:%i, type:%s, name:%s)\n",
- p_this->pp_children[i]->i_object_id,
- p_this->pp_children[i]->psz_object_type,
- p_this->pp_children[i]->psz_object_name );
- }
- fflush(stderr);
-
- /* Dump libvlc object to ease debugging */
- vlc_object_dump( p_this->p_libvlc );
-
- abort();
- }
+ /* Any thread must have been cleaned up at this point. */
+ assert( !p_priv->b_thread );
/* Destroy the associated variables, starting from the end so that
* no memmove calls have to be done. */
}
free( p_priv->p_vars );
+ vlc_cond_destroy( &p_priv->var_wait );
vlc_mutex_destroy( &p_priv->var_lock );
free( p_this->psz_header );
- if( p_this->p_libvlc == NULL )
- {
- libvlc_global_data_t *p_global = (libvlc_global_data_t *)p_this;
-
-#ifndef NDEBUG
- assert( p_global == vlc_global() );
- /* Test for leaks */
- if( p_global->i_objects > 0 )
- {
- int i;
- for( i = 0; i < p_global->i_objects; i++ )
- {
- /* We are leaking this object */
- fprintf( stderr,
- "ERROR: leaking object (id:%i, type:%s, name:%s)\n",
- p_global->pp_objects[i]->i_object_id,
- p_global->pp_objects[i]->psz_object_type,
- p_global->pp_objects[i]->psz_object_name );
-
- /* Dump libvlc object to ease debugging */
- vlc_object_dump( p_global->pp_objects[i] );
-
- fflush(stderr);
- }
-
- /* Dump libvlc object to ease debugging */
- vlc_object_dump( p_this );
-
- /* Strongly abort, cause we want these to be fixed */
- abort();
- }
-#endif
-
- /* We are the global object ... no need to lock. */
- free( p_global->pp_objects );
- p_global->pp_objects = NULL;
-
- vlc_mutex_destroy( &structure_lock );
- }
-
FREENULL( p_this->psz_object_name );
-#if defined(WIN32) || defined(UNDER_CE)
- /* if object has an associated thread, close it now */
- if( p_priv->thread_id )
- CloseHandle(p_priv->thread_id);
-#endif
-
vlc_spin_destroy( &p_priv->ref_spin );
- vlc_mutex_destroy( &p_this->object_lock );
- vlc_cond_destroy( &p_this->object_wait );
+ vlc_mutex_destroy( &p_priv->lock );
+ vlc_cond_destroy( &p_priv->wait );
vlc_spin_destroy( &p_priv->spin );
if( p_priv->pipes[1] != -1 )
close( p_priv->pipes[1] );
if( p_priv->pipes[0] != -1 )
close( p_priv->pipes[0] );
+ if( VLC_OBJECT(p_this->p_libvlc) == p_this )
+ vlc_mutex_destroy (&(libvlc_priv ((libvlc_int_t *)p_this)->structure_lock));
free( p_priv );
}
void __vlc_object_lock( vlc_object_t *obj )
{
- vlc_mutex_lock( &obj->object_lock );
+ vlc_mutex_lock( &(vlc_internals(obj)->lock) );
}
void __vlc_object_unlock( vlc_object_t *obj )
{
- vlc_assert_locked( &obj->object_lock );
- vlc_mutex_unlock( &obj->object_lock );
+ vlc_assert_locked( &(vlc_internals(obj)->lock) );
+ vlc_mutex_unlock( &(vlc_internals(obj)->lock) );
}
#ifdef WIN32
* @param obj object that would be "killed"
* @return a readable pipe descriptor, or -1 on error.
*/
-int __vlc_object_waitpipe( vlc_object_t *obj )
+int vlc_object_waitpipe( vlc_object_t *obj )
{
int pfd[2] = { -1, -1 };
vlc_object_internals_t *internals = vlc_internals( obj );
/**
- * Waits for the object to be signaled (using vlc_object_signal()).
- * If the object already has a signal pending, this function will return
- * immediately. It is asserted that the caller holds the object lock.
+ * Suspends until another thread calls vlc_object_signal_unlocked().
+ * The thread may be woken up earlier due to limitations of the underlying
+ * implementation.
*
- * @return true if the object is dying and should terminate.
- */
-bool __vlc_object_wait( vlc_object_t *obj )
-{
- vlc_assert_locked( &obj->object_lock );
- vlc_cond_wait( &obj->object_wait, &obj->object_lock );
- return obj->b_die;
-}
-
-
-/**
- * Waits for the object to be signaled (using vlc_object_signal()), or for
- * a timer to expire.
- * If the object already has a signal pending, this function will return
- * immediately. It is asserted that the caller holds the object lock.
+ * In new code, please use vlc_cond_wait() instead.
*
- * @return negative if the object is dying and should terminate,
- * positive if the the object has been signaled but is not dying,
- * 0 if timeout has been reached.
+ * This function is a cancellation point. In case of cancellation, the object
+ * will be in locked state.
*/
-int __vlc_object_timedwait( vlc_object_t *obj, mtime_t deadline )
+void __vlc_object_wait( vlc_object_t *obj )
{
- int v;
-
- vlc_assert_locked( &obj->object_lock );
- v = vlc_cond_timedwait( &obj->object_wait, &obj->object_lock, deadline );
- if( v == 0 ) /* signaled */
- return obj->b_die ? -1 : 1;
- return 0;
+ vlc_object_internals_t *priv = vlc_internals( obj );
+ vlc_assert_locked( &priv->lock);
+ vlc_cond_wait( &priv->wait, &priv->lock );
}
/**
- * Checks whether an object has been "killed".
- * The object lock must be held.
- *
- * Typical code for an object thread could be:
+ * Wakes up one thread waiting on the object. If no thread are (yet) waiting,
+ * nothing happens.
*
- vlc_object_lock (self);
- ...initialization...
- while (vlc_object_alive (self))
- {
- ...preprocessing...
-
- if (vlc_object_wait (self))
- continue;
-
- ...postprocessing...
- }
- ...deinitialization...
- vlc_object_unlock (self);
- *
- *
- * @return true iff the object has not been killed yet
- */
-bool __vlc_object_alive( vlc_object_t *obj )
-{
- vlc_assert_locked( &obj->object_lock );
- return !obj->b_die;
-}
-
-
-/**
- * Signals an object for which the lock is held.
+ * Please do not use this function in new code as we are trying to untangle
+ * objects and threads. Use vlc_cond_wait() instead.
*/
void __vlc_object_signal_unlocked( vlc_object_t *obj )
{
- vlc_assert_locked (&obj->object_lock);
- vlc_cond_signal( &obj->object_wait );
+ vlc_assert_locked (&(vlc_internals(obj)->lock));
+ vlc_cond_signal( &(vlc_internals(obj)->wait) );
}
*/
void __vlc_object_kill( vlc_object_t *p_this )
{
- vlc_object_internals_t *internals = vlc_internals( p_this );
+ vlc_object_internals_t *priv = vlc_internals( p_this );
int fd;
- vlc_mutex_lock( &p_this->object_lock );
+ vlc_thread_cancel( p_this );
+ vlc_object_lock( p_this );
p_this->b_die = true;
- vlc_spin_lock (&internals->spin);
- fd = internals->pipes[1];
- internals->pipes[1] = -1;
- vlc_spin_unlock (&internals->spin);
+ vlc_spin_lock (&priv->spin);
+ fd = priv->pipes[1];
+ priv->pipes[1] = -1;
+ vlc_spin_unlock (&priv->spin);
if( fd != -1 )
{
msg_Dbg (p_this, "waitpipe: object killed");
- close (fd);
+ close_nocancel (fd);
}
- if( p_this->i_object_type == VLC_OBJECT_LIBVLC )
- for( int i = 0; i < p_this->i_children ; i++ )
- vlc_object_kill( p_this->pp_children[i] );
-
- vlc_object_signal_unlocked( p_this );
- vlc_mutex_unlock( &p_this->object_lock );
+ vlc_cond_broadcast (&priv->wait);
+ /* This also serves as a memory barrier toward vlc_object_alive(): */
+ vlc_object_unlock( p_this );
}
-/**
- * find an object given its ID
- *
- * This function looks for the object whose i_object_id field is i_id. We
- * use a dichotomy so that lookups are in log2(n).
- *****************************************************************************/
-void * vlc_object_get( int i_id )
-{
- int i_max, i_middle;
- vlc_object_t **pp_objects;
- libvlc_global_data_t *p_libvlc_global = vlc_global();
- vlc_object_t *obj = NULL;
-
- vlc_mutex_lock( &structure_lock );
-
- pp_objects = p_libvlc_global->pp_objects;
-
- /* Perform our dichotomy */
- for( i_max = p_libvlc_global->i_objects - 1 ; ; )
- {
- i_middle = i_max / 2;
-
- if( pp_objects[i_middle]->i_object_id > i_id )
- {
- i_max = i_middle;
- }
- else if( pp_objects[i_middle]->i_object_id < i_id )
- {
- if( i_middle )
- {
- pp_objects += i_middle;
- i_max -= i_middle;
- }
- else
- {
- /* This happens when there are only two remaining objects */
- if( pp_objects[i_middle+1]->i_object_id == i_id )
- {
- vlc_object_yield( pp_objects[i_middle+1] );
- obj = pp_objects[i_middle+1];
- }
- break;
- }
- }
- else
- {
- vlc_object_yield( pp_objects[i_middle] );
- obj = pp_objects[i_middle];
- break;
- }
- }
-
- vlc_mutex_unlock( &structure_lock );
- return obj;
-}
-
-/**
- ****************************************************************************
+/*****************************************************************************
* find a typed object and increment its refcount
*****************************************************************************
* This function recursively looks for a given object type. i_mode can be one
/* If we are of the requested type ourselves, don't look further */
if( !(i_mode & FIND_STRICT) && p_this->i_object_type == i_type )
{
- vlc_object_yield( p_this );
+ vlc_object_hold( p_this );
return p_this;
}
- vlc_mutex_lock( &structure_lock );
-
/* Otherwise, recursively look for the object */
- if( (i_mode & 0x000f) == FIND_ANYWHERE )
- {
- vlc_object_t *p_root = p_this;
-
- /* Find the root */
- while( p_root->p_parent != NULL &&
- p_root != VLC_OBJECT( p_this->p_libvlc ) )
- {
- p_root = p_root->p_parent;
- }
-
- p_found = FindObject( p_root, i_type, (i_mode & ~0x000f)|FIND_CHILD );
- if( p_found == NULL && p_root != VLC_OBJECT( p_this->p_libvlc ) )
- {
- p_found = FindObject( VLC_OBJECT( p_this->p_libvlc ),
- i_type, (i_mode & ~0x000f)|FIND_CHILD );
- }
- }
- else
- {
- p_found = FindObject( p_this, i_type, i_mode );
- }
-
- vlc_mutex_unlock( &structure_lock );
+ if ((i_mode & 0x000f) == FIND_ANYWHERE)
+ return vlc_object_find (p_this->p_libvlc, i_type,
+ (i_mode & ~0x000f)|FIND_CHILD);
+ libvlc_lock (p_this->p_libvlc);
+ p_found = FindObject( p_this, i_type, i_mode );
+ libvlc_unlock (p_this->p_libvlc);
return p_found;
}
+#undef vlc_object_find_name
/**
- ****************************************************************************
- * find a named object and increment its refcount
- *****************************************************************************
- * This function recursively looks for a given object name. i_mode can be one
- * of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
- *****************************************************************************/
-void * __vlc_object_find_name( vlc_object_t *p_this, const char *psz_name,
- int i_mode )
+ * Finds a named object and increment its reference count.
+ * Beware that objects found in this manner can be "owned" by another thread,
+ * be of _any_ type, and be attached to any module (if any). With such an
+ * object reference, you can set or get object variables, emit log messages,
+ * and read write-once object parameters (psz_object_type, etc).
+ * You CANNOT cast the object to a more specific object type, and you
+ * definitely cannot invoke object type-specific callbacks with this.
+ *
+ * @param p_this object to search from
+ * @param psz_name name of the object to search for
+ * @param i_mode search direction: FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
+ *
+ * @return a matching object (must be released by the caller),
+ * or NULL on error.
+ */
+vlc_object_t *vlc_object_find_name( vlc_object_t *p_this,
+ const char *psz_name, int i_mode )
{
vlc_object_t *p_found;
&& p_this->psz_object_name
&& !strcmp( p_this->psz_object_name, psz_name ) )
{
- vlc_object_yield( p_this );
+ vlc_object_hold( p_this );
return p_this;
}
- vlc_mutex_lock( &structure_lock );
+ libvlc_lock (p_this->p_libvlc);
/* Otherwise, recursively look for the object */
if( (i_mode & 0x000f) == FIND_ANYWHERE )
p_found = FindObjectName( p_this, psz_name, i_mode );
}
- vlc_mutex_unlock( &structure_lock );
-
+ libvlc_unlock (p_this->p_libvlc);
return p_found;
}
/**
* Increment an object reference counter.
*/
-void __vlc_object_yield( vlc_object_t *p_this )
+void * __vlc_object_hold( vlc_object_t *p_this )
{
vlc_object_internals_t *internals = vlc_internals( p_this );
/* Increment the counter */
internals->i_refcount++;
vlc_spin_unlock( &internals->ref_spin );
+ return p_this;
}
/*****************************************************************************
- * decrement an object refcount
+ * Decrement an object refcount
* And destroy the object if its refcount reach zero.
*****************************************************************************/
void __vlc_object_release( vlc_object_t *p_this )
{
vlc_object_internals_t *internals = vlc_internals( p_this );
+ vlc_object_t *parent = NULL;
bool b_should_destroy;
vlc_spin_lock( &internals->ref_spin );
/* Slow path */
/* Remember that we cannot hold the spin while waiting on the mutex */
- vlc_mutex_lock( &structure_lock );
- /* Take the spin again. Note that another thread may have yielded the
+ libvlc_lock (p_this->p_libvlc);
+ /* Take the spin again. Note that another thread may have held the
* object in the (very short) mean time. */
vlc_spin_lock( &internals->ref_spin );
b_should_destroy = --internals->i_refcount == 0;
if( b_should_destroy )
{
- /* Remove the object from the table so that it cannot be returned from
- * vlc_object_find() and friends. */
- libvlc_global_data_t *p_libvlc_global = vlc_global();
- int i_index;
-
- i_index = FindIndex( p_this, p_libvlc_global->pp_objects,
- p_libvlc_global->i_objects );
- REMOVE_ELEM( p_libvlc_global->pp_objects,
- p_libvlc_global->i_objects, i_index );
- if (p_this->p_parent)
+ /* We have no children */
+ assert (internals->i_children == 0);
+ parent = p_this->p_parent;
+
+#ifndef NDEBUG
+ if( VLC_OBJECT(p_this->p_libvlc) == p_this )
+ {
+ /* Test for leaks */
+ vlc_object_t *leaked = internals->next;
+ while( leaked != p_this )
+ {
+ /* We are leaking this object */
+ fprintf( stderr,
+ "ERROR: leaking object (%p, type:%s, name:%s)\n",
+ leaked, leaked->psz_object_type,
+ leaked->psz_object_name );
+ /* Dump object to ease debugging */
+ vlc_object_dump( leaked );
+ fflush(stderr);
+ leaked = vlc_internals (leaked)->next;
+ }
+
+ if( internals->next != p_this )
+ /* Dump libvlc object to ease debugging */
+ vlc_object_dump( p_this );
+ }
+#endif
+ /* Remove the object from object list
+ * so that it cannot be encountered by vlc_object_get() */
+ vlc_internals (internals->next)->prev = internals->prev;
+ vlc_internals (internals->prev)->next = internals->next;
+
+ if (parent)
+ /* Detach from parent to protect against FIND_CHILDREN */
vlc_object_detach_unlocked (p_this);
}
-
- vlc_mutex_unlock( &structure_lock );
+ libvlc_unlock (p_this->p_libvlc);
if( b_should_destroy )
+ {
+ int canc;
+
+ canc = vlc_savecancel ();
vlc_object_destroy( p_this );
+ vlc_restorecancel (canc);
+ if (parent)
+ vlc_object_release (parent);
+ }
}
/**
{
if( !p_this ) return;
- vlc_mutex_lock( &structure_lock );
+ vlc_object_hold (p_parent);
+ libvlc_lock (p_this->p_libvlc);
/* Attach the parent to its child */
+ assert (!p_this->p_parent);
p_this->p_parent = p_parent;
/* Attach the child to its parent */
- INSERT_ELEM( p_parent->pp_children, p_parent->i_children,
- p_parent->i_children, p_this );
-
- vlc_mutex_unlock( &structure_lock );
+ vlc_object_internals_t *priv = vlc_internals( p_parent );
+ INSERT_ELEM( priv->pp_children, priv->i_children, priv->i_children,
+ p_this );
+ libvlc_unlock (p_this->p_libvlc);
}
static void vlc_object_detach_unlocked (vlc_object_t *p_this)
{
- assert (p_this->p_parent);
+ if (p_this->p_parent == NULL)
+ return;
- DetachObject( p_this );
+ vlc_object_internals_t *priv = vlc_internals( p_this->p_parent );
+
+ int i_index, i;
+
+ /* Remove p_this's parent */
+ p_this->p_parent = NULL;
+
+ /* Remove all of p_parent's children which are p_this */
+ for( i_index = priv->i_children ; i_index-- ; )
+ {
+ if( priv->pp_children[i_index] == p_this )
+ {
+ priv->i_children--;
+ for( i = i_index ; i < priv->i_children ; i++ )
+ priv->pp_children[i] = priv->pp_children[i+1];
+ }
+ }
+
+ if( priv->i_children )
+ {
+ vlc_object_t **pp_children = (vlc_object_t **)
+ realloc( priv->pp_children,
+ priv->i_children * sizeof(vlc_object_t *) );
+ if( pp_children )
+ priv->pp_children = pp_children;
+ }
+ else
+ {
+ /* Special case - don't realloc() to zero to avoid leaking */
+ free( priv->pp_children );
+ priv->pp_children = NULL;
+ }
}
*****************************************************************************/
void __vlc_object_detach( vlc_object_t *p_this )
{
+ vlc_object_t *p_parent;
if( !p_this ) return;
- vlc_mutex_lock( &structure_lock );
-
- if( !p_this->p_parent )
- {
- msg_Err( p_this, "object is not attached" );
- vlc_mutex_unlock( &structure_lock );
- return;
- }
+ libvlc_lock (p_this->p_libvlc);
+ p_parent = p_this->p_parent;
+ if (p_parent)
+ vlc_object_detach_unlocked( p_this );
+ libvlc_unlock (p_this->p_libvlc);
- vlc_object_detach_unlocked( p_this );
- vlc_mutex_unlock( &structure_lock );
+ if (p_parent)
+ vlc_object_release (p_parent);
}
-static void vlc_tree_find (vlc_object_t *node, int type, vlc_list_t *list)
-{
- assert (node);
- vlc_assert_locked (&structure_lock);
-
- if (node->i_object_type == type)
- ListAppend (list, node);
-
- for (int i = 0; i < node->i_children; i++)
- vlc_tree_find (node->pp_children[i], type, list);
-}
-
/**
****************************************************************************
* find a list typed objects and increment their refcount
vlc_list_t * __vlc_list_find( vlc_object_t *p_this, int i_type, int i_mode )
{
vlc_list_t *p_list;
- int i_count = 0, i_index = 0;
- libvlc_global_data_t *p_libvlc_global = vlc_global();
-
- vlc_mutex_lock( &structure_lock );
+ int i_count = 0;
/* Look for the objects */
switch( i_mode & 0x000f )
{
case FIND_ANYWHERE:
- p_list = NewList (0);
- if (p_list != NULL)
- vlc_tree_find (VLC_OBJECT (p_libvlc_global), i_type, p_list);
- break;
+ return vlc_list_find (p_this->p_libvlc, i_type, FIND_CHILD);
case FIND_CHILD:
+ libvlc_lock (p_this->p_libvlc);
i_count = CountChildren( p_this, i_type );
p_list = NewList( i_count );
/* Check allocation was successful */
if( p_list->i_count != i_count )
{
- msg_Err( p_this, "list allocation failed!" );
+ libvlc_unlock (p_this->p_libvlc);
p_list->i_count = 0;
break;
}
p_list->i_count = 0;
ListChildren( p_list, p_this, i_type );
+ libvlc_unlock (p_this->p_libvlc);
break;
default:
break;
}
- vlc_mutex_unlock( &structure_lock );
-
return p_list;
}
+/**
+ * Gets the list of children of an objects, and increment their reference
+ * count.
+ * @return a list (possibly empty) or NULL in case of error.
+ */
+vlc_list_t *__vlc_list_children( vlc_object_t *obj )
+{
+ vlc_list_t *l;
+ vlc_object_internals_t *priv = vlc_internals( obj );
+
+ libvlc_lock (obj->p_libvlc);
+ l = NewList( priv->i_children );
+ for (int i = 0; i < l->i_count; i++)
+ {
+ vlc_object_hold( priv->pp_children[i] );
+ l->p_values[i].p_object = priv->pp_children[i];
+ }
+ libvlc_unlock (obj->p_libvlc);
+ return l;
+}
+
/*****************************************************************************
* DumpCommand: print the current vlc structure
*****************************************************************************
static int DumpCommand( vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
- libvlc_global_data_t *p_libvlc_global = vlc_global();
+ libvlc_int_t *p_libvlc = p_this->p_libvlc;
(void)oldval; (void)p_data;
if( *psz_cmd == 'l' )
{
- vlc_mutex_lock( &structure_lock );
-
- vlc_object_t **pp_current, **pp_end;
-
- pp_current = p_libvlc_global->pp_objects;
- pp_end = pp_current + p_libvlc_global->i_objects;
-
- for( ; pp_current < pp_end ; pp_current++ )
- PrintObject( *pp_current, "" );
+ vlc_object_t *cur = VLC_OBJECT (p_libvlc);
- vlc_mutex_unlock( &structure_lock );
+ libvlc_lock (p_this->p_libvlc);
+ do
+ {
+ PrintObject (cur, "");
+ cur = vlc_internals (cur)->next;
+ }
+ while (cur != VLC_OBJECT(p_libvlc));
+ libvlc_unlock (p_this->p_libvlc);
}
else
{
if( *newval.psz_string )
{
- char *end;
- int i_id = strtol( newval.psz_string, &end, 0 );
- if( end != newval.psz_string )
- p_object = vlc_object_get( i_id );
- else
- {
- /* try using the object's name to find it */
- vlc_object_t *p_libvlc = vlc_object_get( 1 );
- if( p_libvlc )
- {
- /* Look in p_libvlc's children tree */
- p_object = vlc_object_find_name( p_libvlc,
- newval.psz_string,
- FIND_CHILD );
- vlc_object_release( p_libvlc );
- }
- if( !p_object )
- {
- /* If it's not in libvlc, look in libvlc_global (== p_this) */
- p_object = vlc_object_find_name( p_this,
- newval.psz_string,
- FIND_CHILD );
- }
- }
-
+ /* try using the object's name to find it */
+ p_object = vlc_object_find_name( p_this, newval.psz_string,
+ FIND_ANYWHERE );
if( !p_object )
{
return VLC_ENOOBJ;
}
}
- vlc_mutex_lock( &structure_lock );
-
+ libvlc_lock (p_this->p_libvlc);
if( *psz_cmd == 't' )
{
char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
if( !p_object )
- p_object = p_this->p_libvlc ? VLC_OBJECT(p_this->p_libvlc) : p_this;
+ p_object = VLC_OBJECT(p_this->p_libvlc);
psz_foo[0] = '|';
DumpStructure( p_object, 0, psz_foo );
if( p_var->psz_text )
printf( ", %s", p_var->psz_text );
printf( ")" );
+ if( p_var->i_type & VLC_VAR_HASCHOICE )
+ printf( ", has choices" );
if( p_var->i_type & VLC_VAR_ISCOMMAND )
printf( ", command" );
if( p_var->i_entries )
printf( ", %d callbacks", p_var->i_entries );
- switch( p_var->i_type & 0x00f0 )
+ switch( p_var->i_type & VLC_VAR_CLASS )
{
case VLC_VAR_VOID:
case VLC_VAR_MUTEX:
printf( "\n" );
}
}
-
- vlc_mutex_unlock( &structure_lock );
+ libvlc_unlock (p_this->p_libvlc);
if( *newval.psz_string )
{
/*****************************************************************************
* dump an object. (Debug function)
*****************************************************************************/
-void __vlc_object_dump( vlc_object_t *p_this )
+static void vlc_object_dump( vlc_object_t *p_this )
{
- vlc_mutex_lock( &structure_lock );
char psz_foo[2 * MAX_DUMPSTRUCTURE_DEPTH + 1];
psz_foo[0] = '|';
+
DumpStructure( p_this, 0, psz_foo );
- vlc_mutex_unlock( &structure_lock );
}
/* Following functions are local */
-/*****************************************************************************
- * FindIndex: find the index of an object in an array of objects
- *****************************************************************************
- * This function assumes that p_this can be found in pp_objects. It will not
- * crash if p_this cannot be found, but will return a wrong value. It is your
- * duty to check the return value if you are not certain that the object could
- * be found for sure.
- *****************************************************************************/
-static int FindIndex( vlc_object_t *p_this,
- vlc_object_t **pp_objects, int i_count )
-{
- int i_middle = i_count / 2;
-
- if( i_count == 0 )
- {
- return 0;
- }
-
- if( pp_objects[i_middle] == p_this )
- {
- return i_middle;
- }
-
- if( i_count == 1 )
- {
- return 0;
- }
-
- /* We take advantage of the sorted array */
- if( pp_objects[i_middle]->i_object_id < p_this->i_object_id )
- {
- return i_middle + FindIndex( p_this, pp_objects + i_middle,
- i_count - i_middle );
- }
- else
- {
- return FindIndex( p_this, pp_objects, i_middle );
- }
-}
-
static vlc_object_t * FindObject( vlc_object_t *p_this, int i_type, int i_mode )
{
int i;
{
if( p_tmp->i_object_type == i_type )
{
- vlc_object_yield( p_tmp );
+ vlc_object_hold( p_tmp );
return p_tmp;
}
else
break;
case FIND_CHILD:
- for( i = p_this->i_children; i--; )
+ for( i = vlc_internals( p_this )->i_children; i--; )
{
- p_tmp = p_this->pp_children[i];
+ p_tmp = vlc_internals( p_this )->pp_children[i];
if( p_tmp->i_object_type == i_type )
{
- vlc_object_yield( p_tmp );
+ vlc_object_hold( p_tmp );
return p_tmp;
}
- else if( p_tmp->i_children )
+ else if( vlc_internals( p_tmp )->i_children )
{
p_tmp = FindObject( p_tmp, i_type, i_mode );
if( p_tmp )
if( p_tmp->psz_object_name
&& !strcmp( p_tmp->psz_object_name, psz_name ) )
{
- vlc_object_yield( p_tmp );
+ vlc_object_hold( p_tmp );
return p_tmp;
}
else
break;
case FIND_CHILD:
- for( i = p_this->i_children; i--; )
+ for( i = vlc_internals( p_this )->i_children; i--; )
{
- p_tmp = p_this->pp_children[i];
+ p_tmp = vlc_internals( p_this )->pp_children[i];
if( p_tmp->psz_object_name
&& !strcmp( p_tmp->psz_object_name, psz_name ) )
{
- vlc_object_yield( p_tmp );
+ vlc_object_hold( p_tmp );
return p_tmp;
}
- else if( p_tmp->i_children )
+ else if( vlc_internals( p_tmp )->i_children )
{
p_tmp = FindObjectName( p_tmp, psz_name, i_mode );
if( p_tmp )
return NULL;
}
-static void DetachObject( vlc_object_t *p_this )
-{
- vlc_object_t *p_parent = p_this->p_parent;
- int i_index, i;
-
- /* Remove p_this's parent */
- p_this->p_parent = NULL;
-
- /* Remove all of p_parent's children which are p_this */
- for( i_index = p_parent->i_children ; i_index-- ; )
- {
- if( p_parent->pp_children[i_index] == p_this )
- {
- p_parent->i_children--;
- for( i = i_index ; i < p_parent->i_children ; i++ )
- {
- p_parent->pp_children[i] = p_parent->pp_children[i+1];
- }
- }
- }
-
- if( p_parent->i_children )
- {
- p_parent->pp_children = (vlc_object_t **)realloc( p_parent->pp_children,
- p_parent->i_children * sizeof(vlc_object_t *) );
- }
- else
- {
- free( p_parent->pp_children );
- p_parent->pp_children = NULL;
- }
-}
-
static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
{
char psz_children[20], psz_refcount[20], psz_thread[30], psz_name[50],
psz_parent[20];
+ int canc = vlc_savecancel ();
memset( &psz_name, 0, sizeof(psz_name) );
if( p_this->psz_object_name )
{
}
psz_children[0] = '\0';
- switch( p_this->i_children )
+ switch( vlc_internals( p_this )->i_children )
{
case 0:
break;
strcpy( psz_children, ", 1 child" );
break;
default:
- snprintf( psz_children, 19, ", %i children", p_this->i_children );
+ snprintf( psz_children, 19, ", %i children",
+ vlc_internals( p_this )->i_children );
break;
}
psz_parent[0] = '\0';
if( p_this->p_parent )
- snprintf( psz_parent, 19, ", parent %i", p_this->p_parent->i_object_id );
+ snprintf( psz_parent, 19, ", parent %p", p_this->p_parent );
- printf( " %so %.8i %s%s%s%s%s%s\n", psz_prefix,
- p_this->i_object_id, p_this->psz_object_type,
+ printf( " %so %p %s%s%s%s%s%s\n", psz_prefix,
+ p_this, p_this->psz_object_type,
psz_name, psz_thread, psz_refcount, psz_children,
psz_parent );
+ vlc_restorecancel (canc);
}
static void DumpStructure( vlc_object_t *p_this, int i_level, char *psz_foo )
return;
}
- for( i = 0 ; i < p_this->i_children ; i++ )
+ for( i = 0 ; i < vlc_internals( p_this )->i_children ; i++ )
{
if( i_level )
{
}
}
- if( i == p_this->i_children - 1 )
+ if( i == vlc_internals( p_this )->i_children - 1 )
{
psz_foo[i_level] = '`';
}
psz_foo[i_level+1] = '-';
psz_foo[i_level+2] = '\0';
- DumpStructure( p_this->pp_children[i], i_level + 2, psz_foo );
+ DumpStructure( vlc_internals( p_this )->pp_children[i], i_level + 2,
+ psz_foo );
}
}
return;
}
- vlc_object_yield( p_object );
+ vlc_object_hold( p_object );
p_list->p_values[i_index].p_object = p_object;
return;
}
-static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
+/*static void ListAppend( vlc_list_t *p_list, vlc_object_t *p_object )
{
if( p_list == NULL )
{
return;
}
- vlc_object_yield( p_object );
+ vlc_object_hold( p_object );
p_list->p_values[p_list->i_count].p_object = p_object;
p_list->i_count++;
return;
-}
+}*/
static int CountChildren( vlc_object_t *p_this, int i_type )
{
vlc_object_t *p_tmp;
int i, i_count = 0;
- for( i = 0; i < p_this->i_children; i++ )
+ for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
{
- p_tmp = p_this->pp_children[i];
+ p_tmp = vlc_internals( p_this )->pp_children[i];
if( p_tmp->i_object_type == i_type )
{
i_count++;
}
-
- if( p_tmp->i_children )
- {
- i_count += CountChildren( p_tmp, i_type );
- }
+ i_count += CountChildren( p_tmp, i_type );
}
return i_count;
vlc_object_t *p_tmp;
int i;
- for( i = 0; i < p_this->i_children; i++ )
+ for( i = 0; i < vlc_internals( p_this )->i_children; i++ )
{
- p_tmp = p_this->pp_children[i];
+ p_tmp = vlc_internals( p_this )->pp_children[i];
if( p_tmp->i_object_type == i_type )
- {
ListReplace( p_list, p_tmp, p_list->i_count++ );
- }
- if( p_tmp->i_children )
- {
- ListChildren( p_list, p_tmp, i_type );
- }
+ ListChildren( p_list, p_tmp, i_type );
}
}
projects / vlc / blobdiff