#if defined (HAVE_SYS_EVENTFD_H)
# include <sys/eventfd.h>
+# ifndef EFD_CLOEXEC
+# define EFD_CLOEXEC 0
+# warning EFD_CLOEXEC missing. Consider updating libc.
+# endif
#endif
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 )
+#undef vlc_custom_create
+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_priv->b_thread = false;
p_new->p_parent = NULL;
p_priv->first = NULL;
+#ifndef NDEBUG
+ p_priv->old_parent = NULL;
+#endif
/* Initialize mutexes and condvars */
vlc_mutex_init( &p_priv->var_lock );
return vlc_custom_create( p_this, i_size, VLC_OBJECT_GENERIC, "generic" );
}
-
+#undef vlc_object_set_destructor
/**
****************************************************************************
* Set the destructor of a vlc object
* when the object is destroyed when the its refcount reaches 0.
* (It is called by the internal function vlc_object_destroy())
*****************************************************************************/
-void __vlc_object_set_destructor( vlc_object_t *p_this,
- vlc_destructor_t pf_destructor )
+void vlc_object_set_destructor( vlc_object_t *p_this,
+ vlc_destructor_t pf_destructor )
{
vlc_object_internals_t *p_priv = vlc_internals(p_this );
/* This can only ever happen if someone killed us without locking: */
assert (internals->pipes[1] == -1);
+ /* pipe() is not a cancellation point, but write() is and eventfd() is
+ * unspecified (not in POSIX). */
+ int canc = vlc_savecancel ();
#if defined (HAVE_SYS_EVENTFD_H)
- internals->pipes[0] = internals->pipes[1] = eventfd (0, 0);
+ internals->pipes[0] = internals->pipes[1] = eventfd (0, EFD_CLOEXEC);
if (internals->pipes[0] == -1)
#endif
{
msg_Dbg (obj, "waitpipe: object already dying");
write (internals->pipes[1], &(uint64_t){ 1 }, sizeof (uint64_t));
}
+ vlc_restorecancel (canc);
}
vlc_mutex_unlock (&pipe_lock);
return internals->pipes[0];
}
-
+#undef vlc_object_kill
/**
* Requests termination of an object, cancels the object thread, and make the
* object wait pipe (if it exists) readable. Not a cancellation point.
*/
-void __vlc_object_kill( vlc_object_t *p_this )
+void vlc_object_kill( vlc_object_t *p_this )
{
vlc_object_internals_t *priv = vlc_internals( p_this );
int fd = -1;
}
}
-
+#undef vlc_object_find
/*****************************************************************************
* find a typed object and increment its refcount
*****************************************************************************
* This function recursively looks for a given object type. i_mode can be one
* of FIND_PARENT, FIND_CHILD or FIND_ANYWHERE.
*****************************************************************************/
-void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
+void * vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
{
vlc_object_t *p_found;
/* Otherwise, recursively look for the object */
if (i_mode == FIND_ANYWHERE)
- return vlc_object_find (p_this->p_libvlc, i_type, FIND_CHILD);
+ return vlc_object_find (VLC_OBJECT(p_this->p_libvlc), i_type, FIND_CHILD);
switch (i_type)
{
return p_found;
}
+#undef vlc_object_hold
/**
* Increment an object reference counter.
*/
-void * __vlc_object_hold( vlc_object_t *p_this )
+void * vlc_object_hold( vlc_object_t *p_this )
{
vlc_object_internals_t *internals = vlc_internals( p_this );
return p_this;
}
+#undef vlc_object_release
/*****************************************************************************
* Decrement an object refcount
* And destroy the object if its refcount reach zero.
*****************************************************************************/
-void __vlc_object_release( vlc_object_t *p_this )
+void vlc_object_release( vlc_object_t *p_this )
{
vlc_object_internals_t *internals = vlc_internals( p_this );
vlc_object_t *parent = NULL;
}
}
+#undef vlc_object_attach
/**
****************************************************************************
* attach object to a parent object
* This function sets p_this as a child of p_parent, and p_parent as a parent
* of p_this. This link can be undone using vlc_object_detach.
*****************************************************************************/
-void __vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
+void vlc_object_attach( vlc_object_t *p_this, vlc_object_t *p_parent )
{
if( !p_this ) return;
vlc_object_internals_t *pap = vlc_internals (p_parent);
vlc_object_internals_t *priv = vlc_internals (p_this);
+ vlc_object_t *p_old_parent;
priv->prev = NULL;
vlc_object_hold (p_parent);
libvlc_lock (p_this->p_libvlc);
+#ifndef NDEBUG
+ /* Reparenting an object carries a risk of invalid access to the parent,
+ * from another thread. This can happen when inheriting a variable, or
+ * through any direct access to vlc_object_t.p_parent. Also, reparenting
+ * brings a functional bug, whereby the reparented object uses incorrect
+ * old values for inherited variables (as the new parent may have different
+ * variable values, especially if it is an input).
+ * Note that the old parent may be already destroyed.
+ * So its pointer must not be dereferenced.
+ */
+ if (priv->old_parent)
+ msg_Info (p_this, "Reparenting an object is dangerous (%p -> %p)!",
+ priv->old_parent, p_parent);
+#endif
+
+ p_old_parent = p_this->p_parent;
+ if (p_old_parent)
+ vlc_object_detach_unlocked (p_this);
/* Attach the parent to its child */
- assert (!p_this->p_parent);
p_this->p_parent = p_parent;
/* Attach the child to its parent */
priv->next->prev = priv;
pap->first = priv;
libvlc_unlock (p_this->p_libvlc);
+
+ if (p_old_parent)
+ vlc_object_release (p_old_parent);
}
static void vlc_object_detach_unlocked (vlc_object_t *p_this)
{
- if (p_this->p_parent == NULL)
- return;
+ assert (p_this->p_parent != NULL);
vlc_object_internals_t *pap = vlc_internals (p_this->p_parent);
vlc_object_internals_t *priv = vlc_internals (p_this);
priv->next->prev = priv->prev;
/* Remove p_this's parent */
+#ifndef NDEBUG
+ priv->old_parent = p_this->p_parent;
+#endif
p_this->p_parent = NULL;
}
-
+#undef vlc_object_detach
/**
****************************************************************************
* detach object from its parent
*****************************************************************************
* This function removes all links between an object and its parent.
*****************************************************************************/
-void __vlc_object_detach( vlc_object_t *p_this )
+void vlc_object_detach( vlc_object_t *p_this )
{
vlc_object_t *p_parent;
if( !p_this ) return;
vlc_object_release (p_parent);
}
+#undef vlc_list_children
/**
* 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 *vlc_list_children( vlc_object_t *obj )
{
vlc_list_t *l;
vlc_object_internals_t *priv;
MYCASE( VARIABLE, "variable" );
MYCASE( FLOAT, "float" );
MYCASE( TIME, "time" );
+ MYCASE( COORDS, "coords" );
MYCASE( ADDRESS, "address" );
MYCASE( MUTEX, "mutex" );
MYCASE( LIST, "list" );
case VLC_VAR_TIME:
printf( ": %"PRIi64, (int64_t)p_var->val.i_time );
break;
+ case VLC_VAR_COORDS:
+ printf( ": %"PRId32"x%"PRId32,
+ p_var->val.coords.x, p_var->val.coords.y );
+ break;
case VLC_VAR_ADDRESS:
printf( ": %p", p_var->val.p_address );
break;
projects / vlc / blobdiff