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Commit fe436b8a authored by Rémi Duraffort's avatar Rémi Duraffort
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dbus: fix a bunch of assert/crash about locking (playlist functions used in the callbacks).

parent c611e0c6
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Showing with 132 additions and 48 deletions
modules/control/dbus.c
View file @ fe436b8a
......@@ -69,14 +69,11 @@ static void Run ( intf_thread_t * );
static int StateChange( vlc_object_t *, const char *, vlc_value_t,
vlc_value_t, void * );
static int TrackChange( vlc_object_t *, const char *, vlc_value_t,
vlc_value_t, void * );
static int TrackChange( intf_thread_t * );
static int StatusChangeEmit( intf_thread_t *);
static int TrackListChangeEmit( intf_thread_t *, int, int );
static int StatusChangeEmit( vlc_object_t *, const char *, vlc_value_t,
vlc_value_t, void * );
static int TrackListChangeEmit( vlc_object_t *, const char *, vlc_value_t,
vlc_value_t, void * );
static int AllCallback( vlc_object_t*, const char*, vlc_value_t, vlc_value_t, void* );
static int GetInputMeta ( input_item_t *, DBusMessageIter * );
static int MarshalStatus ( intf_thread_t *, DBusMessageIter *, bool );
......@@ -95,14 +92,35 @@ enum
CAPS_CAN_HAS_TRACKLIST = 1 << 6
};
// The signal that can be get from the callbacks
enum
{
SIGNAL_ITEM_CURRENT,
SIGNAL_INTF_CHANGE,
SIGNAL_PLAYLIST_ITEM_APPEND,
SIGNAL_PLAYLIST_ITEM_DELETED,
SIGNAL_RANDOM,
SIGNAL_LOOP,
SIGNAL_STATE
};
struct intf_sys_t
{
DBusConnection *p_conn;
bool b_meta_read;
bool b_meta_read;
dbus_int32_t i_caps;
bool b_dead;
bool b_dead;
vlc_array_t *p_events;
vlc_mutex_t lock;
};
typedef struct
{
int signal;
int i_node;
} callback_info_t;
/*****************************************************************************
* Module descriptor
*****************************************************************************/
......@@ -748,19 +766,21 @@ static int Open( vlc_object_t *p_this )
p_playlist = pl_Hold( p_intf );
PL_LOCK;
var_AddCallback( p_playlist, "item-current", TrackChange, p_intf );
var_AddCallback( p_playlist, "intf-change", TrackListChangeEmit, p_intf );
var_AddCallback( p_playlist, "playlist-item-append", TrackListChangeEmit, p_intf );
var_AddCallback( p_playlist, "playlist-item-deleted", TrackListChangeEmit, p_intf );
var_AddCallback( p_playlist, "random", StatusChangeEmit, p_intf );
var_AddCallback( p_playlist, "repeat", StatusChangeEmit, p_intf );
var_AddCallback( p_playlist, "loop", StatusChangeEmit, p_intf );
var_AddCallback( p_playlist, "item-current", AllCallback, p_intf );
var_AddCallback( p_playlist, "intf-change", AllCallback, p_intf );
var_AddCallback( p_playlist, "playlist-item-append", AllCallback, p_intf );
var_AddCallback( p_playlist, "playlist-item-deleted", AllCallback, p_intf );
var_AddCallback( p_playlist, "random", AllCallback, p_intf );
var_AddCallback( p_playlist, "repeat", AllCallback, p_intf );
var_AddCallback( p_playlist, "loop", AllCallback, p_intf );
PL_UNLOCK;
pl_Release( p_intf );
p_intf->pf_run = Run;
p_intf->p_sys = p_sys;
p_sys->p_conn = p_conn;
p_sys->p_events = vlc_array_new();
vlc_mutex_init( &p_sys->lock );
UpdateCaps( p_intf, false );
......@@ -777,13 +797,13 @@ static void Close ( vlc_object_t *p_this )
playlist_t *p_playlist = pl_Hold( p_intf );;
input_thread_t *p_input;
var_DelCallback( p_playlist, "item-current", TrackChange, p_intf );
var_DelCallback( p_playlist, "intf-change", TrackListChangeEmit, p_intf );
var_DelCallback( p_playlist, "playlist-item-append", TrackListChangeEmit, p_intf );
var_DelCallback( p_playlist, "playlist-item-deleted", TrackListChangeEmit, p_intf );
var_DelCallback( p_playlist, "random", StatusChangeEmit, p_intf );
var_DelCallback( p_playlist, "repeat", StatusChangeEmit, p_intf );
var_DelCallback( p_playlist, "loop", StatusChangeEmit, p_intf );
var_DelCallback( p_playlist, "item-current", AllCallback, p_intf );
var_DelCallback( p_playlist, "intf-change", AllCallback, p_intf );
var_DelCallback( p_playlist, "playlist-item-append", AllCallback, p_intf );
var_DelCallback( p_playlist, "playlist-item-deleted", AllCallback, p_intf );
var_DelCallback( p_playlist, "random", AllCallback, p_intf );
var_DelCallback( p_playlist, "repeat", AllCallback, p_intf );
var_DelCallback( p_playlist, "loop", AllCallback, p_intf );
p_input = playlist_CurrentInput( p_playlist );
if ( p_input )
......@@ -796,6 +816,8 @@ static void Close ( vlc_object_t *p_this )
dbus_connection_unref( p_intf->p_sys->p_conn );
vlc_mutex_destroy( &p_intf->p_sys->lock );
vlc_array_destroy( p_intf->p_sys->p_events );
free( p_intf->p_sys );
}
......@@ -810,10 +832,79 @@ static void Run ( intf_thread_t *p_intf )
msleep( INTF_IDLE_SLEEP );
int canc = vlc_savecancel();
dbus_connection_read_write_dispatch( p_intf->p_sys->p_conn, 0 );
// Get the messages
vlc_mutex_lock( &p_intf->p_sys->lock );
for( int i = vlc_array_count( p_intf->p_sys->p_events ) - 1; i >= 0; i-- )
{
callback_info_t* info = vlc_array_item_at_index( p_intf->p_sys->p_events, i );
switch( info->signal )
{
case SIGNAL_ITEM_CURRENT:
TrackChange( p_intf );
break;
case SIGNAL_INTF_CHANGE:
case SIGNAL_PLAYLIST_ITEM_APPEND:
case SIGNAL_PLAYLIST_ITEM_DELETED:
TrackListChangeEmit( p_intf, info->signal, info->i_node );
break;
case SIGNAL_RANDOM:
case SIGNAL_LOOP:
case SIGNAL_STATE:
StatusChangeEmit( p_intf );
break;
default:
assert(0);
}
free( info );
vlc_array_remove( p_intf->p_sys->p_events, i );
}
vlc_mutex_unlock( &p_intf->p_sys->lock );
vlc_restorecancel( canc );
}
}
// Get all the callbacks
static int AllCallback( vlc_object_t *p_this, const char *psz_var,
vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
(void)p_this;
(void)oldval;
intf_thread_t *p_intf = (intf_thread_t*)p_data;
callback_info_t *info = malloc( sizeof( callback_info_t ) );
if( !info )
return VLC_ENOMEM;
// Wich event is it ?
if( !strcmp( "item-current", psz_var ) )
info->signal = SIGNAL_ITEM_CURRENT;
else if( !strcmp( "intf-change", psz_var ) )
info->signal = SIGNAL_INTF_CHANGE;
else if( !strcmp( "playlist-item-append", psz_var ) )
{
info->signal = SIGNAL_PLAYLIST_ITEM_APPEND;
info->i_node = ((playlist_add_t*)newval.p_address)->i_node;
}
else if( !strcmp( "playlist-item-deleted", psz_var ) )
info->signal = SIGNAL_PLAYLIST_ITEM_DELETED;
else if( !strcmp( "random", psz_var ) )
info->signal = SIGNAL_RANDOM;
else if( !strcmp( "loop", psz_var ) )
info->signal = SIGNAL_LOOP;
else if( !strcmp( "state", psz_var ) )
info->signal = SIGNAL_STATE;
else
assert(0);
// Append the event
vlc_mutex_lock( &p_intf->p_sys->lock );
vlc_array_append( p_intf->p_sys->p_events, info );
vlc_mutex_unlock( &p_intf->p_sys->lock );
return VLC_SUCCESS;
}
/******************************************************************************
* CapsChange: player capabilities change signal
*****************************************************************************/
......@@ -846,31 +937,33 @@ DBUS_SIGNAL( TrackListChangeSignal )
* TrackListChangeEmit: Emits the TrackListChange signal
*****************************************************************************/
/* FIXME: It is not called on tracklist reordering */
static int TrackListChangeEmit( vlc_object_t *p_this, const char *psz_var,
vlc_value_t oldval, vlc_value_t newval, void *p_data )
static int TrackListChangeEmit( intf_thread_t *p_intf, int signal, int i_node )
{
VLC_UNUSED(oldval);
intf_thread_t *p_intf = p_data;
if( !strcmp( psz_var, "playlist-item-append" ) )
// "playlist-item-append"
if( signal == SIGNAL_PLAYLIST_ITEM_APPEND )
{
/* don't signal when items are added/removed in p_category */
playlist_t *p_playlist = (playlist_t*)p_this;
playlist_add_t *p_add = newval.p_address;
playlist_item_t *p_item;
p_item = playlist_ItemGetById( p_playlist, p_add->i_node );
playlist_t *p_playlist = pl_Hold( p_intf );
PL_LOCK;
playlist_item_t *p_item = playlist_ItemGetById( p_playlist, i_node );
assert( p_item );
while( p_item->p_parent )
p_item = p_item->p_parent;
if( p_item == p_playlist->p_root_category )
{
PL_UNLOCK;
pl_Release( p_intf );
return VLC_SUCCESS;
}
PL_UNLOCK;
pl_Release( p_intf );
}
if( p_intf->p_sys->b_dead )
return VLC_SUCCESS;
UpdateCaps( p_intf, true );
TrackListChangeSignal( p_intf->p_sys->p_conn, p_data );
UpdateCaps( p_intf, pl_Unlocked );
TrackListChangeSignal( p_intf->p_sys->p_conn, p_intf );
return VLC_SUCCESS;
}
/*****************************************************************************
......@@ -941,34 +1034,25 @@ static int StateChange( vlc_object_t *p_this, const char* psz_var,
/*****************************************************************************
* StatusChangeEmit: Emits the StatusChange signal
*****************************************************************************/
static int StatusChangeEmit( vlc_object_t *p_this, const char *psz_var,
vlc_value_t oldval, vlc_value_t newval, void *p_data )
static int StatusChangeEmit( intf_thread_t * p_intf )
{
VLC_UNUSED(p_this); VLC_UNUSED(psz_var);
VLC_UNUSED(oldval); VLC_UNUSED(newval);
intf_thread_t *p_intf = p_data;
if( p_intf->p_sys->b_dead )
return VLC_SUCCESS;
UpdateCaps( p_intf, false );
StatusChangeSignal( p_intf->p_sys->p_conn, p_data );
UpdateCaps( p_intf, pl_Unlocked );
StatusChangeSignal( p_intf->p_sys->p_conn, p_intf );
return VLC_SUCCESS;
}
/*****************************************************************************
* TrackChange: callback on playlist "item-current"
*****************************************************************************/
static int TrackChange( vlc_object_t *p_this, const char *psz_var,
vlc_value_t oldval, vlc_value_t newval, void *p_data )
static int TrackChange( intf_thread_t *p_intf )
{
intf_thread_t *p_intf = ( intf_thread_t* ) p_data;
intf_sys_t *p_sys = p_intf->p_sys;
playlist_t *p_playlist;
input_thread_t *p_input = NULL;
input_item_t *p_item = NULL;
VLC_UNUSED( p_this ); VLC_UNUSED( psz_var );
VLC_UNUSED( oldval ); VLC_UNUSED( newval );
if( p_intf->p_sys->b_dead )
return VLC_SUCCESS;
......
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