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https://code.videolan.org/videolan/vlc
synced 2024-10-03 01:31:53 +02:00
misc/events.c: Add some debug code. (turnable on and off via #ifdef)
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@ -104,10 +104,12 @@ typedef struct vlc_event_manager_t
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{
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void * p_obj;
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vlc_mutex_t object_lock;
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vlc_object_t *p_parent_object;
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DECL_ARRAY(struct vlc_event_listeners_group_t *) listeners_groups;
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} vlc_event_manager_t;
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/* List of event */
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/* Be sure to keep sync-ed with misc/events.c debug name table */
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typedef enum vlc_event_type_t {
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/* Input item events */
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vlc_InputItemMetaChanged,
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@ -184,10 +186,12 @@ VLC_EXPORT(void, vlc_event_send, ( vlc_event_manager_t * p_em,
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/*
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* Add a callback for an event.
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*/
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VLC_EXPORT(int, vlc_event_attach, ( vlc_event_manager_t * p_event_manager,
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#define vlc_event_attach(a, b, c, d) __vlc_event_attach(a, b, c, d, #c)
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VLC_EXPORT(int, __vlc_event_attach, ( vlc_event_manager_t * p_event_manager,
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vlc_event_type_t event_type,
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vlc_event_callback_t pf_callback,
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void *p_user_data ));
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void *p_user_data,
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const char * psz_debug_name ));
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/*
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* Remove a callback for an event.
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@ -39,6 +39,8 @@
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* Documentation : Read vlc_events.h
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*****************************************************************************/
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//#define DEBUG_EVENT
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/*****************************************************************************
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* Private types.
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*****************************************************************************/
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@ -47,6 +49,9 @@ typedef struct vlc_event_listener_t
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{
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void * p_user_data;
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vlc_event_callback_t pf_callback;
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#ifdef DEBUG_EVENT
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char * psz_debug_name;
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#endif
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} vlc_event_listener_t;
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typedef struct vlc_event_listeners_group_t
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@ -55,6 +60,16 @@ typedef struct vlc_event_listeners_group_t
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DECL_ARRAY(struct vlc_event_listener_t *) listeners;
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} vlc_event_listeners_group_t;
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#ifdef DEBUG_EVENT
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static const char * ppsz_event_type_to_name[] =
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{
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[vlc_InputItemMetaChanged] = "vlc_InputItemMetaChanged",
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[vlc_InputItemSubItemAdded] = "vlc_InputItemSubItemAdded",
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[vlc_ServicesDiscoveryItemAdded] = "vlc_ServicesDiscoveryItemAdded",
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[vlc_ServicesDiscoveryItemRemoved] = "vlc_ServicesDiscoveryItemRemoved"
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}
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#endif
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/*****************************************************************************
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*
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*****************************************************************************/
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@ -70,6 +85,7 @@ int vlc_event_manager_init( vlc_event_manager_t * p_em, void * p_obj,
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vlc_object_t * p_parent_obj )
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{
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p_em->p_obj = p_obj;
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p_em->p_parent_object = p_parent_obj;
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vlc_mutex_init( p_parent_obj, &p_em->object_lock );
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ARRAY_INIT( p_em->listeners_groups );
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return VLC_SUCCESS;
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@ -138,6 +154,12 @@ void vlc_event_send( vlc_event_manager_t * p_em,
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FOREACH_ARRAY( listener, listeners_group->listeners )
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func = listener->pf_callback;
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user_data = listener->p_user_data;
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#ifdef DEBUG_EVENT
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msg_Dbg("Calling '%s' with a '%s' event (data %p)\n",
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listener->psz_debug_name,
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ppsz_event_type_to_name[event_type],
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listener->p_user_data );
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#endif
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/* This is safe to do that because we are sure
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* that there will be no object owned references
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* used after the lock. */
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@ -154,10 +176,11 @@ void vlc_event_send( vlc_event_manager_t * p_em,
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/**
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* Add a callback for an event.
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*/
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int vlc_event_attach( vlc_event_manager_t * p_em,
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int __vlc_event_attach( vlc_event_manager_t * p_em,
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vlc_event_type_t event_type,
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vlc_event_callback_t pf_callback,
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void *p_user_data )
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void *p_user_data,
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const char * psz_debug_name )
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{
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vlc_event_listeners_group_t * listeners_group;
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vlc_event_listener_t * listener;
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@ -167,18 +190,30 @@ int vlc_event_attach( vlc_event_manager_t * p_em,
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listener->p_user_data = p_user_data;
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listener->pf_callback = pf_callback;
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#ifdef DEBUG_EVENT
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listener->psz_debug_name = strdup( psz_debug_name );
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#else
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(void)psz_debug_name;
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#endif
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vlc_mutex_lock( &p_em->object_lock );
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FOREACH_ARRAY( listeners_group, p_em->listeners_groups )
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if( listeners_group->event_type == event_type )
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{
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ARRAY_APPEND( listeners_group->listeners, listener );
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#ifdef DEBUG_EVENT
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msg_Dbg("Listening to '%s' event with '%s' (data %p)\n",
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ppsz_event_type_to_name[event_type],
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listener->psz_debug_name,
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listener->p_user_data );
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#endif
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vlc_mutex_unlock( &p_em->object_lock );
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return VLC_SUCCESS;
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}
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FOREACH_END()
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vlc_mutex_unlock( &p_em->object_lock );
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msg_Err( p_em->p_parent_object, "Can't attach to an object event manager event" );
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free(listener);
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return VLC_EGENERIC;
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}
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@ -206,6 +241,14 @@ int vlc_event_detach( vlc_event_manager_t *p_em,
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ARRAY_REMOVE( listeners_group->listeners,
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fe_idx /* This comes from the macro (and that's why
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I hate macro) */ );
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#ifdef DEBUG_EVENT
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msg_Dbg("Detaching '%s' from '%s' event (data %p)\n",
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listener->psz_debug_name,
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ppsz_event_type_to_name[event_type],
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listener->p_user_data );
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free( listener->psz_debug_name );
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#endif
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free( listener );
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vlc_mutex_unlock( &p_em->object_lock );
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return VLC_SUCCESS;
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@ -215,7 +258,7 @@ int vlc_event_detach( vlc_event_manager_t *p_em,
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FOREACH_END()
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vlc_mutex_unlock( &p_em->object_lock );
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msg_Warn( p_em->p_parent_object, "Can't detach to an object event manager event" );
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return VLC_EGENERIC;
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}
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