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misc/events.c: Add some debug code. (turnable on and off via #ifdef)

This commit is contained in:
Pierre d'Herbemont 2007-08-25 14:36:58 +00:00
parent 3fdc5f7c7f
commit 8cc3dca1d4
2 changed files with 57 additions and 10 deletions
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12
include/vlc_events.h
View File

@ -104,10 +104,12 @@ typedef struct vlc_event_manager_t
{
void * p_obj;
vlc_mutex_t object_lock;
vlc_object_t *p_parent_object;
DECL_ARRAY(struct vlc_event_listeners_group_t *) listeners_groups;
} vlc_event_manager_t;
/* List of event */
/* Be sure to keep sync-ed with misc/events.c debug name table */
typedef enum vlc_event_type_t {
/* Input item events */
vlc_InputItemMetaChanged,
@ -184,10 +186,12 @@ VLC_EXPORT(void, vlc_event_send, ( vlc_event_manager_t * p_em,
/*
* Add a callback for an event.
*/
VLC_EXPORT(int, vlc_event_attach, ( vlc_event_manager_t * p_event_manager,
vlc_event_type_t event_type,
vlc_event_callback_t pf_callback,
void *p_user_data ));
#define vlc_event_attach(a, b, c, d) __vlc_event_attach(a, b, c, d, #c)
VLC_EXPORT(int, __vlc_event_attach, ( vlc_event_manager_t * p_event_manager,
vlc_event_type_t event_type,
vlc_event_callback_t pf_callback,
void *p_user_data,
const char * psz_debug_name ));
/*
* Remove a callback for an event.

55
src/misc/events.c
View File

@ -39,6 +39,8 @@
* Documentation : Read vlc_events.h
*****************************************************************************/
//#define DEBUG_EVENT
/*****************************************************************************
* Private types.
*****************************************************************************/
@ -47,6 +49,9 @@ typedef struct vlc_event_listener_t
{
void * p_user_data;
vlc_event_callback_t pf_callback;
#ifdef DEBUG_EVENT
char * psz_debug_name;
#endif
} vlc_event_listener_t;
typedef struct vlc_event_listeners_group_t
@ -55,6 +60,16 @@ typedef struct vlc_event_listeners_group_t
DECL_ARRAY(struct vlc_event_listener_t *) listeners;
} vlc_event_listeners_group_t;
#ifdef DEBUG_EVENT
static const char * ppsz_event_type_to_name[] =
{
[vlc_InputItemMetaChanged] = "vlc_InputItemMetaChanged",
[vlc_InputItemSubItemAdded] = "vlc_InputItemSubItemAdded",
[vlc_ServicesDiscoveryItemAdded] = "vlc_ServicesDiscoveryItemAdded",
[vlc_ServicesDiscoveryItemRemoved] = "vlc_ServicesDiscoveryItemRemoved"
}
#endif
/*****************************************************************************
*
*****************************************************************************/
@ -70,6 +85,7 @@ int vlc_event_manager_init( vlc_event_manager_t * p_em, void * p_obj,
vlc_object_t * p_parent_obj )
{
p_em->p_obj = p_obj;
p_em->p_parent_object = p_parent_obj;
vlc_mutex_init( p_parent_obj, &p_em->object_lock );
ARRAY_INIT( p_em->listeners_groups );
return VLC_SUCCESS;
@ -138,6 +154,12 @@ void vlc_event_send( vlc_event_manager_t * p_em,
FOREACH_ARRAY( listener, listeners_group->listeners )
func = listener->pf_callback;
user_data = listener->p_user_data;
#ifdef DEBUG_EVENT
msg_Dbg("Calling '%s' with a '%s' event (data %p)\n",
listener->psz_debug_name,
ppsz_event_type_to_name[event_type],
listener->p_user_data );
#endif
/* This is safe to do that because we are sure
* that there will be no object owned references
* used after the lock. */
@ -154,10 +176,11 @@ void vlc_event_send( vlc_event_manager_t * p_em,
/**
* Add a callback for an event.
*/
int vlc_event_attach( vlc_event_manager_t * p_em,
vlc_event_type_t event_type,
vlc_event_callback_t pf_callback,
void *p_user_data )
int __vlc_event_attach( vlc_event_manager_t * p_em,
vlc_event_type_t event_type,
vlc_event_callback_t pf_callback,
void *p_user_data,
const char * psz_debug_name )
{
vlc_event_listeners_group_t * listeners_group;
vlc_event_listener_t * listener;
@ -167,18 +190,30 @@ int vlc_event_attach( vlc_event_manager_t * p_em,
listener->p_user_data = p_user_data;
listener->pf_callback = pf_callback;
#ifdef DEBUG_EVENT
listener->psz_debug_name = strdup( psz_debug_name );
#else
(void)psz_debug_name;
#endif
vlc_mutex_lock( &p_em->object_lock );
FOREACH_ARRAY( listeners_group, p_em->listeners_groups )
if( listeners_group->event_type == event_type )
{
ARRAY_APPEND( listeners_group->listeners, listener );
#ifdef DEBUG_EVENT
msg_Dbg("Listening to '%s' event with '%s' (data %p)\n",
ppsz_event_type_to_name[event_type],
listener->psz_debug_name,
listener->p_user_data );
#endif
vlc_mutex_unlock( &p_em->object_lock );
return VLC_SUCCESS;
}
FOREACH_END()
vlc_mutex_unlock( &p_em->object_lock );
msg_Err( p_em->p_parent_object, "Can't attach to an object event manager event" );
free(listener);
return VLC_EGENERIC;
}
@ -206,6 +241,14 @@ int vlc_event_detach( vlc_event_manager_t *p_em,
ARRAY_REMOVE( listeners_group->listeners,
fe_idx /* This comes from the macro (and that's why
I hate macro) */ );
#ifdef DEBUG_EVENT
msg_Dbg("Detaching '%s' from '%s' event (data %p)\n",
listener->psz_debug_name,
ppsz_event_type_to_name[event_type],
listener->p_user_data );
free( listener->psz_debug_name );
#endif
free( listener );
vlc_mutex_unlock( &p_em->object_lock );
return VLC_SUCCESS;
@ -215,7 +258,7 @@ int vlc_event_detach( vlc_event_manager_t *p_em,
FOREACH_END()
vlc_mutex_unlock( &p_em->object_lock );
msg_Warn( p_em->p_parent_object, "Can't detach to an object event manager event" );
return VLC_EGENERIC;
}