events: Rework event subsystem (add_event, send_event) to be more versatile.

add_event_ex is added that takes an extra user_data pointer. This pointer is
passed to the callback (add_event and add_event_ex have slightly different
callbacks types). All callbacks also get the event id passed. Events added
with add_event_ex must be removed with remove_event_ex because the user_data
pointer must match in addition to the callback pointer.

On the other add_event is simplified to omit the oneshort parameter which
was almost always false (still there with add_event_ex).

As a side effect the ata_idle_notify callbacks are changed as well, they
do not take a data parameter anymore which was always NULL anyway.

This commit also adds some documentation to events.h

Change-Id: I13e29a0f88ef908f175b376d83550f9e0231f772

1 files changed, 3 insertions, 2 deletions

diff --git a/apps/plugins/mpegplayer/mpegplayer.c b/apps/plugins/mpegplayer/mpegplayer.c
index 928c48ab11..467c961912 100644
--- a/apps/plugins/mpegplayer/mpegplayer.c
+++ b/apps/plugins/mpegplayer/mpegplayer.c
@@ -1026,8 +1026,9 @@ static void fps_init(void)
 
 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
 /* So we can refresh the overlay */
-static void osd_lcd_enable_hook(void* param)
+static void osd_lcd_enable_hook(unsigned short id, void* param)
 {
+    (void)id;
     (void)param;
     rb->queue_post(rb->button_queue, LCD_ENABLE_EVENT_1, 0);
 }
@@ -1043,7 +1044,7 @@ static void osd_backlight_on_video_mode(bool video_on)
 #endif
     } else {
 #if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
-        rb->add_event(LCD_EVENT_ACTIVATION, false, osd_lcd_enable_hook);
+        rb->add_event(LCD_EVENT_ACTIVATION, osd_lcd_enable_hook);
 #endif
         /* Revert to user's backlight settings */
         backlight_use_settings();