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, 2 insertions, 5 deletions

diff --git a/apps/settings.c b/apps/settings.c
index 58d58788be..f2a923e24d 100644
--- a/apps/settings.c
+++ b/apps/settings.c
@@ -591,15 +591,13 @@ static bool settings_write_config(const char* filename, int options)
     return true;
 }
 #ifndef HAVE_RTC_RAM
-static void flush_global_status_callback(void *data)
+static void flush_global_status_callback(void)
 {
-    (void)data;
     write_nvram_data(nvram_buffer,NVRAM_BLOCK_SIZE);
 }
 #endif
-static void flush_config_block_callback(void *data)
+static void flush_config_block_callback(void)
 {
-    (void)data;
     write_nvram_data(nvram_buffer,NVRAM_BLOCK_SIZE);
     settings_write_config(CONFIGFILE, SETTINGS_SAVE_CHANGED);
 }
@@ -1307,4 +1305,3 @@ void set_file(const char* filename, char* setting, const int maxlen)
     strlcpy(setting, fptr, len);
     settings_save();
 }
-