feat(init): add deinit_in_progress to lv_globals

With this in LV_EVENT_DELETE displays and indevs can deinit the drivers too

src/core/lv_global.h

@@ -67,6 +67,7 @@ struct _lv_freetype_context_t;
 
 typedef struct _lv_global_t {
     bool inited;
+    bool deinit_in_progress;     /**< Can be used e.g. in the LV_EVENT_DELETE to deinit the drivers too */
 
     lv_ll_t disp_ll;
     struct _lv_display_t * disp_refresh;

src/dev/sdl/lv_sdl_window.c

@@ -11,6 +11,7 @@
 #include <stdbool.h>
 #include "../../core/lv_refr.h"
 #include "../../stdlib/lv_string.h"
+#include "../../core/lv_global.h"
 
 #define SDL_MAIN_HANDLED /*To fix SDL's "undefined reference to WinMain" issue*/
 #include LV_SDL_INCLUDE_PATH
@@ -63,6 +64,8 @@ static bool inited = false;
  **********************/
 static lv_timer_t * event_handler_timer;
 
+#define lv_deinit_in_progress  LV_GLOBAL_DEFAULT()->deinit_in_progress
+
 /**********************
  *      MACROS
  **********************/
@@ -359,6 +362,10 @@ static void res_chg_event_cb(lv_event_t * e)
 
 static void release_disp_cb(lv_event_t * e)
 {
+    if(lv_deinit_in_progress) {
+        lv_sdl_quit();
+    }
+
     lv_display_t * disp = (lv_display_t *) lv_event_get_user_data(e);
 
     lv_sdl_window_t * dsc = lv_display_get_driver_data(disp);

src/lv_init.c

@@ -37,6 +37,7 @@
  *      DEFINES
  *********************/
 #define lv_initialized  LV_GLOBAL_DEFAULT()->inited
+#define lv_deinit_in_progress  LV_GLOBAL_DEFAULT()->deinit_in_progress
 
 /**********************
  *      TYPEDEFS
@@ -296,6 +297,8 @@ void lv_deinit(void)
         return;
     }
 
+    lv_deinit_in_progress = true;
+
 #if LV_USE_SYSMON
     _lv_sysmon_builtin_deinit();
 #endif