Added gint_set_quit_handler()

include/gint/gint.h

@@ -109,6 +109,16 @@ static GINLINE void *gint_inthandler(int code, void const *h, size_t size) {
    Returns the return value of the callback. */
 extern int (*gint_inth_callback)(gint_call_t const *call);
 
+/* gint_set_quit_handler(): Call a GINT_CALL when the user open another add-in
+   
+   This function use the SetQuitHandler syscall to call a function when the
+   user open another add-in.
+
+   @call  A GINT_CALL
+   @do_world_switch  1 to execute @call in a world_switch. */
+
+void gint_set_quit_handler(gint_call_t gcall, bool do_world_switch);
+
 #ifdef __cplusplus
 }
 #endif

src/kernel/osmenu.c

@@ -13,6 +13,7 @@ int   __GetKeyWait(int *col,int *row,int type,int time,int menu,uint16_t *key);
 void  __ClearKeyBuffer(void); /* ? */
 void *__GetVRAMAddress(void);
 void  __ConfigureStatusArea(int mode);
+void __SetQuitHandler(void (*callback)(void));
 
 static int __osmenu_id;
 
@@ -76,3 +77,28 @@ void gint_osmenu(void)
 {
 	gint_world_switch(GINT_CALL(gint_osmenu_native));
 }
+
+static gint_call_t __gcall;
+static bool __do_world_switch;
+
+static void __handler()
+{
+	if(__do_world_switch){
+		gint_call(__gcall);
+	}else{
+		/* TODO: quit the world switch */
+		gint_call(__gcall);
+	}
+}
+
+static void __sethandler()
+{
+	__SetQuitHandler((void *)__handler);
+}
+
+void gint_set_quit_handler(gint_call_t gcall, bool do_world_switch)
+{
+	__gcall = gcall;
+	__do_world_switch = do_world_switch;
+	gint_world_switch(GINT_CALL(__sethandler));
+}