1 /**
2  * @file lv_async.c
3  *
4  */
5 
6 /*********************
7  *      INCLUDES
8  *********************/
9 
10 #include "lv_async.h"
11 
12 /*********************
13  *      DEFINES
14  *********************/
15 
16 /**********************
17  *      TYPEDEFS
18  **********************/
19 
20 /**********************
21  *  STATIC PROTOTYPES
22  **********************/
23 
24 static void lv_async_task_cb(lv_task_t * task);
25 
26 /**********************
27  *  STATIC VARIABLES
28  **********************/
29 
30 /**********************
31  *      MACROS
32  **********************/
33 
34 /**********************
35  *   GLOBAL FUNCTIONS
36  **********************/
37 
lv_async_call(lv_async_cb_t async_xcb,void * user_data)38 lv_res_t lv_async_call(lv_async_cb_t async_xcb, void * user_data)
39 {
40     /*Allocate an info structure */
41     lv_async_info_t * info = lv_mem_alloc(sizeof(lv_async_info_t));
42 
43     if(info == NULL)
44         return LV_RES_INV;
45 
46     /* Create a new task */
47     /* Use highest priority so that it will run before a refresh */
48     lv_task_t * task = lv_task_create(lv_async_task_cb, 0, LV_TASK_PRIO_HIGHEST, info);
49 
50     if(task == NULL) {
51         lv_mem_free(info);
52         return LV_RES_INV;
53     }
54 
55     info->cb = async_xcb;
56     info->user_data = user_data;
57 
58     /* Set the task's user data */
59     task->user_data = info;
60     lv_task_set_repeat_count(task, 1);
61     return LV_RES_OK;
62 }
63 
64 /**********************
65  *   STATIC FUNCTIONS
66  **********************/
67 
lv_async_task_cb(lv_task_t * task)68 static void lv_async_task_cb(lv_task_t * task)
69 {
70     lv_async_info_t * info = (lv_async_info_t *)task->user_data;
71 
72     info->cb(info->user_data);
73 
74     lv_mem_free(info);
75 }
76