1 void rt_components_board_init(void)
 2 {
 3 #if RT_DEBUG_INIT
 4     int result;
 5     const struct rt_init_desc *desc;
 6     for (desc = &__rt_init_desc_rti_board_start; desc < &__rt_init_desc_rti_board_end; desc ++)
 7     {
 8         rt_kprintf("initialize %s", desc->fn_name);
 9         result = desc->fn();
10         rt_kprintf(":%d done\n", result);
11     }
12 #else
13     const init_fn_t *fn_ptr;
14
15     for (fn_ptr = &__rt_init_rti_board_start; fn_ptr < &__rt_init_rti_board_end; fn_ptr++)
16     {
17         (*fn_ptr)();　　　　　　　　　　　　　　//此处回调所有组件的初始化函数
18     }
19 #endif
20 }

 1 /* initialization export */
 2 #ifdef RT_USING_COMPONENTS_INIT
 3 typedef int (*init_fn_t)(void);
 4 #ifdef _MSC_VER /* we do not support MS VC++ compiler */
 5     #define INIT_EXPORT(fn, level)
 6 #else
 7     #if RT_DEBUG_INIT
 8         struct rt_init_desc
 9         {
10             const char* fn_name;
11             const init_fn_t fn;
12         };
13         #define INIT_EXPORT(fn, level)          \
14             const char __rti_##fn##_name[] = #fn; \
15             const struct rt_init_desc __rt_init_desc_##fn SECTION(".rti_fn."level) = \
16             { __rti_##fn##_name, fn};
17     #else
18         #define INIT_EXPORT(fn, level)  \　　　　　　　　　　　　　　　　　　　　　　　　//重点就是在这两行
19             const init_fn_t __rt_init_##fn SECTION(".rti_fn."level) = fn　　　　　　//INIT_APP_EXPORT(rtgui_system_server_init) 相当于__rt_init_rtgui_system_server_init @ .rti_fn.620 #endif 21 #endif 22 #else 

23 #define INIT_EXPORT(fn, level) 24 #endif 2526 /* board init routines will be called in board_init() function */ 27 #define INIT_BOARD_EXPORT(fn) INIT_EXPORT(fn, "1") 28 /* device/component/fs/app init routines will be called in init_thread */ 29 /* device initialization */ 30 #define INIT_DEVICE_EXPORT(fn) INIT_EXPORT(fn, "2") 31 /* components initialization (dfs, lwip, ...) */ 32 #define INIT_COMPONENT_EXPORT(fn) INIT_EXPORT(fn, "3") 33 /* file system initialization (dfs-elm, dfs-rom, ...) */ 34 #define INIT_FS_EXPORT(fn) INIT_EXPORT(fn, "4") 35 /* environment initialization (mount disk, ...) */ 36 #define INIT_ENV_EXPORT(fn) INIT_EXPORT(fn, "5") 37 /* appliation initialization (rtgui application etc ...) */ 38 #define INIT_APP_EXPORT(fn) INIT_EXPORT(fn, "6")

 1 int rtgui_system_server_init(void)
 2 {
 3     rt_mutex_init(&_screen_lock, "screen", RT_IPC_FLAG_FIFO);
 4
 5     /* init image */
 6     rtgui_system_image_init();
 7     /* init font */
 8     rtgui_font_system_init();
 9
10     /* init rtgui server */
11     rtgui_topwin_init();
12     rtgui_server_init();
13
14     /* use driver rect for main window */
15     rtgui_graphic_driver_get_rect(rtgui_graphic_driver_get_default(), &_mainwin_rect);
16
17     /* set the default font */
18 #if RTGUI_DEFAULT_FONT_SIZE == 16
19     rtgui_font_set_defaut(&rtgui_font_asc16);
20 #elif RTGUI_DEFAULT_FONT_SIZE == 12
21     rtgui_font_set_defaut(&rtgui_font_asc12);
22 #else
23     rtgui_font_set_defaut(&rtgui_font_asc12);
24 #endif
25
26     return 0;
27 }
28 INIT_APP_EXPORT(rtgui_system_server_init);