lunaix-os/includes/lunaix/ds/ldga.h

   1 /**
   2  * @file ldga.h
   3  * @author Lunaixsky (lunaxisky@qq.com)
   4  * @brief Linker generated array definition
   5  * @version 0.1
   6  * @date 2023-08-18
   7  *
   8  * @copyright Copyright (c) 2023
   9  *
  10  */
  11 #ifndef __LUNAIX_LDGA_H
  12 #define __LUNAIX_LDGA_H
  13
  14 #include <lunaix/types.h>
  15 #include <lunaix/compiler.h>
  16
  17 #define ldga_el_id(ga_name, el_name) __lga_##ga_name##_##el_name
  18 #define ldga_section(ga_name) __attribute__((section(".lga." ga_name)))
  19
  20 #define export_ldga_el(ga_name, el_name, type, val)                            \
  21     type ldga_section(#ga_name) must_emit ldga_el_id(ga_name, el_name) = (type)(val)
  22
  23 #define export_ldga_el_sfx(ga_name, el_name, type, val, suffix)                \
  24     type ldga_section(#ga_name "." #suffix) must_emit ldga_el_id(ga_name, el_name) =     \
  25       (type)(val)
  26
  27 #define export_ldga_el_idx(ga_name, i, type, val)                              \
  28     export_ldga_el(ga_name, i, type, val)
  29 #define export_ldga_el_anon(ga_name, type, val)                                \
  30     export_ldga_el_idx(ga_name, __COUNTER__, type, val)
  31
  32 #define ldga_foreach(ga_name, el_type, index, el)                              \
  33     extern el_type __lga_##ga_name##_start[], __lga_##ga_name##_end;           \
  34     for (index = 0, el = __lga_##ga_name##_start[index];                       \
  35          (ptr_t)&__lga_##ga_name##_start[index] <                              \
  36          (ptr_t)&__lga_##ga_name##_end;                                        \
  37          el = __lga_##ga_name##_start[++index])
  38
  39 /**
  40  * @brief Invoke all elements in the array named `ga_name` of parameterless
  41  * function pointers
  42  *
  43  */
  44 #define ldga_invoke_fn0(ga_name)                                               \
  45     ({                                                                         \
  46         int i = 0;                                                             \
  47         ptr_t fn0;                                                             \
  48         ldga_foreach(ga_name, ptr_t, i, fn0)                                   \
  49         {                                                                      \
  50             ((void (*)())fn0)();                                               \
  51         }                                                                      \
  52     })
  53
  54 #endif /* __LUNAIX_LDGA_H */