lunaix-os/includes/lunaix/spike.h

   1 #ifndef __LUNAIX_SPIKE_H
   2 #define __LUNAIX_SPIKE_H
   3
   4 // Some helper functions. As helpful as Spike the Dragon! :)
   5
   6 // 除法向上取整
   7 #define CEIL(v, k) (((v) + (1 << (k)) - 1) >> (k))
   8
   9 #define ICEIL(x, y) ((x) / (y) + ((x) % (y) != 0))
  10
  11 // 除法向下取整
  12 #define FLOOR(v, k) ((v) >> (k))
  13
  14 // 获取v最近的最大k倍数
  15 #define ROUNDUP(v, k) (((v) + (k)-1) & ~((k)-1))
  16
  17 // 获取v最近的最小k倍数
  18 #define ROUNDDOWN(v, k) ((v) & ~((k)-1))
  19
  20 #define MIN(a, b) ((a) < (b) ? (a) : (b))
  21 #define MAX(a, b) ((a) > (b) ? (a) : (b))
  22
  23 #define __USER__ __attribute__((section(".usrtext")))
  24
  25 inline static void
  26 spin()
  27 {
  28     while (1)
  29         ;
  30 }
  31
  32 #ifdef __LUNAIXOS_DEBUG__
  33 #define assert(cond)                                                           \
  34     if (!(cond)) {                                                             \
  35         __assert_fail(#cond, __FILE__, __LINE__);                              \
  36     }
  37
  38 #define assert_msg(cond, msg)                                                  \
  39     if (!(cond)) {                                                             \
  40         __assert_fail(msg, __FILE__, __LINE__);                                \
  41     }
  42 void
  43 __assert_fail(const char* expr, const char* file, unsigned int line)
  44   __attribute__((noinline, noreturn));
  45 #else
  46 #define assert(cond) (void)(cond);          // assert nothing
  47 #define assert_msg(cond, msg) (void)(cond); // assert nothing
  48 #endif
  49
  50 void
  51 panick(const char* msg);
  52
  53 #define wait_until(cond)                                                       \
  54     while (!(cond))                                                            \
  55         ;
  56 #define loop_until(cond)                                                       \
  57     while (!(cond))                                                            \
  58         ;
  59
  60 #define wait_until_expire(cond, max)                                           \
  61     ({                                                                         \
  62         unsigned int __wcounter__ = (max);                                     \
  63         while (!(cond) && __wcounter__-- > 1)                                  \
  64             ;                                                                  \
  65         __wcounter__;                                                          \
  66     })
  67
  68 #endif /* __LUNAIX_SPIKE_H */