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 __USER__ __attribute__((section(".usrtext")))
  21
  22 inline static void
  23 spin()
  24 {
  25     while (1)
  26         ;
  27 }
  28
  29 #ifdef __LUNAIXOS_DEBUG__
  30 #define assert(cond)                                                           \
  31     if (!(cond)) {                                                             \
  32         __assert_fail(#cond, __FILE__, __LINE__);                              \
  33     }
  34
  35 #define assert_msg(cond, msg)                                                  \
  36     if (!(cond)) {                                                             \
  37         __assert_fail(msg, __FILE__, __LINE__);                                \
  38     }
  39 void
  40 __assert_fail(const char* expr, const char* file, unsigned int line)
  41   __attribute__((noinline, noreturn));
  42 #else
  43 #define assert(cond) (void)(cond);          // assert nothing
  44 #define assert_msg(cond, msg) (void)(cond); // assert nothing
  45 #endif
  46
  47 void
  48 panick(const char* msg);
  49
  50 #define wait_until(cond)                                                       \
  51     while (!(cond))                                                            \
  52         ;
  53 #define loop_until(cond)                                                       \
  54     while (!(cond))                                                            \
  55         ;
  56
  57 #define wait_until_expire(cond, max)                                           \
  58     ({                                                                         \
  59         unsigned int __wcounter__ = (max);                                     \
  60         while (!(cond) && __wcounter__-- > 0)                                  \
  61             ;                                                                  \
  62         __wcounter__;                                                          \
  63     })
  64
  65 #endif /* __LUNAIX_SPIKE_H */