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 // 除法向下取整
  10 #define FLOOR(v, k) ((v) >> (k))
  11
  12 // 获取v最近的最大k倍数
  13 #define ROUNDUP(v, k) (((v) + (k)-1) & ~((k)-1))
  14
  15 // 获取v最近的最小k倍数
  16 #define ROUNDDOWN(v, k) ((v) & ~((k)-1))
  17
  18 #define __USER__ __attribute__((section(".usrtext")))
  19
  20 inline static void
  21 spin()
  22 {
  23     while (1)
  24         ;
  25 }
  26
  27 #ifdef __LUNAIXOS_DEBUG__
  28 #define assert(cond)                                                           \
  29     if (!(cond)) {                                                             \
  30         __assert_fail(#cond, __FILE__, __LINE__);                              \
  31     }
  32
  33 #define assert_msg(cond, msg)                                                  \
  34     if (!(cond)) {                                                             \
  35         __assert_fail(msg, __FILE__, __LINE__);                                \
  36     }
  37 void
  38 __assert_fail(const char* expr, const char* file, unsigned int line)
  39   __attribute__((noinline, noreturn));
  40 #else
  41 #define assert(cond) (void)(cond);          // assert nothing
  42 #define assert_msg(cond, msg) (void)(cond); // assert nothing
  43 #endif
  44
  45 void
  46 panick(const char* msg);
  47
  48 #define wait_until(cond)                                                       \
  49     while (!(cond))                                                            \
  50         ;
  51 #define loop_until(cond)                                                       \
  52     while (!(cond))                                                            \
  53         ;
  54
  55 #define wait_until_expire(cond, max)                                           \
  56     ({                                                                         \
  57         unsigned int __wcounter__ = (max);                                     \
  58         while (!(cond) && __wcounter__-- > 0)                                  \
  59             ;                                                                  \
  60         __wcounter__;                                                          \
  61     })
  62
  63 #endif /* __LUNAIX_SPIKE_H */