#ifndef OS_TIME_H
#define OS_TIME_H
#include "types.h"
#ifdef __cplusplus
extern "C" {
#endif

#define OSDiffTick(tick1, tick0) ((s32)(tick1) - (s32)(tick0))

typedef s64 OSTime;
typedef u32 OSTick;

u32 __busclock AT_ADDRESS(0x800000F8);

#define OS_BUS_CLOCK __busclock

#define OS_TIMER_CLOCK (OS_BUS_CLOCK / 4)

#define OSTicksToSeconds(ticks) ((ticks) / OS_TIMER_CLOCK)
#define OSTicksToMilliseconds(ticks) ((ticks) / (OS_TIMER_CLOCK / 1000))
#define OSTicksToMicroseconds(ticks) (((ticks)*8) / (OS_TIMER_CLOCK / 125000))
#define OSTicksToNanoseconds(ticks) (((ticks)*8000) / (OS_TIMER_CLOCK / 125000))
#define OSSecondsToTicks(sec) ((sec)*OS_TIMER_CLOCK)
#define OSMillisecondsToTicks(msec) ((msec) * (OS_TIMER_CLOCK / 1000))
#define OSMicrosecondsToTicks(usec) (((usec) * (OS_TIMER_CLOCK / 125000)) / 8)
#define OSNanosecondsToTicks(nsec) (((nsec) * (OS_TIMER_CLOCK / 125000)) / 8000)

OSTime OSGetTime(void);
OSTick OSGetTick(void);

typedef struct OSCalendarTime_s {
  int sec;
  int min;
  int hour;
  int mday;
  int mon;
  int year;
  int wday;
  int yday;

  int msec;
  int usec;
} OSCalendarTime;

OSTime OSCalendarTimeToTicks(OSCalendarTime* td);
void OSTicksToCalendarTime(OSTime ticks, OSCalendarTime* td);

#ifdef __cplusplus
}
#endif
#endif