rt-thread-official/components/libc/compilers/dlib/time.c

#include <sys/time.h>
#include <rtthread.h>

#ifdef RT_USING_DEVICE
int gettimeofday(struct timeval *tp, void *ignore)
{
    time_t time;
    rt_device_t device;

    device = rt_device_find("rtc");
    if (device != RT_NULL)
    {
        rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
        if (tp != RT_NULL)
        {
            tp->tv_sec = time;
            tp->tv_usec = 0;
        }

        return time;
    }

    return 0;
}
#endif

/**
 * Returns the current time.
 *
 * @param time_t * t the timestamp pointer, if not used, keep NULL.
 *
 * @return time_t return timestamp current.
 *
 */
#pragma module_name = "?time"
#if _DLIB_TIME_ALLOW_64
time_t __time64(time_t *t)
#else
time_t __time32(time_t *t)
#endif
{
  time_t time_now = 0;
  
#ifdef RT_USING_RTC
  static rt_device_t device = RT_NULL;
  
  /* optimization: find rtc device only first. */
  if (device == RT_NULL)
  {
    device = rt_device_find("rtc");
  }
  
  /* read timestamp from RTC device. */
  if (device != RT_NULL)
  {
    if (rt_device_open(device, 0) == RT_EOK)
    {
      rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time_now);
      rt_device_close(device);
    }
  }
#endif /* RT_USING_RTC */
  
  /* if t is not NULL, write timestamp to *t */
  if (t != RT_NULL)
  {
    *t = time_now;
  }
  
  return time_now;
}

RT_WEAK clock_t clock(void)
{
    return rt_tick_get();
}