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[libc/time] Add microseconds time get feature in gettimeofday.

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This commit is contained in:
armink 2021-04-14 20:10:47 +08:00
parent 2a66024bdc
commit 76be91c7de
1 changed files with 34 additions and 25 deletions
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59
components/libc/compilers/common/time.c
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@ -120,7 +120,7 @@ struct tm* localtime_r(const time_t* t, struct tm* r)
time_t local_tz; time_t local_tz;
int utc_plus; int utc_plus;
utc_plus = 0; /* GTM: UTC+0 */ utc_plus = 8; /* GMT: UTC+8 */
local_tz = *t + utc_plus * 3600; local_tz = *t + utc_plus * 3600;
return gmtime_r(&local_tz, r); return gmtime_r(&local_tz, r);
} }
@ -183,18 +183,14 @@ char* ctime(const time_t *tim_p)
} }
RTM_EXPORT(ctime); RTM_EXPORT(ctime);
/** static void get_timeval(struct timeval *tv)
* Returns the current time.
*
* @param time_t * t the timestamp pointer, if not used, keep NULL.
*
* @return The value ((time_t)-1) is returned if the calendar time is not available.
* If timer is not a NULL pointer, the return value is also stored in timer.
*
*/
RT_WEAK time_t time(time_t *t)
{ {
time_t time_now = ((time_t)-1); /* default is not available */ if (tv == RT_NULL)
return;
/* default is not available */
tv->tv_sec = -1;
/* default is 0 */
tv->tv_usec = 0;
#ifdef RT_USING_RTC #ifdef RT_USING_RTC
static rt_device_t device = RT_NULL; static rt_device_t device = RT_NULL;
@ -210,26 +206,41 @@ RT_WEAK time_t time(time_t *t)
{ {
if (rt_device_open(device, 0) == RT_EOK) if (rt_device_open(device, 0) == RT_EOK)
{ {
rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time_now); rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &tv->tv_sec);
rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME_US, &tv->tv_usec);
rt_device_close(device); rt_device_close(device);
} }
} }
#endif /* RT_USING_RTC */ #endif /* RT_USING_RTC */
/* if t is not NULL, write timestamp to *t */ if (tv->tv_sec == (time_t) -1)
if (t != RT_NULL)
{
*t = time_now;
}
if(time_now == (time_t)-1)
{ {
/* LOG_W will cause a recursive printing if ulog timestamp function is turned on */ /* LOG_W will cause a recursive printing if ulog timestamp function is turned on */
rt_kprintf("Cannot find a RTC device to provide time!\r\n"); rt_kprintf("Cannot find a RTC device to provide time!\r\n");
errno = ENOSYS; errno = ENOSYS;
} }
}
return time_now; /**
* Returns the current time.
*
* @param time_t * t the timestamp pointer, if not used, keep NULL.
*
* @return The value ((time_t)-1) is returned if the calendar time is not available.
* If timer is not a NULL pointer, the return value is also stored in timer.
*
*/
RT_WEAK time_t time(time_t *t)
{
struct timeval now;
get_timeval(&now);
if (t)
{
*t = now.tv_sec;
}
return now.tv_sec;
} }
RTM_EXPORT(time); RTM_EXPORT(time);
@ -344,12 +355,10 @@ RTM_EXPORT(timegm);
/* TODO: timezone */ /* TODO: timezone */
int gettimeofday(struct timeval *tv, struct timezone *tz) int gettimeofday(struct timeval *tv, struct timezone *tz)
{ {
time_t t = time(RT_NULL); get_timeval(tv);
if (tv != RT_NULL && t != (time_t)-1) if (tv != RT_NULL && tv->tv_sec != (time_t) -1)
{ {
tv->tv_sec = t;
tv->tv_usec = 0;
return 0; return 0;
} }
else else