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精简settimeofday代码； 

在Linux中settimeofday以及gettimeofday函数的时区功能已经被废弃，因此增加注释予以提示。
gettimeofday实现了tz_minuteswest功能，tz_dsttime功能未实现，按废弃处理；
settimeofday时区功能废弃。
This commit is contained in:
Meco Man 2021-05-01 16:21:52 +08:00
parent 6fa385b987
commit 47de526525
1 changed files with 18 additions and 23 deletions
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37
components/libc/compilers/common/time.c
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@ -124,11 +124,11 @@ static rt_err_t get_timeval(struct timeval *tv)
}
/**
* Set time to RTC device (without timezone, UTC+0)
* Set time to RTC device (without timezone)
* @param tv: struct timeval
* @return the operation status, RT_EOK on successful
*/
static rt_err_t set_timeval(struct timeval *tv)
static int set_timeval(const struct timeval *tv)
{
#ifdef RT_USING_RTC
static rt_device_t device = RT_NULL;
@ -415,9 +415,13 @@ time_t timegm(struct tm * const t)
}
RTM_EXPORT(timegm);
/* TODO: Daylight Saving Time */
int gettimeofday(struct timeval *tv, struct timezone *tz)
{
/* The use of the timezone structure is obsolete;
* the tz argument should normally be specified as NULL.
* The tz_dsttime field has never been used under Linux.
* Thus, the following is purely of historic interest.
*/
if(tz != RT_NULL)
{
tz->tz_dsttime = 0;
@ -436,34 +440,25 @@ int gettimeofday(struct timeval *tv, struct timezone *tz)
}
RTM_EXPORT(gettimeofday);
/* TODO: Daylight Saving Time */
int settimeofday(const struct timeval *tv, const struct timezone *tz)
{
if (tv != RT_NULL)
{
if(tv->tv_sec >= 0 && tv->tv_usec >= 0)
{
if(set_timeval((struct timeval *)tv) == RT_EOK)
/* The use of the timezone structure is obsolete;
* the tz argument should normally be specified as NULL.
* The tz_dsttime field has never been used under Linux.
* Thus, the following is purely of historic interest.
*/
if (tv != RT_NULL
&& tv->tv_sec >= 0
&& tv->tv_usec >= 0
&& set_timeval(tv) == RT_EOK)
{
return 0;
}
else
{
rt_set_errno(EFAULT);
return -1;
}
}
else
{
rt_set_errno(EINVAL);
return -1;
}
}
else
{
rt_set_errno(EFAULT);
return -1;
}
}
RTM_EXPORT(settimeofday);