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libc/time: Implement timespec_get for C11

Browse source 
https://en.cppreference.com/w/c/chrono/timespec_get

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Change-Id: I3eb19c687cb0dc905380b10c931d66e8bb20ac55
This commit is contained in:
Xiang Xiao 2020-06-01 14:17:51 +08:00 committed by patacongo
parent b8b61dc070
commit d1343df68f
1 changed files with 15 additions and 0 deletions
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15
include/time.h
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@ -96,6 +96,10 @@
#define TIMER_ABSTIME 1
/* Time base values for timespec_get. */
#define TIME_UTC 1
#ifndef CONFIG_LIBC_LOCALTIME
/* Local time is the same as gmtime in this implementation */
@ -197,6 +201,17 @@ int clock_settime(clockid_t clockid, FAR const struct timespec *tp);
int clock_gettime(clockid_t clockid, FAR struct timespec *tp);
int clock_getres(clockid_t clockid, FAR struct timespec *res);
#ifdef __cplusplus
inline int timespec_get(FAR struct timespec *t, int b)
{
return b == TIME_UTC ? (clock_gettime(CLOCK_REALTIME, t), b) : 0;
}
#else
#define timespec_get(t, b) \
((b) == TIME_UTC ? (clock_gettime(CLOCK_REALTIME, (t)), (b)) : 0)
#endif
time_t mktime(FAR struct tm *tp);
FAR struct tm *gmtime(FAR const time_t *timep);
FAR struct tm *gmtime_r(FAR const time_t *timep, FAR struct tm *result);