162 lines
3.9 KiB
C
162 lines
3.9 KiB
C
/**
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* @defgroup time Time
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* @ingroup libc
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*/
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#ifndef _SYS_TIME_H
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#define _SYS_TIME_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <features.h>
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#ifdef __XLT_OS__
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#include <sys/types.h>
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#endif
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#include <sys/select.h>
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/**
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* @ingroup time
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* @par Description:
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* This function gets the time as well as a timezone.
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*
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* @attention
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* <ul>
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* <li>The function is not supported to get timezone,So the second parameter is unused</li>
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* </ul>
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*
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* @retval #0 The function is executed successfully.
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* @retval #-1 The function failed to execute, and corresponding error code is set.
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*
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* @par Errors
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* <ul>
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* <li><b>EINVAL</b>: An invalid Input.</li>
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* </ul>
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*
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* @par Dependency:
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* <ul><li>time.h</li></ul>
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*
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* @see clock_gettime | time | ctime
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*
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* @since Huawei LiteOS V100R001C00
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*/
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int gettimeofday (struct timeval *__restrict, void *__restrict);
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#define ITIMER_REAL 0
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#define ITIMER_VIRTUAL 1
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#define ITIMER_PROF 2
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struct itimerval {
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struct timeval it_interval;
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struct timeval it_value;
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};
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int getitimer (int, struct itimerval *);
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int setitimer (int, const struct itimerval *__restrict, struct itimerval *__restrict);
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int utimes (const char *, const struct timeval [2]);
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#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
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struct timezone {
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int tz_minuteswest;
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int tz_dsttime;
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};
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int futimes(int, const struct timeval [2]);
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int futimesat(int, const char *, const struct timeval [2]);
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int lutimes(const char *, const struct timeval [2]);
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/**
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* @ingroup time
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* @par Description:
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* This function sets the time as well as a timezone.
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*
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* @attention
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* <ul>
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* <li>The function is not supported to set timezone,So the second parameter is unused</li>
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* </ul>
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*
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* @retval #0 The function is executed successfully.
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* @retval #-1 The function failed to execute, and corresponding error code is set.
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*
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* @par Errors
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* <ul>
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* <li><b>EINVAL</b>: An invalid Input.</li>
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* </ul>
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*
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* @par Dependency:
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* <ul><li>time.h</li></ul>
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*
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* @see clock_gettime | time | ctime
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*
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* @since Huawei LiteOS V100R001C00
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*/
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int settimeofday(const struct timeval *, const struct timezone *);
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/**
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* @ingroup time
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* @par Description:
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* This function gradually adjusts the system clock (as returned by gettimeofday).
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*
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* @attention
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* <ul>
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* <li>None.</li>
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* </ul>
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*
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* @retval #0 The function is executed successfully.
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* @retval #-1 The function failed to execute, and corresponding error code is set.
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*
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* @par Errors
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* <ul>
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* <li><b>EINVAL</b>: An invalid input.</li>
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* </ul>
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*
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* @par Dependency:
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* <ul><li>time.h</li></ul>
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*
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* @see gettimeofday | time
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*
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* @since Huawei LiteOS V100R001C00
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*/
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int adjtime (const struct timeval *, struct timeval *);
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#define timerisset(t) ((t)->tv_sec || (t)->tv_usec)
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#define timerclear(t) ((t)->tv_sec = (t)->tv_usec = 0)
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#define timercmp(s,t,op) ((s)->tv_sec == (t)->tv_sec ? \
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(s)->tv_usec op (t)->tv_usec : (s)->tv_sec op (t)->tv_sec)
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#define timeradd(s,t,a) (void) ( (a)->tv_sec = (s)->tv_sec + (t)->tv_sec, \
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((a)->tv_usec = (s)->tv_usec + (t)->tv_usec) >= 1000000 && \
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((a)->tv_usec -= 1000000, (a)->tv_sec++) )
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#define timersub(s,t,a) (void) ( (a)->tv_sec = (s)->tv_sec - (t)->tv_sec, \
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((a)->tv_usec = (s)->tv_usec - (t)->tv_usec) < 0 && \
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((a)->tv_usec += 1000000, (a)->tv_sec--) )
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#endif
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#if defined(_GNU_SOURCE)
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#define TIMEVAL_TO_TIMESPEC(tv, ts) ( \
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(ts)->tv_sec = (tv)->tv_sec, \
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(ts)->tv_nsec = (tv)->tv_usec * 1000, \
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(void)0 )
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#define TIMESPEC_TO_TIMEVAL(tv, ts) ( \
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(tv)->tv_sec = (ts)->tv_sec, \
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(tv)->tv_usec = (ts)->tv_nsec / 1000, \
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(void)0 )
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#endif
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#if _REDIR_TIME64
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__REDIR(gettimeofday, __gettimeofday_time64);
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__REDIR(getitimer, __getitimer_time64);
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__REDIR(setitimer, __setitimer_time64);
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__REDIR(utimes, __utimes_time64);
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#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
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__REDIR(futimes, __futimes_time64);
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__REDIR(futimesat, __futimesat_time64);
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__REDIR(lutimes, __lutimes_time64);
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__REDIR(settimeofday, __settimeofday_time64);
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__REDIR(adjtime, __adjtime64);
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#endif
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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