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clock_gettime, clock_gettime64 - get time of a specified clock
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Syntax | #include <time.h> int clock_gettime(clockid_t clk_id, struct timespec *tp); int clock_gettime64(clockid_t clk_id, struct timespec64 *tp); |
Description In the structure which points to tp, clock_gettime() and clock_gettime64() supply the
| time of the clock that is pecified by clk_id as the number of seconds and milliseconds which
have passed since the reference date (epoch). Only the system-wide real time clock
CLOCK_REALTIME is supported. It supplies the number of seconds and nanoseconds
which have passed since the reference date (epoch). The reference date is 1/1/1970 00:00:00. |
Return val. | 0 -1 | if successful. if an error occurs. errno is set to indicate the error. |
Error | clock_gettime() will fail, if:
EINVAL the specified clk_id is not supported.
|
See also | gettimeofday |
