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52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
#ifndef _LINUX_TIME64_H
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#define _LINUX_TIME64_H
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#include <linux/types.h>
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#define timespec64 timespec
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typedef __s64 time64_t;
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/* Parameters used to convert the timespec values: */
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#define MSEC_PER_SEC 1000L
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#define USEC_PER_MSEC 1000L
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#define NSEC_PER_USEC 1000L
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#define NSEC_PER_MSEC 1000000L
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#define USEC_PER_SEC 1000000L
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#define NSEC_PER_SEC 1000000000L
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#define FSEC_PER_SEC 1000000000000000LL
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static inline struct timespec ns_to_timespec(const u64 nsec)
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{
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return (struct timespec) {
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.tv_sec = nsec / NSEC_PER_SEC,
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.tv_nsec = nsec % NSEC_PER_SEC,
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};
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}
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static inline s64 timespec_to_ns(const struct timespec *ts)
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{
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return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
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}
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static inline struct timespec timespec_trunc(struct timespec t, unsigned gran)
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{
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/* Avoid division in the common cases 1 ns and 1 s. */
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if (gran == 1) {
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/* nothing */
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} else if (gran == NSEC_PER_SEC) {
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t.tv_nsec = 0;
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} else if (gran > 1 && gran < NSEC_PER_SEC) {
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t.tv_nsec -= t.tv_nsec % gran;
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} else {
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WARN(1, "illegal file time granularity: %u", gran);
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}
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return t;
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}
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#define ns_to_timespec64 ns_to_timespec
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#define timespec64_to_ns timespec_to_ns
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#define timespec64_trunc timespec_trunc
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#endif /* _LINUX_TIME64_H */
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