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#ifndef UTIL_TIME_H
#define UTIL_TIME_H
#include <stdint.h>
#include <time.h>
static const long NSEC_PER_SEC = 1000000000;
/**
* Get the current time, in milliseconds.
*/
int64_t get_current_time_msec(void);
/**
* Convert a timespec to milliseconds.
*/
int64_t timespec_to_msec(const struct timespec *a);
/**
* Convert a timespec to nanoseconds.
*/
int64_t timespec_to_nsec(const struct timespec *a);
/**
* Convert nanoseconds to a timespec.
*/
void timespec_from_nsec(struct timespec *r, int64_t nsec);
/**
* Subtracts timespec `b` from timespec `a`, and stores the difference in `r`.
*/
void timespec_sub(struct timespec *r, const struct timespec *a,
const struct timespec *b);
#endif
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