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util/time: move timespec_sub to time utilities

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Tudor Brindus 2020-06-05 17:56:13 -04:00 • committed by Simon Ser
parent c9c31f803e
commit 363bf44a35
3 changed files with 19 additions and 11 deletions
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12
util/time.c
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@ -4,6 +4,8 @@
#include "util/time.h"
const long NSEC_PER_SEC = 1000000000;
int64_t timespec_to_msec(const struct timespec *a) {
return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
}
@ -13,3 +15,13 @@ uint32_t get_current_time_msec(void) {
clock_gettime(CLOCK_MONOTONIC, &now);
return timespec_to_msec(&now);
}
void timespec_sub(struct timespec *r, const struct timespec *a,
const struct timespec *b) {
r->tv_sec = a->tv_sec - b->tv_sec;
r->tv_nsec = a->tv_nsec - b->tv_nsec;
if (r->tv_nsec < 0) {
r->tv_sec--;
r->tv_nsec += NSEC_PER_SEC;
}
}