From 9eaa07a4b141bc80a46cb7ab2dc94048f126fa8c Mon Sep 17 00:00:00 2001 From: William McKinnon Date: Tue, 11 Jul 2023 00:44:26 -0400 Subject: added more scene dependencies, added tinywl --- util/time.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 util/time.c (limited to 'util/time.c') diff --git a/util/time.c b/util/time.c new file mode 100644 index 0000000..06e42b4 --- /dev/null +++ b/util/time.c @@ -0,0 +1,32 @@ +#define _POSIX_C_SOURCE 200809L +#include +#include + +#include "util/time.h" + +static 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; +} + +void timespec_from_nsec(struct timespec *r, int64_t nsec) { + r->tv_sec = nsec / NSEC_PER_SEC; + r->tv_nsec = nsec % NSEC_PER_SEC; +} + +uint32_t get_current_time_msec(void) { + struct timespec now; + 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; + } +} -- cgit v1.2.3