85 lines
1.7 KiB
C
85 lines
1.7 KiB
C
/*
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* monotonic.h
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* Copyright (C) 2019 Kovid Goyal <kovid at kovidgoyal.net>
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*
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* Distributed under terms of the GPL3 license.
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*/
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#pragma once
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#include <stdint.h>
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#define MONOTONIC_T_MAX INT64_MAX
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#define MONOTONIC_T_MIN INT64_MIN
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#define MONOTONIC_T_1e6 1000000ll
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#define MONOTONIC_T_1e9 1000000000ll
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typedef int64_t monotonic_t;
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static inline monotonic_t
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s_double_to_monotonic_t(double time) {
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return (monotonic_t)(time * 1e9);
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}
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static inline monotonic_t
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ms_double_to_monotonic_t(double time) {
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return (monotonic_t)(time * 1e6);
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}
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static inline monotonic_t
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s_to_monotonic_t(monotonic_t time) {
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return time * MONOTONIC_T_1e9;
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}
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static inline monotonic_t
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ms_to_monotonic_t(monotonic_t time) {
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return time * MONOTONIC_T_1e6;
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}
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static inline int
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monotonic_t_to_ms(monotonic_t time) {
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return (int)(time / MONOTONIC_T_1e6);
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}
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static inline double
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monotonic_t_to_s_double(monotonic_t time) {
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return ((double)time) / 1e9;
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}
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extern monotonic_t monotonic_start_time;
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extern monotonic_t monotonic_(void);
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static inline monotonic_t
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monotonic(void) {
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return monotonic_() - monotonic_start_time;
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}
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static inline void
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init_monotonic(void) {
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monotonic_start_time = monotonic_();
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}
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#ifdef MONOTONIC_IMPLEMENTATION
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#include <time.h>
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monotonic_t monotonic_start_time = 0;
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static inline monotonic_t
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calc_nano_time(struct timespec time) {
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return ((monotonic_t)time.tv_sec * MONOTONIC_T_1e9) + (monotonic_t)time.tv_nsec;
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}
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monotonic_t
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monotonic_(void) {
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struct timespec ts = {0};
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#ifdef CLOCK_HIGHRES
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clock_gettime(CLOCK_HIGHRES, &ts);
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#elif CLOCK_MONOTONIC_RAW
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clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
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#else
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clock_gettime(CLOCK_MONOTONIC, &ts);
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#endif
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return calc_nano_time(ts);
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}
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#endif
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