44 lines
980 B
C
44 lines
980 B
C
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/*
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* vim: sw=2 ts=2 expandtab
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*
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* "THE PIZZA-WARE LICENSE" (derived from "THE BEER-WARE LICENCE"):
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* Thomas Kolb <cfr34k@tkolb.de> wrote this file. As long as you retain this
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* notice you can do whatever you want with this stuff. If we meet some day,
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* and you think this stuff is worth it, you can buy me a pizza in return.
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* - Thomas Kolb
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*/
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#include <errno.h>
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#include <time.h>
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#include <stdint.h>
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#include "utils.h"
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double get_hires_time(void) {
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struct timespec clk;
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clock_gettime(CLOCK_REALTIME, &clk);
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return (double)clk.tv_sec + 1.0e-9f * clk.tv_nsec;
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}
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void fsleep(double d) {
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struct timespec ts;
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ts.tv_sec = (time_t)d;
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ts.tv_nsec = (long)(1e9 * (d - (long)d));
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nanosleep(&ts, NULL);
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}
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void sleep_until(double hires_time) {
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struct timespec tv;
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int ret;
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tv.tv_sec = hires_time;
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tv.tv_nsec = (uint64_t)(1e9 * hires_time) % 1000000000;
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do {
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ret = clock_nanosleep(CLOCK_REALTIME, TIMER_ABSTIME, &tv, NULL);
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} while(ret == EINTR);
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}
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