tools/thermal/lib/uptimeofday.c

   1 // SPDX-License-Identifier: LGPL-2.1+
   2 // Copyright (C) 2022, Linaro Ltd - Daniel Lezcano <daniel.lezcano@linaro.org>
   3 #include <stdio.h>
   4 #include <sys/time.h>
   5 #include <linux/sysinfo.h>
   6 #include "thermal-tools.h"
   7
   8 static unsigned long __offset;
   9 static struct timeval __tv;
  10
  11 int uptimeofday_init(void)
  12 {
  13         struct sysinfo info;
  14
  15         if (sysinfo(&info))
  16                 return -1;
  17
  18         gettimeofday(&__tv, NULL);
  19
  20         __offset = __tv.tv_sec - info.uptime;
  21
  22         return 0;
  23 }
  24
  25 unsigned long getuptimeofday_ms(void)
  26 {
  27         gettimeofday(&__tv, NULL);
  28
  29         return ((__tv.tv_sec - __offset) * 1000) + (__tv.tv_usec / 1000);
  30 }
  31
  32 struct timespec msec_to_timespec(int msec)
  33 {
  34         struct timespec tv = {
  35                 .tv_sec = (msec / 1000),
  36                 .tv_nsec = (msec % 1000) * 1000000,
  37         };
  38
  39         return tv;
  40 }