OpenCloudOS-Kernel/tools/thermal/lib/uptimeofday.c

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// SPDX-License-Identifier: LGPL-2.1+
// Copyright (C) 2022, Linaro Ltd - Daniel Lezcano <daniel.lezcano@linaro.org>
#include <stdio.h>
#include <sys/time.h>
#include <linux/sysinfo.h>
#include "thermal-tools.h"
static unsigned long __offset;
static struct timeval __tv;
int uptimeofday_init(void)
{
struct sysinfo info;
if (sysinfo(&info))
return -1;
gettimeofday(&__tv, NULL);
__offset = __tv.tv_sec - info.uptime;
return 0;
}
unsigned long getuptimeofday_ms(void)
{
gettimeofday(&__tv, NULL);
return ((__tv.tv_sec - __offset) * 1000) + (__tv.tv_usec / 1000);
}
struct timespec msec_to_timespec(int msec)
{
struct timespec tv = {
.tv_sec = (msec / 1000),
.tv_nsec = (msec % 1000) * 1000000,
};
return tv;
}