blob: 3aa0ee318f4d728f3474668daa42440af599bf70 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) 2007 Denys Vlasenko
*
* Licensed under GPL version 2, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
#if ENABLE_MONOTONIC_SYSCALL
#include <sys/syscall.h>
/* libc has incredibly messy way of doing this,
* typically requiring -lrt. We just skip all this mess */
unsigned long long monotonic_us(void)
{
struct timespec ts;
if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts))
bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
}
unsigned monotonic_sec(void)
{
struct timespec ts;
if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts))
bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
return ts.tv_sec;
}
#else
unsigned long long monotonic_us(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000000ULL + tv.tv_usec;
}
unsigned monotonic_sec(void)
{
return time(NULL);
}
#endif
|
