busybox/libbb/time.c

/* 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>
/* Old glibc (< 2.3.4) does not provide this constant. We use syscall
 * directly so this definition is safe. */
#ifndef CLOCK_MONOTONIC
#define CLOCK_MONOTONIC 1
#endif

/* libc has incredibly messy way of doing this,
 * typically requiring -lrt. We just skip all this mess */
static void get_mono(struct timespec *ts)
{
	if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
		bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
}
unsigned long long FAST_FUNC monotonic_ns(void)
{
	struct timespec ts;
	get_mono(&ts);
	return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
}
unsigned long long FAST_FUNC monotonic_us(void)
{
	struct timespec ts;
	get_mono(&ts);
	return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
}
unsigned FAST_FUNC monotonic_sec(void)
{
	struct timespec ts;
	get_mono(&ts);
	return ts.tv_sec;
}

#else

unsigned long long FAST_FUNC monotonic_ns(void)
{
	struct timeval tv;
	gettimeofday(&tv, NULL);
	return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
}
unsigned long long FAST_FUNC monotonic_us(void)
{
	struct timeval tv;
	gettimeofday(&tv, NULL);
	return tv.tv_sec * 1000000ULL + tv.tv_usec;
}
unsigned FAST_FUNC monotonic_sec(void)
{
	return time(NULL);
}

#endif
1	niro	816	/* vi: set sw=4 ts=4: */
2			/*
3			* Utility routines.
4			*
5			* Copyright (C) 2007 Denys Vlasenko
6			*
7			* Licensed under GPL version 2, see file LICENSE in this tarball for details.
8			*/
9
10			#include "libbb.h"
11
12			#if ENABLE_MONOTONIC_SYSCALL
13
14			#include <sys/syscall.h>
15			/* Old glibc (< 2.3.4) does not provide this constant. We use syscall
16			* directly so this definition is safe. */
17			#ifndef CLOCK_MONOTONIC
18			#define CLOCK_MONOTONIC 1
19			#endif
20
21			/* libc has incredibly messy way of doing this,
22			* typically requiring -lrt. We just skip all this mess */
23			static void get_mono(struct timespec *ts)
24			{
25			if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
26			bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
27			}
28			unsigned long long FAST_FUNC monotonic_ns(void)
29			{
30			struct timespec ts;
31			get_mono(&ts);
32			return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
33			}
34			unsigned long long FAST_FUNC monotonic_us(void)
35			{
36			struct timespec ts;
37			get_mono(&ts);
38			return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
39			}
40			unsigned FAST_FUNC monotonic_sec(void)
41			{
42			struct timespec ts;
43			get_mono(&ts);
44			return ts.tv_sec;
45			}
46
47			#else
48
49			unsigned long long FAST_FUNC monotonic_ns(void)
50			{
51			struct timeval tv;
52			gettimeofday(&tv, NULL);
53			return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
54			}
55			unsigned long long FAST_FUNC monotonic_us(void)
56			{
57			struct timeval tv;
58			gettimeofday(&tv, NULL);
59			return tv.tv_sec * 1000000ULL + tv.tv_usec;
60			}
61			unsigned FAST_FUNC monotonic_sec(void)
62			{
63			return time(NULL);
64			}
65
66			#endif