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Diffstat (limited to 'libbb')
-rw-r--r--libbb/time.c29
1 files changed, 23 insertions, 6 deletions
diff --git a/libbb/time.c b/libbb/time.c
index 7d3ac9183..850ac1542 100644
--- a/libbb/time.c
+++ b/libbb/time.c
@@ -10,8 +10,8 @@
10#include "libbb.h" 10#include "libbb.h"
11 11
12#if ENABLE_MONOTONIC_SYSCALL 12#if ENABLE_MONOTONIC_SYSCALL
13#include <sys/syscall.h>
14 13
14#include <sys/syscall.h>
15/* Old glibc (< 2.3.4) does not provide this constant. We use syscall 15/* Old glibc (< 2.3.4) does not provide this constant. We use syscall
16 * directly so this definition is safe. */ 16 * directly so this definition is safe. */
17#ifndef CLOCK_MONOTONIC 17#ifndef CLOCK_MONOTONIC
@@ -20,30 +20,47 @@
20 20
21/* libc has incredibly messy way of doing this, 21/* libc has incredibly messy way of doing this,
22 * typically requiring -lrt. We just skip all this mess */ 22 * typically requiring -lrt. We just skip all this mess */
23static 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}
28unsigned 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}
23unsigned long long FAST_FUNC monotonic_us(void) 34unsigned long long FAST_FUNC monotonic_us(void)
24{ 35{
25 struct timespec ts; 36 struct timespec ts;
26 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts)) 37 get_mono(&ts);
27 bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
28 return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000; 38 return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
29} 39}
30unsigned FAST_FUNC monotonic_sec(void) 40unsigned FAST_FUNC monotonic_sec(void)
31{ 41{
32 struct timespec ts; 42 struct timespec ts;
33 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts)) 43 get_mono(&ts);
34 bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
35 return ts.tv_sec; 44 return ts.tv_sec;
36} 45}
46
37#else 47#else
48
49unsigned 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}
38unsigned long long FAST_FUNC monotonic_us(void) 55unsigned long long FAST_FUNC monotonic_us(void)
39{ 56{
40 struct timeval tv; 57 struct timeval tv;
41 gettimeofday(&tv, NULL); 58 gettimeofday(&tv, NULL);
42 return tv.tv_sec * 1000000ULL + tv.tv_usec; 59 return tv.tv_sec * 1000000ULL + tv.tv_usec;
43} 60}
44
45unsigned FAST_FUNC monotonic_sec(void) 61unsigned FAST_FUNC monotonic_sec(void)
46{ 62{
47 return time(NULL); 63 return time(NULL);
48} 64}
65
49#endif 66#endif