blob: 1b52b6c82352dcc3e272800ce152da8db87ebb8c (
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
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
#pragma once
#include <ctime>
#if defined (_WIN32)
# include <windows.h>
# define CLOCK_MONOTONIC -1
static inline void opentrack_clock_gettime(int, struct timespec* ts)
{
static LARGE_INTEGER freq;
if (!freq.QuadPart)
(void) QueryPerformanceFrequency(&freq);
LARGE_INTEGER d;
(void) QueryPerformanceCounter(&d);
d.QuadPart *= 1000000000L;
d.QuadPart /= freq.QuadPart;
ts->tv_sec = d.QuadPart / 1000000000L;
ts->tv_nsec = d.QuadPart % 1000000000L;
}
# define clock_gettime opentrack_clock_gettime
#else
# if defined(__MACH__)
# define CLOCK_MONOTONIC 0
# include <inttypes.h>
# include <mach/mach_time.h>
static inline void clock_gettime(int, struct timespec* ts)
{
static mach_timebase_info_data_t sTimebaseInfo;
uint64_t state, nsec;
if ( sTimebaseInfo.denom == 0 ) {
(void) mach_timebase_info(&sTimebaseInfo);
}
state = mach_absolute_time();
nsec = state * sTimebaseInfo.numer / sTimebaseInfo.denom;
ts->tv_sec = nsec / 1000000000L;
ts->tv_nsec = nsec % 1000000000L;
}
# endif
#endif
class Timer {
private:
struct timespec state;
long conv(const struct timespec& cur)
{
return (cur.tv_sec - state.tv_sec) * 1000000000L + (cur.tv_nsec - state.tv_nsec);
}
public:
Timer() {
start();
}
void start() {
(void) clock_gettime(CLOCK_MONOTONIC, &state);
}
long elapsed() {
struct timespec cur;
(void) clock_gettime(CLOCK_MONOTONIC, &cur);
return conv(cur);
}
long elapsed_ms() {
return elapsed() / 1000000L;
}
};
|
