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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*=========================================================================
Program: Image Guided Surgery Software Toolkit
Module: $RCSfile: igstkRealTimeClock.cxx,v $
Language: C++
Date: $Date: 2008-02-11 01:41:51 $
Version: $Revision: 1.5 $
Copyright (c) ISC Insight Software Consortium. All rights reserved.
See IGSTKCopyright.txt or http://www.igstk.org/copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include <iostream>
#include "igstkRealTimeClock.h"
#if defined(WIN32) || defined(_WIN32)
#include <windows.h>
#else
#include <sys/time.h>
#endif // defined(WIN32) || defined(_WIN32)
namespace igstk
{
RealTimeClock::FrequencyType RealTimeClock::m_Frequency = 1e6;
RealTimeClock::TimeStampType RealTimeClock::m_Difference = 0.0;
RealTimeClock::TimeStampType RealTimeClock::m_Origin = 0.0;
/** Initialize the static variables for the RealTimeClock */
void RealTimeClock::Initialize()
{
#if defined(WIN32) || defined(_WIN32)
LARGE_INTEGER frequency;
::QueryPerformanceFrequency(&frequency);
m_Frequency = static_cast< FrequencyType >( (__int64)frequency.QuadPart );
SYSTEMTIME st1;
SYSTEMTIME st2;
FILETIME ft1;
FILETIME ft2;
::memset( &st1, 0, sizeof( st1 ) );
::memset( &st2, 0, sizeof( st2 ) );
st1.wYear = 1601;
st1.wMonth = 1;
st1.wDay = 1;
st2.wYear = 1970;
st2.wMonth = 1;
st2.wDay = 1;
::SystemTimeToFileTime(&st1, &ft1);
::SystemTimeToFileTime(&st2, &ft2);
LARGE_INTEGER ui1;
LARGE_INTEGER ui2;
memcpy( &ui1, &ft1, sizeof( ui1 ) );
memcpy( &ui2, &ft2, sizeof( ui2 ) );
m_Difference = static_cast< TimeStampType >( ui2.QuadPart - ui1.QuadPart) /
static_cast< TimeStampType >( 1e7 );
FILETIME currentTime;
LARGE_INTEGER intTime;
LARGE_INTEGER tick;
::GetSystemTimeAsFileTime( ¤tTime );
::QueryPerformanceCounter( &tick );
memcpy( &intTime, ¤tTime, sizeof( intTime ) );
m_Origin = static_cast< TimeStampType >( intTime.QuadPart )
/ static_cast< TimeStampType >( 1e7 );
m_Origin -= static_cast< TimeStampType >( (__int64)tick.QuadPart )
/ m_Frequency;
m_Origin += m_Difference;
#else
m_Frequency = 1e6;
#endif // defined(WIN32) || defined(_WIN32)
}
/** Destructor */
RealTimeClock::~RealTimeClock()
{
}
/** Returns a timestamp in seconds */
RealTimeClock::TimeStampType
RealTimeClock::GetTimeStamp()
{
#if defined(WIN32) || defined(_WIN32)
LARGE_INTEGER tick;
::QueryPerformanceCounter( &tick );
TimeStampType value =
static_cast< TimeStampType >( (__int64)tick.QuadPart ) / m_Frequency;
value += m_Origin;
return value*1000; // in milliseconds
#else
struct timeval tval;
::gettimeofday( &tval, 0 );
TimeStampType value = static_cast< TimeStampType >( tval.tv_sec ) +
static_cast< TimeStampType >( tval.tv_usec ) / m_Frequency;
return value*1000; // in milliseconds
#endif // defined(WIN32) || defined(_WIN32)
}
/** Print the object */
void RealTimeClock::Print(std::ostream& os, itk::Indent indent)
{
PrintSelf(os,indent);
}
/** Print the object */
void RealTimeClock::PrintSelf( std::ostream& os, itk::Indent indent )
{
os << indent << "Frequency of the clock: " << m_Frequency << std::endl;
os << indent << "Difference : " << m_Difference << std::endl;
os << indent << "Origin : " << m_Origin << std::endl;
}
namespace // Anonymous namespace
{
class RealTimeClockInitializer
{
public:
RealTimeClockInitializer()
{
igstk::RealTimeClock::Initialize();
}
}; // end RealTimeClockInitializer
RealTimeClockInitializer globalIGSTKRealTimeClockInitialization;
} // Anonymous namespace
} // igstk namespace
|
