blob: f8f124f6a9e0cfe409aca233f78ef3e24cac3de2 (
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
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
|
/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qelapsedtimer.h"
#include <sys/time.h>
#include <unistd.h>
#include <mach/mach_time.h>
QT_BEGIN_NAMESPACE
QElapsedTimer::ClockType QElapsedTimer::clockType()
{
return MachAbsoluteTime;
}
bool QElapsedTimer::isMonotonic()
{
return true;
}
static mach_timebase_info_data_t info = {0,0};
static qint64 absoluteToNSecs(qint64 cpuTime)
{
if (info.denom == 0)
mach_timebase_info(&info);
qint64 nsecs = cpuTime * info.numer / info.denom;
return nsecs;
}
static qint64 absoluteToMSecs(qint64 cpuTime)
{
return absoluteToNSecs(cpuTime) / 1000000;
}
timeval qt_gettime()
{
timeval tv;
uint64_t cpu_time = mach_absolute_time();
uint64_t nsecs = absoluteToNSecs(cpu_time);
tv.tv_sec = nsecs / 1000000000ull;
tv.tv_usec = (nsecs / 1000) - (tv.tv_sec * 1000000);
return tv;
}
void QElapsedTimer::start()
{
t1 = mach_absolute_time();
t2 = 0;
}
qint64 QElapsedTimer::restart()
{
qint64 old = t1;
t1 = mach_absolute_time();
t2 = 0;
return absoluteToMSecs(t1 - old);
}
qint64 QElapsedTimer::nsecsElapsed() const
{
uint64_t cpu_time = mach_absolute_time();
return absoluteToNSecs(cpu_time - t1);
}
qint64 QElapsedTimer::elapsed() const
{
uint64_t cpu_time = mach_absolute_time();
return absoluteToMSecs(cpu_time - t1);
}
qint64 QElapsedTimer::msecsSinceReference() const
{
return absoluteToMSecs(t1);
}
qint64 QElapsedTimer::msecsTo(const QElapsedTimer &other) const
{
return absoluteToMSecs(other.t1 - t1);
}
qint64 QElapsedTimer::secsTo(const QElapsedTimer &other) const
{
return msecsTo(other) / 1000;
}
bool operator<(const QElapsedTimer &v1, const QElapsedTimer &v2)
{
return v1.t1 < v2.t1;
}
QT_END_NAMESPACE
|
