summaryrefslogtreecommitdiffstats
path: root/src/declarative/qml/qperformancetimer.cpp
blob: 141cc55d314756890f5a283ec18b27d242b7c3ed (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
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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
/****************************************************************************
**
** 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 QtQuick1 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 "qperformancetimer_p.h"

#if defined(Q_OS_MAC)
#include <sys/time.h>
#include <unistd.h>
#include <mach/mach_time.h>
#elif defined(Q_OS_SYMBIAN)
#include <e32std.h>
#include <sys/time.h>
#include <hal.h>
#include <hal_data.h>
#elif defined(Q_OS_UNIX)
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#elif defined(Q_OS_WIN)
#include <windows.h>
#endif

// mac/unix code heavily copied from QElapsedTimer

QT_BEGIN_NAMESPACE

////////////////////////////// Mac //////////////////////////////
#if defined(Q_OS_MAC)

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;
}

void QPerformanceTimer::start()
{
    t1 = mach_absolute_time();
}

qint64 QPerformanceTimer::elapsed() const
{
    uint64_t cpu_time = mach_absolute_time();
    return absoluteToNSecs(cpu_time - t1);
}

////////////////////////////// Symbian //////////////////////////////
#elif defined(Q_OS_SYMBIAN)

static qint64 getTimeFromTick(quint64 elapsed)
{
    static TInt freq = 0;
    if (!freq)
        HAL::Get(HALData::EFastCounterFrequency, freq);

    return (elapsed * 1000000000) / freq;
}

void QPerformanceTimer::start()
{
    t1 = User::FastCounter();
}

qint64 QPerformanceTimer::elapsed() const
{
    return getTimeFromTick(User::FastCounter() - t1);
}


////////////////////////////// Unix //////////////////////////////
#elif defined(Q_OS_UNIX)

#if defined(QT_NO_CLOCK_MONOTONIC) || defined(QT_BOOTSTRAPPED)
// turn off the monotonic clock
# ifdef _POSIX_MONOTONIC_CLOCK
#  undef _POSIX_MONOTONIC_CLOCK
# endif
# define _POSIX_MONOTONIC_CLOCK -1
#endif

#if (_POSIX_MONOTONIC_CLOCK-0 != 0)
static const bool monotonicClockChecked = true;
static const bool monotonicClockAvailable = _POSIX_MONOTONIC_CLOCK > 0;
#else
static int monotonicClockChecked = false;
static int monotonicClockAvailable = false;
#endif

#ifdef Q_CC_GNU
# define is_likely(x) __builtin_expect((x), 1)
#else
# define is_likely(x) (x)
#endif
#define load_acquire(x) ((volatile const int&)(x))
#define store_release(x,v) ((volatile int&)(x) = (v))

static void unixCheckClockType()
{
#if (_POSIX_MONOTONIC_CLOCK-0 == 0)
    if (is_likely(load_acquire(monotonicClockChecked)))
        return;

# if defined(_SC_MONOTONIC_CLOCK)
    // detect if the system support monotonic timers
    long x = sysconf(_SC_MONOTONIC_CLOCK);
    store_release(monotonicClockAvailable, x >= 200112L);
# endif

    store_release(monotonicClockChecked, true);
#endif
}

static inline void do_gettime(qint64 *sec, qint64 *frac)
{
#if (_POSIX_MONOTONIC_CLOCK-0 >= 0)
    unixCheckClockType();
    if (is_likely(monotonicClockAvailable)) {
        timespec ts;
        clock_gettime(CLOCK_MONOTONIC, &ts);
        *sec = ts.tv_sec;
        *frac = ts.tv_nsec;
        return;
    }
#endif
    *sec = 0;
    *frac = 0;
}

void QPerformanceTimer::start()
{
    do_gettime(&t1, &t2);
}

qint64 QPerformanceTimer::elapsed() const
{
    qint64 sec, frac;
    do_gettime(&sec, &frac);
    sec = sec - t1;
    frac = frac - t2;

    return sec * Q_INT64_C(1000000000) + frac;
}

////////////////////////////// Windows //////////////////////////////
#elif defined(Q_OS_WIN)

static qint64 getTimeFromTick(quint64 elapsed)
{
    static LARGE_INTEGER freq;
    if (!freq.QuadPart)
        QueryPerformanceFrequency(&freq);
    return 1000000000 * elapsed / freq.QuadPart;
}

void QPerformanceTimer::start()
{
    LARGE_INTEGER li;
    QueryPerformanceCounter(&li);
    t1 = li.QuadPart;
}

qint64 QPerformanceTimer::elapsed() const
{
    LARGE_INTEGER li;
    QueryPerformanceCounter(&li);
    return getTimeFromTick(li.QuadPart - t1);
}

////////////////////////////// Default //////////////////////////////
#else

// default implementation (no hi-perf timer) does nothing
void QPerformanceTimer::start()
{
}

qint64 QPerformanceTimer::elapsed() const
{
    return 0;
}

#endif

QT_END_NAMESPACE