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qelapsedtimer_unix.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2016 The Qt Company Ltd.-
4** Copyright (C) 2016 Intel Corporation.-
5** Contact: https://www.qt.io/licensing/-
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7** This file is part of the QtCore module of the Qt Toolkit.-
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39****************************************************************************/-
40-
41#include "qelapsedtimer.h"-
42#if defined(Q_OS_VXWORKS)-
43#include "qfunctions_vxworks.h"-
44#else-
45#include <sys/time.h>-
46#include <time.h>-
47#endif-
48#include <unistd.h>-
49-
50#include <qatomic.h>-
51#include "private/qcore_unix_p.h"-
52-
53#if defined(QT_NO_CLOCK_MONOTONIC) || defined(QT_BOOTSTRAPPED)-
54// turn off the monotonic clock-
55# ifdef _POSIX_MONOTONIC_CLOCK-
56# undef _POSIX_MONOTONIC_CLOCK-
57# endif-
58# define _POSIX_MONOTONIC_CLOCK -1-
59#endif-
60-
61QT_BEGIN_NAMESPACE-
62-
63/*-
64 * Design:-
65 *-
66 * POSIX offers a facility to select the system's monotonic clock when getting-
67 * the current timestamp. Whereas the functions are mandatory in POSIX.1-2008,-
68 * the presence of a monotonic clock is a POSIX Option (see the document-
69 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap02.html#tag_02_01_06 )-
70 *-
71 * The macro _POSIX_MONOTONIC_CLOCK can therefore assume the following values:-
72 * -1 monotonic clock is never supported on this system-
73 * 0 monotonic clock might be supported, runtime check is needed-
74 * >1 (such as 200809L) monotonic clock is always supported-
75 *-
76 * The unixCheckClockType() function will return the clock to use: either-
77 * CLOCK_MONOTONIC or CLOCK_REALTIME. In the case the POSIX option has a value-
78 * of zero, then this function stores a static that contains the clock to be-
79 * used.-
80 *-
81 * There's one extra case, which is when CLOCK_REALTIME isn't defined. When-
82 * that's the case, we'll emulate the clock_gettime function with gettimeofday.-
83 *-
84 * Conforming to:-
85 * POSIX.1b-1993 section "Clocks and Timers"-
86 * included in UNIX98 (Single Unix Specification v2)-
87 * included in POSIX.1-2001-
88 * see http://pubs.opengroup.org/onlinepubs/9699919799/functions/clock_getres.html-
89 */-
90-
91#if !defined(CLOCK_REALTIME)-
92# define CLOCK_REALTIME 0-
93static inline void qt_clock_gettime(int, struct timespec *ts)-
94{-
95 // support clock_gettime with gettimeofday-
96 struct timeval tv;-
97 gettimeofday(&tv, 0);-
98 ts->tv_sec = tv.tv_sec;-
99 ts->tv_nsec = tv.tv_usec * 1000;-
100}-
101-
102# ifdef _POSIX_MONOTONIC_CLOCK-
103# undef _POSIX_MONOTONIC_CLOCK-
104# define _POSIX_MONOTONIC_CLOCK -1-
105# endif-
106#else-
107static inline void qt_clock_gettime(clockid_t clock, struct timespec *ts)-
108{-
109 clock_gettime(clock, ts);-
110}
executed 13428957 times by 670 tests: end of block
Executed by:
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  • tst_LargeFile
  • tst_ModelTest
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13428957
111#endif-
112-
113static int unixCheckClockType()-
114{-
115#ifdef Q_OS_LINUX-
116 // Despite glibc claiming that we should check at runtime, the Linux kernel-
117 // always supports the monotonic clock-
118 return CLOCK_MONOTONIC;
executed 19794545 times by 907 tests: return 1;
Executed by:
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19794545
119#elif (_POSIX_MONOTONIC_CLOCK-0 == 0) && defined(_SC_MONOTONIC_CLOCK)-
120 // we need a value we can store in a clockid_t that isn't a valid clock-
121 // check if the valid ones are both non-negative or both non-positive-
122# if CLOCK_MONOTONIC >= 0 && CLOCK_REALTIME >= 0-
123# define IS_VALID_CLOCK(clock) (clock >= 0)-
124# define INVALID_CLOCK -1-
125# elif CLOCK_MONOTONIC <= 0 && CLOCK_REALTIME <= 0-
126# define IS_VALID_CLOCK(clock) (clock <= 0)-
127# define INVALID_CLOCK 1-
128# else-
129# error "Sorry, your system has weird values for CLOCK_MONOTONIC and CLOCK_REALTIME"-
130# endif-
131-
132 static QBasicAtomicInt clockToUse = Q_BASIC_ATOMIC_INITIALIZER(INVALID_CLOCK);-
133 int clock = clockToUse.loadAcquire();-
134 if (Q_LIKELY(IS_VALID_CLOCK(clock)))-
135 return clock;-
136-
137 // detect if the system supports monotonic timers-
138 clock = sysconf(_SC_MONOTONIC_CLOCK) > 0 ? CLOCK_MONOTONIC : CLOCK_REALTIME;-
139 clockToUse.storeRelease(clock);-
140 return clock;-
141-
142# undef INVALID_CLOCK-
143# undef IS_VALID_CLOCK-
144#elif (_POSIX_MONOTONIC_CLOCK-0) > 0-
145 return CLOCK_MONOTONIC;-
146#else-
147 return CLOCK_REALTIME;-
148#endif-
149}-
150-
151bool QElapsedTimer::isMonotonic() Q_DECL_NOTHROW-
152{-
153 return clockType() == MonotonicClock;
executed 4145156 times by 666 tests: return clockType() == MonotonicClock;
Executed by:
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  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
4145156
154}-
155-
156QElapsedTimer::ClockType QElapsedTimer::clockType() Q_DECL_NOTHROW-
157{-
158 return unixCheckClockType() == CLOCK_REALTIME ? SystemTime : MonotonicClock;
executed 6365588 times by 903 tests: return unixCheckClockType() == 0 ? SystemTime : MonotonicClock;
Executed by:
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  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
6365588
159}-
160-
161static inline void do_gettime(qint64 *sec, qint64 *frac)-
162{-
163 timespec ts;-
164 qt_clock_gettime(unixCheckClockType(), &ts);-
165 *sec = ts.tv_sec;-
166 *frac = ts.tv_nsec;-
167}
executed 13428957 times by 670 tests: end of block
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
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13428957
168-
169// used in qcore_unix.cpp and qeventdispatcher_unix.cpp-
170struct timespec qt_gettime() Q_DECL_NOTHROW-
171{-
172 qint64 sec, frac;-
173 do_gettime(&sec, &frac);-
174-
175 timespec tv;-
176 tv.tv_sec = sec;-
177 tv.tv_nsec = frac;-
178-
179 return tv;
executed 7483893 times by 552 tests: return tv;
Executed by:
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  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • tst_QApplication
  • tst_QArrayData
  • ...
7483893
180}-
181-
182void qt_nanosleep(timespec amount)-
183{-
184 // We'd like to use clock_nanosleep.-
185 //-
186 // But clock_nanosleep is from POSIX.1-2001 and both are *not*-
187 // affected by clock changes when using relative sleeps, even for-
188 // CLOCK_REALTIME.-
189 //-
190 // nanosleep is POSIX.1-1993-
191-
192 int r;-
193 EINTR_LOOP(r, nanosleep(&amount, &amount));
executed 325375 times by 11 tests: end of block
Executed by:
  • tst_QDBusAbstractInterface
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  • tst_QSharedPointer
  • tst_QTcpServer
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  • tst_QThreadPool
r == -1Description
TRUEevaluated 1 time by 1 test
Evaluated by:
  • tst_QProcess
FALSEevaluated 325374 times by 11 tests
Evaluated by:
  • tst_QDBusAbstractInterface
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  • tst_QProgressDialog
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  • tst_QTcpServer
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(*__errno_location ()) == 4Description
TRUEevaluated 1 time by 1 test
Evaluated by:
  • tst_QProcess
FALSEnever evaluated
0-325375
194}
executed 325374 times by 11 tests: end of block
Executed by:
  • tst_QDBusAbstractInterface
  • tst_QFuture
  • tst_QLockFile
  • tst_QMutex
  • tst_QProcess
  • tst_QProgressDialog
  • tst_QReadWriteLock
  • tst_QSharedPointer
  • tst_QTcpServer
  • tst_QThread
  • tst_QThreadPool
325374
195-
196static qint64 elapsedAndRestart(qint64 sec, qint64 frac,-
197 qint64 *nowsec, qint64 *nowfrac)-
198{-
199 do_gettime(nowsec, nowfrac);-
200 sec = *nowsec - sec;-
201 frac = *nowfrac - frac;-
202 return (sec * Q_INT64_C(1000000000) + frac) / Q_INT64_C(1000000);
executed 16652 times by 507 tests: return (sec * static_cast<long long>(1000000000LL) + frac) / static_cast<long long>(1000000LL);
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
16652
203}-
204-
205void QElapsedTimer::start() Q_DECL_NOTHROW-
206{-
207 do_gettime(&t1, &t2);-
208}
executed 3238936 times by 522 tests: end of block
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
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  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
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  • tst_QAbstractSpinBox
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  • tst_QAccessibility
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  • ...
3238936
209-
210qint64 QElapsedTimer::restart() Q_DECL_NOTHROW-
211{-
212 return elapsedAndRestart(t1, t2, &t1, &t2);
executed 16652 times by 507 tests: return elapsedAndRestart(t1, t2, &t1, &t2);
Executed by:
  • tst_Collections
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  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
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  • tst_QAccessibility
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  • ...
16652
213}-
214-
215qint64 QElapsedTimer::nsecsElapsed() const Q_DECL_NOTHROW-
216{-
217 qint64 sec, frac;-
218 do_gettime(&sec, &frac);-
219 sec = sec - t1;-
220 frac = frac - t2;-
221 return sec * Q_INT64_C(1000000000) + frac;
executed 2689476 times by 517 tests: return sec * static_cast<long long>(1000000000LL) + frac;
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
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  • tst_QAlgorithms
  • ...
2689476
222}-
223-
224qint64 QElapsedTimer::elapsed() const Q_DECL_NOTHROW-
225{-
226 return nsecsElapsed() / Q_INT64_C(1000000);
executed 2685921 times by 241 tests: return nsecsElapsed() / static_cast<long long>(1000000LL);
Executed by:
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  • tst_NetworkSelfTest
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  • tst_QApplication
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  • tst_QBoxLayout
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  • tst_QCalendarWidget
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  • tst_QClipboard
  • tst_QColorDialog
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  • tst_QComboBox
  • ...
2685921
227}-
228-
229qint64 QElapsedTimer::msecsSinceReference() const Q_DECL_NOTHROW-
230{-
231 return t1 * Q_INT64_C(1000) + t2 / Q_INT64_C(1000000);
executed 6 times by 1 test: return t1 * static_cast<long long>(1000LL) + t2 / static_cast<long long>(1000000LL);
Executed by:
  • tst_QElapsedTimer
6
232}-
233-
234qint64 QElapsedTimer::msecsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW-
235{-
236 qint64 secs = other.t1 - t1;-
237 qint64 fraction = other.t2 - t2;-
238 return (secs * Q_INT64_C(1000000000) + fraction) / Q_INT64_C(1000000);
executed 6983 times by 8 tests: return (secs * static_cast<long long>(1000000000LL) + fraction) / static_cast<long long>(1000000LL);
Executed by:
  • tst_QCompleter
  • tst_QElapsedTimer
  • tst_QFileDialog2
  • tst_QFileSystemModel
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  • tst_QGraphicsProxyWidget
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  • tst_languageChange
6983
239}-
240-
241qint64 QElapsedTimer::secsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW-
242{-
243 return other.t1 - t1;
executed 1 time by 1 test: return other.t1 - t1;
Executed by:
  • tst_QElapsedTimer
1
244}-
245-
246bool operator<(const QElapsedTimer &v1, const QElapsedTimer &v2) Q_DECL_NOTHROW-
247{-
248 return v1.t1 < v2.t1 || (v1.t1 == v2.t1 && v1.t2 < v2.t2);
executed 2 times by 1 test: return v1.t1 < v2.t1 || (v1.t1 == v2.t1 && v1.t2 < v2.t2);
Executed by:
  • tst_QElapsedTimer
2
249}-
250-
251QT_END_NAMESPACE-
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