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| 1 | /**************************************************************************** | - |
| 2 | ** | - |
| 3 | ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). | - |
| 4 | ** Contact: http://www.qt-project.org/legal | - |
| 5 | ** | - |
| 6 | ** This file is part of the QtCore module of the Qt Toolkit. | - |
| 7 | ** | - |
| 8 | ** $QT_BEGIN_LICENSE:LGPL$ | - |
| 9 | ** Commercial License Usage | - |
| 10 | ** Licensees holding valid commercial Qt licenses may use this file in | - |
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| 12 | ** Software or, alternatively, in accordance with the terms contained in | - |
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| 15 | ** use the contact form at http://qt.digia.com/contact-us. | - |
| 16 | ** | - |
| 17 | ** GNU Lesser General Public License Usage | - |
| 18 | ** Alternatively, this file may be used under the terms of the GNU Lesser | - |
| 19 | ** General Public License version 2.1 as published by the Free Software | - |
| 20 | ** Foundation and appearing in the file LICENSE.LGPL included in the | - |
| 21 | ** packaging of this file. Please review the following information to | - |
| 22 | ** ensure the GNU Lesser General Public License version 2.1 requirements | - |
| 23 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. | - |
| 24 | ** | - |
| 25 | ** In addition, as a special exception, Digia gives you certain additional | - |
| 26 | ** rights. These rights are described in the Digia Qt LGPL Exception | - |
| 27 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. | - |
| 28 | ** | - |
| 29 | ** GNU General Public License Usage | - |
| 30 | ** Alternatively, this file may be used under the terms of the GNU | - |
| 31 | ** General Public License version 3.0 as published by the Free Software | - |
| 32 | ** Foundation and appearing in the file LICENSE.GPL included in the | - |
| 33 | ** packaging of this file. Please review the following information to | - |
| 34 | ** ensure the GNU General Public License version 3.0 requirements will be | - |
| 35 | ** met: http://www.gnu.org/copyleft/gpl.html. | - |
| 36 | ** | - |
| 37 | ** | - |
| 38 | ** $QT_END_LICENSE$ | - |
| 39 | ** | - |
| 40 | ****************************************************************************/ | - |
| 41 | | - |
| 42 | // ask for the latest POSIX, just in case | - |
| 43 | #define _POSIX_C_SOURCE 200809L | - |
| 44 | | - |
| 45 | #include "qelapsedtimer.h" | - |
| 46 | #include <sys/time.h> | - |
| 47 | #include <time.h> | - |
| 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 | | - |
| 61 | QT_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 | #ifndef CLOCK_REALTIME | - |
| 92 | # define CLOCK_REALTIME 0 | - |
| 93 | static 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 | - |
| 107 | static inline void qt_clock_gettime(clockid_t clock, struct timespec *ts) | - |
| 108 | { | - |
| 109 | clock_gettime(clock, ts); executed (the execution status of this line is deduced): clock_gettime(clock, ts); | - |
| 110 | } executed: }Execution Count:7883884 | 7883884 |
| 111 | #endif | - |
| 112 | | - |
| 113 | static int unixCheckClockType() | - |
| 114 | { | - |
| 115 | #if (_POSIX_MONOTONIC_CLOCK-0 == 0) && defined(_SC_MONOTONIC_CLOCK) | - |
| 116 | // we need a value we can store in a clockid_t that isn't a valid clock | - |
| 117 | // check if the valid ones are both non-negative or both non-positive | - |
| 118 | # if CLOCK_MONOTONIC >= 0 && CLOCK_REALTIME >= 0 | - |
| 119 | # define IS_VALID_CLOCK(clock) (clock >= 0) | - |
| 120 | # define INVALID_CLOCK -1 | - |
| 121 | # elif CLOCK_MONOTONIC <= 0 && CLOCK_REALTIME <= 0 | - |
| 122 | # define IS_VALID_CLOCK(clock) (clock <= 0) | - |
| 123 | # define INVALID_CLOCK 1 | - |
| 124 | # else | - |
| 125 | # error "Sorry, your system has weird values for CLOCK_MONOTONIC and CLOCK_REALTIME" | - |
| 126 | # endif | - |
| 127 | | - |
| 128 | static QBasicAtomicInt clockToUse = Q_BASIC_ATOMIC_INITIALIZER(INVALID_CLOCK); | - |
| 129 | int clock = clockToUse.loadAcquire(); executed (the execution status of this line is deduced): int clock = clockToUse.loadAcquire(); | - |
| 130 | if (Q_LIKELY(IS_VALID_CLOCK(clock))) evaluated: __builtin_expect(!!((clock >= 0)), true)| yes Evaluation Count:10264550 | yes Evaluation Count:8 |
| 8-10264550 |
| 131 | return clock; executed: return clock;Execution Count:10266141 | 10266141 |
| 132 | | - |
| 133 | // detect if the system supports monotonic timers | - |
| 134 | clock = sysconf(_SC_MONOTONIC_CLOCK) > 0 ? CLOCK_MONOTONIC : CLOCK_REALTIME; partially evaluated: sysconf(_SC_MONOTONIC_CLOCK) > 0| yes Evaluation Count:8 | no Evaluation Count:0 |
| 0-8 |
| 135 | clockToUse.storeRelease(clock); executed (the execution status of this line is deduced): clockToUse.storeRelease(clock); | - |
| 136 | return clock; executed: return clock;Execution Count:8 | 8 |
| 137 | | - |
| 138 | # undef INVALID_CLOCK | - |
| 139 | # undef IS_VALID_CLOCK | - |
| 140 | #elif (_POSIX_MONOTONIC_CLOCK-0) > 0 | - |
| 141 | return CLOCK_MONOTONIC; | - |
| 142 | #else | - |
| 143 | return CLOCK_REALTIME; | - |
| 144 | #endif | - |
| 145 | } | - |
| 146 | | - |
| 147 | static inline qint64 fractionAdjustment() | - |
| 148 | { | - |
| 149 | return 1000*1000ull; executed: return 1000*1000ull;Execution Count:2437196 | 2437196 |
| 150 | } | - |
| 151 | | - |
| 152 | bool QElapsedTimer::isMonotonic() Q_DECL_NOTHROW | - |
| 153 | { | - |
| 154 | return clockType() == MonotonicClock; executed: return clockType() == MonotonicClock;Execution Count:2385222 | 2385222 |
| 155 | } | - |
| 156 | | - |
| 157 | QElapsedTimer::ClockType QElapsedTimer::clockType() Q_DECL_NOTHROW | - |
| 158 | { | - |
| 159 | return unixCheckClockType() == CLOCK_REALTIME ? SystemTime : MonotonicClock; executed: return unixCheckClockType() == 0 ? SystemTime : MonotonicClock;Execution Count:2385280 | 2385280 |
| 160 | } | - |
| 161 | | - |
| 162 | static inline void do_gettime(qint64 *sec, qint64 *frac) | - |
| 163 | { | - |
| 164 | timespec ts; executed (the execution status of this line is deduced): timespec ts; | - |
| 165 | qt_clock_gettime(unixCheckClockType(), &ts); executed (the execution status of this line is deduced): qt_clock_gettime(unixCheckClockType(), &ts); | - |
| 166 | *sec = ts.tv_sec; executed (the execution status of this line is deduced): *sec = ts.tv_sec; | - |
| 167 | *frac = ts.tv_nsec; executed (the execution status of this line is deduced): *frac = ts.tv_nsec; | - |
| 168 | } executed: }Execution Count:7883993 | 7883993 |
| 169 | | - |
| 170 | // used in qcore_unix.cpp and qeventdispatcher_unix.cpp | - |
| 171 | timeval qt_gettime() Q_DECL_NOTHROW | - |
| 172 | { | - |
| 173 | qint64 sec, frac; executed (the execution status of this line is deduced): qint64 sec, frac; | - |
| 174 | do_gettime(&sec, &frac); executed (the execution status of this line is deduced): do_gettime(&sec, &frac); | - |
| 175 | | - |
| 176 | timeval tv; executed (the execution status of this line is deduced): timeval tv; | - |
| 177 | tv.tv_sec = sec; executed (the execution status of this line is deduced): tv.tv_sec = sec; | - |
| 178 | tv.tv_usec = frac / 1000; executed (the execution status of this line is deduced): tv.tv_usec = frac / 1000; | - |
| 179 | | - |
| 180 | return tv; executed: return tv;Execution Count:1123443 | 1123443 |
| 181 | } | - |
| 182 | | - |
| 183 | void qt_nanosleep(timespec amount) | - |
| 184 | { | - |
| 185 | // We'd like to use clock_nanosleep. | - |
| 186 | // | - |
| 187 | // But clock_nanosleep is from POSIX.1-2001 and both are *not* | - |
| 188 | // affected by clock changes when using relative sleeps, even for | - |
| 189 | // CLOCK_REALTIME. | - |
| 190 | // | - |
| 191 | // nanosleep is POSIX.1-1993 | - |
| 192 | | - |
| 193 | int r; executed (the execution status of this line is deduced): int r; | - |
| 194 | EINTR_LOOP(r, nanosleep(&amount, &amount)); executed: }Execution Count:414261 partially evaluated: r == -1| no Evaluation Count:0 | yes Evaluation Count:414252 |
never evaluated: (*__errno_location ()) == 4 | 0-414261 |
| 195 | } executed: }Execution Count:414247 | 414247 |
| 196 | | - |
| 197 | static qint64 elapsedAndRestart(qint64 sec, qint64 frac, | - |
| 198 | qint64 *nowsec, qint64 *nowfrac) | - |
| 199 | { | - |
| 200 | do_gettime(nowsec, nowfrac); executed (the execution status of this line is deduced): do_gettime(nowsec, nowfrac); | - |
| 201 | sec = *nowsec - sec; executed (the execution status of this line is deduced): sec = *nowsec - sec; | - |
| 202 | frac = *nowfrac - frac; executed (the execution status of this line is deduced): frac = *nowfrac - frac; | - |
| 203 | return sec * Q_INT64_C(1000) + frac / fractionAdjustment(); executed: return sec * static_cast<long long>(1000LL) + frac / fractionAdjustment();Execution Count:2386771 | 2386771 |
| 204 | } | - |
| 205 | | - |
| 206 | void QElapsedTimer::start() Q_DECL_NOTHROW | - |
| 207 | { | - |
| 208 | do_gettime(&t1, &t2); executed (the execution status of this line is deduced): do_gettime(&t1, &t2); | - |
| 209 | } executed: }Execution Count:4373639 | 4373639 |
| 210 | | - |
| 211 | qint64 QElapsedTimer::restart() Q_DECL_NOTHROW | - |
| 212 | { | - |
| 213 | return elapsedAndRestart(t1, t2, &t1, &t2); executed: return elapsedAndRestart(t1, t2, &t1, &t2);Execution Count:916 | 916 |
| 214 | } | - |
| 215 | | - |
| 216 | qint64 QElapsedTimer::nsecsElapsed() const Q_DECL_NOTHROW | - |
| 217 | { | - |
| 218 | qint64 sec, frac; executed (the execution status of this line is deduced): qint64 sec, frac; | - |
| 219 | do_gettime(&sec, &frac); executed (the execution status of this line is deduced): do_gettime(&sec, &frac); | - |
| 220 | sec = sec - t1; executed (the execution status of this line is deduced): sec = sec - t1; | - |
| 221 | frac = frac - t2; executed (the execution status of this line is deduced): frac = frac - t2; | - |
| 222 | return sec * Q_INT64_C(1000000000) + frac; executed: return sec * static_cast<long long>(1000000000LL) + frac;Execution Count:295 | 295 |
| 223 | } | - |
| 224 | | - |
| 225 | qint64 QElapsedTimer::elapsed() const Q_DECL_NOTHROW | - |
| 226 | { | - |
| 227 | qint64 sec, frac; executed (the execution status of this line is deduced): qint64 sec, frac; | - |
| 228 | return elapsedAndRestart(t1, t2, &sec, &frac); executed: return elapsedAndRestart(t1, t2, &sec, &frac);Execution Count:2374730 | 2374730 |
| 229 | } | - |
| 230 | | - |
| 231 | qint64 QElapsedTimer::msecsSinceReference() const Q_DECL_NOTHROW | - |
| 232 | { | - |
| 233 | return t1 * Q_INT64_C(1000) + t2 / fractionAdjustment(); executed: return t1 * static_cast<long long>(1000LL) + t2 / fractionAdjustment();Execution Count:4 | 4 |
| 234 | } | - |
| 235 | | - |
| 236 | qint64 QElapsedTimer::msecsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW | - |
| 237 | { | - |
| 238 | qint64 secs = other.t1 - t1; executed (the execution status of this line is deduced): qint64 secs = other.t1 - t1; | - |
| 239 | qint64 fraction = other.t2 - t2; executed (the execution status of this line is deduced): qint64 fraction = other.t2 - t2; | - |
| 240 | return secs * Q_INT64_C(1000) + fraction / fractionAdjustment(); executed: return secs * static_cast<long long>(1000LL) + fraction / fractionAdjustment();Execution Count:50300 | 50300 |
| 241 | } | - |
| 242 | | - |
| 243 | qint64 QElapsedTimer::secsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW | - |
| 244 | { | - |
| 245 | return other.t1 - t1; executed: return other.t1 - t1;Execution Count:1 | 1 |
| 246 | } | - |
| 247 | | - |
| 248 | bool operator<(const QElapsedTimer &v1, const QElapsedTimer &v2) Q_DECL_NOTHROW | - |
| 249 | { | - |
| 250 | return v1.t1 < v2.t1 || (v1.t1 == v2.t1 && v1.t2 < v2.t2); executed: return v1.t1 < v2.t1 || (v1.t1 == v2.t1 && v1.t2 < v2.t2);Execution Count:2 | 2 |
| 251 | } | - |
| 252 | | - |
| 253 | QT_END_NAMESPACE | - |
| 254 | | - |
| | |