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Diffstat (limited to 'src/corelib/kernel/qelapsedtimer_generic.cpp')
-rw-r--r-- | src/corelib/kernel/qelapsedtimer_generic.cpp | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/src/corelib/kernel/qelapsedtimer_generic.cpp b/src/corelib/kernel/qelapsedtimer_generic.cpp deleted file mode 100644 index 874122f493..0000000000 --- a/src/corelib/kernel/qelapsedtimer_generic.cpp +++ /dev/null @@ -1,169 +0,0 @@ -// Copyright (C) 2016 The Qt Company Ltd. -// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only - -#include "qelapsedtimer.h" -#include "qdeadlinetimer.h" -#include "qdatetime.h" - -QT_BEGIN_NAMESPACE - -/*! - Returns the clock type that this QElapsedTimer implementation uses. - - \sa isMonotonic() -*/ -QElapsedTimer::ClockType QElapsedTimer::clockType() noexcept -{ - return SystemTime; -} - -/*! - Returns \c true if this is a monotonic clock, false otherwise. See the - information on the different clock types to understand which ones are - monotonic. - - \sa clockType(), QElapsedTimer::ClockType -*/ -bool QElapsedTimer::isMonotonic() noexcept -{ - return false; -} - -/*! - Starts this timer. Once started, a timer value can be checked with elapsed() or msecsSinceReference(). - - Normally, a timer is started just before a lengthy operation, such as: - \snippet qelapsedtimer/main.cpp 0 - - Also, starting a timer makes it valid again. - - \sa restart(), invalidate(), elapsed() -*/ -void QElapsedTimer::start() noexcept -{ - restart(); -} - -/*! - Restarts the timer and returns the number of milliseconds elapsed since - the previous start. - This function is equivalent to obtaining the elapsed time with elapsed() - and then starting the timer again with start(), but it does so in one - single operation, avoiding the need to obtain the clock value twice. - - Calling this function on a QElapsedTimer that is invalid - results in undefined behavior. - - The following example illustrates how to use this function to calibrate a - parameter to a slow operation (for example, an iteration count) so that - this operation takes at least 250 milliseconds: - - \snippet qelapsedtimer/main.cpp 3 - - \sa start(), invalidate(), elapsed(), isValid() -*/ -qint64 QElapsedTimer::restart() noexcept -{ - qint64 old = t1; - t1 = QDateTime::currentMSecsSinceEpoch(); - t2 = 0; - return t1 - old; -} - -/*! \since 4.8 - - Returns the number of nanoseconds since this QElapsedTimer was last - started. - - Calling this function on a QElapsedTimer that is invalid - results in undefined behavior. - - On platforms that do not provide nanosecond resolution, the value returned - will be the best estimate available. - - \sa start(), restart(), hasExpired(), invalidate() -*/ -qint64 QElapsedTimer::nsecsElapsed() const noexcept -{ - return elapsed() * 1000000; -} - -/*! - Returns the number of milliseconds since this QElapsedTimer was last - started. - - Calling this function on a QElapsedTimer that is invalid - results in undefined behavior. - - \sa start(), restart(), hasExpired(), isValid(), invalidate() -*/ -qint64 QElapsedTimer::elapsed() const noexcept -{ - return QDateTime::currentMSecsSinceEpoch() - t1; -} - -/*! - Returns the number of milliseconds between last time this QElapsedTimer - object was started and its reference clock's start. - - This number is usually arbitrary for all clocks except the - QElapsedTimer::SystemTime clock. For that clock type, this number is the - number of milliseconds since January 1st, 1970 at 0:00 UTC (that is, it - is the Unix time expressed in milliseconds). - - On Linux, Windows and Apple platforms, this value is usually the time - since the system boot, though it usually does not include the time the - system has spent in sleep states. - - \sa clockType(), elapsed() -*/ -qint64 QElapsedTimer::msecsSinceReference() const noexcept -{ - return t1; -} - -/*! - Returns the number of milliseconds between this QElapsedTimer and \a - other. If \a other was started before this object, the returned value - will be negative. If it was started later, the returned value will be - positive. - - The return value is undefined if this object or \a other were invalidated. - - \sa secsTo(), elapsed() -*/ -qint64 QElapsedTimer::msecsTo(const QElapsedTimer &other) const noexcept -{ - qint64 diff = other.t1 - t1; - return diff; -} - -/*! - Returns the number of seconds between this QElapsedTimer and \a other. If - \a other was started before this object, the returned value will be - negative. If it was started later, the returned value will be positive. - - Calling this function on or with a QElapsedTimer that is invalid - results in undefined behavior. - - \sa msecsTo(), elapsed() -*/ -qint64 QElapsedTimer::secsTo(const QElapsedTimer &other) const noexcept -{ - return msecsTo(other) / 1000; -} - -bool operator<(const QElapsedTimer &lhs, const QElapsedTimer &rhs) noexcept -{ - return lhs.t1 < rhs.t1; -} - -QDeadlineTimer QDeadlineTimer::current(Qt::TimerType timerType) noexcept -{ - QDeadlineTimer result; - result.t1 = QDateTime::currentMSecsSinceEpoch() * 1000 * 1000; - result.type = timerType; - return result; -} - -QT_END_NAMESPACE |