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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWidgets module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//! [0]
void executeOperation(int msecs)
{
QDeadlineTimer deadline(msecs);
do {
if (readFromDevice(deadline.remainingTime())
break;
waitForReadyRead(deadline);
} while (!deadline.hasExpired());
}
//! [0]
//! [1]
using namespace std::chrono;
using namespace std::chrono_literals;
QDeadlineTimer deadline(30s);
device->waitForReadyRead(deadline);
if (deadline.remainingTime<nanoseconds>() > 300ms)
cleanup();
//! [1]
//! [2]
using namespace std::chrono;
using namespace std::chrono_literals;
auto now = steady_clock::now();
QDeadlineTimer deadline(now + 1s);
Q_ASSERT(deadline == now + 1s);
//! [2]
//! [3]
using namespace std::chrono_literals;
QDeadlineTimer deadline(250ms);
//! [3]
//! [4]
using namespace std::chrono_literals;
deadline.setRemainingTime(250ms);
//! [4]
//! [5]
mutex.tryLock(deadline.remainingTime());
//! [5]
//! [6]
qint64 realTimeLeft = deadline.deadline();
if (realTimeLeft != (std::numeric_limits<qint64>::max)()) {
realTimeLeft -= QDeadlineTimer::current().deadline();
// or:
//QElapsedTimer timer;
//timer.start();
//realTimeLeft -= timer.msecsSinceReference();
}
//! [6]
//! [7]
qint64 realTimeLeft = deadline.deadlineNSecs();
if (realTimeLeft != std::numeric_limits<qint64>::max())
realTimeLeft -= QDeadlineTimer::current().deadlineNSecs();
//! [7]
//! [8]
return d1.deadlineNSecs() == d2.deadlineNSecs();
//! [8]
//! [9]
return d1.deadlineNSecs() != d2.deadlineNSecs();
//! [9]
//! [10]
return d1.deadlineNSecs() < d2.deadlineNSecs();
//! [10]
//! [11]
return d1.deadlineNSecs() <= d2.deadlineNSecs();
//! [11]
//! [12]
return d1.deadlineNSecs() > d2.deadlineNSecs();
//! [12]
//! [13]
return d1.deadlineNSecs() >= d2.deadlineNSecs();
//! [13]
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