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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of PySide2.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of The Qt Company Ltd nor the names of its
+** contributors may be used to endorse or promote products derived
+** from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <QtCore>
+
+void slowOperation1()
+{
+ static char buf[256];
+ for (int i = 0; i < (1<<20); ++i)
+ buf[i % sizeof buf] = i;
+}
+
+void slowOperation2(int) { slowOperation1(); }
+
+void startExample()
+{
+//![0]
+ timer = QElapsedTimer()
+ timer.start()
+
+ slowOperation1()
+
+ sys.stderr.write("The slow operation took" + timer.elapsed() + "milliseconds")
+//![0]
+}
+
+//![1]
+def executeSlowOperations(timeout):
+ timer = QElapsedTimer()
+ timer.start()
+ slowOperation1()
+
+ remainingTime = timeout - timer.elapsed()
+ if remainingTime > 0:
+ slowOperation2(remainingTime)
+//![1]
+
+//![2]
+def executeOperationsForTime(ms):
+ timer = QElapsedTimer()
+ timer.start()
+
+ while not timer.hasExpired(ms):
+ slowOperation1()
+//![2]
+
+int restartExample()
+{
+//![3]
+ timer = QElapsedTimer()
+
+ count = 1
+ timer.start()
+
+ while True:
+ count *= 2
+ slowOperation2(count)
+ if timer.restart() < 250:
+ break
+
+ return count
+//![3]
+}
+
+int main(int argc, char **argv)
+{
+ QCoreApplication app(argc, argv);
+
+ startExample();
+ restartExample();
+ executeSlowOperations(5);
+ executeOperationsForTime(5);
+}