qt5base-lts/tests/auto/qsemaphore/tst_qsemaphore.cpp

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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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****************************************************************************/
#include <QtTest/QtTest>
#include <qcoreapplication.h>
#include <qthread.h>
#include <qsemaphore.h>
//TESTED_CLASS=
//TESTED_FILES=
class tst_QSemaphore : public QObject
{
Q_OBJECT
public:
tst_QSemaphore();
~tst_QSemaphore();
private slots:
void acquire();
void tryAcquire();
void tryAcquireWithTimeout_data();
void tryAcquireWithTimeout();
void tryAcquireWithTimeoutStarvation();
void release();
void available();
void producerConsumer();
};
static QSemaphore *semaphore = 0;
tst_QSemaphore::tst_QSemaphore()
{ }
tst_QSemaphore::~tst_QSemaphore()
{ }
class ThreadOne : public QThread
{
public:
ThreadOne() {}
protected:
void run()
{
int i = 0;
while ( i < 100 ) {
semaphore->acquire();
i++;
semaphore->release();
}
}
};
class ThreadN : public QThread
{
int N;
public:
ThreadN(int n) :N(n) { }
protected:
void run()
{
int i = 0;
while ( i < 100 ) {
semaphore->acquire(N);
i++;
semaphore->release(N);
}
}
};
void tst_QSemaphore::acquire()
{
{
// old incrementOne() test
QVERIFY(!semaphore);
semaphore = new QSemaphore;
// make some "thing" available
semaphore->release();
ThreadOne t1;
ThreadOne t2;
t1.start();
t2.start();
QVERIFY(t1.wait(4000));
QVERIFY(t2.wait(4000));
delete semaphore;
semaphore = 0;
}
// old incrementN() test
{
QVERIFY(!semaphore);
semaphore = new QSemaphore;
// make 4 "things" available
semaphore->release(4);
ThreadN t1(2);
ThreadN t2(3);
t1.start();
t2.start();
QVERIFY(t1.wait(4000));
QVERIFY(t2.wait(4000));
delete semaphore;
semaphore = 0;
}
QSemaphore semaphore;
QCOMPARE(semaphore.available(), 0);
semaphore.release();
QCOMPARE(semaphore.available(), 1);
semaphore.release();
QCOMPARE(semaphore.available(), 2);
semaphore.release(10);
QCOMPARE(semaphore.available(), 12);
semaphore.release(10);
QCOMPARE(semaphore.available(), 22);
semaphore.acquire();
QCOMPARE(semaphore.available(), 21);
semaphore.acquire();
QCOMPARE(semaphore.available(), 20);
semaphore.acquire(10);
QCOMPARE(semaphore.available(), 10);
semaphore.acquire(10);
QCOMPARE(semaphore.available(), 0);
}
void tst_QSemaphore::tryAcquire()
{
QSemaphore semaphore;
QCOMPARE(semaphore.available(), 0);
semaphore.release();
QCOMPARE(semaphore.available(), 1);
QVERIFY(!semaphore.tryAcquire(2));
QCOMPARE(semaphore.available(), 1);
semaphore.release();
QCOMPARE(semaphore.available(), 2);
QVERIFY(!semaphore.tryAcquire(3));
QCOMPARE(semaphore.available(), 2);
semaphore.release(10);
QCOMPARE(semaphore.available(), 12);
QVERIFY(!semaphore.tryAcquire(100));
QCOMPARE(semaphore.available(), 12);
semaphore.release(10);
QCOMPARE(semaphore.available(), 22);
QVERIFY(!semaphore.tryAcquire(100));
QCOMPARE(semaphore.available(), 22);
QVERIFY(semaphore.tryAcquire());
QCOMPARE(semaphore.available(), 21);
QVERIFY(semaphore.tryAcquire());
QCOMPARE(semaphore.available(), 20);
QVERIFY(semaphore.tryAcquire(10));
QCOMPARE(semaphore.available(), 10);
QVERIFY(semaphore.tryAcquire(10));
QCOMPARE(semaphore.available(), 0);
// should not be able to acquire more
QVERIFY(!semaphore.tryAcquire());
QCOMPARE(semaphore.available(), 0);
QVERIFY(!semaphore.tryAcquire());
QCOMPARE(semaphore.available(), 0);
QVERIFY(!semaphore.tryAcquire(10));
QCOMPARE(semaphore.available(), 0);
QVERIFY(!semaphore.tryAcquire(10));
QCOMPARE(semaphore.available(), 0);
}
void tst_QSemaphore::tryAcquireWithTimeout_data()
{
QTest::addColumn<int>("timeout");
QTest::newRow("1s") << 1000;
QTest::newRow("10s") << 10000;
}
void tst_QSemaphore::tryAcquireWithTimeout()
{
QFETCH(int, timeout);
QSemaphore semaphore;
QTime time;
#define QVERIFYGE(a,b) {int e = a; if (a<b) qDebug() << #a << "=" << e << " !>= " << #b << "=" << b; QVERIFY(e>=b);}
#define QVERIFYLE(a,b) {int e = a; if (b<a) qDebug() << #a << "=" << e << " !<= " << #b << "=" << b; QVERIFY(e<=b);}
QCOMPARE(semaphore.available(), 0);
semaphore.release();
QCOMPARE(semaphore.available(), 1);
time.start();
QVERIFY(!semaphore.tryAcquire(2, timeout));
QVERIFYGE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 1);
semaphore.release();
QCOMPARE(semaphore.available(), 2);
time.start();
QVERIFY(!semaphore.tryAcquire(3, timeout));
QVERIFYGE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 2);
semaphore.release(10);
QCOMPARE(semaphore.available(), 12);
time.start();
QVERIFY(!semaphore.tryAcquire(100, timeout));
QVERIFYGE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 12);
semaphore.release(10);
QCOMPARE(semaphore.available(), 22);
time.start();
QVERIFY(!semaphore.tryAcquire(100, timeout));
QVERIFYGE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 22);
time.start();
QVERIFY(semaphore.tryAcquire(1, timeout));
QVERIFYLE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 21);
time.start();
QVERIFY(semaphore.tryAcquire(1, timeout));
QVERIFYLE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 20);
time.start();
QVERIFY(semaphore.tryAcquire(10, timeout));
QVERIFYLE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 10);
time.start();
QVERIFY(semaphore.tryAcquire(10, timeout));
QVERIFYLE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 0);
// should not be able to acquire more
time.start();
QVERIFY(!semaphore.tryAcquire(1, timeout));
QVERIFYGE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 0);
time.start();
QVERIFY(!semaphore.tryAcquire(1, timeout));
QVERIFYGE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 0);
time.start();
QVERIFY(!semaphore.tryAcquire(10, timeout));
QVERIFYGE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 0);
time.start();
QVERIFY(!semaphore.tryAcquire(10, timeout));
QVERIFYGE(time.elapsed(), timeout);
QCOMPARE(semaphore.available(), 0);
}
void tst_QSemaphore::tryAcquireWithTimeoutStarvation()
{
class Thread : public QThread
{
public:
QSemaphore startup;
QSemaphore *semaphore;
int amountToConsume, timeout;
void run()
{
startup.release();
forever {
if (!semaphore->tryAcquire(amountToConsume, timeout))
break;
semaphore->release(amountToConsume);
}
}
};
QSemaphore semaphore;
semaphore.release(1);
Thread consumer;
consumer.semaphore = &semaphore;
consumer.amountToConsume = 1;
consumer.timeout = 1000;
// start the thread and wait for it to start consuming
consumer.start();
consumer.startup.acquire();
// try to consume more than the thread we started is, and provide a longer
// timeout... we should timeout, not wait indefinitely
QVERIFY(!semaphore.tryAcquire(consumer.amountToConsume * 2, consumer.timeout * 2));
// the consumer should still be running
QVERIFY(consumer.isRunning() && !consumer.isFinished());
// acquire, and wait for smallConsumer to timeout
semaphore.acquire();
QVERIFY(consumer.wait());
}
void tst_QSemaphore::release()
{ DEPENDS_ON("acquire"); }
void tst_QSemaphore::available()
{ DEPENDS_ON("acquire"); }
const char alphabet[] = "ACGTH";
const int AlphabetSize = sizeof(alphabet) - 1;
const int BufferSize = 4096; // GCD of BufferSize and alphabet size must be 1
char buffer[BufferSize];
#ifndef Q_OS_WINCE
const int ProducerChunkSize = 3;
const int ConsumerChunkSize = 7;
const int Multiplier = 10;
#else
const int ProducerChunkSize = 2;
const int ConsumerChunkSize = 5;
const int Multiplier = 3;
#endif
// note: the code depends on the fact that DataSize is a multiple of
// ProducerChunkSize, ConsumerChunkSize, and BufferSize
const int DataSize = ProducerChunkSize * ConsumerChunkSize * BufferSize * Multiplier;
QSemaphore freeSpace(BufferSize);
QSemaphore usedSpace;
class Producer : public QThread
{
public:
void run();
};
void Producer::run()
{
for (int i = 0; i < DataSize; ++i) {
freeSpace.acquire();
buffer[i % BufferSize] = alphabet[i % AlphabetSize];
usedSpace.release();
}
for (int i = 0; i < DataSize; ++i) {
if ((i % ProducerChunkSize) == 0)
freeSpace.acquire(ProducerChunkSize);
buffer[i % BufferSize] = alphabet[i % AlphabetSize];
if ((i % ProducerChunkSize) == (ProducerChunkSize - 1))
usedSpace.release(ProducerChunkSize);
}
}
class Consumer : public QThread
{
public:
void run();
};
void Consumer::run()
{
for (int i = 0; i < DataSize; ++i) {
usedSpace.acquire();
QCOMPARE(buffer[i % BufferSize], alphabet[i % AlphabetSize]);
freeSpace.release();
}
for (int i = 0; i < DataSize; ++i) {
if ((i % ConsumerChunkSize) == 0)
usedSpace.acquire(ConsumerChunkSize);
QCOMPARE(buffer[i % BufferSize], alphabet[i % AlphabetSize]);
if ((i % ConsumerChunkSize) == (ConsumerChunkSize - 1))
freeSpace.release(ConsumerChunkSize);
}
}
void tst_QSemaphore::producerConsumer()
{
Producer producer;
Consumer consumer;
producer.start();
consumer.start();
producer.wait();
consumer.wait();
}
QTEST_MAIN(tst_QSemaphore)
#include "tst_qsemaphore.moc"