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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 450 insertions, 0 deletions

diff --git a/tests/auto/qsemaphore/tst_qsemaphore.cpp b/tests/auto/qsemaphore/tst_qsemaphore.cpp
new file mode 100644
index 0000000000..9fc6de138e
--- /dev/null
+++ b/tests/auto/qsemaphore/tst_qsemaphore.cpp
@@ -0,0 +1,450 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#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"