qt5base-lts/tests/auto/qwaitcondition/tst_qwaitcondition.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.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
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** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
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**
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** $QT_END_LICENSE$
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****************************************************************************/
#include <QtTest/QtTest>
#include <qcoreapplication.h>
#include <qmutex.h>
#include <qthread.h>
#include <qwaitcondition.h>
#if defined(Q_OS_SYMBIAN)
// Symbian Open C has a bug that causes very short waits to fail sometimes
#define COND_WAIT_TIME 50
#else
#define COND_WAIT_TIME 1
#endif
//TESTED_CLASS=
//TESTED_FILES=
class tst_QWaitCondition : public QObject
{
Q_OBJECT
public:
tst_QWaitCondition();
private slots:
void wait_QMutex();
void wait_QReadWriteLock();
void wakeOne();
void wakeAll();
void wait_RaceCondition();
};
static const int iterations = 10;
// Note: some tests rely on ThreadCount being multiple of 2
#if defined(Q_OS_SOLARIS) || ( defined(Q_OS_LINUX) && defined(QT_ARCH_ARMV6) )
static const int ThreadCount = 4;
#else
static const int ThreadCount = 10;
#endif
tst_QWaitCondition::tst_QWaitCondition()
{
}
class wait_QMutex_Thread_1 : public QThread
{
public:
QMutex mutex;
QWaitCondition cond;
inline wait_QMutex_Thread_1()
{ }
void run()
{
mutex.lock();
cond.wakeOne();
cond.wait(&mutex);
mutex.unlock();
}
};
class wait_QMutex_Thread_2 : public QThread
{
public:
QWaitCondition started;
QMutex *mutex;
QWaitCondition *cond;
inline wait_QMutex_Thread_2()
: mutex(0), cond(0)
{ }
void run()
{
mutex->lock();
started.wakeOne();
cond->wait(mutex);
mutex->unlock();
}
};
class wait_QReadWriteLock_Thread_1 : public QThread
{
public:
QReadWriteLock readWriteLock;
QWaitCondition cond;
inline wait_QReadWriteLock_Thread_1()
{ }
void run()
{
readWriteLock.lockForWrite();
cond.wakeOne();
cond.wait(&readWriteLock);
readWriteLock.unlock();
}
};
class wait_QReadWriteLock_Thread_2 : public QThread
{
public:
QWaitCondition started;
QReadWriteLock *readWriteLock;
QWaitCondition *cond;
inline wait_QReadWriteLock_Thread_2()
: readWriteLock(0), cond(0)
{ }
void run()
{
readWriteLock->lockForRead();
started.wakeOne();
cond->wait(readWriteLock);
readWriteLock->unlock();
}
};
void tst_QWaitCondition::wait_QMutex()
{
int x;
for (int i = 0; i < iterations; ++i) {
{
QMutex mutex;
QWaitCondition cond;
mutex.lock();
cond.wakeOne();
QVERIFY(!cond.wait(&mutex, 1));
cond.wakeAll();
QVERIFY(!cond.wait(&mutex, 1));
mutex.unlock();
}
{
// test multiple threads waiting on separate wait conditions
wait_QMutex_Thread_1 thread[ThreadCount];
for (x = 0; x < ThreadCount; ++x) {
thread[x].mutex.lock();
thread[x].start();
// wait for thread to start
QVERIFY(thread[x].cond.wait(&thread[x].mutex, 1000));
thread[x].mutex.unlock();
}
for (x = 0; x < ThreadCount; ++x) {
QVERIFY(thread[x].isRunning());
QVERIFY(!thread[x].isFinished());
}
for (x = 0; x < ThreadCount; ++x) {
thread[x].mutex.lock();
thread[x].cond.wakeOne();
thread[x].mutex.unlock();
}
for (x = 0; x < ThreadCount; ++x) {
QVERIFY(thread[x].wait(1000));
}
}
{
// test multiple threads waiting on a wait condition
QMutex mutex;
QWaitCondition cond1, cond2;
wait_QMutex_Thread_2 thread[ThreadCount];
mutex.lock();
for (x = 0; x < ThreadCount; ++x) {
thread[x].mutex = &mutex;
thread[x].cond = (x < ThreadCount / 2) ? &cond1 : &cond2;
thread[x].start();
// wait for thread to start
QVERIFY(thread[x].started.wait(&mutex, 1000));
}
mutex.unlock();
for (x = 0; x < ThreadCount; ++x) {
QVERIFY(thread[x].isRunning());
QVERIFY(!thread[x].isFinished());
}
mutex.lock();
cond1.wakeAll();
cond2.wakeAll();
mutex.unlock();
for (x = 0; x < ThreadCount; ++x) {
QVERIFY(thread[x].wait(1000));
}
}
}
}
void tst_QWaitCondition::wait_QReadWriteLock()
{
{
QReadWriteLock readWriteLock(QReadWriteLock::Recursive);
QWaitCondition waitCondition;
// ensure that the lockForRead is correctly restored
readWriteLock.lockForRead();
QVERIFY(!waitCondition.wait(&readWriteLock, 1));
QVERIFY(!readWriteLock.tryLockForWrite());
QVERIFY(readWriteLock.tryLockForRead());
readWriteLock.unlock();
QVERIFY(!readWriteLock.tryLockForWrite());
readWriteLock.unlock();
QVERIFY(readWriteLock.tryLockForWrite());
readWriteLock.unlock();
}
{
QReadWriteLock readWriteLock(QReadWriteLock::Recursive);
QWaitCondition waitCondition;
// ensure that the lockForWrite is correctly restored
readWriteLock.lockForWrite();
QVERIFY(!waitCondition.wait(&readWriteLock, 1));
QVERIFY(!readWriteLock.tryLockForRead());
QVERIFY(readWriteLock.tryLockForWrite());
readWriteLock.unlock();
QVERIFY(!readWriteLock.tryLockForRead());
readWriteLock.unlock();
QVERIFY(readWriteLock.tryLockForRead());
readWriteLock.unlock();
}
int x;
for (int i = 0; i < iterations; ++i) {
{
QReadWriteLock readWriteLock;
QWaitCondition waitCondition;
readWriteLock.lockForRead();
waitCondition.wakeOne();
QVERIFY(!waitCondition.wait(&readWriteLock, 1));
waitCondition.wakeAll();
QVERIFY(!waitCondition.wait(&readWriteLock, 1));
readWriteLock.unlock();
}
{
QReadWriteLock readWriteLock;
QWaitCondition waitCondition;
readWriteLock.lockForWrite();
waitCondition.wakeOne();
QVERIFY(!waitCondition.wait(&readWriteLock, 1));
waitCondition.wakeAll();
QVERIFY(!waitCondition.wait(&readWriteLock, 1));
readWriteLock.unlock();
}
{
// test multiple threads waiting on separate wait conditions
wait_QReadWriteLock_Thread_1 thread[ThreadCount];
for (x = 0; x < ThreadCount; ++x) {
thread[x].readWriteLock.lockForRead();
thread[x].start();
// wait for thread to start
#if defined(Q_OS_SYMBIAN) && defined(Q_CC_WINSCW)
// Symbian emulator startup simultaneously with this thread causes additional delay
QVERIFY(thread[x].cond.wait(&thread[x].readWriteLock, 10000));
#else
QVERIFY(thread[x].cond.wait(&thread[x].readWriteLock, 1000));
#endif
thread[x].readWriteLock.unlock();
}
for (x = 0; x < ThreadCount; ++x) {
QVERIFY(thread[x].isRunning());
QVERIFY(!thread[x].isFinished());
}
for (x = 0; x < ThreadCount; ++x) {
thread[x].readWriteLock.lockForRead();
thread[x].cond.wakeOne();
thread[x].readWriteLock.unlock();
}
for (x = 0; x < ThreadCount; ++x) {
QVERIFY(thread[x].wait(1000));
}
}
{
// test multiple threads waiting on a wait condition
QReadWriteLock readWriteLock;
QWaitCondition cond1, cond2;
wait_QReadWriteLock_Thread_2 thread[ThreadCount];
readWriteLock.lockForWrite();
for (x = 0; x < ThreadCount; ++x) {
thread[x].readWriteLock = &readWriteLock;
thread[x].cond = (x < ThreadCount / 2) ? &cond1 : &cond2;
thread[x].start();
// wait for thread to start
QVERIFY(thread[x].started.wait(&readWriteLock, 1000));
}
readWriteLock.unlock();
for (x = 0; x < ThreadCount; ++x) {
QVERIFY(thread[x].isRunning());
QVERIFY(!thread[x].isFinished());
}
readWriteLock.lockForWrite();
cond1.wakeAll();
cond2.wakeAll();
readWriteLock.unlock();
for (x = 0; x < ThreadCount; ++x) {
QVERIFY(thread[x].wait(1000));
}
}
}
}
class wake_Thread : public QThread
{
public:
static int count;
QWaitCondition started;
QWaitCondition dummy;
QMutex *mutex;
QWaitCondition *cond;
inline wake_Thread()
: mutex(0), cond(0)
{ }
static inline void sleep(ulong s)
{ QThread::sleep(s); }
void run()
{
mutex->lock();
++count;
dummy.wakeOne(); // this wakeup should be lost
started.wakeOne();
dummy.wakeAll(); // this one too
cond->wait(mutex);
--count;
mutex->unlock();
}
};
int wake_Thread::count = 0;
class wake_Thread_2 : public QThread
{
public:
static int count;
QWaitCondition started;
QWaitCondition dummy;
QReadWriteLock *readWriteLock;
QWaitCondition *cond;
inline wake_Thread_2()
: readWriteLock(0), cond(0)
{ }
static inline void sleep(ulong s)
{ QThread::sleep(s); }
void run()
{
readWriteLock->lockForWrite();
++count;
dummy.wakeOne(); // this wakeup should be lost
started.wakeOne();
dummy.wakeAll(); // this one too
cond->wait(readWriteLock);
--count;
readWriteLock->unlock();
}
};
int wake_Thread_2::count = 0;
void tst_QWaitCondition::wakeOne()
{
int x;
// wake up threads, one at a time
for (int i = 0; i < iterations; ++i) {
QMutex mutex;
QWaitCondition cond;
// QMutex
wake_Thread thread[ThreadCount];
bool thread_exited[ThreadCount];
mutex.lock();
for (x = 0; x < ThreadCount; ++x) {
thread[x].mutex = &mutex;
thread[x].cond = &cond;
thread_exited[x] = FALSE;
thread[x].start();
// wait for thread to start
QVERIFY(thread[x].started.wait(&mutex, 1000));
// make sure wakeups are not queued... if nothing is
// waiting at the time of the wakeup, nothing happens
QVERIFY(!thread[x].dummy.wait(&mutex, 1));
}
mutex.unlock();
QCOMPARE(wake_Thread::count, ThreadCount);
// wake up threads one at a time
for (x = 0; x < ThreadCount; ++x) {
mutex.lock();
cond.wakeOne();
QVERIFY(!cond.wait(&mutex, COND_WAIT_TIME));
QVERIFY(!thread[x].dummy.wait(&mutex, 1));
mutex.unlock();
int exited = 0;
for (int y = 0; y < ThreadCount; ++y) {
if (thread_exited[y])
continue;
if (thread[y].wait(exited > 0 ? 10 : 1000)) {
thread_exited[y] = TRUE;
++exited;
}
}
QCOMPARE(exited, 1);
QCOMPARE(wake_Thread::count, ThreadCount - (x + 1));
}
QCOMPARE(wake_Thread::count, 0);
// QReadWriteLock
QReadWriteLock readWriteLock;
wake_Thread_2 rwthread[ThreadCount];
readWriteLock.lockForWrite();
for (x = 0; x < ThreadCount; ++x) {
rwthread[x].readWriteLock = &readWriteLock;
rwthread[x].cond = &cond;
thread_exited[x] = FALSE;
rwthread[x].start();
// wait for thread to start
QVERIFY(rwthread[x].started.wait(&readWriteLock, 1000));
// make sure wakeups are not queued... if nothing is
// waiting at the time of the wakeup, nothing happens
QVERIFY(!rwthread[x].dummy.wait(&readWriteLock, 1));
}
readWriteLock.unlock();
QCOMPARE(wake_Thread_2::count, ThreadCount);
// wake up threads one at a time
for (x = 0; x < ThreadCount; ++x) {
readWriteLock.lockForWrite();
cond.wakeOne();
QVERIFY(!cond.wait(&readWriteLock, COND_WAIT_TIME));
QVERIFY(!rwthread[x].dummy.wait(&readWriteLock, 1));
readWriteLock.unlock();
int exited = 0;
for (int y = 0; y < ThreadCount; ++y) {
if (thread_exited[y])
continue;
if (rwthread[y].wait(exited > 0 ? 10 : 1000)) {
thread_exited[y] = TRUE;
++exited;
}
}
QCOMPARE(exited, 1);
QCOMPARE(wake_Thread_2::count, ThreadCount - (x + 1));
}
QCOMPARE(wake_Thread_2::count, 0);
}
// wake up threads, two at a time
for (int i = 0; i < iterations; ++i) {
QMutex mutex;
QWaitCondition cond;
// QMutex
wake_Thread thread[ThreadCount];
bool thread_exited[ThreadCount];
mutex.lock();
for (x = 0; x < ThreadCount; ++x) {
thread[x].mutex = &mutex;
thread[x].cond = &cond;
thread_exited[x] = FALSE;
thread[x].start();
// wait for thread to start
QVERIFY(thread[x].started.wait(&mutex, 1000));
// make sure wakeups are not queued... if nothing is
// waiting at the time of the wakeup, nothing happens
QVERIFY(!thread[x].dummy.wait(&mutex, 1));
}
mutex.unlock();
QCOMPARE(wake_Thread::count, ThreadCount);
// wake up threads one at a time
for (x = 0; x < ThreadCount; x += 2) {
mutex.lock();
cond.wakeOne();
cond.wakeOne();
QVERIFY(!cond.wait(&mutex, COND_WAIT_TIME));
QVERIFY(!thread[x].dummy.wait(&mutex, 1));
QVERIFY(!thread[x + 1].dummy.wait(&mutex, 1));
mutex.unlock();
int exited = 0;
for (int y = 0; y < ThreadCount; ++y) {
if (thread_exited[y])
continue;
if (thread[y].wait(exited > 0 ? 10 : 1000)) {
thread_exited[y] = TRUE;
++exited;
}
}
QCOMPARE(exited, 2);
QCOMPARE(wake_Thread::count, ThreadCount - (x + 2));
}
QCOMPARE(wake_Thread::count, 0);
// QReadWriteLock
QReadWriteLock readWriteLock;
wake_Thread_2 rwthread[ThreadCount];
readWriteLock.lockForWrite();
for (x = 0; x < ThreadCount; ++x) {
rwthread[x].readWriteLock = &readWriteLock;
rwthread[x].cond = &cond;
thread_exited[x] = FALSE;
rwthread[x].start();
// wait for thread to start
QVERIFY(rwthread[x].started.wait(&readWriteLock, 1000));
// make sure wakeups are not queued... if nothing is
// waiting at the time of the wakeup, nothing happens
QVERIFY(!rwthread[x].dummy.wait(&readWriteLock, 1));
}
readWriteLock.unlock();
QCOMPARE(wake_Thread_2::count, ThreadCount);
// wake up threads one at a time
for (x = 0; x < ThreadCount; x += 2) {
readWriteLock.lockForWrite();
cond.wakeOne();
cond.wakeOne();
QVERIFY(!cond.wait(&readWriteLock, COND_WAIT_TIME));
QVERIFY(!rwthread[x].dummy.wait(&readWriteLock, 1));
QVERIFY(!rwthread[x + 1].dummy.wait(&readWriteLock, 1));
readWriteLock.unlock();
int exited = 0;
for (int y = 0; y < ThreadCount; ++y) {
if (thread_exited[y])
continue;
if (rwthread[y].wait(exited > 0 ? 10 : 1000)) {
thread_exited[y] = TRUE;
++exited;
}
}
QCOMPARE(exited, 2);
QCOMPARE(wake_Thread_2::count, ThreadCount - (x + 2));
}
QCOMPARE(wake_Thread_2::count, 0);
}
}
void tst_QWaitCondition::wakeAll()
{
int x;
for (int i = 0; i < iterations; ++i) {
QMutex mutex;
QWaitCondition cond;
// QMutex
wake_Thread thread[ThreadCount];
mutex.lock();
for (x = 0; x < ThreadCount; ++x) {
thread[x].mutex = &mutex;
thread[x].cond = &cond;
thread[x].start();
// wait for thread to start
QVERIFY(thread[x].started.wait(&mutex, 1000));
}
mutex.unlock();
QCOMPARE(wake_Thread::count, ThreadCount);
// wake up all threads at once
mutex.lock();
cond.wakeAll();
QVERIFY(!cond.wait(&mutex, COND_WAIT_TIME));
mutex.unlock();
int exited = 0;
for (x = 0; x < ThreadCount; ++x) {
if (thread[x].wait(1000))
++exited;
}
QCOMPARE(exited, ThreadCount);
QCOMPARE(wake_Thread::count, 0);
// QReadWriteLock
QReadWriteLock readWriteLock;
wake_Thread_2 rwthread[ThreadCount];
readWriteLock.lockForWrite();
for (x = 0; x < ThreadCount; ++x) {
rwthread[x].readWriteLock = &readWriteLock;
rwthread[x].cond = &cond;
rwthread[x].start();
// wait for thread to start
QVERIFY(rwthread[x].started.wait(&readWriteLock, 1000));
}
readWriteLock.unlock();
QCOMPARE(wake_Thread_2::count, ThreadCount);
// wake up all threads at once
readWriteLock.lockForWrite();
cond.wakeAll();
QVERIFY(!cond.wait(&readWriteLock, COND_WAIT_TIME));
readWriteLock.unlock();
exited = 0;
for (x = 0; x < ThreadCount; ++x) {
if (rwthread[x].wait(1000))
++exited;
}
QCOMPARE(exited, ThreadCount);
QCOMPARE(wake_Thread_2::count, 0);
}
}
class wait_RaceConditionThread : public QThread
{
public:
wait_RaceConditionThread(QMutex *mutex, QWaitCondition *startup, QWaitCondition *waitCondition,
ulong timeout = ULONG_MAX)
: timeout(timeout), returnValue(false), ready(false),
mutex(mutex), startup(startup), waitCondition(waitCondition) {}
unsigned long timeout;
bool returnValue;
bool ready;
QMutex *mutex;
QWaitCondition *startup;
QWaitCondition *waitCondition;
void run() {
mutex->lock();
ready = true;
startup->wakeOne();
returnValue = waitCondition->wait(mutex, timeout);
mutex->unlock();
}
};
class wait_RaceConditionThread_2 : public QThread
{
public:
wait_RaceConditionThread_2(QReadWriteLock *readWriteLock,
QWaitCondition *startup,
QWaitCondition *waitCondition,
ulong timeout = ULONG_MAX)
: timeout(timeout), returnValue(false), ready(false),
readWriteLock(readWriteLock), startup(startup), waitCondition(waitCondition)
{ }
unsigned long timeout;
bool returnValue;
bool ready;
QReadWriteLock *readWriteLock;
QWaitCondition *startup;
QWaitCondition *waitCondition;
void run() {
readWriteLock->lockForWrite();
ready = true;
startup->wakeOne();
returnValue = waitCondition->wait(readWriteLock, timeout);
readWriteLock->unlock();
}
};
void tst_QWaitCondition::wait_RaceCondition()
{
{
QMutex mutex;
QWaitCondition startup;
QWaitCondition waitCondition;
wait_RaceConditionThread timeoutThread(&mutex, &startup, &waitCondition, 1000),
waitingThread1(&mutex, &startup, &waitCondition);
timeoutThread.start();
waitingThread1.start();
mutex.lock();
// wait for the threads to start up
while (!timeoutThread.ready
|| !waitingThread1.ready) {
startup.wait(&mutex);
}
QTest::qWait(2000);
waitCondition.wakeOne();
mutex.unlock();
QVERIFY(timeoutThread.wait(5000));
QVERIFY(!timeoutThread.returnValue);
QVERIFY(waitingThread1.wait(5000));
QVERIFY(waitingThread1.returnValue);
}
{
QReadWriteLock readWriteLock;
QWaitCondition startup;
QWaitCondition waitCondition;
wait_RaceConditionThread_2 timeoutThread(&readWriteLock, &startup, &waitCondition, 1000),
waitingThread1(&readWriteLock, &startup, &waitCondition);
timeoutThread.start();
waitingThread1.start();
readWriteLock.lockForRead();
// wait for the threads to start up
while (!timeoutThread.ready
|| !waitingThread1.ready) {
startup.wait(&readWriteLock);
}
QTest::qWait(2000);
waitCondition.wakeOne();
readWriteLock.unlock();
QVERIFY(timeoutThread.wait(5000));
QVERIFY(!timeoutThread.returnValue);
QVERIFY(waitingThread1.wait(5000));
QVERIFY(waitingThread1.returnValue);
}
}
QTEST_MAIN(tst_QWaitCondition)
#include "tst_qwaitcondition.moc"