Long live Qt for S60!

22 files changed, 2506 insertions, 0 deletions

diff --git a/tests/auto/qsharedmemory/.gitignore b/tests/auto/qsharedmemory/.gitignore
new file mode 100644
index 0000000..03ddcf2
--- /dev/null
+++ b/tests/auto/qsharedmemory/.gitignore
@@ -0,0 +1,3 @@
+tst_qsharedmemory
+lackey/lackey.exe
+qsystemlock/tst_qsystemlock.exe
diff --git a/tests/auto/qsharedmemory/lackey/lackey.pro b/tests/auto/qsharedmemory/lackey/lackey.pro
new file mode 100644
index 0000000..9d2fcad
--- /dev/null
+++ b/tests/auto/qsharedmemory/lackey/lackey.pro
@@ -0,0 +1,18 @@
+include(../src/src.pri)
+
+QT = core script
+
+CONFIG += qtestlib
+
+DESTDIR = ./
+
+win32: CONFIG += console
+mac:CONFIG -= app_bundle
+
+DEFINES	+= QSHAREDMEMORY_DEBUG
+DEFINES	+= QSYSTEMSEMAPHORE_DEBUG
+
+SOURCES		+= main.cpp 
+TARGET		= lackey
+
+
diff --git a/tests/auto/qsharedmemory/lackey/main.cpp b/tests/auto/qsharedmemory/lackey/main.cpp
new file mode 100644
index 0000000..5b3cffc
--- /dev/null
+++ b/tests/auto/qsharedmemory/lackey/main.cpp
@@ -0,0 +1,368 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+
+#include <qscriptengine.h>
+
+#include <QtCore/QFile>
+#include <QtCore/QTextStream>
+#include <QTest>
+
+#include <qstringlist.h>
+#include <stdlib.h>
+#include <qsharedmemory.h>
+#include <qsystemsemaphore.h>
+#include <qsystemlock.h>
+
+class ScriptSystemSemaphore : public QObject
+{
+    Q_OBJECT
+
+public:
+    ScriptSystemSemaphore(QObject *parent = 0) : QObject(parent), ss(QString())
+    {
+    }
+
+public slots:
+    bool acquire()
+    {
+        return ss.acquire();
+    };
+
+    bool release(int n = 1)
+    {
+        return ss.release(n);
+    };
+
+    void setKey(const QString &key, int n = 0)
+    {
+        ss.setKey(key, n);
+    };
+
+    QString key() const
+    {
+        return ss.key();
+    }
+
+private:
+    QSystemSemaphore ss;
+};
+
+class ScriptSystemLock : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QString key WRITE setKey READ key)
+
+public:
+    ScriptSystemLock(QObject *parent = 0) : QObject(parent), sl(QString())
+    {
+    }
+
+public slots:
+
+    bool lockReadOnly()
+    {
+        return sl.lock(QSystemLock::ReadOnly);
+    }
+
+    bool lock()
+    {
+        return sl.lock();
+    };
+
+    bool unlock()
+    {
+        return sl.unlock();
+    };
+
+    void setKey(const QString &key)
+    {
+        sl.setKey(key);
+    };
+
+    QString key() const
+    {
+        return sl.key();
+    }
+
+private:
+    QSystemLock sl;
+};
+
+class ScriptSharedMemory : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(bool attached READ isAttached)
+    Q_PROPERTY(QString key WRITE setKey READ key)
+
+public:
+    enum SharedMemoryError
+    {
+        NoError = 0,
+        PermissionDenied = 1,
+        InvalidSize = 2,
+        KeyError = 3,
+        AlreadyExists = 4,
+        NotFound = 5,
+        LockError = 6,
+        OutOfResources = 7,
+        UnknownError = 8
+    };
+
+    ScriptSharedMemory(QObject *parent = 0) : QObject(parent)
+    {
+    }
+
+public slots:
+    void sleep(int x) const
+    {
+        QTest::qSleep(x);
+    }
+
+    bool create(int size)
+    {
+        return sm.create(size);
+    };
+
+    bool createReadOnly(int size)
+    {
+        return sm.create(size, QSharedMemory::ReadOnly);
+    };
+
+    int size() const
+    {
+        return sm.size();
+    };
+
+    bool attach()
+    {
+        return sm.attach();
+    };
+
+    bool attachReadOnly()
+    {
+        return sm.attach(QSharedMemory::ReadOnly);
+    };
+
+    bool isAttached() const
+    {
+        return sm.isAttached();
+    };
+
+    bool detach()
+    {
+        return sm.detach();
+    };
+
+    int error() const
+    {
+        return (int)sm.error();
+    };
+
+    QString errorString() const
+    {
+        return sm.errorString();
+    };
+
+    void set(int i, QChar value)
+    {
+        ((char*)sm.data())[i] = value.toLatin1();
+    }
+
+    QString get(int i)
+    {
+        return QChar::fromLatin1(((char*)sm.data())[i]);
+    }
+
+    char *data() const
+    {
+        return (char*)sm.data();
+    };
+
+    void setKey(const QString &key)
+    {
+        sm.setKey(key);
+    };
+
+    QString key() const
+    {
+        return sm.key();
+    }
+
+    bool lock()
+    {
+        return sm.lock();
+    }
+
+    bool unlock()
+    {
+        return sm.unlock();
+    }
+
+private:
+    QSharedMemory sm;
+};
+
+Q_SCRIPT_DECLARE_QMETAOBJECT(ScriptSharedMemory, QObject*);
+Q_SCRIPT_DECLARE_QMETAOBJECT(ScriptSystemLock, QObject*);
+Q_SCRIPT_DECLARE_QMETAOBJECT(ScriptSystemSemaphore, QObject*);
+
+static void interactive(QScriptEngine &eng)
+{
+#ifdef Q_OS_WINCE
+    fprintf(stderr, "Interactive mode not supported on Windows CE\n");
+    return;
+#endif
+    QTextStream qin(stdin, QFile::ReadOnly);
+
+    const char *qscript_prompt = "qs> ";
+    const char *dot_prompt = ".... ";
+    const char *prompt = qscript_prompt;
+
+    QString code;
+
+    forever {
+        QString line;
+
+        printf("%s", prompt);
+        fflush(stdout);
+
+        line = qin.readLine();
+        if (line.isNull())
+        break;
+
+        code += line;
+        code += QLatin1Char('\n');
+
+        if (line.trimmed().isEmpty()) {
+            continue;
+
+        } else if (! eng.canEvaluate(code)) {
+            prompt = dot_prompt;
+
+        } else {
+            QScriptValue result = eng.evaluate(code);
+            code.clear();
+            prompt = qscript_prompt;
+            if (!result.isUndefined())
+                fprintf(stderr, "%s\n", qPrintable(result.toString()));
+        }
+    }
+}
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+
+    QScriptEngine eng;
+    QScriptValue globalObject = eng.globalObject();
+
+    QScriptValue sm = qScriptValueFromQMetaObject<ScriptSharedMemory>(&eng);
+    eng.globalObject().setProperty("ScriptSharedMemory", sm);
+
+    QScriptValue sl = qScriptValueFromQMetaObject<ScriptSystemLock>(&eng);
+    eng.globalObject().setProperty("ScriptSystemLock", sl);
+
+    QScriptValue ss = qScriptValueFromQMetaObject<ScriptSystemSemaphore>(&eng);
+    eng.globalObject().setProperty("ScriptSystemSemaphore", ss);
+
+
+    if (! *++argv) {
+        interactive(eng);
+        return EXIT_SUCCESS;
+    }
+
+    QStringList arguments = app.arguments();
+    arguments.takeFirst();
+
+    while (!arguments.isEmpty()) {
+        QString fn = arguments.takeFirst();
+
+        if (fn == QLatin1String("-i")) {
+            interactive(eng);
+            break;
+        }
+
+        QString contents;
+
+        if (fn == QLatin1String("-")) {
+            QTextStream stream(stdin, QFile::ReadOnly);
+            contents = stream.readAll();
+        } else {
+            QFile file(fn);
+	    if (!file.exists()) {
+                fprintf(stderr, "%s doesn't exists\n", qPrintable(fn));
+	        return EXIT_FAILURE;
+	    }
+            if (file.open(QFile::ReadOnly)) {
+                QTextStream stream(&file);
+                contents = stream.readAll();
+                file.close();
+            }
+        }
+
+        if (contents.isEmpty())
+            continue;
+
+        if (contents[0] == '#') {
+            contents.prepend("//");
+            QScriptValue args = eng.newArray();
+            args.setProperty("0", QScriptValue(&eng, fn));
+            int i = 1;
+            while (!arguments.isEmpty())
+                args.setProperty(i++, QScriptValue(&eng, arguments.takeFirst()));
+            eng.currentContext()->activationObject().setProperty("args", args);
+        }
+        QScriptValue r = eng.evaluate(contents);
+        if (eng.hasUncaughtException()) {
+            int line = eng.uncaughtExceptionLineNumber();
+            fprintf(stderr, "%d: %s\n\t%s\n\n", line, qPrintable(fn), qPrintable(r.toString()));
+            return EXIT_FAILURE;
+        }
+        if (r.isNumber())
+            return r.toInt32();
+    }
+
+    return EXIT_SUCCESS;
+}
+
+#include "main.moc"
diff --git a/tests/auto/qsharedmemory/lackey/scripts/consumer.js b/tests/auto/qsharedmemory/lackey/scripts/consumer.js
new file mode 100644
index 0000000..4d12dca
--- /dev/null
+++ b/tests/auto/qsharedmemory/lackey/scripts/consumer.js
@@ -0,0 +1,41 @@
+function QVERIFY(x, debugInfo) {
+    if (!(x)) {
+        print(debugInfo);
+        throw(debugInfo);
+    }
+}
+
+var consumer = new ScriptSharedMemory;
+consumer.setKey("market");
+
+//print("consumer starting");
+var tries = 0;;
+while(!consumer.attach()) {
+    if (tries == 5000) {
+        var message = "consumer exiting, waiting too long";
+        print(message);
+        throw(message);
+    }
+    ++tries;
+    consumer.sleep(1);
+}
+//print("consumer attached");
+
+
+var i = 0;
+while(true) {
+    QVERIFY(consumer.lock(), "lock");
+    if (consumer.get(0) == 'Q') {
+        consumer.set(0, ++i);
+        //print ("consumer sets" + i);
+    }
+    if (consumer.get(0) == 'E') {
+        QVERIFY(consumer.unlock(), "unlock");
+        break;
+    }
+    QVERIFY(consumer.unlock(), "unlock");
+    consumer.sleep(10);
+}
+
+//print("consumer detaching");
+QVERIFY(consumer.detach());
diff --git a/tests/auto/qsharedmemory/lackey/scripts/producer.js b/tests/auto/qsharedmemory/lackey/scripts/producer.js
new file mode 100644
index 0000000..e02cd8b
--- /dev/null
+++ b/tests/auto/qsharedmemory/lackey/scripts/producer.js
@@ -0,0 +1,44 @@
+function QVERIFY(x, debugInfo) {
+    if (!(x)) {
+        print(debugInfo);
+        throw(debugInfo);
+    }
+}
+
+var producer = new ScriptSharedMemory;
+producer.setKey("market");
+
+var size = 1024;
+if (!producer.create(size)) {
+    QVERIFY(producer.error() == 4, "create");
+    QVERIFY(producer.attach());
+}
+//print ("producer created and attached");
+
+QVERIFY(producer.lock());
+producer.set(0, 'Q');
+QVERIFY(producer.unlock());
+
+var i = 0;
+while(i < 5) {
+    QVERIFY(producer.lock(), "lock");
+    if (producer.get(0) == 'Q') {
+        QVERIFY(producer.unlock(), "unlock");
+        producer.sleep(1);
+        continue;
+    }
+    //print("producer: " + i);
+    ++i;
+    producer.set(0, 'Q');
+    QVERIFY(producer.unlock(), "unlock");
+    producer.sleep(1);
+}
+QVERIFY(producer.lock());
+producer.set(0, 'E');
+QVERIFY(producer.unlock());
+
+//print ("producer done");
+
+// Sleep for a bit to let all consumers start, otherwise they will get stuck in the attach loop,
+// because at least in Symbian the shared memory will be destroyed if there are no active handles to it.
+producer.sleep(3000);
\ No newline at end of file
diff --git a/tests/auto/qsharedmemory/lackey/scripts/readonly_segfault.js b/tests/auto/qsharedmemory/lackey/scripts/readonly_segfault.js
new file mode 100644
index 0000000..3eaf789
--- /dev/null
+++ b/tests/auto/qsharedmemory/lackey/scripts/readonly_segfault.js
@@ -0,0 +1,4 @@
+var sm = new ScriptSharedMemory;
+sm.setKey("readonly_segfault");
+sm.createReadOnly(1024);
+var data = sm.set(0, "a");
diff --git a/tests/auto/qsharedmemory/lackey/scripts/systemlock_read.js b/tests/auto/qsharedmemory/lackey/scripts/systemlock_read.js
new file mode 100644
index 0000000..1048bc7
--- /dev/null
+++ b/tests/auto/qsharedmemory/lackey/scripts/systemlock_read.js
@@ -0,0 +1,11 @@
+function QVERIFY(x, debugInfo) {
+    if (!(x)) {
+        print(debugInfo);
+        throw(debugInfo);
+    }
+}
+
+var lock = new ScriptSystemLock;
+lock.setKey("market");
+QVERIFY(lock.lockReadOnly());
+QVERIFY(lock.unlock());
\ No newline at end of file
diff --git a/tests/auto/qsharedmemory/lackey/scripts/systemlock_readwrite.js b/tests/auto/qsharedmemory/lackey/scripts/systemlock_readwrite.js
new file mode 100644
index 0000000..fc6367f
--- /dev/null
+++ b/tests/auto/qsharedmemory/lackey/scripts/systemlock_readwrite.js
@@ -0,0 +1,11 @@
+function QVERIFY(x, debugInfo) {
+    if (!(x)) {
+        print(debugInfo);
+        throw(debugInfo);
+    }
+}
+
+var lock = new ScriptSystemLock;
+lock.setKey("market");
+QVERIFY(lock.lock());
+QVERIFY(lock.unlock());
diff --git a/tests/auto/qsharedmemory/lackey/scripts/systemsemaphore_acquire.js b/tests/auto/qsharedmemory/lackey/scripts/systemsemaphore_acquire.js
new file mode 100644
index 0000000..5cff429
--- /dev/null
+++ b/tests/auto/qsharedmemory/lackey/scripts/systemsemaphore_acquire.js
@@ -0,0 +1,18 @@
+#/bin/qscript
+function QVERIFY(x, debugInfo) {
+    if (!(x)) {
+        print(debugInfo);
+        throw(debugInfo);
+    }
+}
+
+
+var sem = new ScriptSystemSemaphore;
+sem.setKey("store");
+
+var count = Number(args[1]);
+if (isNaN(count))
+    count = 1;
+for (var i = 0; i < count; ++i)
+    QVERIFY(sem.acquire());
+print("done aquiring");
diff --git a/tests/auto/qsharedmemory/lackey/scripts/systemsemaphore_acquirerelease.js b/tests/auto/qsharedmemory/lackey/scripts/systemsemaphore_acquirerelease.js
new file mode 100644
index 0000000..cedde3f
--- /dev/null
+++ b/tests/auto/qsharedmemory/lackey/scripts/systemsemaphore_acquirerelease.js
@@ -0,0 +1,11 @@
+function QVERIFY(x, debugInfo) {
+    if (!(x)) {
+        print(debugInfo);
+        throw(debugInfo);
+    }
+}
+
+var lock = new ScriptSystemSemaphore;
+lock.setKey("store");
+QVERIFY(lock.acquire());
+QVERIFY(lock.release());
diff --git a/tests/auto/qsharedmemory/lackey/scripts/systemsemaphore_release.js b/tests/auto/qsharedmemory/lackey/scripts/systemsemaphore_release.js
new file mode 100644
index 0000000..c805e0f
--- /dev/null
+++ b/tests/auto/qsharedmemory/lackey/scripts/systemsemaphore_release.js
@@ -0,0 +1,11 @@
+function QVERIFY(x, debugInfo) {
+    if (!(x)) {
+        print(debugInfo);
+        throw(debugInfo);
+    }
+}
+
+var sem = new ScriptSystemSemaphore;
+sem.setKey("store");
+QVERIFY(sem.release());
+print ("done releasing");
diff --git a/tests/auto/qsharedmemory/qsharedmemory.pro b/tests/auto/qsharedmemory/qsharedmemory.pro
new file mode 100644
index 0000000..0aad554
--- /dev/null
+++ b/tests/auto/qsharedmemory/qsharedmemory.pro
@@ -0,0 +1,4 @@
+TEMPLATE = subdirs
+SUBDIRS = lackey test qsystemlock
+
+
diff --git a/tests/auto/qsharedmemory/qsystemlock/qsystemlock.pro b/tests/auto/qsharedmemory/qsystemlock/qsystemlock.pro
new file mode 100644
index 0000000..042ab3f
--- /dev/null
+++ b/tests/auto/qsharedmemory/qsystemlock/qsystemlock.pro
@@ -0,0 +1,16 @@
+CONFIG += qttest_p4
+#QT = core
+
+include(../src/src.pri)
+win32: CONFIG += console
+mac:CONFIG -= app_bundle
+
+DESTDIR = ./
+
+DEFINES	+= QSHAREDMEMORY_DEBUG
+DEFINES	+= QSYSTEMSEMAPHORE_DEBUG
+
+SOURCES		+= tst_qsystemlock.cpp 
+TARGET		= tst_qsystemlock
+
+
diff --git a/tests/auto/qsharedmemory/qsystemlock/tst_qsystemlock.cpp b/tests/auto/qsharedmemory/qsystemlock/tst_qsystemlock.cpp
new file mode 100644
index 0000000..c72b586
--- /dev/null
+++ b/tests/auto/qsharedmemory/qsystemlock/tst_qsystemlock.cpp
@@ -0,0 +1,222 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QtTest/QtTest>
+#include <qsystemlock.h>
+
+//TESTED_CLASS=
+//TESTED_FILES=
+
+#define EXISTING_SHARE "existing"
+
+class tst_QSystemLock : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QSystemLock();
+    virtual ~tst_QSystemLock();
+
+public Q_SLOTS:
+    void init();
+    void cleanup();
+
+private slots:
+    void key_data();
+    void key();
+
+    void basicLock();
+    void complexLock();
+    void lockModes();
+    void sucessive();
+    void processes_data();
+    void processes();
+
+private:
+    QSystemLock *existingLock;
+
+};
+
+tst_QSystemLock::tst_QSystemLock()
+{
+}
+
+tst_QSystemLock::~tst_QSystemLock()
+{
+}
+
+void tst_QSystemLock::init()
+{
+    existingLock = new QSystemLock(EXISTING_SHARE);
+}
+
+void tst_QSystemLock::cleanup()
+{
+    delete existingLock;
+}
+
+void tst_QSystemLock::key_data()
+{
+    QTest::addColumn<QString>("constructorKey");
+    QTest::addColumn<QString>("setKey");
+
+    QTest::newRow("null, null") << QString() << QString();
+    QTest::newRow("null, one") << QString() << QString("one");
+    QTest::newRow("one, two") << QString("one") << QString("two");
+}
+
+/*!
+    Basic key testing
+ */
+void tst_QSystemLock::key()
+{
+    QFETCH(QString, constructorKey);
+    QFETCH(QString, setKey);
+
+    QSystemLock sl(constructorKey);
+    QCOMPARE(sl.key(), constructorKey);
+    sl.setKey(setKey);
+    QCOMPARE(sl.key(), setKey);
+}
+
+void tst_QSystemLock::basicLock()
+{
+    QSystemLock lock("foo");
+    QVERIFY(lock.lock());
+    QVERIFY(lock.unlock());
+}
+
+void tst_QSystemLock::complexLock()
+{
+    QSystemLock lock("foo");
+    QVERIFY(lock.lock(QSystemLock::ReadOnly));
+    QVERIFY(lock.unlock());
+
+    QVERIFY(lock.lock(QSystemLock::ReadWrite));
+    QVERIFY(lock.unlock());
+
+    QVERIFY(lock.lock(QSystemLock::ReadOnly));
+    QVERIFY(lock.lock(QSystemLock::ReadOnly));
+    QVERIFY(lock.unlock());
+    QVERIFY(lock.unlock());
+}
+
+void tst_QSystemLock::lockModes()
+{
+    QSystemLock reader1("library");
+    QSystemLock reader2("library");
+
+    QSystemLock librarian("library");
+    QVERIFY(reader1.lock(QSystemLock::ReadOnly));
+    QVERIFY(reader2.lock(QSystemLock::ReadOnly));
+    QVERIFY(reader1.unlock());
+    QVERIFY(reader2.unlock());
+    QVERIFY(librarian.lock(QSystemLock::ReadWrite));
+    QVERIFY(librarian.unlock());
+}
+
+void tst_QSystemLock::sucessive()
+{
+    QSystemLock lock("library");
+    QVERIFY(lock.lock(QSystemLock::ReadOnly));
+    QVERIFY(lock.lock(QSystemLock::ReadOnly));
+    QVERIFY(lock.lock(QSystemLock::ReadOnly));
+    QVERIFY(lock.lock(QSystemLock::ReadOnly));
+    QVERIFY(lock.lock(QSystemLock::ReadOnly));
+    QVERIFY(lock.unlock());
+    QVERIFY(lock.unlock());
+    QVERIFY(lock.unlock());
+    QVERIFY(lock.unlock());
+    QVERIFY(lock.unlock());
+    QVERIFY(!lock.unlock());
+}
+
+void tst_QSystemLock::processes_data()
+{
+    QTest::addColumn<int>("readOnly");
+    QTest::addColumn<int>("readWrite");
+    for (int i = 0; i < 5; ++i) {
+        QTest::newRow("1/0 process") << 1 << 0;
+        QTest::newRow("0/1 process") << 0 << 1;
+    	QTest::newRow("0/4 process") << 0 << 4;
+        QTest::newRow("1/1 process") << 1 << 1;
+        QTest::newRow("10/1 process") << 10 << 1;
+        QTest::newRow("1/10 process") << 1 << 10;
+        QTest::newRow("10/10 processes") << 10 << 10;
+    }
+}
+
+/*!
+    Create external processes
+ */
+void tst_QSystemLock::processes()
+{
+    QFETCH(int, readOnly);
+    QFETCH(int, readWrite);
+
+    QStringList scripts;
+    for (int i = 0; i < readOnly; ++i)
+        scripts.append("../lackey/scripts/systemlock_read.js");
+    for (int i = 0; i < readWrite; ++i)
+        scripts.append("../lackey/scripts/systemlock_readwrite.js");
+
+    QList<QProcess*> consumers;
+    for (int i = 0; i < scripts.count(); ++i) {
+        QStringList arguments = QStringList() << scripts.at(i);
+        QProcess *p = new QProcess;
+        p->setProcessChannelMode(QProcess::ForwardedChannels);
+        consumers.append(p);
+	p->start("../lackey/lackey", arguments);
+    }
+
+    while (!consumers.isEmpty()) {
+        consumers.first()->waitForFinished(3000);
+	consumers.first()->kill();
+        QCOMPARE(consumers.first()->exitStatus(), QProcess::NormalExit);
+        QCOMPARE(consumers.first()->exitCode(), 0);
+        delete consumers.takeFirst();
+    }
+}
+
+QTEST_MAIN(tst_QSystemLock)
+#include "tst_qsystemlock.moc"
+
diff --git a/tests/auto/qsharedmemory/src/qsystemlock.cpp b/tests/auto/qsharedmemory/src/qsystemlock.cpp
new file mode 100644
index 0000000..5546ebe
--- /dev/null
+++ b/tests/auto/qsharedmemory/src/qsystemlock.cpp
@@ -0,0 +1,246 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include "qsystemlock.h"
+#include "qsystemlock_p.h"
+
+#include <qdebug.h>
+
+/*! \class QSystemLocker
+
+    \brief The QSystemLocker class is a convenience class that simplifies
+    locking and unlocking system locks.
+
+    The purpose of QSystemLocker is to simplify QSystemLock locking and
+    unlocking.  Locking and unlocking a QSystemLock in complex functions and
+    statements or in exception handling code is error-prone and difficult to
+    debug.  QSystemLocker can be used in such situations to ensure that the
+    state of the locks is always well-defined.
+
+    QSystemLocker should be created within a function where a QSystemLock needs
+    to be locked. The system lock is locked when QSystemLocker is created.  If
+    locked, the system lock will be unlocked when the QSystemLocker is
+    destroyed.  QSystemLocker can be unlocked with unlock() and relocked with
+    relock().
+
+    \sa QSystemLock
+ */
+
+/*! \fn QSystemLocker::QSystemLocker()
+
+    Constructs a QSystemLocker and locks \a lock. The \a lock will be
+    unlocked when the QSystemLocker is destroyed. If lock is zero,
+    QSystemLocker does nothing.
+
+    \sa QSystemLock::lock()
+  */
+
+/*! \fn QSystemLocker::~QSystemLocker()
+
+    Destroys the QSystemLocker and unlocks it if it was
+    locked in the constructor.
+
+    \sa QSystemLock::unlock()
+ */
+
+/*! \fn QSystemLocker::systemLock()
+
+    Returns a pointer to the lock that was locked in the constructor.
+ */
+
+/*! \fn QSystemLocker::relock()
+
+    Relocks an unlocked locker.
+
+    \sa unlock()
+  */
+
+/*! \fn QSystemLocker::unlock()
+
+    Unlocks this locker. You can use relock() to lock it again.
+    It does not need to be locked when destroyed.
+
+    \sa relock()
+ */
+
+/*! \class QSystemLock
+
+    \brief The QSystemLock class provides a system wide lock
+    that can be used between threads or processes.
+
+    The purpose of a QSystemLocker is to protect an object that can be
+    accessed by multiple threads or processes such as shared memory or a file.
+
+    For example, say there is a method which prints a message to a log file:
+
+    void log(const QString &logText)
+    {
+        QSystemLock systemLock(QLatin1String("logfile"));
+        systemLock.lock();
+        QFile file(QDir::temp() + QLatin1String("/log"));
+        if (file.open(QIODevice::Append)) {
+            QTextStream out(&file);
+            out << logText;
+        }
+        systemLock.unlock();
+    }
+
+    If this is called from two seperate processes the resulting log file is
+    guaranteed to contain both lines.
+
+    When you call lock(), other threads or processes that try to call lock()
+    with the same key will block until the thread or process that got the lock
+    calls unlock().
+
+    A non-blocking alternative to lock() is tryLock().
+ */
+
+/*!
+    Constructs a new system lock with \a key. The lock is created in an
+    unlocked state.
+
+    \sa lock(), key().
+ */
+QSystemLock::QSystemLock(const QString &key)
+{
+    d = new QSystemLockPrivate;
+    setKey(key);
+}
+
+/*!
+    Destroys a system lock.
+
+    warning: This will not unlock the system lock if it has been locked.
+*/
+QSystemLock::~QSystemLock()
+{
+    d->cleanHandle();
+    delete d;
+}
+
+/*!
+    Sets a new key to this system lock.
+
+    \sa key()
+ */
+void QSystemLock::setKey(const QString &key)
+{
+    if (key == d->key)
+        return;
+    d->cleanHandle();
+    d->lockCount = 0;
+    d->key = key;
+    // cache the file name so it doesn't have to be generated all the time.
+    d->fileName = d->makeKeyFileName();
+    d->error = QSystemLock::NoError;
+    d->errorString = QString();
+    d->handle();
+}
+
+/*!
+    Returns the key assigned to this system lock
+
+    \sa setKey()
+ */
+QString QSystemLock::key() const
+{
+    return d->key;
+}
+
+/*!
+    Locks the system lock.  Lock \a mode can either be ReadOnly or ReadWrite.
+    If a mode is ReadOnly, attempts by other processes to obtain
+    ReadOnly locks will succeed, and ReadWrite attempts will block until
+    all of the ReadOnly locks are unlocked.  If locked as ReadWrite, all
+    other attempts to lock will block until the lock is unlocked.  A given
+    QSystemLock can be locked multiple times without blocking, and will
+    only be unlocked after a corresponding number of unlock()
+    calls are made.  Returns true on success; otherwise returns false.
+
+    \sa unlock(), tryLock()
+ */
+bool QSystemLock::lock(LockMode mode)
+{
+    if (d->lockCount > 0 && mode == ReadOnly && d->lockedMode == ReadWrite) {
+        qWarning() << "QSystemLock::lock readwrite lock on top of readonly lock.";
+        return false;
+    }
+    return d->modifySemaphore(QSystemLockPrivate::Lock, mode);
+}
+
+/*!
+    Unlocks the system lock.
+    Returns true on success; otherwise returns false.
+
+    \sa lock()
+  */
+bool QSystemLock::unlock()
+{
+    if (d->lockCount == 0) {
+        qWarning() << "QSystemLock::unlock: unlock with no lock.";
+        return false;
+    }
+    return d->modifySemaphore(QSystemLockPrivate::Unlock, d->lockedMode);
+}
+
+/*!
+    Returns the type of error that occurred last or NoError.
+
+    \sa errorString()
+ */
+QSystemLock::SystemLockError QSystemLock::error() const
+{
+    return d->error;
+}
+
+/*!
+    Returns the human-readable message appropriate to the current error
+    reported by error(). If no suitable string is available, an empty
+    string is returned.
+
+    \sa error()
+ */
+QString QSystemLock::errorString() const
+{
+    return d->errorString;
+}
+
diff --git a/tests/auto/qsharedmemory/src/qsystemlock.h b/tests/auto/qsharedmemory/src/qsystemlock.h
new file mode 100644
index 0000000..99c2682
--- /dev/null
+++ b/tests/auto/qsharedmemory/src/qsystemlock.h
@@ -0,0 +1,135 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#ifndef QSYSTEMLOCK_H
+#define QSYSTEMLOCK_H
+
+#include <QtCore/qstring.h>
+
+QT_BEGIN_HEADER
+
+#ifndef QT_NO_SYSTEMLOCK
+
+QT_FORWARD_DECLARE_CLASS(QSystemLockPrivate)
+
+class QSystemLock
+{
+
+public:
+    enum SystemLockError
+    {
+        NoError,
+        UnknownError
+    };
+
+    QSystemLock(const QString &key);
+    ~QSystemLock();
+
+    void setKey(const QString &key);
+    QString key() const;
+
+    enum LockMode
+    {
+        ReadOnly,
+        ReadWrite
+    };
+
+    bool lock(LockMode mode = ReadWrite);
+    bool unlock();
+
+    SystemLockError error() const;
+    QString errorString() const;
+
+private:
+    Q_DISABLE_COPY(QSystemLock)
+
+    QSystemLockPrivate *d;
+};
+
+class QSystemLocker
+{
+
+public:
+    inline QSystemLocker(QSystemLock *systemLock,
+                         QSystemLock::LockMode mode = QSystemLock::ReadWrite) : q_lock(systemLock)
+    {
+        autoUnLocked = relock(mode);
+    }
+
+    inline ~QSystemLocker()
+    {
+        if (autoUnLocked)
+            unlock();
+    }
+
+    inline QSystemLock *systemLock() const
+    {
+        return q_lock;
+    }
+
+    inline bool relock(QSystemLock::LockMode mode = QSystemLock::ReadWrite)
+    {
+        return (q_lock && q_lock->lock(mode));
+    }
+
+    inline bool unlock()
+    {
+        if (q_lock && q_lock->unlock()) {
+            autoUnLocked = false;
+            return true;
+        }
+        return false;
+    }
+
+private:
+    Q_DISABLE_COPY(QSystemLocker)
+
+    bool autoUnLocked;
+    QSystemLock *q_lock;
+};
+
+#endif // QT_NO_SYSTEMLOCK
+
+QT_END_HEADER
+
+#endif // QSYSTEMLOCK_H
+
diff --git a/tests/auto/qsharedmemory/src/qsystemlock_p.h b/tests/auto/qsharedmemory/src/qsystemlock_p.h
new file mode 100644
index 0000000..8c84ccf
--- /dev/null
+++ b/tests/auto/qsharedmemory/src/qsystemlock_p.h
@@ -0,0 +1,107 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#ifndef QSYSTEMLOCK_P_H
+#define QSYSTEMLOCK_P_H
+
+#ifndef QT_NO_SYSTEMLOCK
+
+#include "qsystemlock.h"
+#include "private/qsharedmemory_p.h"
+#include <sys/types.h>
+
+#define MAX_LOCKS 64
+
+class QSystemLockPrivate
+{
+
+public:
+    QSystemLockPrivate();
+
+    QString makeKeyFileName()
+    {
+        return QSharedMemoryPrivate::makePlatformSafeKey(key, QLatin1String("qipc_systemlock_"));
+    }
+
+    void setErrorString(const QString &function);
+
+#ifdef Q_OS_WIN
+    HANDLE handle();
+    bool lock(HANDLE, int count);
+    bool unlock(HANDLE, int count);
+#else
+    key_t handle();
+#endif
+    void cleanHandle();
+
+    enum Operation {
+        Lock,
+        Unlock
+    };
+    bool modifySemaphore(Operation op, QSystemLock::LockMode mode = QSystemLock::ReadOnly);
+
+    QString key;
+    QString fileName;
+#ifdef Q_OS_WIN
+    HANDLE semaphore;
+    HANDLE semaphoreLock;
+#else
+    int semaphore;
+#endif
+    int lockCount;
+    QSystemLock::LockMode lockedMode;
+
+    QSystemLock::SystemLockError error;
+    QString errorString;
+
+private:
+#ifndef Q_OS_WIN
+    key_t unix_key;
+    bool createdFile;
+    bool createdSemaphore;
+#endif
+};
+
+#endif // QT_NO_SYSTEMLOCK
+
+#endif // QSYSTEMLOCK_P_H
+
diff --git a/tests/auto/qsharedmemory/src/qsystemlock_unix.cpp b/tests/auto/qsharedmemory/src/qsystemlock_unix.cpp
new file mode 100644
index 0000000..d28185f
--- /dev/null
+++ b/tests/auto/qsharedmemory/src/qsystemlock_unix.cpp
@@ -0,0 +1,233 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include "qsystemlock.h"
+#include "qsystemlock_p.h"
+
+#include <qdebug.h>
+#include <qfile.h>
+
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/shm.h>
+#include <unistd.h>
+
+#include <sys/sem.h>
+// We have to define this as on some sem.h will have it
+union qt_semun {
+    int val;                    /* value for SETVAL */
+    struct semid_ds *buf;       /* buffer for IPC_STAT, IPC_SET */
+    unsigned short *array;      /* array for GETALL, SETALL */
+};
+
+#define tr(x) QT_TRANSLATE_NOOP(QLatin1String("QSystemLock"), (x))
+
+#if defined(Q_OS_SYMBIAN)
+int createUnixKeyFile(const QString &fileName)
+{
+    if (QFile::exists(fileName))
+        return 0;
+
+    int fd = open(QFile::encodeName(fileName).constData(),
+            O_EXCL | O_CREAT | O_RDWR, 0640);
+    if (-1 == fd) {
+        if (errno == EEXIST)
+            return 0;
+        return -1;
+    } else {
+        close(fd);
+    }
+    return 1;
+}
+#endif
+
+QSystemLockPrivate::QSystemLockPrivate() :
+        semaphore(-1), lockCount(0),
+        error(QSystemLock::NoError), unix_key(-1), createdFile(false), createdSemaphore(false)
+{
+}
+
+void QSystemLockPrivate::setErrorString(const QString &function)
+{
+    switch (errno) {
+    case EIDRM:
+        errorString = function + QLatin1String(": ") + tr("The semaphore set was removed");
+        error = QSystemLock::UnknownError;
+        break;
+    default:
+        errorString = function + QLatin1String(": ") + tr("unknown error");
+        error = QSystemLock::UnknownError;
+        qWarning() << errorString << "key" << key << "errno" << errno << ERANGE << ENOMEM << EINVAL << EINTR << EFBIG << EFAULT << EAGAIN << EACCES << E2BIG;
+    }
+}
+
+/*!
+    \internal
+
+    Setup unix_key
+ */
+key_t QSystemLockPrivate::handle()
+{
+    if (key.isEmpty())
+        return -1;
+
+    // ftok requires that an actual file exists somewhere
+    // If we have already made at some point in the past,
+    // double check that it is still there.
+    if (-1 != unix_key) {
+        int aNewunix_key = ftok(QFile::encodeName(fileName).constData(), 'Q');
+        if (aNewunix_key != unix_key) {
+            cleanHandle();
+        } else {
+            return unix_key;
+        }
+    }
+
+    // Create the file needed for ftok
+#if defined(Q_OS_SYMBIAN)
+    int built = createUnixKeyFile(fileName);
+#else
+    int built = QSharedMemoryPrivate::createUnixKeyFile(fileName);
+#endif
+    if (-1 == built)
+        return -1;
+    createdFile = (1 == built);
+
+    // Get the unix key for the created file
+    unix_key = ftok(QFile::encodeName(fileName).constData(), 'Q');
+    if (-1 == unix_key) {
+        setErrorString(QLatin1String("QSystemLock::handle ftok"));
+        return -1;
+    }
+
+    // Get semaphore
+    semaphore = semget(unix_key, 1, 0666 | IPC_CREAT | IPC_EXCL);
+    if (-1 == semaphore) {
+        if (errno == EEXIST)
+            semaphore = semget(unix_key, 1, 0666 | IPC_CREAT);
+        if (-1 == semaphore) {
+            setErrorString(QLatin1String("QSystemLock::handle semget"));
+            cleanHandle();
+            return -1;
+        }
+    } else {
+        // Created semaphore, initialize value.
+        createdSemaphore = true;
+        qt_semun init_op;
+        init_op.val = MAX_LOCKS;
+        if (-1 == semctl(semaphore, 0, SETVAL, init_op)) {
+            setErrorString(QLatin1String("QSystemLock::handle semctl"));
+            cleanHandle();
+            return -1;
+        }
+    }
+
+    return unix_key;
+}
+
+/*!
+    \internal
+
+    Cleanup the unix_key
+ */
+void QSystemLockPrivate::cleanHandle()
+{
+    unix_key = -1;
+
+    // remove the file if we made it
+    if (createdFile) {
+        if (!QFile::remove(fileName))
+            setErrorString(QLatin1String("QSystemLock::cleanHandle QFile::remove"));
+        createdFile = false;
+    }
+
+    if (createdSemaphore) {
+        if (-1 != semaphore) {
+            if (-1 == semctl(semaphore, 0, IPC_RMID)) {
+                setErrorString(QLatin1String("QSystemLock::cleanHandle semctl"));
+            }
+            semaphore = -1;
+        }
+        createdSemaphore = false;
+    }
+}
+
+/*!
+    \internal
+
+    modifySemaphore generates operation.sem_op and handles recursive behavior.
+ */
+bool QSystemLockPrivate::modifySemaphore(QSystemLockPrivate::Operation op,
+        QSystemLock::LockMode mode)
+{
+    if (-1 == handle())
+        return false;
+
+    if ((lockCount == 0 && op == Lock) || (lockCount > 0 && op == Unlock)) {
+        if (op == Unlock) {
+            --lockCount;
+            Q_ASSERT(lockCount >= 0);
+            if (lockCount > 0)
+                return true;
+        }
+
+        struct sembuf operation;
+        operation.sem_num = 0;
+        operation.sem_op = (mode == QSystemLock::ReadWrite) ? MAX_LOCKS : 1;
+        if (op == Lock)
+            operation.sem_op *= -1;
+        operation.sem_flg = SEM_UNDO;
+
+        if (-1 == semop(semaphore, &operation, 1)) {
+            setErrorString(QLatin1String("QSystemLock::modify"));
+            return false;
+        }
+        lockedMode = mode;
+    }
+    if (op == Lock)
+        lockCount++;
+
+    return true;
+}
+
diff --git a/tests/auto/qsharedmemory/src/qsystemlock_win.cpp b/tests/auto/qsharedmemory/src/qsystemlock_win.cpp
new file mode 100644
index 0000000..62f1b1b
--- /dev/null
+++ b/tests/auto/qsharedmemory/src/qsystemlock_win.cpp
@@ -0,0 +1,190 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include "qsystemlock.h"
+#include "qsystemlock_p.h"
+#include <qdebug.h>
+#include <QtCore>
+QSystemLockPrivate::QSystemLockPrivate() :
+        semaphore(0), semaphoreLock(0),
+	lockCount(0), error(QSystemLock::NoError)
+{
+}
+
+void QSystemLockPrivate::setErrorString(const QString &function)
+{
+    BOOL windowsError = GetLastError();
+    if (windowsError == 0)
+        return;
+    errorString = function + QLatin1String(": ")
+                    + QLatin1String("Unknown error");
+    error = QSystemLock::UnknownError;
+    qWarning() << errorString << "key" << key << (int)windowsError << semaphore << semaphoreLock;
+}
+
+/*!
+    \internal
+
+    Setup the semaphore
+ */
+HANDLE QSystemLockPrivate::handle()
+{
+    // don't allow making handles on empty keys
+    if (key.isEmpty())
+        return 0;
+
+    // Create it if it doesn't already exists.
+    if (semaphore == 0) {
+        QString safeName = makeKeyFileName();
+        QT_WA({
+            semaphore = CreateSemaphoreW(0, MAX_LOCKS, MAX_LOCKS, (TCHAR*)safeName.utf16());
+        }, {
+            semaphore = CreateSemaphoreA(0, MAX_LOCKS, MAX_LOCKS, safeName.toLocal8Bit().constData());
+        });
+
+        if (semaphore == 0) {
+            setErrorString(QLatin1String("QSystemLockPrivate::handle"));
+	    return 0;
+	}
+    }
+
+    if (semaphoreLock == 0) {
+	QString safeLockName = QSharedMemoryPrivate::makePlatformSafeKey(key + QLatin1String("lock"), QLatin1String("qipc_systemlock_"));
+        QT_WA({
+            semaphoreLock = CreateSemaphoreW(0,
+                 1, 1, (TCHAR*)safeLockName.utf16());
+        }, {
+            semaphoreLock = CreateSemaphoreA(0,
+                 1, 1, safeLockName.toLocal8Bit().constData());
+        });
+        if (semaphoreLock == 0) {
+            setErrorString(QLatin1String("QSystemLockPrivate::handle"));
+	    return 0;
+	}
+    }
+    return semaphore;
+}
+
+/*!
+    \internal
+
+    Cleanup the semaphore
+ */
+void QSystemLockPrivate::cleanHandle()
+{
+    if (semaphore && !CloseHandle(semaphore))
+        setErrorString(QLatin1String("QSystemLockPrivate::cleanHandle:"));
+    if (semaphoreLock && !CloseHandle(semaphoreLock))
+        setErrorString(QLatin1String("QSystemLockPrivate::cleanHandle:"));
+    semaphore = 0;
+    semaphoreLock = 0;
+}
+
+bool QSystemLockPrivate::lock(HANDLE handle, int count)
+{
+    if (count == 1) {
+	WaitForSingleObject(handle, INFINITE);
+	return true;
+    }
+
+    int i = count;
+    while (i > 0) {
+	if (WAIT_OBJECT_0 == WaitForSingleObject(handle, 0)) {
+	    --i;
+	} else {
+	    // undo what we have done, sleep and then try again later
+	    ReleaseSemaphore(handle, (count - i), 0);
+	    i = count;
+	    ReleaseSemaphore(semaphoreLock, 1, 0);
+	    Sleep(1);
+	    WaitForSingleObject(semaphoreLock, INFINITE);
+	}
+    }
+    return true;
+}
+
+bool QSystemLockPrivate::unlock(HANDLE handle, int count)
+{
+    if (0 == ReleaseSemaphore(handle, count, 0)) {
+        setErrorString(QLatin1String("QSystemLockPrivate::unlock"));
+        return false;
+    }
+    return true;
+}
+
+/*!
+    \internal
+
+    modifySemaphore handles recursive behavior and modifies the semaphore.
+ */
+bool QSystemLockPrivate::modifySemaphore(QSystemLockPrivate::Operation op,
+        QSystemLock::LockMode mode)
+{
+    if (0 == handle())
+        return false;
+
+    if ((lockCount == 0 && op == Lock) || (lockCount > 0 && op == Unlock)) {
+        if (op == Unlock) {
+            --lockCount;
+            Q_ASSERT(lockCount >= 0);
+            if (lockCount > 0)
+                return true;
+        }
+
+        int count = (mode == QSystemLock::ReadWrite) ? MAX_LOCKS : 1;
+        if (op == Lock) {
+            lock(semaphoreLock, 1);
+            lock(semaphore, count);
+            if (count != MAX_LOCKS) unlock(semaphoreLock, 1);
+	    lockedMode = mode;
+        } else {
+            if (count == MAX_LOCKS) unlock(semaphoreLock, 1);
+	    unlock(semaphore, count);
+        }
+
+    }
+    if (op == Lock)
+        lockCount++;
+
+    return true;
+}
+
diff --git a/tests/auto/qsharedmemory/src/src.pri b/tests/auto/qsharedmemory/src/src.pri
new file mode 100644
index 0000000..5bc9de6
--- /dev/null
+++ b/tests/auto/qsharedmemory/src/src.pri
@@ -0,0 +1,10 @@
+INCLUDEPATH += $$PWD
+DEPENDPATH += $$PWD
+
+SOURCES += $$PWD/qsystemlock.cpp
+
+HEADERS += $$PWD/qsystemlock.h \
+           $$PWD/qsystemlock_p.h
+
+unix:SOURCES += $$PWD/qsystemlock_unix.cpp
+win32:SOURCES += $$PWD/qsystemlock_win.cpp
diff --git a/tests/auto/qsharedmemory/test/test.pro b/tests/auto/qsharedmemory/test/test.pro
new file mode 100644
index 0000000..779a942
--- /dev/null
+++ b/tests/auto/qsharedmemory/test/test.pro
@@ -0,0 +1,35 @@
+load(qttest_p4)
+
+include(../src/src.pri)
+QT -= gui
+
+DEFINES	+= QSHAREDMEMORY_DEBUG
+DEFINES	+= QSYSTEMSEMAPHORE_DEBUG
+
+SOURCES += ../tst_qsharedmemory.cpp
+TARGET = ../tst_qsharedmemory
+
+!wince*:win32 {
+  CONFIG(debug, debug|release) {
+    TARGET = ../../debug/tst_qsharedmemory
+} else {
+    TARGET = ../../release/tst_qsharedmemory
+  }
+}
+
+wince*:{
+QT += gui script
+addFiles.sources = ../lackey/lackey.exe ../lackey/scripts
+addFiles.path = lackey
+DEPLOYMENT += addFiles
+DEFINES += SRCDIR=\\\"\\\"
+}else:symbian*{
+QT += gui script
+addFiles.sources = ../lackey/scripts
+addFiles.path = /data/qsharedmemorytemp/lackey
+addBin.sources = lackey.exe
+addBin.path = /sys/bin
+DEPLOYMENT += addFiles addBin
+} else {
+DEFINES += SRCDIR=\\\"$$PWD/../\\\"
+}
diff --git a/tests/auto/qsharedmemory/tst_qsharedmemory.cpp b/tests/auto/qsharedmemory/tst_qsharedmemory.cpp
new file mode 100644
index 0000000..3c63d9d
--- /dev/null
+++ b/tests/auto/qsharedmemory/tst_qsharedmemory.cpp
@@ -0,0 +1,768 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QtTest/QtTest>
+#include <qsharedmemory.h>
+
+//TESTED_CLASS=
+//TESTED_FILES=
+
+#define EXISTING_SHARE "existing"
+#define EXISTING_SIZE 1024
+
+#ifdef Q_OS_SYMBIAN
+#define SRCDIR "c:/data/qsharedmemorytemp/"
+#endif
+Q_DECLARE_METATYPE(QSharedMemory::SharedMemoryError)
+Q_DECLARE_METATYPE(QSharedMemory::AccessMode)
+
+class tst_QSharedMemory : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QSharedMemory();
+    virtual ~tst_QSharedMemory();
+
+public Q_SLOTS:
+    void init();
+    void cleanup();
+
+private slots:
+    // basics
+    void constructor();
+    void key_data();
+    void key();
+    void create_data();
+    void create();
+    void attach_data();
+    void attach();
+    void lock();
+
+    // custom edge cases
+    void removeWhileAttached();
+    void emptyMemory();
+    void readOnly();
+
+    // basics all together
+    void simpleProducerConsumer_data();
+    void simpleProducerConsumer();
+    void simpleDoubleProducerConsumer();
+
+    // with threads
+    void simpleThreadedProducerConsumer_data();
+    void simpleThreadedProducerConsumer();
+
+    // with processes
+    void simpleProcessProducerConsumer_data();
+    void simpleProcessProducerConsumer();
+
+    // extreme cases
+    void useTooMuchMemory();
+    void attachTooMuch();
+
+protected:
+    int remove(const QString &key);
+
+    QString rememberKey(const QString &key)
+    {
+        if (key == EXISTING_SHARE)
+            return key;
+        if (!keys.contains(key)) {
+            keys.append(key);
+            remove(key);
+        }
+        return key;
+    }
+
+    QStringList keys;
+    QList<QSharedMemory*> jail;
+    QSharedMemory *existingSharedMemory;
+};
+
+tst_QSharedMemory::tst_QSharedMemory() : existingSharedMemory(0)
+{
+}
+
+tst_QSharedMemory::~tst_QSharedMemory()
+{
+}
+
+void tst_QSharedMemory::init()
+{
+    existingSharedMemory = new QSharedMemory(EXISTING_SHARE);
+    if (!existingSharedMemory->create(EXISTING_SIZE)) {
+        QVERIFY(existingSharedMemory->error() == QSharedMemory::AlreadyExists);
+    }
+}
+
+void tst_QSharedMemory::cleanup()
+{
+    delete existingSharedMemory;
+    qDeleteAll(jail.begin(), jail.end());
+    jail.clear();
+
+    keys.append(EXISTING_SHARE);
+    for (int i = 0; i < keys.count(); ++i) {
+        QSharedMemory sm(keys.at(i));
+        if (!sm.create(1024)) {
+            //if(sm.error() != QSharedMemory::KeyError)
+            //    qWarning() << "test cleanup: remove failed:" << keys.at(i) << sm.error() << sm.errorString();
+            sm.attach();
+            sm.detach();
+            remove(keys.at(i));
+        }
+    }
+}
+
+#ifndef Q_OS_WIN
+#include "private/qsharedmemory_p.h"
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#endif
+
+int tst_QSharedMemory::remove(const QString &key)
+{
+#ifndef Q_OS_WIN
+    // On unix the shared memory might exists from a previously failed test
+    // or segfault, remove it it does
+    if (key.isEmpty())
+        return -1;
+
+    // ftok requires that an actual file exists somewhere
+    QString fileName = QSharedMemoryPrivate::makePlatformSafeKey(key);
+    if (!QFile::exists(fileName)) {
+        //qDebug() << "exits failed";
+        return -2;
+    }
+
+    int unix_key = ftok(fileName.toLatin1().constData(), 'Q');
+    if (-1 == unix_key) {
+        qDebug() << "ftok failed";
+        return -3;
+    }
+
+    int id = shmget(unix_key, 0, 0660);
+    if (-1 == id) {
+        qDebug() << "shmget failed";
+        return -4;
+    }
+
+    struct shmid_ds shmid_ds;
+    if (-1 == shmctl(id, IPC_RMID, &shmid_ds)) {
+        qDebug() << "shmctl failed";
+        return -5;
+    }
+    return QFile::remove(fileName);
+#else
+    Q_UNUSED(key);
+    return 0;
+#endif
+}
+
+/*!
+    Tests the default values
+ */
+void tst_QSharedMemory::constructor()
+{
+    QSharedMemory sm;
+    QCOMPARE(sm.key(), QString());
+    QVERIFY(!sm.isAttached());
+    QVERIFY(sm.data() == 0);
+    QCOMPARE(sm.size(), 0);
+    QCOMPARE(sm.error(), QSharedMemory::NoError);
+    QVERIFY(sm.errorString() == QString());
+}
+
+void tst_QSharedMemory::key_data()
+{
+    QTest::addColumn<QString>("constructorKey");
+    QTest::addColumn<QString>("setKey");
+
+    QTest::newRow("null, null") << QString() << QString();
+    QTest::newRow("null, one") << QString() << QString("one");
+    QTest::newRow("one, two") << QString("one") << QString("two");
+    QTest::newRow("invalid") << QString("o/e") << QString("t/o");
+}
+
+/*!
+    Basic key testing
+ */
+void tst_QSharedMemory::key()
+{
+    QFETCH(QString, constructorKey);
+    QFETCH(QString, setKey);
+
+    QSharedMemory sm(constructorKey);
+    QCOMPARE(sm.key(), constructorKey);
+    sm.setKey(setKey);
+    QCOMPARE(sm.key(), setKey);
+    QCOMPARE(sm.isAttached(), false);
+
+    QCOMPARE(sm.error(), QSharedMemory::NoError);
+    QVERIFY(sm.errorString() == QString());
+    QVERIFY(sm.data() == 0);
+    QCOMPARE(sm.size(), 0);
+
+    QCOMPARE(sm.detach(), false);
+}
+
+void tst_QSharedMemory::create_data()
+{
+    QTest::addColumn<QString>("key");
+    QTest::addColumn<int>("size");
+    QTest::addColumn<bool>("canCreate");
+    QTest::addColumn<QSharedMemory::SharedMemoryError>("error");
+
+    QTest::newRow("null key") << QString() << 1024
+        << false << QSharedMemory::LockError;
+    QTest::newRow("-1 size") << QString("negsize") << -1
+        << false << QSharedMemory::InvalidSize;
+    QTest::newRow("nor size") << QString("norsize") << 1024
+        << true << QSharedMemory::NoError;
+    QTest::newRow("already exists") << QString(EXISTING_SHARE) << EXISTING_SIZE
+        << false << QSharedMemory::AlreadyExists;
+}
+
+/*!
+    Basic create testing
+ */
+void tst_QSharedMemory::create()
+{
+    QFETCH(QString, key);
+    QFETCH(int, size);
+    QFETCH(bool, canCreate);
+    QFETCH(QSharedMemory::SharedMemoryError, error);
+
+    QSharedMemory sm(rememberKey(key));
+    QCOMPARE(sm.create(size), canCreate);
+    if(sm.error() != error)
+        qDebug() << sm.errorString();
+    QCOMPARE(sm.key(), key);
+    if (canCreate) {
+        QVERIFY(sm.errorString() == QString());
+        QVERIFY(sm.data() != 0);
+        QVERIFY(sm.size() != 0);
+    } else {
+        QVERIFY(sm.data() == 0);
+        QVERIFY(sm.errorString() != QString());
+    }
+}
+
+void tst_QSharedMemory::attach_data()
+{
+    QTest::addColumn<QString>("key");
+    QTest::addColumn<bool>("exists");
+    QTest::addColumn<QSharedMemory::SharedMemoryError>("error");
+
+    QTest::newRow("null key") << QString() << false << QSharedMemory::LockError;
+    QTest::newRow("doesn't exists") << QString("doesntexists") << false << QSharedMemory::NotFound;
+    QTest::newRow("already exists") << QString(EXISTING_SHARE) << true << QSharedMemory::NoError;
+}
+
+/*!
+    Basic attach/detach testing
+ */
+void tst_QSharedMemory::attach()
+{
+    QFETCH(QString, key);
+    QFETCH(bool, exists);
+    QFETCH(QSharedMemory::SharedMemoryError, error);
+#ifdef Q_OS_HPUX
+    if (QLatin1String(QTest::currentDataTag()) == QLatin1String("already exists")) {
+        QSKIP("HPUX doesn't allow for multiple attaches per process", SkipSingle);
+    }
+#endif
+    QSharedMemory sm(key);
+    QCOMPARE(sm.attach(), exists);
+    QCOMPARE(sm.isAttached(), exists);
+    QCOMPARE(sm.error(), error);
+    QCOMPARE(sm.key(), key);
+    if (exists) {
+        QVERIFY(sm.data() != 0);
+        QVERIFY(sm.size() != 0);
+        QCOMPARE(sm.errorString(), QString());
+        QVERIFY(sm.detach());
+        // Make sure detach doesn't screw up something and we can't re-attach.
+        QVERIFY(sm.attach());
+        QVERIFY(sm.detach());
+        QCOMPARE(sm.size(), 0);
+        QVERIFY(sm.data() == 0);
+    } else {
+        QVERIFY(sm.data() == 0);
+        QVERIFY(sm.size() == 0);
+        QVERIFY(sm.errorString() != QString());
+        QVERIFY(!sm.detach());
+    }
+}
+
+void tst_QSharedMemory::lock()
+{
+    QSharedMemory shm;
+    QVERIFY(!shm.lock());
+    QCOMPARE(shm.error(), QSharedMemory::LockError);
+
+    shm.setKey(QLatin1String("qsharedmemory"));
+
+    QVERIFY(!shm.lock());
+    QCOMPARE(shm.error(), QSharedMemory::LockError);
+
+    QVERIFY(shm.create(100));
+    QVERIFY(shm.lock());
+    QTest::ignoreMessage(QtWarningMsg, "QSharedMemory::lock: already locked");
+    QVERIFY(shm.lock());
+    // don't lock forever
+}
+
+/*!
+    Other shared memory are allowed to be attached after we remove,
+    but new shared memory are not allowed to attach after a remove.
+ */
+void tst_QSharedMemory::removeWhileAttached()
+{
+#ifdef Q_OS_HPUX
+    QSKIP("HPUX doesn't allow for multiple attaches per process", SkipAll);
+#endif
+    rememberKey("one");
+
+    // attach 1
+    QSharedMemory *smOne = new QSharedMemory(QLatin1String("one"));
+    QVERIFY(smOne->create(1024));
+    QVERIFY(smOne->isAttached());
+
+    // attach 2
+    QSharedMemory *smTwo = new QSharedMemory(QLatin1String("one"));
+    QVERIFY(smTwo->attach());
+    QVERIFY(smTwo->isAttached());
+
+    // detach 1 and remove, remove one first to catch another error.
+    delete smOne;
+    delete smTwo;
+
+    // three shouldn't be able to attach
+    QSharedMemory smThree(QLatin1String("one"));
+    QVERIFY(!smThree.attach());
+    QCOMPARE(smThree.error(), QSharedMemory::NotFound);
+}
+
+/*!
+    The memory should be set to 0 after created.
+ */
+void tst_QSharedMemory::emptyMemory()
+{
+    QSharedMemory sm(rememberKey(QLatin1String("voidland")));
+    int size = 1024;
+    QVERIFY(sm.create(size, QSharedMemory::ReadOnly));
+    char *get = (char*)sm.data();
+    char null = 0;
+    for (int i = 0; i < size; ++i)
+        QCOMPARE(get[i], null);
+}
+
+/*!
+    Verify that attach with ReadOnly is actually read only
+    by writing to data and causing a segfault.
+*/
+void tst_QSharedMemory::readOnly()
+{
+#ifdef Q_OS_WIN
+    QSKIP("This test opens a crash dialog on Windows", SkipSingle);
+#endif
+#if defined (Q_OS_SYMBIAN)
+    QSKIP("Readonly shared memory is not supported in symbian", SkipAll);
+#endif
+    QString program = "./lackey/lackey";
+    QStringList arguments;
+    rememberKey("readonly_segfault");
+    arguments << SRCDIR "lackey/scripts/readonly_segfault.js";
+
+    // ### on windows disable the popup somehow
+    QProcess p;
+    p.start(program, arguments);
+    p.setProcessChannelMode(QProcess::ForwardedChannels);
+    p.waitForFinished();
+    QCOMPARE(p.error(), QProcess::Crashed);
+}
+
+/*!
+    Keep making shared memory until the kernel stops us.
+ */
+void tst_QSharedMemory::useTooMuchMemory()
+{
+#ifdef Q_OS_LINUX
+    bool success = true;
+    int count = 0;
+    while (success) {
+        QString key = QString("maxmemorytest_%1").arg(count++);
+        QSharedMemory *sm = new QSharedMemory(rememberKey(key));
+        QVERIFY(sm);
+        jail.append(sm);
+        int size = 32768 * 1024;
+        success = sm->create(size);
+        if (!success && sm->error() == QSharedMemory::AlreadyExists) {
+            // left over from a crash, clean it up
+            sm->attach();
+            sm->detach();
+            success = sm->create(size);
+        }
+
+        if (!success) {
+            QVERIFY(!sm->isAttached());
+            QCOMPARE(sm->key(), key);
+            QCOMPARE(sm->size(), 0);
+            QVERIFY(sm->data() == 0);
+            if (sm->error() != QSharedMemory::OutOfResources)
+                qDebug() << sm->error() << sm->errorString();
+            // ### Linux wont return OutOfResources if there are not enough semaphores to use.
+            QVERIFY(sm->error() == QSharedMemory::OutOfResources
+                    || sm->error() == QSharedMemory::LockError);
+            QVERIFY(sm->errorString() != QString());
+            QVERIFY(!sm->attach());
+            QVERIFY(!sm->detach());
+        } else {
+            QVERIFY(sm->isAttached());
+        }
+    }
+#endif
+}
+
+/*!
+    Create one shared memory (government) and see how many other shared memories (wars) we can
+    attach before the system runs out of resources.
+ */
+void tst_QSharedMemory::attachTooMuch()
+{
+    QSKIP("disabled", SkipAll);
+#ifdef Q_OS_HPUX
+    QSKIP("HPUX doesn't allow for multiple attaches per process", SkipAll);
+#endif
+#ifdef Q_OS_WINCE
+    QSKIP("This nearly kills the system itself, so skip for Qt/WinCE", SkipAll);
+#endif
+    QSharedMemory government(rememberKey("government"));
+    QVERIFY(government.create(1024));
+    while (true) {
+        QSharedMemory *war = new QSharedMemory(government.key());
+        QVERIFY(war);
+        jail.append(war);
+        if (!war->attach()) {
+            QVERIFY(!war->isAttached());
+            QCOMPARE(war->key(), government.key());
+            QCOMPARE(war->size(), 0);
+            QVERIFY(war->data() == 0);
+            QCOMPARE(war->error(), QSharedMemory::OutOfResources);
+            QVERIFY(war->errorString() != QString());
+            QVERIFY(!war->detach());
+            break;
+        } else {
+            QVERIFY(war->isAttached());
+        }
+    }
+}
+
+void tst_QSharedMemory::simpleProducerConsumer_data()
+{
+    QTest::addColumn<QSharedMemory::AccessMode>("mode");
+
+    QTest::newRow("readonly") << QSharedMemory::ReadOnly;
+    QTest::newRow("readwrite") << QSharedMemory::ReadWrite;
+}
+
+/*!
+    The basic consumer producer that rounds out the basic testing.
+    If this fails then any muli-threading/process might fail (but be
+    harder to debug)
+
+    This doesn't require nor test any locking system.
+ */
+void tst_QSharedMemory::simpleProducerConsumer()
+{
+#ifdef Q_OS_HPUX
+    QSKIP("HPUX doesn't allow for multiple attaches per process", SkipAll);
+#endif
+    QFETCH(QSharedMemory::AccessMode, mode);
+
+    rememberKey(QLatin1String("market"));
+    QSharedMemory producer(QLatin1String("market"));
+    QSharedMemory consumer(QLatin1String("market"));
+    int size = 512;
+    QVERIFY(producer.create(size));
+    QVERIFY(consumer.attach(mode));
+
+    char *put = (char*)producer.data();
+    char *get = (char*)consumer.data();
+    // On Windows CE you always have ReadWrite access. Thus
+    // ViewMapOfFile returns the same pointer
+    // On Symbian, the address will always be same, as
+    // write protection of chunks is not currently supported by Symbian
+#if !defined(Q_OS_WINCE) && !defined(Q_OS_SYMBIAN)
+    QVERIFY(put != get);
+#endif
+    for (int i = 0; i < size; ++i) {
+        put[i] = 'Q';
+        QCOMPARE(get[i], 'Q');
+    }
+    QVERIFY(consumer.detach());
+}
+
+void tst_QSharedMemory::simpleDoubleProducerConsumer()
+{
+#ifdef Q_OS_HPUX
+    QSKIP("HPUX doesn't allow for multiple attaches per process", SkipAll);
+#endif
+    rememberKey(QLatin1String("market"));
+    QSharedMemory producer(QLatin1String("market"));
+    int size = 512;
+    QVERIFY(producer.create(size));
+    QVERIFY(producer.detach());
+    QVERIFY(producer.create(size));
+
+    {
+        QSharedMemory consumer(QLatin1String("market"));
+        QVERIFY(consumer.attach());
+    }
+}
+
+class Consumer : public QThread
+{
+
+public:
+    void run()
+    {
+        QSharedMemory consumer(QLatin1String("market"));
+        while (!consumer.attach()) {
+            if (consumer.error() != QSharedMemory::NotFound)
+                qDebug() << "consumer: failed to connect" << consumer.error() << consumer.errorString();
+            QVERIFY(consumer.error() == QSharedMemory::NotFound || consumer.error() == QSharedMemory::KeyError);
+            QTest::qWait(1);
+        }
+
+        char *memory = (char*)consumer.data();
+
+        int i = 0;
+        while (true) {
+            if(!consumer.lock())
+                break;
+            if (memory[0] == 'Q')
+                memory[0] = ++i;
+            if (memory[0] == 'E') {
+                memory[1]++;
+                QVERIFY(consumer.unlock());
+                break;
+            }
+            QVERIFY(consumer.unlock());
+            QTest::qWait(1);
+        }
+
+        QVERIFY(consumer.detach());
+    }
+};
+
+class Producer : public QThread
+{
+
+public:
+    void run()
+    {
+        QSharedMemory producer(QLatin1String("market"));
+        int size = 1024;
+        if (!producer.create(size)) {
+            // left over from a crash...
+            if (producer.error() == QSharedMemory::AlreadyExists) {
+                producer.attach();
+                producer.detach();
+                QVERIFY(producer.create(size));
+            }
+        }
+        QVERIFY(producer.isAttached());
+        char *memory = (char*)producer.data();
+        memory[1] = '0';
+        QTime timer;
+        timer.start();
+        int i = 0;
+        while (i < 5 && timer.elapsed() < 5000) {
+            QVERIFY(producer.lock());
+            if (memory[0] == 'Q') {
+                QVERIFY(producer.unlock());
+                QTest::qWait(1);
+                continue;
+            }
+            ++i;
+            memory[0] = 'Q';
+            QVERIFY(producer.unlock());
+            QTest::qWait(1);
+        }
+
+        // tell everyone to quit
+        QVERIFY(producer.lock());
+        memory[0] = 'E';
+        QVERIFY(producer.unlock());
+
+#if defined(Q_OS_SYMBIAN)
+        // Sleep a while to ensure that consumers start properly
+        QTest::qSleep(1000);
+#endif
+    }
+private:
+
+};
+
+void tst_QSharedMemory::simpleThreadedProducerConsumer_data()
+{
+    QTest::addColumn<bool>("producerIsThread");
+    QTest::addColumn<int>("threads");
+    for (int i = 0; i < 5; ++i) {
+        QTest::newRow("1 consumer, producer is thread") << true << 1;
+        QTest::newRow("1 consumer, producer is this") << false << 1;
+        QTest::newRow("5 consumers, producer is thread") << true << 5;
+        QTest::newRow("5 consumers, producer is this") << false << 5;
+    }
+}
+
+/*!
+    The basic producer/consumer, but this time using threads.
+ */
+void tst_QSharedMemory::simpleThreadedProducerConsumer()
+{
+    QFETCH(bool, producerIsThread);
+    QFETCH(int, threads);
+    rememberKey(QLatin1String("market"));
+
+#if defined Q_OS_HPUX && defined __ia64
+    QSKIP("This test locks up on gravlaks.troll.no", SkipSingle);
+#endif
+
+    Producer p;
+#if defined(Q_OS_SYMBIAN)
+    p.setStackSize(0x14000);
+#endif
+    if (producerIsThread)
+        p.start();
+
+    QList<Consumer*> consumers;
+    for (int i = 0; i < threads; ++i) {
+        consumers.append(new Consumer());
+#if defined(Q_OS_SYMBIAN)
+        consumers.last()->setStackSize(0x14000);
+#endif
+        consumers.last()->start();
+    }
+
+    if (!producerIsThread)
+        p.run();
+
+    p.wait(5000);
+    while (!consumers.isEmpty()) {
+        QVERIFY(consumers.first()->wait(5000));
+        delete consumers.takeFirst();
+    }
+}
+
+void tst_QSharedMemory::simpleProcessProducerConsumer_data()
+{
+    QTest::addColumn<int>("processes");
+    int tries = 10;
+#ifdef Q_OS_WIN
+    tries = 5;
+#endif
+    for (int i = 0; i < tries; ++i) {
+        QTest::newRow("1 process") << 1;
+        QTest::newRow("5 processes") << 5;
+    }
+}
+
+/*!
+    Create external processes that produce and consume.
+ */
+void tst_QSharedMemory::simpleProcessProducerConsumer()
+{
+#if defined (Q_OS_SYMBIAN) && defined(Q_CC_NOKIAX86)
+    QSKIP("Cannot launch multiple Qt processes in Symbian emulator", SkipAll);
+#endif
+    QFETCH(int, processes);
+
+    rememberKey("market");
+
+#ifndef Q_OS_WINCE
+    QStringList arguments = QStringList() << SRCDIR "lackey/scripts/producer.js";
+#else
+    QStringList arguments = QStringList() << QFileInfo(SRCDIR "lackey/scripts/producer.js").absoluteFilePath();
+#endif
+    QProcess producer;
+    producer.setProcessChannelMode(QProcess::ForwardedChannels);
+    producer.start("./lackey/lackey", arguments);
+    producer.waitForStarted();
+    QVERIFY(producer.error() != QProcess::FailedToStart);
+
+    QList<QProcess*> consumers;
+    for (int i = 0; i < processes; ++i) {
+#ifndef Q_OS_WINCE
+        QStringList arguments = QStringList() << SRCDIR  "lackey/scripts/consumer.js";
+#else
+        QStringList arguments = QStringList() << QFileInfo(SRCDIR "lackey/scripts/consumer.js").absoluteFilePath();
+#endif
+        QProcess *p = new QProcess;
+        p->setProcessChannelMode(QProcess::ForwardedChannels);
+        consumers.append(p);
+        p->start("./lackey/lackey", arguments);
+    }
+
+    producer.waitForFinished(5000);
+
+    bool consumerFailed = false;
+
+    while (!consumers.isEmpty()) {
+        consumers.first()->waitForFinished(1000);
+        if (consumers.first()->state() == QProcess::Running ||
+            consumers.first()->exitStatus() != QProcess::NormalExit ||
+            consumers.first()->exitCode() != 0) {
+                consumerFailed = true;
+            }
+        delete consumers.takeFirst();
+    }
+    QCOMPARE(consumerFailed, false);
+}
+
+QTEST_MAIN(tst_QSharedMemory)
+#include "tst_qsharedmemory.moc"
+