aboutsummaryrefslogtreecommitdiffstats
path: root/doc/codesnippets/doc/src/snippets/threads/threads.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'doc/codesnippets/doc/src/snippets/threads/threads.cpp')
-rw-r--r--doc/codesnippets/doc/src/snippets/threads/threads.cpp121
1 files changed, 121 insertions, 0 deletions
diff --git a/doc/codesnippets/doc/src/snippets/threads/threads.cpp b/doc/codesnippets/doc/src/snippets/threads/threads.cpp
new file mode 100644
index 000000000..5eeb85b26
--- /dev/null
+++ b/doc/codesnippets/doc/src/snippets/threads/threads.cpp
@@ -0,0 +1,121 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial Usage
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** 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 http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QCache>
+#include <QMutex>
+#include <QThreadStorage>
+
+#include "threads.h"
+
+//! [0]
+void MyThread::run()
+//! [0] //! [1]
+{
+//! [1] //! [2]
+}
+//! [2]
+
+#define Counter ReentrantCounter
+
+//! [3]
+class Counter
+//! [3] //! [4]
+{
+public:
+ Counter() { n = 0; }
+
+ void increment() { ++n; }
+ void decrement() { --n; }
+ int value() const { return n; }
+
+private:
+ int n;
+};
+//! [4]
+
+#undef Counter
+#define Counter ThreadSafeCounter
+
+//! [5]
+class Counter
+//! [5] //! [6]
+{
+public:
+ Counter() { n = 0; }
+
+ void increment() { QMutexLocker locker(&mutex); ++n; }
+ void decrement() { QMutexLocker locker(&mutex); --n; }
+ int value() const { QMutexLocker locker(&mutex); return n; }
+
+private:
+ mutable QMutex mutex;
+ int n;
+};
+//! [6]
+
+typedef int SomeClass;
+
+//! [7]
+QThreadStorage<QCache<QString, SomeClass> *> caches;
+
+void cacheObject(const QString &key, SomeClass *object)
+//! [7] //! [8]
+{
+ if (!caches.hasLocalData())
+ caches.setLocalData(new QCache<QString, SomeClass>);
+
+ caches.localData()->insert(key, object);
+}
+
+void removeFromCache(const QString &key)
+//! [8] //! [9]
+{
+ if (!caches.hasLocalData())
+ return;
+
+ caches.localData()->remove(key);
+}
+//! [9]
+
+int main()
+{
+ return 0;
+}