1 files changed, 138 insertions, 0 deletions
diff --git a/src/corelib/kernel/qsystemsemaphore_symbian.cpp b/src/corelib/kernel/qsystemsemaphore_symbian.cpp
new file mode 100644
index 0000000000..0d257b8f5e
--- /dev/null
+++ b/src/corelib/kernel/qsystemsemaphore_symbian.cpp
@@ -0,0 +1,138 @@
+/****************************************************************************
+**
+** 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 QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qsystemsemaphore.h"
+#include "qsystemsemaphore_p.h"
+#include "qcoreapplication.h"
+#include <qdebug.h>
+
+#include "qcore_symbian_p.h"
+#include <e32cmn.h>
+QT_BEGIN_NAMESPACE
+
+#ifndef QT_NO_SYSTEMSEMAPHORE
+
+QSystemSemaphorePrivate::QSystemSemaphorePrivate() :
+        error(QSystemSemaphore::NoError)
+{
+}
+
+void QSystemSemaphorePrivate::setErrorString(const QString &function, int err)
+{
+    if (err == KErrNone){
+        return;
+    }
+    switch(err){
+    case KErrAlreadyExists:
+        errorString = QCoreApplication::tr("%1: already exists", "QSystemSemaphore").arg(function);
+        error = QSystemSemaphore::AlreadyExists;
+    break;
+    case KErrNotFound:
+        errorString = QCoreApplication::tr("%1: does not exist", "QSystemSemaphore").arg(function);
+        error = QSystemSemaphore::NotFound;
+    break;
+    case KErrNoMemory:
+    case KErrInUse:
+        errorString = QCoreApplication::tr("%1: out of resources", "QSystemSemaphore").arg(function);
+        error = QSystemSemaphore::OutOfResources;
+        break;
+    case KErrPermissionDenied:
+        errorString = QCoreApplication::tr("%1: permission denied", "QSystemSemaphore").arg(function);
+        error = QSystemSemaphore::PermissionDenied;
+    break;
+default:
+    errorString = QCoreApplication::tr("%1: unknown error %2", "QSystemSemaphore").arg(function).arg(err);
+    error = QSystemSemaphore::UnknownError;
+    }
+
+#if defined QSYSTEMSEMAPHORE_DEBUG
+        qDebug() << errorString << "key" << key;
+#endif
+}
+
+int QSystemSemaphorePrivate::handle(QSystemSemaphore::AccessMode)
+{
+    if (semaphore.Handle()) {
+        return semaphore.Handle();
+    }
+
+    // don't allow making handles on empty keys
+    if (key.isEmpty())
+        return 0;
+
+    TPtrC name(qt_QString2TPtrC(fileName));
+    int err = KErrAlreadyExists;
+    int tryCount = 10;
+    // Sort out race conditions by retrying several times until existing handle is acquired.
+    // Sometimes opening can fail inexplicably with KErrPermissionDenied many times in a row.
+    while (err != KErrNoMemory && err != KErrNone && tryCount-- >= 0) {
+        err = semaphore.CreateGlobal(name, initialValue, EOwnerProcess);
+        if (err != KErrNoMemory && err != KErrNone)
+            err = semaphore.OpenGlobal(name,EOwnerProcess);
+    }
+    if (err){
+        setErrorString(QLatin1String("QSystemSemaphore::handle"),err);
+        return 0;
+    }
+    return semaphore.Handle();
+}
+
+void QSystemSemaphorePrivate::cleanHandle()
+{
+    semaphore.Close();
+}
+
+bool QSystemSemaphorePrivate::modifySemaphore(int count)
+{
+    if (0 == handle())
+        return false;
+
+    if (count > 0) {
+        semaphore.Signal(count);
+    } else {
+        semaphore.Wait();
+        }
+    return true;
+}
+
+#endif //QT_NO_SYSTEMSEMAPHORE
+
+QT_END_NAMESPACE