--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/corelib/kernel/qsystemsemaphore_win.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,136 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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>
+
+QT_BEGIN_NAMESPACE
+        
+#ifndef QT_NO_SYSTEMSEMAPHORE
+
+QSystemSemaphorePrivate::QSystemSemaphorePrivate() :
+        semaphore(0), error(QSystemSemaphore::NoError)
+{
+}
+
+void QSystemSemaphorePrivate::setErrorString(const QString &function)
+{
+    BOOL windowsError = GetLastError();
+    if (windowsError == 0)
+        return;
+
+    switch (windowsError) {
+    case ERROR_NO_SYSTEM_RESOURCES:
+    case ERROR_NOT_ENOUGH_MEMORY:
+        error = QSystemSemaphore::OutOfResources;
+        errorString = QCoreApplication::translate("QSystemSemaphore", "%1: out of resources").arg(function);
+        break;
+    case ERROR_ACCESS_DENIED:
+        error = QSystemSemaphore::PermissionDenied;
+        errorString = QCoreApplication::translate("QSystemSemaphore", "%1: permission denied").arg(function);
+        break;
+    default:
+        errorString = QCoreApplication::translate("QSystemSemaphore", "%1: unknown error %2").arg(function).arg(windowsError);
+        error = QSystemSemaphore::UnknownError;
+#if defined QSYSTEMSEMAPHORE_DEBUG
+        qDebug() << errorString << "key" << key;
+#endif
+    }
+}
+
+HANDLE QSystemSemaphorePrivate::handle(QSystemSemaphore::AccessMode)
+{
+    // 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();
+        semaphore = CreateSemaphore(0, initialValue, MAXLONG, (wchar_t*)safeName.utf16());
+        if (semaphore == NULL)
+            setErrorString(QLatin1String("QSystemSemaphore::handle"));
+    }
+
+    return semaphore;
+}
+
+void QSystemSemaphorePrivate::cleanHandle()
+{
+    if (semaphore && !CloseHandle(semaphore)) {
+#if defined QSYSTEMSEMAPHORE_DEBUG
+        qDebug() << QLatin1String("QSystemSemaphorePrivate::CloseHandle: sem failed");
+#endif
+    }
+    semaphore = 0;
+}
+
+bool QSystemSemaphorePrivate::modifySemaphore(int count)
+{
+    if (0 == handle())
+        return false;
+
+    if (count > 0) {
+	if (0 == ReleaseSemaphore(semaphore, count, 0)) {
+            setErrorString(QLatin1String("QSystemSemaphore::modifySemaphore"));
+#if defined QSYSTEMSEMAPHORE_DEBUG
+            qDebug() << QLatin1String("QSystemSemaphore::modifySemaphore ReleaseSemaphore failed");
+#endif
+            return false;
+        }
+    } else {
+        if (WAIT_OBJECT_0 != WaitForSingleObject(semaphore, INFINITE)) {
+            setErrorString(QLatin1String("QSystemSemaphore::modifySemaphore"));
+#if defined QSYSTEMSEMAPHORE_DEBUG
+            qDebug() << QLatin1String("QSystemSemaphore::modifySemaphore WaitForSingleObject failed");
+#endif
+            return false;
+        }
+    }
+
+    return true;
+}
+
+#endif //QT_NO_SYSTEMSEMAPHORE
+
+QT_END_NAMESPACE