extract QWindowsPipeReader from qlocalsocket_win.cpp

The code for reading named pipes can now be used in
other places as well.

Change-Id: Id734617a3927e369491a6c5daf965169ceb01f74
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/src/corelib/io/qwindowspipereader_p.h b/src/corelib/io/qwindowspipereader_p.h
new file mode 100644
index 0000000000..12dd593f8f
--- /dev/null
+++ b/src/corelib/io/qwindowspipereader_p.h
@@ -0,0 +1,122 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+** 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.
+**
+** 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWINDOWSPIPEREADER_P_H
+#define QWINDOWSPIPEREADER_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <qbytearray.h>
+#include <qobject.h>
+#include <qtimer.h>
+#include <qt_windows.h>
+
+#include <private/qringbuffer_p.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Core)
+
+class QWinEventNotifier;
+
+class Q_CORE_EXPORT QWindowsPipeReader : public QObject
+{
+    Q_OBJECT
+public:
+    explicit QWindowsPipeReader(QObject *parent = 0);
+    ~QWindowsPipeReader();
+
+    void setHandle(HANDLE hPipeReadEnd);
+    void stop();
+
+    void setMaxReadBufferSize(qint64 size) { readBufferMaxSize = size; }
+    qint64 maxReadBufferSize() const { return readBufferMaxSize; }
+
+    bool isPipeClosed() const { return pipeBroken; }
+    qint64 bytesAvailable() const;
+    qint64 read(char *data, qint64 maxlen);
+    bool canReadLine() const;
+    bool waitForReadyRead(int msecs);
+    bool waitForPipeClosed(int msecs);
+
+    void startAsyncRead();
+    bool completeAsyncRead();
+
+Q_SIGNALS:
+    void winError(ulong, const QString &);
+    void readyRead();
+    void pipeClosed();
+
+private Q_SLOTS:
+    bool readEventSignalled();
+
+private:
+    DWORD checkPipeState();
+
+private:
+    HANDLE handle;
+    OVERLAPPED overlapped;
+    QWinEventNotifier *dataReadNotifier;
+    qint64 readBufferMaxSize;
+    QRingBuffer readBuffer;
+    int actualReadBufferSize;
+    bool readSequenceStarted;
+    QTimer *emitReadyReadTimer;
+    bool pipeBroken;
+    static const qint64 initialReadBufferSize = 4096;
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QWINDOWSPIPEREADER_P_H