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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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 <qobject.h>
#include <private/qringbuffer_p.h>
#include <qt_windows.h>
QT_BEGIN_NAMESPACE
class Q_CORE_EXPORT QWindowsPipeReader : public QObject
{
Q_OBJECT
public:
explicit QWindowsPipeReader(QObject *parent = 0);
~QWindowsPipeReader();
void setHandle(HANDLE hPipeReadEnd);
void startAsyncRead();
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);
bool isReadOperationActive() const { return readSequenceStarted; }
Q_SIGNALS:
void winError(ulong, const QString &);
void readyRead();
void pipeClosed();
void _q_queueReadyRead(QPrivateSignal);
private:
static void CALLBACK readFileCompleted(DWORD errorCode, DWORD numberOfBytesTransfered,
OVERLAPPED *overlappedBase);
void notified(DWORD errorCode, DWORD numberOfBytesRead);
DWORD checkPipeState();
bool waitForNotification(int timeout);
void emitPendingReadyRead();
class Overlapped : public OVERLAPPED
{
Q_DISABLE_COPY_MOVE(Overlapped)
public:
explicit Overlapped(QWindowsPipeReader *reader);
void clear();
QWindowsPipeReader *pipeReader;
};
HANDLE handle;
Overlapped overlapped;
qint64 readBufferMaxSize;
QRingBuffer readBuffer;
qint64 actualReadBufferSize;
bool stopped;
bool readSequenceStarted;
bool notifiedCalled;
bool pipeBroken;
bool readyReadPending;
bool inReadyRead;
};
QT_END_NAMESPACE
#endif // QWINDOWSPIPEREADER_P_H
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