123 lines
4.0 KiB
C++
123 lines
4.0 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QWINDOWSPIPEREADER_P_H
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#define QWINDOWSPIPEREADER_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include <qobject.h>
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#include <private/qringbuffer_p.h>
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#include <qt_windows.h>
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QT_BEGIN_NAMESPACE
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class Q_CORE_EXPORT QWindowsPipeReader : public QObject
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{
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Q_OBJECT
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public:
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explicit QWindowsPipeReader(QObject *parent = nullptr);
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~QWindowsPipeReader();
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void setHandle(HANDLE hPipeReadEnd);
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void startAsyncRead();
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void stop();
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void setMaxReadBufferSize(qint64 size) { readBufferMaxSize = size; }
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qint64 maxReadBufferSize() const { return readBufferMaxSize; }
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bool isPipeClosed() const { return pipeBroken; }
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qint64 bytesAvailable() const;
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qint64 read(char *data, qint64 maxlen);
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bool canReadLine() const;
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bool waitForReadyRead(int msecs);
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bool waitForPipeClosed(int msecs);
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bool isReadOperationActive() const { return readSequenceStarted; }
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Q_SIGNALS:
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void winError(ulong, const QString &);
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void readyRead();
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void pipeClosed();
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void _q_queueReadyRead(QPrivateSignal);
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private:
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static void CALLBACK readFileCompleted(DWORD errorCode, DWORD numberOfBytesTransfered,
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OVERLAPPED *overlappedBase);
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void notified(DWORD errorCode, DWORD numberOfBytesRead);
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DWORD checkPipeState();
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bool waitForNotification(int timeout);
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void emitPendingReadyRead();
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class Overlapped : public OVERLAPPED
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{
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Q_DISABLE_COPY_MOVE(Overlapped)
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public:
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explicit Overlapped(QWindowsPipeReader *reader);
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void clear();
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QWindowsPipeReader *pipeReader;
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};
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HANDLE handle;
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Overlapped overlapped;
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qint64 readBufferMaxSize;
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QRingBuffer readBuffer;
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qint64 actualReadBufferSize;
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bool stopped;
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bool readSequenceStarted;
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bool notifiedCalled;
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bool pipeBroken;
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bool readyReadPending;
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bool inReadyRead;
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};
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QT_END_NAMESPACE
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#endif // QWINDOWSPIPEREADER_P_H
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