qt-everywhere-src-5.14.1/qtconnectivity/src/bluetooth/android/inputstreamthread.cpp

/****************************************************************************
**
** Copyright (C) 2016 Lauri Laanmets (Proekspert AS) <lauri.laanmets@eesti.ee>
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtBluetooth module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** ensure the GNU Lesser General Public License version 3 requirements
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** General Public License version 2.0 or (at your option) the GNU General
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#include <QtCore/QLoggingCategory>
#include <QtAndroidExtras/QAndroidJniEnvironment>

#include "android/inputstreamthread_p.h"
#include "qbluetoothsocket_android_p.h"

QT_BEGIN_NAMESPACE

Q_DECLARE_LOGGING_CATEGORY(QT_BT_ANDROID)

InputStreamThread::InputStreamThread(QBluetoothSocketPrivateAndroid *socket)
    : QObject(), m_socket_p(socket), expectClosure(false)
{
}

bool InputStreamThread::run()
{
    QMutexLocker lock(&m_mutex);

    javaInputStreamThread = QAndroidJniObject("org/qtproject/qt5/android/bluetooth/QtBluetoothInputStreamThread");
    if (!javaInputStreamThread.isValid() || !m_socket_p->inputStream.isValid())
        return false;

    javaInputStreamThread.callMethod<void>("setInputStream", "(Ljava/io/InputStream;)V",
                                           m_socket_p->inputStream.object<jobject>());
    javaInputStreamThread.setField<jlong>("qtObject", reinterpret_cast<long>(this));
    javaInputStreamThread.setField<jboolean>("logEnabled", QT_BT_ANDROID().isDebugEnabled());

    javaInputStreamThread.callMethod<void>("start");

    return true;
}

qint64 InputStreamThread::bytesAvailable() const
{
    QMutexLocker locker(&m_mutex);
    return m_socket_p->buffer.size();
}

bool InputStreamThread::canReadLine() const
{
    QMutexLocker locker(&m_mutex);
    return m_socket_p->buffer.canReadLine();
}

qint64 InputStreamThread::readData(char *data, qint64 maxSize)
{
    QMutexLocker locker(&m_mutex);

    if (!m_socket_p->buffer.isEmpty())
        return m_socket_p->buffer.read(data, maxSize);

    return 0;
}

//inside the java thread
void InputStreamThread::javaThreadErrorOccurred(int errorCode)
{
    QMutexLocker lock(&m_mutex);

    if (!expectClosure)
        emit error(errorCode);
    else
        emit error(-1); //magic error, -1 means error was expected due to expected close()
}

//inside the java thread
void InputStreamThread::javaReadyRead(jbyteArray buffer, int bufferLength)
{
    QAndroidJniEnvironment env;

    QMutexLocker lock(&m_mutex);
    char *writePtr = m_socket_p->buffer.reserve(bufferLength);
    env->GetByteArrayRegion(buffer, 0, bufferLength, reinterpret_cast<jbyte*>(writePtr));
    emit dataAvailable();
}

void InputStreamThread::prepareForClosure()
{
    QMutexLocker lock(&m_mutex);
    expectClosure = true;
}

QT_END_NAMESPACE