0

我有一个 QthreadPool 可以同时连接多达 5 个串行设备。每个串行设备定义为：

struct serialDevice
{
    std::shared_ptr<QSerialPort>  port;
    QByteArray                    portData;
};

在 GUI 中，单击按钮后，我调用串行设备管理器serialManager->startAcquisition(portNames)，如下所示：

#include "serialmanager.h"
serialManager::serialManager(QObject *parent) : QObject(parent)
{
    pool = new QThreadPool();
    pool->setMaxThreadCount(5);
}

void serialManager::startAcquisition(QStringList pNames)
{
    foreach (QString port, pNames)
    {
        this->stablishConnection(port);
    }
}

void serialManager::stablishConnection(QString pName)
{
    ComPort *workerPort = new ComPort();
    workerPort->setAutoDelete(true);
    workerPort->setName(pName);

    connect(this, SIGNAL(finished()), workerPort, SLOT(onTaskeFinished()));

    pool->start(workerPort);
}

连接设备后，我会轮询设备。调用停止函数时线程终止。我希望readyRead()正在发出信号，以便填充sensor->portData：

#include "serialmanager.h"
#include <QEventLoop>

ComPort::ComPort(QObject *parent) : QObject(parent)
{
}

void ComPort::run()
{
    QEventLoop loop;
    connect(this, SIGNAL(finished()), &loop, SLOT(quit()));

    sensor       = std::make_shared<serialDevice> ();
    sensor->port = std::make_shared<QSerialPort> ();
    sensor->port->setPortName(this->portName);
    sensor->port->setBaudRate(QSerialPort::Baud19200);
    sensor->port->setDataBits(QSerialPort::Data8);
    sensor->port->setFlowControl(QSerialPort::NoFlowControl);
    sensor->port->setParity(QSerialPort::NoParity);
    sensor->port->setStopBits(QSerialPort::OneStop);

    QString strPort;
    if (sensor->port->open(QIODevice::ReadWrite) == true)
    {
        connect(sensor->port.get(), SIGNAL(error(QSerialPort::SerialPortError)), this, SLOT(onErrorReceived()));
        connect(sensor->port.get(), SIGNAL(readyRead()), this, SLOT(onReadyRead()));
    }
    else
    {
        strPort = "> " + sensor->port->portName() + " device is not streaming: " + sensor->port->errorString();
        emit this->newMsgAvailable(strPort);
        emit this->finished();
    }
    loop.exec();
}

void ComPort::onReadyRead()
{
    QByteArray bytes = this->sensor->port->readAll();
    this->sensor->portData.append(bytes);
}

void ComPort::onTaskeFinished()
{
    QString strPort = "> Finished streaming at " + sensor->port->portName();
    emit newMsgAvailable(strPort);
    emit this->finished();
}

void ComPort::onErrorReceived()
{
    QString strPort = "> Data stream on "  + sensor->port->portName() + " failed: " + sensor->port->errorString();
    emit newMsgAvailable(strPort);
}

问题定义： 没有readyRead()发出信号。我在这里读过，要处理 a 中的事件QRunnable，线程需要有自己的事件循环。所以我QEventLoop loop把Run()每个ComPort. 现在readyRead()被触发，我从每个端口接收数据一段时间，然后突然之间应用程序崩溃并出现分段错误：

0   VerifierDisableFaultInjectionExclusionRange C:\WINDOWS\syswow64\verifier.dll                0x53457378  
1   VerifierDisableFaultInjectionExclusionRange C:\WINDOWS\syswow64\verifier.dll                0x53457495  
2   VerifierDisableFaultInjectionExclusionRange C:\WINDOWS\syswow64\verifier.dll                0x5345b651  
3   VerifierCheckPageHeapAllocation             C:\WINDOWS\syswow64\verifier.dll                0x53460b12  
4   ??                                          C:\WINDOWS\SysWOW64\vfbasics.dll                0x533d179f  
5   msvcrt!free                                 C:\WINDOWS\SysWOW64\msvcrt.dll                  0x7509b0f9  
6   ??                                                                                          0x19120000  
7   ??                                          C:\WINDOWS\SysWOW64\vfbasics.dll                0x533d26a5  
8   QArrayData::deallocate                                                              130 
9   QTypedArrayData<char>::deallocate                                                   234     0x6b9cbcfd  
10  QByteArray::resize                                                                  1448    0x6b79bc23  
11  QRingBuffer::append                                                                 383     0x645893ae  
12  QSerialPortPrivate::_q_completeAsyncRead                                            529     0x6458523f  
13  QSerialPort::qt_static_metacall                                                     353     0x64582dae  
14  QMetaObject::activate                                                               3681    0x6b955027  
15  QMetaObject::activate                                                               3547    0x6b95498c  
16  QWinEventNotifier::activated                                                        134     0x6b9ad529  
17  QWinEventNotifier::event                                                            241     0x6b976af1  
18  QApplicationPrivate::notify_helper                                                  3499    0xf33df61   
19  QApplication::notify                                                                2952    0xf33ba13   
20  QCoreApplication::notifyInternal                                                    935     0x6b929eee  
... <More>
4

0 回答 0