diff options
Diffstat (limited to 'src/serialport/qserialport_win.cpp')
-rw-r--r-- | src/serialport/qserialport_win.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/serialport/qserialport_win.cpp b/src/serialport/qserialport_win.cpp index 6a1a941..0c61d36 100644 --- a/src/serialport/qserialport_win.cpp +++ b/src/serialport/qserialport_win.cpp @@ -400,6 +400,8 @@ bool QSerialPortPrivate::setDataErrorPolicy(QSerialPort::DataErrorPolicy policy) bool QSerialPortPrivate::completeAsyncCommunication(qint64 bytesTransferred) { + communicationStarted = false; + if (bytesTransferred == qint64(-1)) return false; if (EV_ERR & triggeredEventMask) @@ -453,6 +455,9 @@ bool QSerialPortPrivate::completeAsyncWrite(qint64 bytesTransferred) bool QSerialPortPrivate::startAsyncCommunication() { + if (communicationStarted) + return true; + ::ZeroMemory(&communicationOverlapped, sizeof(communicationOverlapped)); if (!::WaitCommEvent(handle, &triggeredEventMask, &communicationOverlapped)) { QSerialPortErrorInfo error = getSystemError(); @@ -463,6 +468,7 @@ bool QSerialPortPrivate::startAsyncCommunication() return false; } } + communicationStarted = true; return true; } |