The QException class provides a base class for exceptions that can transferred across threads. More...
Header: | #include <QException> |
qmake: | QT += core |
Since: | Qt 5.0 |
Inherited By: |
~QException() | |
virtual QException * | clone() const |
virtual void | raise() const |
The QException class provides a base class for exceptions that can transferred across threads.
Qt Concurrent supports throwing and catching exceptions across thread boundaries, provided that the exception inherit from QException and implement two helper functions:
class MyException : public QException { public: void raise() const override { throw *this; } MyException *clone() const override { return new MyException(*this); } };
QException subclasses must be thrown by value and caught by reference:
try { QtConcurrent::blockingMap(list, throwFunction); // throwFunction throws MyException } catch (MyException &e) { // handle exception }
If you throw an exception that is not a subclass of QException, the Qt functions will throw a QUnhandledException in the receiver thread.
When using QFuture, transferred exceptions will be thrown when calling the following functions:
Destroys the instance of QException.
[virtual]
QException *QException::clone() constIn your QException subclass, reimplement clone() like this:
MyException *MyException::clone() const { return new MyException(*this); }
[virtual]
void QException::raise() constIn your QException subclass, reimplement raise() like this:
void MyException::raise() const { throw *this; }
As part of the free Business evaluation, we offer a free welcome call for companies, to talk about your requirements, and how the Felgo SDK & Services can help you. Just sign up and schedule your call.
Sign up now to start your free Business evaluation: