Exception Class Reference(QtConcurrent::Exception)The Exception class provides a base class for exceptions that can transferred across threads. Далее... #include <QtCore> Inherited by: QtConcurrent::UnhandledException. Этот класс был введён в Qt 4.4. Открытые функции
Подробное описаниеThe Exception 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 QtConcurrent::Exception and implement two helper functions: class MyException : public QtConcurrent::Exception { public: void raise() const { throw *this; } Exception *clone() const { return new MyException(*this); } }; QtConcurrent::Exception 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 QtConcurrent::Exception, the Qt Concurrent functions will throw a QtConcurrent::UnhandledException in the receiver thread. When using QFuture, transferred exceptions will be thrown when calling the following functions: Описание функций-членовException * Exception::clone () const [virtual]In your QtConcurrent::Exception subclass, reimplement clone() like this: MyException *MyException::clone() const { return new MyException(*this); } void Exception::raise () const [virtual]In your QtConcurrent::Exception subclass, reimplement raise() like this: void MyException::raise() const { throw *this; } |
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