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这部法律是否有可能演变成一种无限的漏洞?
原标题:Could this code potentially run into an infinite loop?

能否将《Qt法典》引入一个无限的漏洞?

QNetworkAccessManager m;
QNetworkReply *reply = m.get(QNetworkRequest(QUrl("http://www.example.org/")));
QEventLoop loop;
QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
loop.exec();
qDebug() << reply->readAll();
delete reply;

这基本上是显示网页内容的“同步”方式。

我没有注意到任何使用它的问题,但我考虑了以下设想:

  • The finished signal of reply is emitted before the event loop is created and the signal-slot connection between finished and quit is made
  • No signal will be emitted from that point forward thus never triggering quit
  • loop.exec() will continually loop

这样做是可能的,还是我不了解Qt事件如何运作?

最佳回答
问题回答

仅在操作loop.exec()之前,可核对reply->isFinished(>。 如果是的话,就没有执行。





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