[Interest] Connecting signal handler to Qt application - async-handler-safety

Giuseppe D'Angelo giuseppe.dangelo at kdab.com
Mon Jun 15 13:06:28 CEST 2020

Il 15/06/20 12:58, Bernhard Lindner ha scritto:
> Are there any functions in Qt that are considered async-handler-safe?

No, as any of them may allocate memory.

See https://doc.qt.io/qt-5/unix-signals.html for the textbook solution 
(self pipe trick).

On Linux you can also use signalfd(2) to achieve the same without the 
burden of a custom signal handler.

Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
KDAB (France) S.A.S., a KDAB Group company
Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
KDAB - The Qt, C++ and OpenGL Experts

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