Il 15/06/20 18:12, Thiago Macieira ha scritto:
No, you can't, because you need to block the signal using pthread_sigmask in all threads, otherwise the kernel may prefer delivering the signal instead of using the signalfd. Qt has a few background threads (like the QHostInfo thread pool) that you don't have access to.signalfd is a misfeature. Don't use it.
It's very unfortunate that signalfd wants to read a pending signal, rather than being a "special" signal handler that overrides the dispositions. You may get away with installing it before spawning any other thread. But then again, threads+signals+libraries don't exactly mix well together...
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