Re: Reworked qt terminal is much faster – and fails to work on Mac

[Jérôme L. <lod...@us...>]

I agree with Ethan that an event loop should not be necessary in qt_qterm.cpp. 
However, if someone wants to experiment, I have already made such an attempt 
to integrate a Qt event loop within the gnuplot event loop in 
http://sourceforge.net/p/gnuplot/patches/645/
in eventloop.patch

Jérôme


Le mercredi 12 février 2014 20:14:19 sfeam a écrit :
> I don't agree that an event loop is needed for this particular purpose.
> We don't have a case of asynchronous processes sending each other
> signals at random times.  We just want some way for the daughter
> process to signal back to the parent process "I'm ready now, you can
> proceed".   And we want some way for the parent to wait for this
> signal without burning CPU cycles.   One would think from its name that
> QLocalSocket::waitForConnected() provides exactly this service, but
> evidently it doesn't.    At least in linux it should be possible to have the
> parent call sigwait(), and the daughter call kill(parent_pid, SIGUSR1). No
> need to involve Qt in this.
> 
> 	Ethan