[fpc-pascal] TThread.Suspend under Linux
graemeg.lists at gmail.com
Sat Jun 2 13:58:55 CEST 2007
On 6/2/07, Jonas Maebe <jonas.maebe at elis.ugent.be> wrote:
> > The GUI in frozen after that. Unresponsive, doesn't repaint, etc... I
> > have to kill it with 'xkill' and click on the form.
> No, you can also type "fg" to let the process continue.
Ah, that worked yes...
> > But as soon as I
> > Suspend a thread, it returns me to the prompt! Why???
> Because sending pthread_kill(SIGSTOP) to a particular thread
> apparently has to freeze the entire the process on posix-compliant
> systems, and not just the target thread. Early Linuxthreads
> implementations did not implement this properly and only stopped the
> targeted thread, but this has been fixed in NPTL.
After my post, I google'd some more and found a similar article
explaining the change in Linuxthreads.
> There is no portable way to suspend a thread at an arbitrary point
> under *nix, see
Okay that makes sense. I guess my Thread Manager did actually teach
me something then. :-) Don't use .Suspend
I'll rework the Thread Manager example. The Java link you sent came
in handle and it explains it very well and shows you what alternative
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