Burkhard Carstens wrote:
Am Sonntag, 28. Februar 2010 04:35 schrieb SteveG:
On 28/02/10 13:18, SteveG wrote:
On 28/02/10 13:08, Andrew Brunner wrote:
I would never Process Application Messages from a timer thread.
I suspect a threadlock going on. Does it work OK without the
application.processmessages?
On Sat, Feb 27, 2010 at 9:02 PM, SteveG<[email protected]>
wrote:
I have just updated Laz (svn) and Fpc(2.4.0) and have hit a
problem with my
program. (worked ok with Laz 0.98 / fpc 2.?.?)
I use a dyn loaded lib with my app, which seems to be relevant.
If I call Application.ProcessMessages from within a
TTimer.OnTimer event, my
app now locks solid showing 'futex_wait_queue_me' in the process
listing.
I havent yet been able to narrow down an exact cause, as a simple
app/lib
test works ok.
Would anybody know what would cause the above state (futex), as a
clue to
the change in Laz/Fpc affecting my app ?
It does seem to work without the App.proc call. The problem I have
seems to be caused by calling App.proc once my lib is loaded. This
was the closest I have been able to get in narrowing down to a
small test case. I call App.procMsgs from within my lib which is
where the actual problem seems to be.
Is there any other way to create a 'pause' from within a
library/function call (not sleep, as it 'stops' the program).
My 'pause' function is works as :>
StTm := NOW;
while NOW < (StTm + TmOut) do begin
Sleep(1);
Application.ProcessMessages;
end;
This worked ok before the Laz/fpc update, but seems to be broken
now ? This is just my 'guess' so far as where my problem lies ?
After more study (read as: more google) - it may be related to the
kernel changes in Ubuntu 10.04 - seems to be many unrelated programs
suffering similar problems - will continue this story as I find more
:)
Could you please post some of those links? Is this an Ubuntu specific
kernel change?
Thanks,
Burkhard
http://ohioloco.ubuntuforums.org/showthread.php?p=8769812
http://forum.videolan.org/viewtopic.php?f=13&t=70320
These are just a quick sample of different complaints of same problem -
I think there is still no definitive reason found.
It would appear to be kernel specific ? -
If you search google (etc) for 'futex_wait_queue_me' errors, the list is
growing daily :)
--
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