Am 16.09.2013 13:22, schrieb Marco van de Voort:
Did I understand you correctly that there is a "notifying" procedure,
that is called by the Event queuing mechanism each time an event is
pushed onto the queue ?
That was not me, but Sven or sb else. But as I understood it, the queue
method does that internally(thus platform dependent). He never said it was a
public option. You trigger it by queue()ing or synchronize()ing.
I did not say it explicitely, but meant it that way. See WakeMainThread
( http://www.freepascal.org/docs-html/rtl/classes/wakemainthread.html ).
This procedure then would potentially be called from Worker threads and
thus here, we need use the OS to schedule the (later to be done) queue
poll by the main thread via checksynchronize().
No. The mainthread simply should always loop around checksynchronize while
idle. Checksynchronize is the delay in the event loop so to say, by blocking
on some internal event. Thus if something is queued, the event is triggered
and the mainthread will wake up immediately (if it was indeed blocked on
checksynchronize)
WakeMainThread is used by the LCL to initiate an idle-event (whatever an
"event" is for the underlying widgetset) so that CheckSynchronize gets
executed.
Regards,
Sven
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