On 11/24/2011 08:44 AM, Hans-Peter Diettrich wrote:
While the WinAPI sends window messages to the thread, that created
(owns) the window, LCLIntf docs say that all messages go to the
application message loop.
AFIK, in Windows, it is possible to create (or just use ? ) an Event
Queue (aka "message loop") for worker threads. This is not supported by
the LCL (nor the Delphi VCL) as the LCL and VCL code is done in a
non-reenrant way (supposedly for performance purpose). So this
Windows-supported feature can't be used. With non-Windows
LCLWidgetTypes, the EventQueue is done "manually" in the appropriate
WidgetType related files of the LCL. But here (of course) again only a
single EventQueue (for the main thread) is supported. In theory you
could create another TApplication object to create another Event queue,
but for sure this will crash because of non-reentrancy issues.
-Michael
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