On Wed, 30 Sep 2015, Susie Nicol wrote:
Hi
I have an application with a main form, and several others whuich are only
ever used in modal form.
The application is slow to terminate, and I cannot see why. The shutdown
procedure, simplified a little looks like this: (datamodified a global
Boolean; savedata another procedure in the same unit; the SQLcomponents are
in a a data module)
procedure FinishUp;
begin
if datamodified then
savedata;
sqltransaction1.commit;
sqlconnection.close(True);
Application.Terminate {line A}
end;
The debugger shows me that everything is fine until line A, when the
program hangs: often for 15 seconds, sometimes for ever.
XFCE on Linux complains that the window containing the main form cannot be
closed because 'the application may be busy'.
I have tried to replace line A with 'halt' or 'close' without any
difference. The connection to the database is indeed closed.
1. Are you using threads ?
2. Do you create a lot of components dynamically that are freed in the
destructor of the form ?
Both can cause significant delays.
I am using Lazarus 1.4.2, 64-bit, Linux XFCE desktop, GTK+2 widget set.
Any suggestions about where to look next will be very welcome.
What I usually do in such case is not use the debugger, but check using the strace
command-line utility if there is still some activity in the application:
Put a writeln('something') before and after the Application.Terminate,
and check what happens between the write() commands in strace's output.
Michael.
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