The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

  • My badges

  • Twitter Updates

  • My Flickr Stream

  • Pages

  • All categories

  • Enter your email address to subscribe to this blog and receive notifications of new posts by email.

    Join 1,925 other followers

Delphi multithreading and DLL exports: watch your exceptions (via: Stack Overflow)

Posted by jpluimers on 2014/06/03

Talking about Danny Thorpe: he also posted a nice hint on threading methods for ancient Delphi versions that equally applies to DLL exports in any Delphi version, even any programming environment.

Recently, I had to do some surgery in such a Pre-Delphi 6 application, and I was really happy to remember this answer: it instantly solved some process crashes, and the added logging allowed for investigating the actual cause.

Note that this tip isn’t just a good advice for old Delphi versions.

Even in younger Delphi versions, you have to watch methods that can be called from outside a regular Delphi context, for instance exported methods.

Heck, it applies to virtually any development environment: exceptions usually are very specific to that environment and should never cross a process boundary.


Take the approach below

  • for Execute methods in your own thread classes in Delphi 5 or earlier
  • for any method that can be called externally (like DLL exports)
procedure ThreadExecuteOrDllExport(...);
    on e: Exception do
      // output or log this error somewhere.


via: multithreading – Program shutdown on Synchronize – Stack Overflow.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: