If I call MainForm->ControlList1->Invalidate() from a TIdUDPServer::>OnUDPRead event, is it thread safe, or do I still need to use TThread::Synchronize() or TThread::Queue()?

If I call MainForm->ControlList1->Invalidate() from a TIdUDPServer::>OnUDPRead event, is it thread safe, or do I still need to use TThread::Synchronize() or TThread::Queue()?

• c++builder
• indy
• vcl
• c++builder-12-athens

Share Follow edited Mar 3 at 22:48 Remy Lebeau 601k3636 gold badges508508 silver badges851851 bronze badges asked Mar 3 at 22:43 JKofskyJKofsky 14388 bronze badges

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1 Answer 1

Sorted by: Reset to default 1

The TIdUDPServer::OnUDPRead event is synchronized by default, so any code you put inside of that event handler will be thread-safe as far as UI access is concerned.

You can disable that synchronization by setting the TIdUDPServer::ThreadedEvent property to true.