TThread.FreeOnTerminate

Indicates whether the thread should free itself when it stops executing.

Declaration

Source position: classesh.inc line 2397

Description

FreeOnTerminate, when set to True indicates that the tread instance will freed automatically as soon as the thread stops executing. You can use the OnTerminate property to get a notification of when the thread has terminated and will be freed.

When setting this property to True, in general you may not read or write any property of the TThread instance from a different thread, because there is no guarantee that the thread instance still exists in memory. This implies 2 things:

1. The OnTerminate event handler should be set before setting FreeOnTerminate to True
2. The properties can still be read and set in the OnTerminate event handler, as the thread instance is then still guaranteed to exist.

If FreeOnTerminate is set to False, to stop and delete a running thread from another thread, the following sample code can be used:

aThread.Terminate;
aThread.WaitFor;
FreeAndNil(aThread);

See also