We are using the ICS in an application that emails various entities (not
spam). Recently, we ran into an issue where the application would not shut
down properly. On some systems it simply persists and on others it reports
that an error occurred and it needs to close. This is after it has
completed all of its functions. I traced into it and found the Finalization
section of OverbyteICSWSocket was executing before the
TComponent.DestroyComponent. The Finalization section calls
DeleteCriticalSection(SslCritSect). TComponent.DestroyComponent calls the
destructor of all its components. Those destructors ultimately call
UnloadSsl and this method uses EnterCriticalSection(SslCritSect) and
LeaveCriticalSection(SslCritSect), which causes an access violation and
prevents the app from closing.
This problem has only been seen recently; prior versions of this app with
this version of the ICS, the exact same components with the exact same
properties, and only slight modification to the code do not hang like this.
First, is executing the Finalization before calling the component's
destructor the *normal* order? Is there some way to control this order?
Second, has anyone else seen this issue? Is there any way to *fix* this
short of removing the use of the SslCritSect in UnloadSsl?
Thanks in advance for any help.


*John Reid*

*Software Development Manager*
6415 South 3000 East
Suite 150
Salt Lake City, UT  84121
Phone: 801.305.3995
Fax: 801.521.6222

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