[Lazarus] How to PostMessage to object?

[Henry Vermaak]

On 09/06/11 12:00, Mattias Gaertner wrote:
>
>
> Henry Vermaak <henry.vermaak at gmail.com> hat am 9. Juni 2011 um 12:12
> geschrieben:
>
>  > On 09/06/11 11:01, Mattias Gaertner wrote:
>  > >
>  > >
>  > > Michael Schnell <mschnell at lumino.de> hat am 9. Juni 2011 um 11:46
>  > > geschrieben:
>  > >
>  > > > On 06/09/2011 10:58 AM, Henry Vermaak wrote:
>  > > > > You will corrupt the linked list that QueueAsyncCall() uses
> when you
>  > > > > call it from multiple threads, so you _must_ protect it.
>  > > > As QueueAsyncCall is specified exactly for this use, it needs to take
>  > > > care of this issue internally. Otherwise it obviously is buggy. I
> trust
>  > > > that the LCL developers did a decent job.
>  > >
>  > > The only "specification" I found for TApplication.QueueAsyncCall is the
>  > > fpdoc entry:
>  > >
>  > > Insert a given asynchronous call into the queue
>  > >
>  > > Why do you think it is thread safe?
>  >
>  > Do you propose that QueueAsyncCall throws an exception if it's used from
>  > outside the main thread? Otherwise adding a critical section to all the
>  > async queue methods is in order.
>
> I made it thread safe. Please test.

In TApplication.Destroy there is another call to ProcessAsyncCallQueue 
further down (line 170).  System.DoneCriticalSection(FAsyncCall.CritSec) 
needs to be moved after it.

Henry