Threadlist's locklist function hangs my program
When attempting to reset my thread manager by looping through the threadlist object that may have pointers to thread objects, my program hangs. When I set a breakpoint on Threadlist, it comes back as not nil. When I check Locklist it hangs the debugger. At runtime it hangs the program.
if ThreadList.LockList.Count > 0 then begin
Is there a way to check at runtime to avoid this? It is not an error since my try/except handler is never invoked. It seems like the function is waiting indefinitely for the Locklist function to return.
if ThreadList.LockList.Count > 0 then begin
Is there a way to check at runtime to avoid this? It is not an error since my try/except handler is never invoked. It seems like the function is waiting indefinitely for the Locklist function to return.
ASKER
I tried calling UnlockList prior to iterating through the list but it did not change the situation. Maybe I should give you a little context to go along with my question. My threaded list works inside an ActiveForm application used in Internet Explorer 7. I have an htm file that calls the ActiveX form. Works like a charm. Never fails. However when called from an aspx application it fails in the same spot, when calling locklist. I am not sure why there would be a difference. Thoughts?
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ASKER
Thank you.
http://msdn.microsoft.com/en-us/library/ms682608(VS.85).aspx
The pitfalls include:
EXCEPTION_POSSIBLE_DEADLOC
Exceptions that are not intended to be handled
code blocking behavior
(to name a few)
It looks to me like descending a new class from TThreadList would allow you to add a method that would let you wrapper TryEnterCriticalSection so you could get a true or false on whether or not it worked (instead of blocking your code).