ajpeck wrote:
> I am now trying a process and threads hybrid to get around the problem.
>
> We can hope that for Perl 6 a function can be added to threads for
> immediate termination of child threads and freeing resources immediately
> from the parent thread.
You may not be able to free all of the resources:
TerminateThread is used to cause a thread to exit. When this occurs,
the target thread has no chance to execute any user-mode code and its
initial stack is not deallocated. DLLs attached to the thread are not
notified that the thread is terminating.
TerminateThread is a dangerous function that should only be used in the
most extreme cases. You should call TerminateThread only if you know
exactly what the target thread is doing, and you control all of the
code that the target thread could possibly be running at the time of
the termination. For example, TerminateThread can result in the
following problems:
· If the target thread owns a critical section, the critical
section will not be released.
· If the target thread is executing certain kernel32 calls when
it is terminated, the kernel32 state for the thread's process could be
inconsistent.
· If the target thread is manipulating the global state of a
shared DLL, the state of the DLL could be destroyed, affecting other
users of the DLL.
A thread cannot protect itself against TerminateThread, other than by
controlling access to its handles. The thread handle returned by the
CreateThread and CreateProcess functions has THREAD_TERMINATE access,
so any caller holding one of these handles can terminate your thread.
If the target thread is the last thread of a process when this function
is called, the thread's process is also terminated.
The state of the thread object becomes signaled, releasing any other
threads that had been waiting for the thread to terminate. The thread's
termination status changes from STILL_ACTIVE to the value of the
dwExitCode parameter.
Terminating a thread does not necessarily remove the thread object from
the system. A thread object is deleted when the last thread handle is
closed.
--
,-/- __ _ _ $Bill Luebkert Mailto:[EMAIL PROTECTED]
(_/ / ) // // DBE Collectibles Mailto:[EMAIL PROTECTED]
/ ) /--< o // // Castle of Medieval Myth & Magic http://www.todbe.com/
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