DLLs and Multithreading...

[SWilliams15]

Say I call a DLL function from VB. The DLL func then creates a worker thread. Does that worker thread get destroyed when the DLL is unloaded from memory? I'd say yes since it's running in the same address space. Could someone confirm this?

Thanks,
Sean.

 

[vkavith]

My guess would also be "yes". COnsider the scenario where u have a process with n threads. If u delete the process, then all the threads in the process will automatically be deleted.

Sriks

 

[palbano]

What if the process didn't end but just unloaded the DLL?

-pete

 

[chiph]

SWilliams -

If having the thread end when the DLL unloads is what you want, then I'd put code in the DLLMain function to detect this (look for DLL_THREAD_DETACH and DLL_PROCESS_DETACH).

Otherwise, I think the thread will continue running until the parent process ends.

Chip H.

 

[palbano]

I agree with Chip. Also ending threads when the process is going to continue can cause problems if not done correctly. Read the MSND Articles that discuss exiting threads.

-pete