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dllc++14clrunmanagedmanaged

Wait for a thread inside a C++ static object

I have a static object that needs to initialize an imaging API. The allocated resources of this imaging API need to be released by the same thread.
So I'm starting a thread in my static object that initializes everything and then waits for a counter to reach zero. When this happens the thread cleans all up and finishes.

This is an unmanaged class inside a managed library, so I can't use System::Threading::Thread (needs a managed static member function) or std::thread (compiler error, not supported with /clr).

So I have to start my thread like:

CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)&Initialize, this, 0, 0);

All works fine, the init is done and the API functions work. But when I close the application I see that the usage counter of my static object reaches zero but the clean up function is never called by the thread, as if the thread was killed. Is there a way to make sure the thread will continue to exist and execute until its end?

Solution

  • After turning this around in all possible ways and adding events etc I guess this is not possible so I'll have to change the structure of my code and encapsulate the non managed class inside a managed class, and add the thread to the managed class.