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Editorial Team
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Asked: 2026-05-12T16:06:01+00:00

Is there a way to get a notification that a thread no longer runs

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Is there a way to get a notification that a thread no longer runs (has returned) in your application?
I know this is possible in kernel mode (using PsSetCreateThreadNotifyRoutine), but is there a way to know this from user mode, using only Win32 API ?

The problem is that I can’t control the code in the thread, because my module is part of a library. Making a driver to monitor the system would not be too hard, but it’s annoying for the users to install a driver even for a basic application that uses my library.

My code uses TLS storage, and under Linux/Unix pthread_key_create can take a pointer to a function that is called when the thread is destroyed. But TlsAlloc (Windows) has nothing like this…

Thanks in advance!

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1 Answer

  1. Editorial Team

    Depends on what kind of libraray you have. For a DLL could handle the thread termination in your DllMain (DLL_THREAD_DETACH). The MSDN states that this is the best place to deal with TLS Resources.

    Keep in mind that this callback is only calld for a thread exiting cleanly (not by e.g TerminateThread()).

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