assign none to COM thread model

This is a discussion on assign none to COM thread model within the Windows Programming forums, part of the Platform Specific Boards category; Hello everyone, As mentioned in the book ATL Internals, when assign none to COM thread model, -------------------- If there is ...

  1. #1
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    assign none to COM thread model

    Hello everyone,


    As mentioned in the book ATL Internals, when assign none to COM thread model,

    --------------------
    If there is no ThreadingModel given in the registry, COM will assume a legacy single-threaded class and access the class object from the process's first STA, creating a new STA is necessary. This protects objects from having to synchronize access to global, static, or instance data.
    --------------------

    I do not understand why "This protects objects from having to synchronize access to global, static, or instance data"? Any ideas?


    thanks in advance,
    George

  2. #2
    Algorithm Dissector iMalc's Avatar
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    If all those objects live in the same STA then they all execute in the same thread, meaning that there are no threading synchronisation issues to worry about.
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    Thanks iMalc,


    Question answered.

    Quote Originally Posted by iMalc View Post
    If all those objects live in the same STA then they all execute in the same thread, meaning that there are no threading synchronisation issues to worry about.

    regards,
    George

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