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Editorial Team
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Asked: 2026-06-14T06:54:00+00:00

I have a function that creates a bunch of local variables, then passes their

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I have a function that creates a bunch of local variables, then passes their addresses to a function that runs in a separate thread – something like this: 

void MyFunction()
{
    MyClass a;
    AnotherClass b;
    ...
    FinalClass z;

    CallFunctionInNewThread(&a,&b,&c,...,&z);
}

Of course, these variables are destroyed when the MyFunction goes out of scope (so the function in a thread is now pointing to garbage), so this setup doesn’t work. What are my options here? If I allocate the variables on the heap with ‘new’, I will never get a chance to delete them. If I make them smart pointers or similar, I’d have to make the threaded function accept them as smart pointers, or their reference count will not be increased so they will still get destroyed immediately. It seems like they kind of want to be member variables of a wrapper class of MyFunction, but there are a few hundred lines and tens of these things and that would just be crazy messy. Are there any other choices?

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1 Answer

  1. Editorial Team

    Are there any other choices?

    Simply copy (if trivial) or move/swap the data (if heavy to create) — similar to transferring ownership from one thread to the other. Seems Thread A really does not need a reference from the description. Bonus: This removes concurrent access complexities from your program.

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