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Asked: 2026-05-13T07:21:58+00:00

I have an native C++ library which makes use of a large static buffer

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I have an native C++ library which makes use of a large static buffer (it acquires data from a device).

Let’s say this buffer is defined like this:

unsigned char LargeBuffer[1000000];

Now I would like to expose parts of this buffer to managed C++, e.g. when 1000 bytes of new data are stored by the library at LargeBuffer[5000] I would like to perform a callback into managed C++ code, passing a pointer to LargeBuffer[5000] so that managed C++ can access the 1000 bytes of data there (directly if possibile, i.e. without copying data, to achieve maximum performance).

What is the best way to let managed C++ code access data in this native array?

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1 Answer

  1. Editorial Team

    Managed C++ can access the unmanaged memory just fine. You can just pass in the pointer and use it in managed c++.

    Now, if you want to then pass that data into other .NET languages, you’ll need to copy that data over to managed memory structures or use unsafe code in C#

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