A simple example of how to use the win32 ProcessSnapshot APIs to get a list
of open file handles in the current process.
Finding leaked file handles can be extremely challenging on Windows. The best approaches I'd found online were, roughly speaking, to run Sysinternals Handle a bunch of times.
Especially in high-level languages like Python, the best approach to tracking down the source of a leaked handle can really be just to see a list of open handles before and after some action.
I stumbled across this API via a random comment squirreled away on a StackOverflow post that I'm never going to be able to find again, and whipped up a quick PoC that it does what I wanted. And that's how this repo came to be.
The one and only important function for consumers is
get_cur_proc_handle_paths. This returns a vector of std::wstring containing
best-effort paths for the open file handles within the current process.
See examples/simple.cpp for a simple usage example.
This really shouldn't be regarded as a complete library--it's more akin to a snippet. It can be incorporated into your project through a simple copy/paste.
It should hopefully be fairly simple to create wrappers for any language with a good FFI. I may add examples of this in the future, too.
This code uses C++17 features, most notable std::string_view. If you require
compatibility with an earlier version of C++, removing this should get you most
of the way there.