taitken

I would be interested in this functionality as well. Generally, the ability to convert a path between relative and absolute representations would be helpful.

I believe this is related to some warnings I'm getting from VisualStudio: ``` 2>vcpkg\installed\x64-windows\include\cppfs/FilePath.h(348,23): warning C4251: 'cppfs::FilePath::m_path': class 'std::basic_string' needs to have dll-interface to be used by clients of class...

To clarify, the issue is that it seems to be possible for `tryWait` to return `false` while the semaphore is positive because CAS could fail from a `signal()` in another...