<mutex>: std::mutex not declared when included from C++/CLI

[Chronial]

std::mutex is not declared by <mutex> when the header is included from C++/CLI.

I assume the reason for this is that the implementation is somehow incompatible with C++/CLI? Could this maybe be fixed by using #pragma managed(push, off) around problematic parts?

Even if this is not possible, the current solution has unfortunate side effects: We have a header that defines a C++ class that has a std::mutex as its member. Even though all interactions with that member are implemented in native code, C++/CLI code not interact with this class because the header doesn't compile under C++/CLI.

See also #838

Workaround: std::shared_mutex is available under C++/CLI.

[Chronial]

Related: #955: <execution>: Including with /clr enabled results in compiler error.

[NorbertNemec]

I just stumbled over the same issue. @StephanTLavavej could you please clarify - is this a bug expected to be fixed by providing std::mutex when building with /clr? According to an old post from 2014 https://stackoverflow.com/questions/26585714/error-mutex-is-not-supported-when-compiling-with-clr-or-clrpure there used to be something more fundamental behind this. Has that been resolved meanwhile?

[NorbertNemec]

Following #838 I realized that I can easily work around this by using shared_mutex, so it is not a pressing matter for me after all.