Method AwaitFileSystemOperationAwaiter

Libraries/Await/Await.cpp:2204–2210

#if SC_PLATFORM_WINDOWS
    operationResult = Result::Error("Await filePoll is not supported on Windows");
    return false;
#else
    request.callback = [this](AsyncFileReadiness::Result& result)
    {
        operationResult = result.isValid();
        continuation.resume();
    };

    FileDescriptor::Handle handle = FileDescriptor::Invalid;
    operationResult               = file.get(handle, Result::Error("Await filePoll invalid file"));