Does anyone have a description for RtlpWaitForCriticalSection and ..UnWait...

[David . Goodenough]

I have an application which seems to want these two Rtlp functions from
ntdll, but they are not defined in the Win32 SDK HLP file and are define as
BUILTIN32_Unimplemented in ntdll.spec..  If someone has the interface
definitions and possibly a description of what they do I would like to try
to implement them.

Thank you in advance

David