Here is a list of all macros with links to the files they belong to:

_is_other_mutex : TMCAutoLock.h
_is_recur_mutex : TMCAutoLock.h
_is_stand_mutex : TMCAutoLock.h
gMC : TVirtualMC.h
TMCMULTITHREADED : TMCAutoLock.h
TMCMUTEX_INITIALIZER : TMCAutoLock.h
TMCMUTEXLOCK : TMCAutoLock.h
TMCMUTEXUNLOCK : TMCAutoLock.h
VMC_MULTITHREADED : TMCtls.h
VMC_RELEASE : TMCVersion.h
VMC_RELEASE_DATE : TMCVersion.h