The DECthreads C language header files shown in Table B-1 provide interface definitions for DECthreads APIs.
Header File           Interface
tis.h                 tis routines (tis_)
cma.h                 cma routines (cma_)
cma$def.h             cma routines (cma$)
pthread.h             POSIX 1003.1c-1995 routines
pthread_d4.h          POSIX 1003.4a Draft 4 routines with status-
                      returning interface
pthread_exc.h         POSIX 1003.4a Draft 4 routines with exception-
                      returning interface
Do not include more than one of the above header files in your module.