SYS$SETEF (OpenVMS) SYS$SETEF (OpenVMS)
NAME
semctl - perform semaphore control operations
SYS$SETEF - Set event flag
EXPLAINATION
The Digital UNIX semctl system call is similar to the OpenVMS SYS$SETEF
system service in that they can both set the value of a process syn‐
chronization variable. The semctl function allows a semaphore value to
be explicitly set by passing IPC_SET as the command argument (third
argument). To indicate that a resource has been taken, this value will
typically be set to 0. This is useful to initialize a semaphore; how‐
ever, when obtaining resources it is suggested that the semop function
be used instead.
RELATED INFORMATION
Digital UNIX Functions:
semop(2), semget(2), semctl(2) delim off
SYS$SETEF (OpenVMS)
