sysv shm/sem

I am writing a Win32 DLL implementation of :

int     semget(key_t key, int nsems, int semflg);
int     semctl(int semid, int semnum, int cmd, union semun arg);
int     semop(int semid, struct sembuf * sops, unsigned nsops);
int     shmctl(int shmid, int cmd, struct shmid_ds *buf);
int     shmget(key_t key, int size, int shmflg);
void *  shmat(int shmid, const void *shmaddr, int shmfl);
int     shmdt(const void *shmaddr);

I will donate it do PostgreSQL.

UNIX permissions will be ignored, i.e. uig/gid will be 0
Do you see any need for the msgxxx calls?
Is the function ipc() ever used?

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