#ifndef _SYS_MSG_H #define _SYS_MSG_H #include #include #include extern int msgctl (int msqid, int cmd, struct msqid_ds *buf) __THROW; extern int msgget (key_t key, int msgflg) __THROW; extern int msgrcv (int msqid, void *msgp, size_t msgsz, long int msgtyp, int msgflg) __THROW; extern int msgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg) __THROW; #endif