#ifndef _LINUX_MSG_H #define _LINUX_MSG_H #include /* ipcs ctl commands */ #define MSG_STAT 11 #define MSG_INFO 12 /* msgrcv options */ #define MSG_NOERROR 010000 /* no error if message is too big */ #define MSG_EXCEPT 020000 /* recv any msg except of specified type.*/ /* Obsolete, used only for backwards compatibility and libc5 compiles */ struct msqid_ds { struct ipc_perm msg_perm; struct msg *msg_first; /* first message on queue,unused */ struct msg *msg_last; /* last message in queue,unused */ __kernel_time_t msg_stime; /* last msgsnd time */ __kernel_time_t msg_rtime; /* last msgrcv time */ __kernel_time_t msg_ctime; /* last change time */ unsigned long msg_lcbytes; /* Reuse junk fields for 32 bit */ unsigned long msg_lqbytes; /* ditto */ unsigned short msg_cbytes; /* current number of bytes on queue */ unsigned short msg_qnum; /* number of messages in queue */ unsigned short msg_qbytes; /* max number of bytes on queue */ __kernel_ipc_pid_t msg_lspid; /* pid of last msgsnd */ __kernel_ipc_pid_t msg_lrpid; /* last receive pid */ }; /* Include the definition of msqid64_ds */ #include /* message buffer for msgsnd and msgrcv calls */ struct msgbuf { long mtype; /* type of message */ char mtext[1]; /* message text */ }; /* buffer for msgctl calls IPC_INFO, MSG_INFO */ struct msginfo { int msgpool; int msgmap; int msgmax; int msgmnb; int msgmni; int msgssz; int msgtql; unsigned short msgseg; }; #define MSGMNI 16 /* <= IPCMNI */ /* max # of msg queue identifiers */ #define MSGMAX 8192 /* <= INT_MAX */ /* max size of message (bytes) */ #define MSGMNB 16384 /* <= INT_MAX */ /* default max size of a message queue */ /* unused */ #define MSGPOOL (MSGMNI*MSGMNB/1024) /* size in kilobytes of message pool */ #define MSGTQL MSGMNB /* number of system message headers */ #define MSGMAP MSGMNB /* number of entries in message map */ #define MSGSSZ 16 /* message segment size */ #define __MSGSEG ((MSGPOOL*1024)/ MSGSSZ) /* max no. of segments */ #define MSGSEG (__MSGSEG <= 0xffff ? __MSGSEG : 0xffff) #ifdef __KERNEL__ asmlinkage long sys_msgget (key_t key, int msgflg); asmlinkage long sys_msgsnd (int msqid, struct msgbuf *msgp, size_t msgsz, int msgflg); asmlinkage long sys_msgrcv (int msqid, struct msgbuf *msgp, size_t msgsz, long msgtyp, int msgflg); asmlinkage long sys_msgctl (int msqid, int cmd, struct msqid_ds *buf); /* MSGQ_POLL_SUPPORT */ asmlinkage long sys_msgqToFd(long msqid); /* end of MSGQ_POLL_SUPPORT */ #endif /* __KERNEL__ */ #endif /* _LINUX_MSG_H */