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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [include/] [linux/] [msg.h] - Rev 901
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#ifndef _LINUX_MSG_H #define _LINUX_MSG_H #include <linux/ipc.h> /* msgrcv options */ #define MSG_NOERROR 010000 /* no error if message is too big */ #define MSG_EXCEPT 020000 /* recv any msg except of specified type.*/ /* one msqid structure for each queue on the system */ struct msqid_ds { struct ipc_perm msg_perm; struct msg *msg_first; /* first message on queue */ struct msg *msg_last; /* last message in queue */ time_t msg_stime; /* last msgsnd time */ time_t msg_rtime; /* last msgrcv time */ time_t msg_ctime; /* last change time */ struct wait_queue *wwait; struct wait_queue *rwait; ushort msg_cbytes; /* current number of bytes on queue */ ushort msg_qnum; /* number of messages in queue */ ushort msg_qbytes; /* max number of bytes on queue */ ushort msg_lspid; /* pid of last msgsnd */ ushort msg_lrpid; /* last receive pid */ }; /* 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; ushort msgseg; }; #define MSGMNI 128 /* <= 1K */ /* max # of msg queue identifiers */ #define MSGMAX 4056 /* <= 4056 */ /* max size of message (bytes) */ #define MSGMNB 16384 /* ? */ /* 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__ /* one msg structure for each message */ struct msg { struct msg *msg_next; /* next message on queue */ long msg_type; char *msg_spot; /* message text address */ time_t msg_stime; /* msgsnd time */ short msg_ts; /* message text size */ }; /* ipcs ctl commands */ #define MSG_STAT 11 #define MSG_INFO 12 asmlinkage int sys_msgget (key_t key, int msgflg); asmlinkage int sys_msgsnd (int msqid, struct msgbuf *msgp, size_t msgsz, int msgflg); asmlinkage int sys_msgrcv (int msqid, struct msgbuf *msgp, size_t msgsz, long msgtyp, int msgflg); asmlinkage int sys_msgctl (int msqid, int cmd, struct msqid_ds *buf); #endif /* __KERNEL__ */ #endif /* _LINUX_MSG_H */
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