| #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 msg structure for each message */ |
| struct msg { |
| struct msg *msg_next; /* next message on queue */ |
| long msg_type; |
| char *msg_spot; /* message text address */ |
| short msg_ts; /* message text size */ |
| }; |
| |
| /* 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 */ |
| }; |
| |
| |
| 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 4080 /* <= 4080 */ /* 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 */ |
| |
| #ifdef __KERNEL__ |
| |
| /* ipcs ctl commands */ |
| #define MSG_STAT 11 |
| #define MSG_INFO 12 |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _LINUX_MSG_H */ |