| 1 | #ifndef _LINUX_MSG_H |
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| 2 | #define _LINUX_MSG_H |
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| 3 | |
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| 4 | #include <linux/ipc.h> |
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| 5 | |
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| 6 | /* ipcs ctl commands */ |
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| 7 | #define MSG_STAT 11 |
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| 8 | #define MSG_INFO 12 |
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| 9 | |
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| 10 | /* msgrcv options */ |
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| 11 | #define MSG_NOERROR 010000 /* no error if message is too big */ |
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| 12 | #define MSG_EXCEPT 020000 /* recv any msg except of specified type.*/ |
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| 13 | |
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| 14 | /* Obsolete, used only for backwards compatibility and libc5 compiles */ |
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| 15 | struct msqid_ds { |
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| 16 | struct ipc_perm msg_perm; |
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| 17 | struct msg *msg_first; /* first message on queue,unused */ |
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| 18 | struct msg *msg_last; /* last message in queue,unused */ |
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| 19 | __kernel_time_t msg_stime; /* last msgsnd time */ |
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| 20 | __kernel_time_t msg_rtime; /* last msgrcv time */ |
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| 21 | __kernel_time_t msg_ctime; /* last change time */ |
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| 22 | unsigned long msg_lcbytes; /* Reuse junk fields for 32 bit */ |
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| 23 | unsigned long msg_lqbytes; /* ditto */ |
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| 24 | unsigned short msg_cbytes; /* current number of bytes on queue */ |
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| 25 | unsigned short msg_qnum; /* number of messages in queue */ |
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| 26 | unsigned short msg_qbytes; /* max number of bytes on queue */ |
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| 27 | __kernel_ipc_pid_t msg_lspid; /* pid of last msgsnd */ |
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| 28 | __kernel_ipc_pid_t msg_lrpid; /* last receive pid */ |
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| 29 | }; |
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| 30 | |
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| 31 | /* Include the definition of msqid64_ds */ |
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| 32 | #include <asm/msgbuf.h> |
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| 33 | |
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| 34 | /* message buffer for msgsnd and msgrcv calls */ |
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| 35 | struct msgbuf { |
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| 36 | long mtype; /* type of message */ |
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| 37 | char mtext[1]; /* message text */ |
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| 38 | }; |
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| 39 | |
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| 40 | /* buffer for msgctl calls IPC_INFO, MSG_INFO */ |
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| 41 | struct msginfo { |
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| 42 | int msgpool; |
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| 43 | int msgmap; |
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| 44 | int msgmax; |
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| 45 | int msgmnb; |
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| 46 | int msgmni; |
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| 47 | int msgssz; |
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| 48 | int msgtql; |
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| 49 | unsigned short msgseg; |
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| 50 | }; |
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| 51 | |
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| 52 | #define MSGMNI 16 /* <= IPCMNI */ /* max # of msg queue identifiers */ |
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| 53 | #define MSGMAX 8192 /* <= INT_MAX */ /* max size of message (bytes) */ |
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| 54 | #define MSGMNB 16384 /* <= INT_MAX */ /* default max size of a message queue */ |
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| 55 | |
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| 56 | /* unused */ |
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| 57 | #define MSGPOOL (MSGMNI*MSGMNB/1024) /* size in kilobytes of message pool */ |
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| 58 | #define MSGTQL MSGMNB /* number of system message headers */ |
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| 59 | #define MSGMAP MSGMNB /* number of entries in message map */ |
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| 60 | #define MSGSSZ 16 /* message segment size */ |
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| 61 | #define __MSGSEG ((MSGPOOL*1024)/ MSGSSZ) /* max no. of segments */ |
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| 62 | #define MSGSEG (__MSGSEG <= 0xffff ? __MSGSEG : 0xffff) |
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| 63 | |
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| 64 | #endif /* _LINUX_MSG_H */ |
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