diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/msg.h |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/linux/msg.h')
-rw-r--r-- | include/linux/msg.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/include/linux/msg.h b/include/linux/msg.h new file mode 100644 index 000000000000..2c4c6aa643ff --- /dev/null +++ b/include/linux/msg.h @@ -0,0 +1,96 @@ +#ifndef _LINUX_MSG_H +#define _LINUX_MSG_H + +#include <linux/ipc.h> +#include <linux/list.h> + +/* 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 <asm/msgbuf.h> + +/* 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__ + +/* one msg_msg structure for each message */ +struct msg_msg { + struct list_head m_list; + long m_type; + int m_ts; /* message text size */ + struct msg_msgseg* next; + void *security; + /* the actual message follows immediately */ +}; + +/* one msq_queue structure for each present queue on the system */ +struct msg_queue { + struct kern_ipc_perm q_perm; + time_t q_stime; /* last msgsnd time */ + time_t q_rtime; /* last msgrcv time */ + time_t q_ctime; /* last change time */ + unsigned long q_cbytes; /* current number of bytes on queue */ + unsigned long q_qnum; /* number of messages in queue */ + unsigned long q_qbytes; /* max number of bytes on queue */ + pid_t q_lspid; /* pid of last msgsnd */ + pid_t q_lrpid; /* last receive pid */ + + struct list_head q_messages; + struct list_head q_receivers; + struct list_head q_senders; +}; + +#endif /* __KERNEL__ */ + +#endif /* _LINUX_MSG_H */ |