| 1 |
62 |
marcus.erl |
#ifndef _LINUX_MSG_H
|
| 2 |
|
|
#define _LINUX_MSG_H
|
| 3 |
|
|
|
| 4 |
|
|
#include <linux/ipc.h>
|
| 5 |
|
|
|
| 6 |
|
|
/* ipcs ctl commands */
|
| 7 |
|
|
#define MSG_STAT 11
|
| 8 |
|
|
#define MSG_INFO 12
|
| 9 |
|
|
|
| 10 |
|
|
/* msgrcv options */
|
| 11 |
|
|
#define MSG_NOERROR 010000 /* no error if message is too big */
|
| 12 |
|
|
#define MSG_EXCEPT 020000 /* recv any msg except of specified type.*/
|
| 13 |
|
|
|
| 14 |
|
|
/* Obsolete, used only for backwards compatibility and libc5 compiles */
|
| 15 |
|
|
struct msqid_ds {
|
| 16 |
|
|
struct ipc_perm msg_perm;
|
| 17 |
|
|
struct msg *msg_first; /* first message on queue,unused */
|
| 18 |
|
|
struct msg *msg_last; /* last message in queue,unused */
|
| 19 |
|
|
__kernel_time_t msg_stime; /* last msgsnd time */
|
| 20 |
|
|
__kernel_time_t msg_rtime; /* last msgrcv time */
|
| 21 |
|
|
__kernel_time_t msg_ctime; /* last change time */
|
| 22 |
|
|
unsigned long msg_lcbytes; /* Reuse junk fields for 32 bit */
|
| 23 |
|
|
unsigned long msg_lqbytes; /* ditto */
|
| 24 |
|
|
unsigned short msg_cbytes; /* current number of bytes on queue */
|
| 25 |
|
|
unsigned short msg_qnum; /* number of messages in queue */
|
| 26 |
|
|
unsigned short msg_qbytes; /* max number of bytes on queue */
|
| 27 |
|
|
__kernel_ipc_pid_t msg_lspid; /* pid of last msgsnd */
|
| 28 |
|
|
__kernel_ipc_pid_t msg_lrpid; /* last receive pid */
|
| 29 |
|
|
};
|
| 30 |
|
|
|
| 31 |
|
|
/* Include the definition of msqid64_ds */
|
| 32 |
|
|
#include <asm/msgbuf.h>
|
| 33 |
|
|
|
| 34 |
|
|
/* message buffer for msgsnd and msgrcv calls */
|
| 35 |
|
|
struct msgbuf {
|
| 36 |
|
|
long mtype; /* type of message */
|
| 37 |
|
|
char mtext[1]; /* message text */
|
| 38 |
|
|
};
|
| 39 |
|
|
|
| 40 |
|
|
/* buffer for msgctl calls IPC_INFO, MSG_INFO */
|
| 41 |
|
|
struct msginfo {
|
| 42 |
|
|
int msgpool;
|
| 43 |
|
|
int msgmap;
|
| 44 |
|
|
int msgmax;
|
| 45 |
|
|
int msgmnb;
|
| 46 |
|
|
int msgmni;
|
| 47 |
|
|
int msgssz;
|
| 48 |
|
|
int msgtql;
|
| 49 |
|
|
unsigned short msgseg;
|
| 50 |
|
|
};
|
| 51 |
|
|
|
| 52 |
|
|
#define MSGMNI 16 /* <= IPCMNI */ /* max # of msg queue identifiers */
|
| 53 |
|
|
#define MSGMAX 8192 /* <= INT_MAX */ /* max size of message (bytes) */
|
| 54 |
|
|
#define MSGMNB 16384 /* <= INT_MAX */ /* default max size of a message queue */
|
| 55 |
|
|
|
| 56 |
|
|
/* unused */
|
| 57 |
|
|
#define MSGPOOL (MSGMNI*MSGMNB/1024) /* size in kilobytes of message pool */
|
| 58 |
|
|
#define MSGTQL MSGMNB /* number of system message headers */
|
| 59 |
|
|
#define MSGMAP MSGMNB /* number of entries in message map */
|
| 60 |
|
|
#define MSGSSZ 16 /* message segment size */
|
| 61 |
|
|
#define __MSGSEG ((MSGPOOL*1024)/ MSGSSZ) /* max no. of segments */
|
| 62 |
|
|
#define MSGSEG (__MSGSEG <= 0xffff ? __MSGSEG : 0xffff)
|
| 63 |
|
|
|
| 64 |
|
|
#ifdef __KERNEL__
|
| 65 |
|
|
#include <linux/list.h>
|
| 66 |
|
|
|
| 67 |
|
|
/* one msg_msg structure for each message */
|
| 68 |
|
|
struct msg_msg {
|
| 69 |
|
|
struct list_head m_list;
|
| 70 |
|
|
long m_type;
|
| 71 |
|
|
int m_ts; /* message text size */
|
| 72 |
|
|
struct msg_msgseg* next;
|
| 73 |
|
|
void *security;
|
| 74 |
|
|
/* the actual message follows immediately */
|
| 75 |
|
|
};
|
| 76 |
|
|
|
| 77 |
|
|
/* one msq_queue structure for each present queue on the system */
|
| 78 |
|
|
struct msg_queue {
|
| 79 |
|
|
struct kern_ipc_perm q_perm;
|
| 80 |
|
|
time_t q_stime; /* last msgsnd time */
|
| 81 |
|
|
time_t q_rtime; /* last msgrcv time */
|
| 82 |
|
|
time_t q_ctime; /* last change time */
|
| 83 |
|
|
unsigned long q_cbytes; /* current number of bytes on queue */
|
| 84 |
|
|
unsigned long q_qnum; /* number of messages in queue */
|
| 85 |
|
|
unsigned long q_qbytes; /* max number of bytes on queue */
|
| 86 |
|
|
pid_t q_lspid; /* pid of last msgsnd */
|
| 87 |
|
|
pid_t q_lrpid; /* last receive pid */
|
| 88 |
|
|
|
| 89 |
|
|
struct list_head q_messages;
|
| 90 |
|
|
struct list_head q_receivers;
|
| 91 |
|
|
struct list_head q_senders;
|
| 92 |
|
|
};
|
| 93 |
|
|
|
| 94 |
|
|
/* Helper routines for sys_msgsnd and sys_msgrcv */
|
| 95 |
|
|
extern long do_msgsnd(int msqid, long mtype, void __user *mtext,
|
| 96 |
|
|
size_t msgsz, int msgflg);
|
| 97 |
|
|
extern long do_msgrcv(int msqid, long *pmtype, void __user *mtext,
|
| 98 |
|
|
size_t msgsz, long msgtyp, int msgflg);
|
| 99 |
|
|
|
| 100 |
|
|
#endif /* __KERNEL__ */
|
| 101 |
|
|
|
| 102 |
|
|
#endif /* _LINUX_MSG_H */
|
