Struct msqid_ds

struct msqid_ds;

Description

The msqid_ds structure defines a message queue associated with a message queue ID. There is one queue per message queue ID. Collectively, the queues are stored as an array, with message queue IDs serving as an index into the array. Contains the following members,

Members

Defined in msqid_ds:

• msg_cbytesnumber of bytes in use on the queue
• msg_ctimetime of last msgctl(int,int,struct msqid_ds *)
• msg_lrpidpid of last msgrcv(int,void *,size_t,long,int)
• msg_lspidpid of last msgsnd(int,const void *,size_t,int)
• msg_permmsg queue permission bits
• msg_qbytesmax n of bytes on the queue
• msg_qnumnumber of msgs in the queue
• msg_rtimetime of last msgrcv(int,void *,size_t,long,int)
• msg_stimetime of last msgsnd(int,const void *,size_t,int)

ipc_perm msg_perm;

Description

msg queue permission bits

msglen_t msg_cbytes;

Description

number of bytes in use on the queue

msgqnum_t msg_qnum;

Description

number of msgs in the queue

msglen_t msg_qbytes;

Description

max n of bytes on the queue

pid_t msg_lspid;

Description

pid of last msgsnd(int,const void *,size_t,int)

pid_t msg_lrpid;

Description

pid of last msgrcv(int,void *,size_t,long,int)

time_t msg_stime;

Description

time of last msgsnd(int,const void *,size_t,int)

time_t msg_rtime;

Description

time of last msgrcv(int,void *,size_t,long,int)

time_t msg_ctime;

Description

time of last msgctl(int,int,struct msqid_ds *)