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UNIX for Advanced & Expert Users
Performance calculation for Message Queues
Post 302617213 by jim mcnamara on Monday 2nd of April 2012 08:39:50 AM
04-02-2012
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#include <sys/ipc.h>
#include <sys/msg.h>
int main()
{
int qid;
int t;
struct msgbuf mesg;
qid=msgget(IPC_PRIVATE,IPC_CREAT);
mesg.mtype=1L;
mesg.mtext=1;
t=msgsnd(qid,&mesg,1,0);
printf("%d",t);
}
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LEARN ABOUT PHP
msg_stat_queue
MSG_STAT_QUEUE(3) 1 MSG_STAT_QUEUE(3) msg_stat_queue - Returns information from the message queue data structure SYNOPSIS
array msg_stat_queue (resource $queue) DESCRIPTION
msg_stat_queue(3) returns the message queue meta data for the message queue specified by the $queue. This is useful, for example, to deter- mine which process sent the message that was just received. PARAMETERS
o $queue - Message queue resource handle RETURN VALUES
The return value is an array whose keys and values have the following meanings: Array structure for msg_stat_queue +--------------+---------------------------------------------------+ | | | |msg_perm.uid | | | | | | | The uid of the owner of the queue. | | | | | | | |msg_perm.gid | | | | | | | The gid of the owner of the queue. | | | | | | | |msg_perm.mode | | | | | | | The file access mode of the queue. | | | | | | | | msg_stime | | | | | | | The time that the last message was sent to the | | | queue. | | | | | | | | msg_rtime | | | | | | | The time that the last message was received from | | | the queue. | | | | | | | | msg_ctime | | | | | | | The time that the queue was last changed. | | | | | | | | msg_qnum | | | | | | | The number of messages waiting to be read from | | | the queue. | | | | | | | | msg_qbytes | | | | | | | The maximum number of bytes allowed in one mes- | | | sage queue. On Linux, this value may be read and | | | modified via /proc/sys/kernel/msgmnb. | | | | | | | | msg_lspid | | | | | | | The pid of the process that sent the last mes- | | | sage to the queue. | | | | | | | | msg_lrpid | | | | | | | The pid of the process that received the last | | | message from the queue. | | | | +--------------+---------------------------------------------------+ SEE ALSO
msg_remove_queue(3), msg_receive(3), msg_get_queue(3), msg_set_queue(3). PHP Documentation Group MSG_STAT_QUEUE(3)