void reqnotify()
{
int check,recvID;
char que_name[50];
bzero(que_name,50);
printf("\n Enter name for the queue:");
scanf(" %[^\n]%*c",que_name);
//char recvID[50];
//bzero(recvID,50);
printf("\n Enter Receiver's ID for message:");
//scanf(" %[^\n]%*c",recvID);
scanf("%d",&recvID);
int status;
check = search_reciver(recvID, 0);
if(check ==1)
{
status = mq_reqnotify(que_name);
}
else
{
printf("THE CHECK FAILED");
}
}
int main(int argc,char** argv)
{
printf("********************************************************\n");
printf("this demo shows how mq_reqnotify works\n");
printf("the father process will create a new message queue\n");
printf("and then register for message notifying.after that\n");
printf("it will fork two children preocesses to send msgs to \n");
printf("itself.If the mq_reqnotify works,the father process should\n");
printf("print out all the msgs it receives\n");
printf("********************************************************\n");
mq_attr_t attr;
attr_set(&attr,8,1,1);
mqd = mq_open("hakaze",&attr);
message_t msg1,msg2;
msg_init(&msg1,1,"greeting from child1!");
msg_init(&msg2,1,"greeting from child2!");
msg_addreceiver(&msg1,getpid());
msg_addreceiver(&msg2,getpid());
int loopcount = 5;
if(argc >= 2)
{
loopcount = atoi(argv[1]);
}
if(signal(SIGALRM,myhandler) != 0)
{
printf("cannot catch sig: %d\n",SIGALRM);
return 0;
}
if(mq_reqnotify(mqd,SIGALRM) != 0)
{
printf("cannot register for notify with sig: %d\n",SIGALRM);
return 0;
}
if(fork() == 0)
{
//this is child1
int i;
int sendcount = 0;
for(i = 0;i < loopcount;i++) //send msg 16 times
{
if(mq_send(mqd,&msg1) == 0)
{
sendcount++;
}
}
printf("child1 exit, sendcount:%d\n",sendcount);
return 0;
}
else
{
//this is father
if(fork() == 0)
{
//this is child2
int i;
int sendcount = 0;;
for(i = 0;i < loopcount;i++) //send msg 16 times
{
if(mq_send(mqd,&msg2) == 0)
{
sendcount++;
}
}
printf("child2 exit, sendcount:%d\n",sendcount);
return 0;
}
}
while(1)
{
;
}
mq_close(mqd);
return 0;
}
