9 More Discussions You Might Find Interesting
1. Programming
I have a problem understanding the different scheduling queues (Ready Queue, I/O Queue, Job Queue) Can you please explain/illustrate/differentiate these queues to me? Thanks a lot guys.;) (1 Reply)
Discussion started by: zel2zel
1 Replies
2. UNIX for Dummies Questions & Answers
can any body provide a tutorial that explains the concept of message queues in UNIX in great detail (1 Reply)
Discussion started by: asalman.qazi
1 Replies
3. UNIX for Advanced & Expert Users
#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);
}
the program prints -1 as the result of msgsnd ,which means that msgsnd doesn't... (1 Reply)
Discussion started by: tolkki
1 Replies
4. Programming
hi
I am using posix functions such as mq_open, mq_close and including the mqueue.h. but its giving a linking error,"undefined reference to mq_open and mq_close".
it it that we have to link some library or so while compiling... plzzz help
Thanxs
Mohit (0 Replies)
Discussion started by: mohit3884
0 Replies
5. UNIX for Dummies Questions & Answers
let 3 processes a, b and c are sharing msgs using msg queues.process 'a' sending msg to 'c' and in turn 'c' send sthat msg to 'b'.if something happens to c how can 'a' and 'b' know that 'c' is not available?????? (2 Replies)
Discussion started by: sukaam
2 Replies
6. Programming
Hi all,
I've been trying for hours to figure out how to turn my 2-program (one to send and one to receive) "chat system" using message queues, into a single program where each concurrent component (entity) will both send and receive messages. PLEASE give me a hand with this, I'm starting to... (9 Replies)
Discussion started by: mgchato
9 Replies
7. Linux
RH 7.2
Are there any commands to check the print queue status? Something along the lines of AIX's "qchk"?
Thanks!! (2 Replies)
Discussion started by: jalburger
2 Replies
8. UNIX for Advanced & Expert Users
Hi,
I submit some processes throught an at queue with the cmd at -q queue.
I can easily check the waiting process with atq. But how can I check running processes within a specific queue ?
Thanks,
Stef (2 Replies)
Discussion started by: stef
2 Replies
9. UNIX for Dummies Questions & Answers
I have a print queue set up with the following options: remote, standard processing, Hostname=(A Windows 2000 Server), bsd print spooler. It takes about 1 minute to transfer a 100 kb file and it times out (downs the queue) on larger files. When tested on a different system at a different location... (2 Replies)
Discussion started by: Scottb7711
2 Replies
dispatch(3) BSD Library Functions Manual dispatch(3)
NAME
dispatch -- the dispatch framework
SYNOPSIS
#include <dispatch/dispatch.h>
DESCRIPTION
The dispatch framework allows blocks to be scheduled for asynchronous and concurrent execution via the core functions described in
dispatch_async(3) and dispatch_apply(3).
Dispatch queues are the basic units of organization of blocks. Several queues are created by default, and applications may create additional
queues for their own use. See dispatch_queue_create(3) for more information.
Dispatch groups allow applications to track the progress of blocks submitted to queues and take action when the blocks complete. See
dispatch_group_create(3) for more information.
The dispatch framework also provides functions to monitor underlying system events and automatically submit event handler blocks to dispatch
queues.
SEE ALSO
dispatch_after(3), dispatch_api(3), dispatch_apply(3), dispatch_async(3), dispatch_benchmark(3), dispatch_group_create(3),
dispatch_object(3), dispatch_once(3), dispatch_queue_create(3), dispatch_semaphore_create(3), dispatch_source_create(3), dispatch_time(3)
Darwin May 1, 2009 Darwin
