a message queue question..


 
Thread Tools Search this Thread
Top Forums Programming a message queue question..
# 1  
Old 03-30-2004
Question a message queue question..

Hi there:
Thanks first. When I use a message queue amony severl processes, will I have to synchronize the queue? I don't think I would have to because a message queue is implemented in a link listed. Correct me If I am wrong...
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Ubuntu

Message Queue in Linux

Hello How can I see the created message queues in the system? (4 Replies)
Discussion started by: xyzt
4 Replies

2. Programming

UNIX Message Queue

Hello !!!!! I have a simple question but i can't find the answer anywhere hope to meet it here. Why it is a bad idea to pass pointers through message queues ? Most structs i see all of their char types are arrays... Is it becase having pointers means we could possibily send wrong bytes ? For... (2 Replies)
Discussion started by: qlyine
2 Replies

3. Programming

Message Queue Problem

Hi all, I need help about message queues, i have a server-client program that communicates each other via msg queue, firstly server opens its msg queue and waits for msg then client opens server msg queue and its own msg queue(for receiving msg from server,clients sends msg to server msg... (7 Replies)
Discussion started by: SaTYR
7 Replies

4. Programming

How to limit max no of message in a posix message queue

Hii can anyone pls tell how to limit the max no of message in a posix message queue. I have made changes in proc/sys/fs/mqueue/msg_max But still whenever i try to read the value of max. message in the queue using attr.mq_curmsgs (where struct mq_attr attr) its giving the default value as 10.... (0 Replies)
Discussion started by: mohit3884
0 Replies

5. Programming

message queue

Hello, i need to write a message queue "chat server", that should work only localy. Can anyone please help me with some ideas and peshaps code. I'm studying the UNIX IPC mechanisms right now. So far, i understand how it works but i still cannot get an idea how to write a chat programm... ... (2 Replies)
Discussion started by: etenv
2 Replies

6. Programming

Message Queue with fork() help

hi all... ive been trying this program where i spawn 4 threads... and i am trying to use message queue to send msgs from 3 of the threads to the parent thread... but it doent seem to be working... ive almost pulled out my hair tryin to fix the prob :confused: another wierd thing... (1 Reply)
Discussion started by: strider
1 Replies

7. IP Networking

message queue problem

I am sending and retriving the message to the queue the problem is after retrieving the message can i see what is there in my message queue. (actually in my application i am encountring some garbage value) so i want to retieve this garbage value and also want to know its size how... (0 Replies)
Discussion started by: ramneek
0 Replies

8. Programming

Message Queue Problem Again..

Is there any way one can delete , say , a particular message from a message queue on system V? (2 Replies)
Discussion started by: satansfury
2 Replies

9. Programming

Deleting ALL message queue

hi all, I'm working on this problem for 2 days. Can somebody tell me that how to delete all message queues from the system ? Since "ipcs -q" gives the list of all existing message queue, then there must be a system call and data stucture where from I can fetch the data about all existing... (2 Replies)
Discussion started by: v_rathor
2 Replies

10. UNIX for Advanced & Expert Users

Unix message Queue

Hi, I am working closly with unix message queues i have encountered the following - after creating the Q and start working with it (pushing & pulling) i receive the following stange parameters on the q's - STIME=no_entry Qnum=0 CBYTES=4140 when this happens, the Q is disabled (meaning i... (3 Replies)
Discussion started by: kel
3 Replies
Login or Register to Ask a Question
pipcrm(1)						      General Commands Manual							 pipcrm(1)

NAME
pipcrm - remove a POSIX message queue or a POSIX named semaphore SYNOPSIS
[option]... DESCRIPTION
The command removes one or more specified POSIX message queue or POSIX named semaphore. Options The identifiers are specified by the following options: Unlinks the queue name from the message queue specified by the argument, msqname. If there are no processes with existing open descriptors for the message queue, the queue is destroyed. If one or more processes have the message queue open, the removal of the queue is postponed until all descriptors for the queue have been closed. Unlinks the semaphore name from the semaphore specified by the argument, semname. If there are no processes with existing open descriptors for the semaphore, the semaphore is destroyed. If one or more processes have the semaphore open, the removal of the semaphore is postponed until all descriptors for the semaphore have been closed. The details of the removals are described in mq_unlink(2), and sem_unlink(2). The names can be found by using (see pipcs(1)). SEE ALSO
pipcs(1), mq_unlink(2), mq_open(2), mq_send(2), mq_receive(2), sem_unlink(2), sem_open(2), sem_wait(2), sem_post(2). STANDARDS CONFORMANCE
pipcrm(1)