Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: In need of multi threaded perl assistance
Top Forums Shell Programming and Scripting In need of multi threaded perl assistance Post 302281374 by cbkihong on Wednesday 28th of January 2009 09:00:59 PM
Old 01-28-2009
If you have Perl 5.10, life is much more easier for you as a lot of improvements to thread support has been made. Considering installing it if you need to use threads properly (you don't necessarily need to install perl as root or with other admin privilege). 5.8 and earliers' thread support is crippled in a lot of ways that I think I would stay away from it, and use an environment with more comprehensive thread support, such as Java.

Everything below would be 5.10 specific. I haven't actually tried 5.10 before, so you should share your findings with us if you venture it.

You can probably check for non-blocking join() using the is_joinable() method. I have not used it before but there are examples citing this on the threads manpage.

You can also list the joinable threads so that you don't have to keep checking each thread object for non-blocking join:

Code:
my @joinable = threads->list(threads::joinable)

threads - perldoc.perl.org

Do let us know if they work for you.
 

10 More Discussions You Might Find Interesting

1. Programming

multi-threaded server, pthreads, sleep

I am trying to writa a multi-client & multi-threaded TCP server. There is a thread pool. Each thread in the pool will handle requests of multiple clients. But here I have a problem. I find a solution but it is not how it must be... i think. When threads working without sleep(1) I can't... (0 Replies)
Discussion started by: Parahat Melayev
0 Replies

2. Programming

HOWTO: Calculate the balance of work in multi-threaded app.

I was wondering if anyone could give me a good idea how to calculate how balanced the threading is on a multi-threaded application. I want a percentage, such as "threads are 80% balanced." This is the way I am currently going about it, maybe it is good, maybe not. First, whenever a thread... (2 Replies)
Discussion started by: DreamWarrior
2 Replies

3. Shell Programming and Scripting

Assistance with Perl and HTTP

I need to query a http site and then parse the xml results, this works well if I use the string in IE but I require an automated solution. I have tried using the following as well as HTTP::Request, nothing seems to work any suggestions would be appreciated, I have tried diffrnt things I found on... (7 Replies)
Discussion started by: bryanthomas
7 Replies

4. AIX

multi threaded program is hanging

I have a Multithreaded program which is hanging on AIX. OS Version: AIX 5.2 and thread library version : 5.2.0.75 We Initiate the process with 50 threads..when we are disconnecting from the process it hangs.There is lots of other stuff involved here.I am just sending the piece of the problem with... (0 Replies)
Discussion started by: hikrishn
0 Replies

5. UNIX for Advanced & Expert Users

Multi-threaded encryption @ Fedora 11

Hello, are any of the encryption programs capable of true multi-threading ? Friend of mine tells me that he's been running some testing on Fedora 11 and that the kernel doesn't support multi-threading at that level. I've been looking into TrueCrypt, encfs and both calm to support... (0 Replies)
Discussion started by: TehOne
0 Replies

6. Linux

Multi-threaded encryption @ Fedora 11

Hello, are any of the encryption programs capable of true multi-threading ? Friend of mine tells me that he's been running some testing on Fedora 11 and that the kernel doesn't support multi-threading at that level. I've been looking into TrueCrypt, encfs and both calm to support... (1 Reply)
Discussion started by: TehOne
1 Replies

7. Programming

multi-threaded memory leak

Hello All : I write a .c program to test the exactually resource the memory leak as follows： 1 #include <stdio.h> 2 #define NUM 100000 3 void *Thread_Run(void * arg){ 4 //TODO 5 //pthread_datch(pthread_self()); 6 int socket= (int)arg; 7 ... (1 Reply)
Discussion started by: aobai
1 Replies

8. UNIX for Dummies Questions & Answers

Assistance with combining, sorting and saving multi files into one new file

Good morning. I have a piece of code that is currently taking multiple files and using the CAT.exe command to combine into one file that is then sorted in reverse order based on the 3rd field of the file, then displayed on screen. I am trying to change this so that the files are being combined into... (4 Replies)
Discussion started by: jaacmmason
4 Replies

9. Programming

Deallocating memory in multi-threaded environment.

I'm having a hard time figuring out how to manage deallocation of memory in multithreaded environments. Specifically what I'm having a hard time with is using a lock to protect a structure, but when it's time to free the structure, you have to unlock the lock to destroy the lock itself. Which will... (5 Replies)
Discussion started by: gngrwzrd
5 Replies

10. Shell Programming and Scripting

script for multi-threaded bash processes

hey everyone, I'm having some trouble breaking down some code. It's simple a control script that takes machines meant to be backed up from a list. Then according to that will run multi-threaded processes up until the specified thread limit. for example if there are 4 machines to be backed up,... (2 Replies)
Discussion started by: terrell
2 Replies

LEARN ABOUT PHP

shift

shift(1)                                                           User Commands                                                          shift(1)

NAME

       shift - shell built-in function to traverse either a shell's argument list or a list of field-separated words

SYNOPSIS

   sh
       shift [n]

   csh
       shift [variable]

   ksh
       * shift [n]

DESCRIPTION

   sh
       The positional parameters from $n+1 ... are renamed $1 ... . If n is not given, it is assumed to be 1.

   csh
       The  components of argv, or variable, if supplied, are shifted to the left, discarding the first component. It is an error for the variable
       not to be set or to have a null value.

   ksh
       The positional parameters from $n+1 $n+1 ... are renamed $1 ..., default n is 1. The parameter n can  be  any  arithmetic  expression  that
       evaluates to a non-negative number less than or equal to $#.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words,  following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
           able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation  are  not
           performed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), ksh(1), sh(1), attributes(5)

SunOS 5.10                                                          15 Apr 1994                                                           shift(1)
All times are GMT -4. The time now is 06:19 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy