Solved

Threads - Shared - Reference

Posted on 2004-04-23
3
1,216 Views
Last Modified: 2009-07-29
Hi Friends, I have the following code:

use threads;
use threads::shared;
my $a='abc';
my $b : shared = \$a;

For this, I'm getting the error: Invalid value for shared scalar at del.pl line 4.

Basically, I would like to have a variable(here $b) which is shared and holds a reference. Is this possible? If so please help me.

Thanx
0
Comment
Question by:vi_srikanth
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 10

Accepted Solution

by:
Mercantilum earned 300 total points
ID: 10900848
You can't put a reference to an unshared value in a shared scalar:

use threads;
use threads::shared;
my $bar;
my $foo : shared;
$foo = \$bar;

gives:

Invalid value for shared scalar at x line 5.

See http://www.nntp.perl.org/group/perl.ithreads/758
0
 
LVL 1

Assisted Solution

by:joesp
joesp earned 200 total points
ID: 10902738
why not:

#!/usr/bin/perl
use threads;
use threads::shared;
my $a= "abc";
my $b = &share(\$a);
print $a . "\n";
print $$b . "\n";

0
 
LVL 10

Expert Comment

by:Mercantilum
ID: 10905180
So, you could simply

use threads;
use threads::shared;
my $bar : shared;
my $foo : shared;
$foo = \$bar;
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Perl script not writing to .csv file 6 116
add a syntax to a csv file 8 99
Executing multiple sybase statements in perl dbi 2 100
perl: Cleaning meta tags using RegEX 12 87
I've just discovered very important differences between Windows an Unix formats in Perl,at least 5.xx.. MOST IMPORTANT: Use Unix file format while saving Your script. otherwise it will have ^M s or smth likely weird in the EOL, Then DO NOT use m…
I have been pestered over the years to produce and distribute regular data extracts, and often the request have explicitly requested the data be emailed as an Excel attachement; specifically Excel, as it appears: CSV files confuse (no Red or Green h…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question