Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??

BTW. Always, the easiest, safest way to approach threading complex applications, is to write a single-threaded version that operates upon the data in a serial fashion.

Once you have that working, if the data is truly independent, parallelising it is usually quite simple.

For completeness, here is another example based on yours that uses a pool of threads. It is hardly more complicated than the first version:

#! perl -slw use strict; use threads; use threads::shared; use Thread::Queue; use Data::Dump qw[ pp ]; sub helper { my $Q = shift; while( my $ref = $Q->dequeue ) {; lock $ref; $ref->{NEW_KEY} = 1; } } sub my_sub { my( $ref, $n ) = @_; my $Q = new Thread::Queue; my @threads = map async( \&helper, $Q ), 1 .. $n; $Q->enqueue( values %{ $ref } ); $Q->enqueue( (undef) x $n ); $_->join for @threads; } my $hoh = { A => shared_clone( { NAME => 'aa' } ), B => shared_clone( { NAME => 'bb' } ), }; pp $hoh; my_sub( $hoh, 2 ); pp $hoh;

The output is identical to the earlier version.


Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^3: Multi-threads newbie questions by BrowserUk
in thread Multi-threads newbie questions by daverave

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others rifling through the Monastery: (6)
As of 2024-03-28 14:08 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found