线程共享 perl [英] thread shared perl

问题描述

我写了一个代码，我需要使它成为多线程的.Evething 有效，但每个循环重复 4 次:

i wrote a code and i need to make it multithreaded. Evething works, but every loop repeats 4 times:

use LWP::UserAgent;
use HTTP::Cookies;
use threads;
use threads::shared;

$| = 1;

$threads = 4;
my @groups :shared = loadf('groups.txt');

my @thread_list = ();
$thread_list[$_] = threads->create(\&thread) for 0 .. $threads - 1;
$_->join for @thread_list;
thread();

sub thread
{
    my $url = 'http://www.site.ru/';
    my $response = $web->post($url, Content =>
                    ['st.redirect' => ''
                    ]);
    foreach $i (@groups)
    {

        my $response  = $web->get($i);
        if(!($response->header('Location')))
        {
            ---------;
        }
        else
        {
            ----------;
        }

    }

}

sub loadf {
    open (F, "<".$_[0]) or erroropen($_[0]); 
    chomp(my @data = <F>);
    close F;
    return @data;
}

groups.txt :

groups.txt :

http://www.odnoklassniki.ru/group/47357692739634
http://www.odnoklassniki.ru/group/56099517562922

我知道我需要使用threads::shared；但我无法理解如何使用它.

I understand that i need to use threads::shared; but i can't undestand how to use it.

您的帖子没有太多上下文来解释代码部分；请更清楚地解释您的场景.

Your post does not have much context to explain the code sections; please explain your scenario more clearly.

推荐答案

问题是你永远不会从 @groups 中删除，所以所有线程都在 @groups 中完成所有工作>.

The problem is that you never remove from @groups, so all threads do all jobs in @groups.

这是一种解决方案.

use threads;
use Thread::Queue 3.01 qw( );

my $NUM_WORKERS = 4;

sub worker {
   my ($url) = @_;
   ... download the page ...
}

my $q = Thread::Queue->new();
for (1..$NUM_WORKERS) {
   async {
      while (my $url = $q->dequeue()) {
         worker($url);
      }
   };
}

$q->enqueue($_) for loadf('groups.txt');
$q->end();
$_->join() for threads->list;

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